How Mixmax Uses Node and Go to Process 250M Events a day

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Mixmax
Bringing email into the 21st century

Background

Mixmax is the product that your team uses to communicate with the outside world. What Slack did for internal communication, we’re doing for email and external communication.

Building a communication platform means processing a TON of data. Our backend, built primarily in Node and Go, processes up to 250M events a day with 200k/minute at peak load. As the glue for an organization’s communication, not only are we processing a huge number of internal events, but we’re also processing data from external sources like CRMs and ATSs totalling 3.2 million events and amounting to a data volume exceeding 14 GB each hour. We've already scaled our platform up 2x in the past 3 months and plan to grow another 10x this year, all while maintaining strict "three 9's" uptime that our customers expect, as they rely on Mixmax all day to get their work done.

I’m the Head of Platform Engineering at Mixmax, which means that I spend most of my time supporting and unblocking our engineering teams. I’ve spent most of my time working in SaaS with a stint in security.

Mixmax Engineering

Our engineering team currently consists of 15 engineers with highly varied backgrounds. Today, everyone on the team is a full-stack engineer, although all of us have our own strengths (i.e. Elasticsearch, MongoDB, devops, security, etc). It makes for an amazing mix with everyone bringing their own superpower to the table. Our team is also highly distributed, with engineers in Australia, Canada, Mexico, and the US.

We’re self-organized into a constantly varying number of teams. We have two evergreen teams, our Core and Support teams, which are responsible for the two pillars of engineering departments - stability and quality. Beyond those two teams, we create teams around our product priorities. This means each product team lives for the duration of the development life-cycle, and no longer. This dynamic nature allows us to more seamlessly share and distribute knowledge across the team so that we’re all constantly learning and growing. Teams are also cross-functional, which helps us have consistent and open feedback between everyone in engineering, product and design. Each team defines what their success and failure metrics are, as well as they will measure their own progress (some teams do two week sprints, some do Kanban, etc). The one constant is that every team agrees and publicizes the metrics that they use to monitor their own success.

Orthogonal to our teams, we have two guilds: our web guild and our platform guild. Our guilds are for helping us improve our and develop our individual strengths, not for siloing knowledge. Our guilds focus on elevating best practices for their areas of ownership, as well as helping to mentor and provide safety nets for members outside their guild. One clear distinction that we draw, is that we explicitly ensure that guild members are not the only ones during work that would fall into their areas. First and foremost, all engineers are expected to focus on their team, helping them to achieve their goals - as an example, this means that “platform work” is not meant to be worked on by only platform guild members.

Initial architecture and application evolution

Mixmax was originally built using Meteor as a single monolithic app. As more users began to onboard, we started noticing scaling issues, and so we broke out our first microservice: our Compose service, for writing emails and Sequences, was born as a Node.js service. Soon after that, we broke out all recipient searching and storage functionality to another Node.js microservice, our Contacts service. This practice of breaking out microservices in order to help our system more appropriately scale, by being more explicit about each microservice’s responsibilities, continued as we broke out numerous more microservices.

This resulted in a system with many Node.js microservices and one still fairly large Meteor service. All of these Node.js services did, and still do, run on Elastic Beanstalk in AWS as we optimized for developer velocity by using a managed deployment platform. The Meteor app ran in Galaxy, which had necessitated that we use a subdomain-based microservice approach for that main Meteor app to talk to the other microservices.

As we began to scale super quickly, with more and more customers joining the platform, we started to see that the Meteor app was still having a lot of trouble scaling due to how it tried to provide its reactivity layer. To be honest, this led to a brutal summer of playing Galaxy container whack-a-mole as containers would saturate their CPU and become unresponsive. I’ll never forget hacking away at building a new microservice to relieve the load on the system so that we’d stop getting paged every 30-40 minutes. Luckily, we’ve never had to do that again! After stabilizing the system, we had to build out two more microservices to provide the necessary reactivity and authentication layers as we rebuilt our Meteor app from the ground up in Node. This also had the added benefit of being able to deploy the entire application in the same AWS VPCs. Thankfully, AWS had also released their ALB product so that we didn’t have to build and maintain our own websocket layer in EC2. All of our microservices, except for one special Go one, are now in Node with an Nginx frontend on each instance, all behind ELBs or ALBs running in Elastic Beanstalk.

Data storage at Mixmax

Originally, we had a single Mongo replica set that we stored everything on. As we scaled, we realized two things:

  • A single Mongo replica set wasn’t going to cut it for our many quickly growing collections
  • Analytics and rich searching don’t scale well in Mongo.

To solve for the first item, we now run multiple large scale Mongo deployments with a mix of replica sets and sharded replica sets (depends on the application activity for the given database). In solving for the second item, we now run multiple large Elasticsearch deployments to provide the majority of our rich searching functionality.

We also heavily use Redis across the entire platform for things like distributed locking, caching, and backing part of our job queuing layer. This has led to our most recent (and ongoing!) scaling challenge.

(here’s a screenshot of the tool that we use to administer to our worker queues that live on Redis)

Asynchronous processing at Mixmax

At Mixmax, we have multiple queueing systems running that all exhibit very different behaviours, due to all the different ways that our platform is used. We’ve gone through quite a few Redis-backed job queueing technologies before we arrived at our current place (from Kue to bull-queue to bee-queue to a mix of bee-queue and AWS Kinesis). Our current stack, a mix of bee-queue and AWS Kinesis, allows us to both seamlessly handle our steadily active queues (i.e. for sending emails) and weather the storm of work that powers our CRM syncing engines. This has been a really fun challenge, as part of this system handles in the high hundreds of millions of jobs a day with sporadic spikes of millions of jobs per minute. We’ve made huge progress here, and we still have a lot of progress to make as we continue to scale this asynchronous processing system.

How we ship

Our workflow centers around getting code live ASAP. Our CI pipeline is centered around GitHub as our VCS tied into TravisCI. Our CD pipeline then continues on from there using AWS Elastic Beanstalk to deploy new application versions.

All developers are able to work on a local copy of the entire infrastructure. Once a developer has their code ready, it goes through review on GitHub - side note, we’re loving all the work that they’re putting into their code review tooling. After code is reviewed and good to go, it lands on our staging environment, where we manually QA a few core flows before we’ll elevate the code to be released on our production environment. For running all of our services locally, we currently use a mix of supervisord and a tool built by one of our engineers named custody.

A huge part of our continuous deployment practices is to have granular alerting and monitoring across the platform. To do this, we run Sentry on-premise, inside our VPCs, for our event alerting, and we run an awesome observability and monitoring system consisting of Statsd, Graphite and Grafana. We have dashboards using this system to monitor our core subsystems so that we can know the health of any given subsystem at any moment. This system ties into our PagerDuty rotation, as well as alerts from some of our CloudWatch alarms (we’re looking to migrate all of these to our internal monitoring system soon).

(screenshot of our monitoring cluster monitoring our strongDM gateways)

Security hygiene at distributed scale

Being a distributed team is in our DNA. One challenge that we’ve faced as a part of being such a distributed team is providing auditible, available, secure and stable access to databases in our private networks for engineers that are authorized and need to have access to them. In a distributed world, auditing database access, credential management and rotation, and onboarding can be a nightmare. Someone running a query on a staging DB that’s taking down the test environment for every? Good luck hunting that down. Have a new engineer onboard and they need to run an audit query on the staging DB to see if their new code might break an old schema? Have fun configuring that. Need to run your periodic credential rotation, ...enjoy. This was not only a huge pain point for our team, but me personally, and then strongDM came into the picture.

strongDM acts as a control plane to manage access to every database and server. By centralizing all database credentials & ssh keys in strongDM, onboarding and offboarding becomes much faster. Simply add a user to a group and since the user never has access to the DB credentials (strongDM handles that) you never need to worry about rotating credentials purely due to employee offboarding. For auditing, since strongDM knows and can monitor each users’ connection, you have direct insight into every single query or access that a user makes - a godsend for auditing. When it comes to periodically rotating keys, it’s even simpler, as your rotating credential sets instead of credentials per user, without any action needed from a single other engineer - it simply works. Our engineers have enjoyed strongDM so much that some have even tweeted about it in moments of pure joy.

I seriously cannot imagine working without strongDM now. It’s one of those tools that seamlessly fits into your workflow and you can’t envision work without it.

(screenshots of strongDM in action)

What’s next? Processing all the things.

It’s an exciting time to be at Mixmax, our entire company is scaling quickly (we’ve grown 4x in the last two years, and this trend isn’t slowing down) along with our customer base. This means that we’re processing more data than ever before, and we’re having to get more and more creative to keep up with the amount of data coming in.

We’re currently prototyping our next generation processing systems, building them out in different languages, with different tech - it’s a fantastic time to join to come help us figure out our future direction as an engineering team all while working on a platform that our customers love!

Mixmax
Bringing email into the 21st century
Tools mentioned in article
Open jobs at Mixmax
Full-Stack Engineer ( React + NodeJS)
<div class="p-rich_text_section"><strong data-stringify-type="bold">The opportunity<br></strong><br>Exciting news - Mixmax hit $10 million in annual revenue and we’re profitable! We just raised more money and are investing more to accelerate growth. We’re looking for great people to help us ship high-quality features to meet the needs of bigger customers.<br>We’re hiring UX-focused Frontend Engineers of varying experience levels to own our client-side codebase across both our Chrome extension and our web apps. We need engineers skilled in modern web frameworks such as React, as well as highly technical engineers with deep client-side Javascript expertise and strong knowledge of fundamental web technologies and browser APIs. Regardless of experience level, our frontend engineers play an important role in making Mixmax the easiest-to-use solution for our customers, all as part of a globally distributed team.<br><br><strong data-stringify-type="bold">The team</strong><br>We’re hiring a full-stack engineer for team Rocket, a cross-functional product team that is in charge of the integration with Salesforce, as well as reporting and a bunch of other integrations and components. The current composition of the team is four senior developers, a product manager, an engineering manager, a designer, and a QA shared with other team. We need a fifth engineer to complement the team, who is experienced in modern web frameworks such as React, but who is also willing to work on the backend, which is based on a microservices (Node) architecture (the work distribution will be around 40-60% frontend-backend).<br><br>&nbsp;<strong data-stringify-type="bold">Within three months, you’ll:</strong></div> <ul class="p-rich_text_list p-rich_text_list__bullet" data-stringify-type="unordered-list" data-indent="0" data-border="0"> <li data-stringify-indent="0" data-stringify-border="0">Work with React and Styled Components.</li> <li data-stringify-indent="0" data-stringify-border="0">Understand our microservices architecture and become familiar with the codebase of the main services.</li> <li data-stringify-indent="0" data-stringify-border="0">Be directly involved in the entire development lifecycle of Mixmax’s product.</li> <li data-stringify-indent="0" data-stringify-border="0">Actively participate in our team Agile ceremonies.</li> <li data-stringify-indent="0" data-stringify-border="0">Learn the basics about Salesforce and how the integration with Mixmax works.</li> <li data-stringify-indent="0" data-stringify-border="0">Demo your first new feature to the entire company!</li> </ul> <div class="p-rich_text_section"><strong data-stringify-type="bold">Within six months, you could:</strong></div> <ul class="p-rich_text_list p-rich_text_list__bullet" data-stringify-type="unordered-list" data-indent="0" data-border="0"> <li data-stringify-indent="0" data-stringify-border="0">Join one of our internal guilds and contribute to the engineering roadmap.</li> <li data-stringify-indent="0" data-stringify-border="0">Be responsible for managing and improving our product quality and robustness by improving our alerts and logging (we use Sentry).</li> <li data-stringify-indent="0" data-stringify-border="0">Ship work on critical projects and features while working with other engineers.</li> <li data-stringify-indent="0" data-stringify-border="0">Contribute to improving the performance and robustness of our services and app.</li> </ul> <div class="p-rich_text_section"><strong data-stringify-type="bold">Preferred skills and background:</strong></div> <ul class="p-rich_text_list p-rich_text_list__bullet" data-stringify-type="unordered-list" data-indent="0" data-border="0"> <li data-stringify-indent="0" data-stringify-border="0">We’re looking for engineers with expertise in React, Styled Components, and state management like Redux.</li> <li data-stringify-indent="0" data-stringify-border="0">At the senior level, familiarity with modern browser APIs, and writing resilient, clean and tested code.</li> <li data-stringify-indent="0" data-stringify-border="0">We’re a distributed team working in multiple time zones, so excellent documentation and communication skills are paramount!</li> </ul> <div class="p-rich_text_section"><strong data-stringify-type="bold">It’s also awesome (and 100% not a requirement!) for you to:</strong></div> <ul class="p-rich_text_list p-rich_text_list__bullet" data-stringify-type="unordered-list" data-indent="0" data-border="0"> <li data-stringify-indent="0" data-stringify-border="0">Have some knowledge of Salesforce.</li> <li data-stringify-indent="0" data-stringify-border="0">Be able to refer other great engineers to work at Mixmax!</li> </ul> <h3><strong><br>Our commitment to diversity and inclusion</strong></h3> <p><span style="font-weight: 400;">At Mixmax, we know that nobody's perfect and that no one ever matches 100% with a job description. That's okay–we're human after all! Diversity and inclusion are core to our culture, and we're actively committed to building a more inclusive and open workplace. No matter your background or how you identify, if you're excited about this role, please apply today!</span></p> <h3><strong>The Mixmax story</strong></h3> <p><span style="font-weight: 400;">At Mixmax, our vision is a world without busy work. Since our launch in 2015, Mixmax has become the product of choice for over 10,000 Sales and Customer Success teams to eliminate and automate repetitive work. This means more time to focus on what matters: engaging and serving the needs of customers.</span></p> <p><span style="font-weight: 400;">We’re extraordinarily proud of the company we’ve built. We’re a driven, passionate, responsible group that values personal and professional growth equally. We take care of ourselves, our families, our customers, and one another. We believe in sustainable and diverse approaches to work and life, because optimizing for the long-term is the best path to success.</span></p> <p><span style="font-weight: 400;">Our company is fully remote and distributed, with team members worldwide. We offer competitive salaries, meaningful equity, and generous benefits. And you get to work on a product people absolutely love!</span></p>
Senior Backend Engineer
<h3><strong>The Opportunity</strong></h3> <p><span style="font-weight: 400;">Exciting news - Mixmax hit $10 million in annual revenue and we’re profitable! We just raised more money and are looking to invest more to accelerate growth. <br></span><span style="font-weight: 400;">We’re hiring product-focused software engineers with deep backend expertise and strong attention to detail. As a Backend Engineer, you’ll build the next generation of Mixmax features, scale distributed systems to handle millions of events, and drive quality across a large codebase, all as part of a globally distributed team. You'll also be responsible for improving and strengthening the foundation of our system, improving our team's developer experience, addressing our organisational security needs, and participating in collaborative decision-making about our architecture.<br></span></p> <h3><strong>The team<br></strong><br><sub>We’re hiring Backend Engineers for two of our teams.&nbsp;</sub></h3> <p><strong>Team Rocket</strong>, is a cross-functional product team that is in charge of the integration with Salesforce, as well as reporting and a bunch of other integrations and components. The current composition of the team is four senior developers, a product manager, an engineering manager, a designer, and a QA shared with another team. We need a fifth engineer to complement the team, who is experienced in modern web frameworks such as React, but who is also willing to work on the backend, which is based on a microservices (Node) architecture (the work distribution will be around 40-60% frontend-backend).</p> <p><strong>Team Communicate</strong>, a cross-functional product team that is in charge of tasks, is one of the core elements in our product, as well as the Chrome extension and the dialer, our communication tool inside Mixmax. The current composition of the team is three senior developers, a product manager, an engineering manager, a designer, and a QA shared with another team. Being a distributed team, we try to work asynchronously, with only a few team meetings during the week (daily, planning, retrospective, etc). We mainly use Jira and Slack to communicate, and our tech stack is Node, Mongodb, React, and AWS. We are looking for a fourth engineer to complement the team, someone who is willing to learn and share with the team and help us take our product to the next level!</p> <h3><strong>Within Three Months, You'll</strong></h3> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Work with Node, MongoDB, Elasticsearch, Terraform, Redis, and AWS;</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Make impactful improvements to our production infrastructure; and</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Demo your first new feature to the entire company!</span></li> </ul> <h3><strong>Within Six Months, You'll</strong></h3> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Contribute to the development of critical projects while working closely with other engineers;</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Work with your team to improve our architectural patterns, scalability, and developer experience; and</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Contribute to the culture of a growing team.</span></li> </ul> <h3><span style="font-weight: 400;">&nbsp;</span><strong>Preferred Skills and Background</strong></h3> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">We're looking for engineers who have experience with the core of our tech stack, which includes ES6 JavaScript and/or TypeScript, Node.js, AWS, and MongoDB.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Mixmax is still growing fast, so we love new teammates who strive to grow personally and professionally, beyond just expanding their technical abilities.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">We take pride in the quality of our work, so we're looking for engineers with experience maintaining and supporting the systems they've built.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">We're a distributed team working in multiple time zones, so excellent documentation and communication skills are paramount!</span></li> </ul> <h3><strong>It’s Also Awesome (But 100% Not a Requirement!) For You To Have</strong></h3> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Worked in a distributed codebase with microservices and shared modules;</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Familiarity with secondary tools in our tech stack, like Elasticsearch or Redis;</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Worked on a Salesforce integration; and/or</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">The ability to refer other great engineers to come work at Mixmax! 😉</span></li> </ul> <h3><strong>Our Commitment to Diversity and Inclusion</strong></h3> <p><span style="font-weight: 400;">At Mixmax, we know that nobody's perfect and that no one ever matches 100% with a job description. That's okay—we're human after all! Diversity and inclusion are core to our culture and we're actively committed to building a more inclusive and open workplace. No matter your background or how you identify, if you're excited about this role, we encourage you to apply.</span></p> <h3><strong>The Mixmax Story</strong></h3> <p><span style="font-weight: 400;">At Mixmax, our vision is a world without busywork. Since our launch in 2015, Mixmax has become the product of choice for over 10,000 Sales and Customer Success teams to eliminate and automate repetitive work. This means more time to focus on what matters: engaging and serving the needs of customers.</span></p> <p><span style="font-weight: 400;">We’re extraordinarily proud of the company we’ve built. We’re a driven, passionate, responsible group that values personal and professional growth equally. We take care of ourselves, our families, our customers, and one another. We believe in sustainable and diverse approaches to work and life, because optimizing for the long-term is the best path to success.</span></p> <p><span style="font-weight: 400;">Our company is globally distributed, with remote team members worldwide. We offer competitive salaries, meaningful equity, and generous benefits. And with Mixmax, you get to work on a product people love.</span></p>
Principal Engineer
<h3><strong>The Opportunity</strong></h3> <p><span style="font-weight: 400;">Exciting news - Mixmax hit $12 million in annual revenue and we’re profitable! We just raised more money and are looking to invest more to accelerate growth.</span></p> <p><span style="font-weight: 400;">We are looking for a principal engineer with lead capabilities who can work with and help develop a team of skilled and highly motivated engineers. The successful candidate will also have a deep technical curiosity demonstrated by past roles as an exceptional contributor. We are growing and you will play a key role in designing and implementing our next generation architecture.</span></p> <p><span style="font-weight: 400;">&nbsp;</span></p> <h3><strong>What you'll do<br></strong></h3> <p><span style="font-weight: 400;">In this role you will not only contribute code at the highest level individually but also provide technical leadership to one or more agile teams (~4-8 engineers). You will champion software engineering best practices, implementing and encouraging iteration and breaking down complex projects into smaller, discrete parts. Highly experienced, you will exemplify a technical lead, comfortable discussing design and architecture trade-offs. You will advocate for and foster a productive, collaborative, and results driven culture around the team.</span></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Champion effective Agile development processes</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Propose and own architecture initiatives and platform improvements</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Mentor software engineers to help them develop their software design and development skills</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Show leadership as a hands-on developer in multiple layers of the software stack</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Show a sense of ownership and pride in your role as a leader and make us believe you will excel</span></li> <li style="font-weight: 400;">Work with everyone from engineers to product owners to help communicate, prioritize, influence, and inform key product decisions.</li> </ul> <h3><span style="font-weight: 400;">&nbsp;</span><strong>Preferred Skills and Background</strong></h3> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">You have a BS or MS in Computer Science or equivalent</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">You bring 5 or more years of experience as a Principal / Software Engineer, including 1-2 years in a technical leadership or mentoring role</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">You have at least 2 years of experience working with AWS</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">You have a broad and deep knowledge of AWS and backend architectures, RESTful APIs, NoSQL databases, analytics, and operations.&nbsp; You are conversant in front end architectures. We run on AWS and develop in Node.js and ES6/Typescript.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">You have consistently exceeded expectations throughout your career, and you can describe specific activities and projects which demonstrate this behavior</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Excellent documentation and communication skills; we are 100% distributed and we work across multiple time zones.&nbsp;</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">We recognize that the ability to collaborate synchronously is sometimes necessary. To join important meetings and pair programs with teammates, we ask that you have the flexibility to work from 9 AM - 11 AM US Pacific Time, on some days as needed.</span></li> </ul> <h3><strong>It’s Also Awesome (But 100% Not a Requirement!) For You To Have</strong></h3> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience with event driven architectures</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience with a Salesforce integration</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">The ability to refer other great engineers to come work at Mixmax! 😉</span></li> </ul> <h3><strong>Our Commitment to Diversity and Inclusion</strong></h3> <p><span style="font-weight: 400;">At Mixmax, we know that nobody's perfect and that no one ever matches 100% with a job description. That's okay—we're human after all! Diversity and inclusion are core to our culture and we're actively committed to building a more inclusive and open workplace. No matter your background or how you identify, if you're excited about this role, we encourage you to apply.</span></p> <h3><strong>The Mixmax Story</strong></h3> <p><span style="font-weight: 400;">At Mixmax, our vision is a world without busywork. Since our launch in 2015, Mixmax has become the product of choice for over 10,000 Sales and Customer Success teams to eliminate and automate repetitive work. This means more time to focus on what matters: engaging and serving the needs of customers.</span></p> <p><span style="font-weight: 400;">We’re extraordinarily proud of the company we’ve built. We’re a driven, passionate, responsible group that values personal and professional growth equally. We take care of ourselves, our families, our customers, and one another. We believe in sustainable and diverse approaches to work and life, because optimizing for the long-term is the best path to success.</span></p> <p><span style="font-weight: 400;">Our company is globally distributed, with remote team members worldwide. We offer competitive salaries, meaningful equity, and generous benefits. And with Mixmax, you get to work on a product people love.</span></p>
QA Engineer
<p><strong>The Opportunity</strong></p> <p><span style="font-weight: 400;">Exciting news - Mixmax crossed $10 million in annual revenue!&nbsp;&nbsp;</span></p> <p><span style="font-weight: 400;">Mixmax is the #1 product helping Revenue teams to become automatically proactive by eliminating busywork for a flawless customer experience.</span></p> <h3><strong>What you’ll be doing:</strong></h3> <p><span style="font-weight: 400;">As a Senior QA Engineer, you will draw on your testing and coding knowledge and creativity to design tests, and maintenance procedures, and automate test capabilities in order to make sure that Mixmax delivers high-quality solutions to its clients. Your role is an essential part of the software development life cycle, as besides working very closely with our development teams to provide the best product possible, you will also get the chance to work on establishing our test frameworks or on creating your own to tackle specific problems put in front of you.&nbsp;</span></p> <p><strong>Preferred Skills and Background</strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">3+ years of experience</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Proven experience in software quality assurance</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Attention to details and passion/knack for bug detection</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Ability to think "destructively" in order to add quality to Mixmax product</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">QA advocate</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Great knowledge of testing theory/principles with ability to demonstrate it on concrete examples</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Great knowledge of at least one programming language (NodeJS, Javascript, Python, Ruby...) and industry standard test frameworks (Cucumber, Selenium, Cypress, RestAssured, Puppeteer…)</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Confident using Git</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Confident using Linux, in particular terminal/cli commands</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Knowledge and experience using CI/CD processes and tools&nbsp;</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Excellent documentation and communication skills&nbsp;</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Time management flexibility</span></li> </ul> <p><strong>Bonus Points (</strong><strong>it’s also awesome -but 100% not a requirement!- for you to have)</strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience with bash scripting, Docker, Kubernetes</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience with cloud environments/services like AWS</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Strong problem solving and debugging skills</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Understanding of agile principles (Scrum, Kanban)</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Have worked in a distributed codebase with microservices and defined testing protocols and tools for end to end testing.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Familiar with data analysis tools and have experience owning failure analysis investigations.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Have experience digging into and debugging performance issues and reports.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Be able to refer other great teammates to work at Mixmax! 😉</span></li> </ul> <p><strong>Our Commitment to Diversity and Inclusion</strong></p> <p><span style="font-weight: 400;">At Mixmax, we know that nobody's perfect and that no one ever matches 100% with a job description. That's okay–we're human after all! Diversity and inclusion are core to our culture, and we're actively committed to building a more inclusive and open workplace. No matter your background or how you identify, if you're excited about this role, please apply today!</span></p> <h3><strong>The Mixmax Story</strong></h3> <p><span style="font-weight: 400;">At Mixmax, our vision is a world without busywork. Since our launch in 2015, Mixmax has become the product of choice for over 10,000 Sales and Customer Success teams to eliminate and automate repetitive work. This means more time to focus on what matters: engaging and serving the needs of customers.</span></p> <p><span style="font-weight: 400;">We’re extraordinarily proud of the company we’ve built. We’re a driven, passionate, responsible group that values personal and professional growth equally. We take care of ourselves, our families, our customers, and one another. We believe in sustainable and diverse approaches to work and life, because optimizing for the long-term is the best path to success.</span></p> <p><span style="font-weight: 400;">Our company is distributed, with remote team members worldwide.&nbsp; We offer competitive salaries, meaningful equity, and generous benefits. And you get to work on a product people absolutely love!</span></p>
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