Senior Backend Engineer | Customer.io
Posted 2025-09-08
Remote, USA
Full Time
Immediate Start
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">We are seeking a Senior Backend Engineer to join our growing Engineering team!</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3"><a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> is looking for collaborative senior scaling developers who love solving interesting puzzles and are excited to help us build a scalable platform that our customers love. Our small, remote-first team is fun-loving, passionate, and highly effective. We offer many opportunities to grow and refine your skills while having a significant impact. Our team members have backgrounds in various industries, from AdTech to Gaming. We believe embracing our unique perspectives and expertise is the key to our success as a collaborative team.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">As a distributed company, we value diversity and are committed to giving you the flexibility and freedom to work from anywhere in the world on a schedule that fits your family and your life.</p>
<h3 class=" text-white font-semibold text-lg mb-2">Some things you’ll do</h3>
<ul class=" text-base sm:text-lg marker:text-color list-inside list-disc text-gray-500 list-disc list-outside pl-3 mb-6">
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Be a model and mentor for writing well-architected, well-tested, and easy-to-understand services in Go that help our customers easily send timely & relevant messages at scale.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Apply your unique perspective to help us define and build the next generation of features and infrastructure needed to help our customers and company flourish.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Work with our tech support teams to diagnose operational issues and help our customers achieve their goals with our product.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Take an active role in a friendly, supportive team that encourages you and the company to grow as individuals, professionals, and teams.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Mentor your coworkers through code review, pair programming, team collaboration, and training to help improve our collective knowledge and best practices.</span></li>
</ul>
<h3 class=" text-white font-semibold text-lg mb-2">About you</h3>
<ul class=" text-base sm:text-lg marker:text-color list-inside list-disc text-gray-500 list-disc list-outside pl-3 mb-6">
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Works in North/South American time zones</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Preferably 7+ years of relevant experience.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">A track record of delivering performant and scalable distributed applications on cloud infrastructure in Golang.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">A collaborative mindset backed by excellent communication skills and a desire to help us make great decisions in an empathetic and respectful way.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Experience working with customers and applying a deep understanding of their needs to produce timely solutions to their real-world problems.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">A solid understanding of scalability problems and experience building out performant distributed applications on cloud infrastructure.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Comfort working in UNIX environments and applying modern collaborative development practices.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Experience in working with RDB systems, preferably MySQL.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Ability to deliver high-quality solutions quickly and without mentorship.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Experience working within a distributed company is preferred.</span></li>
</ul>
<h3 class=" text-white font-semibold text-lg mb-2">About <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a></h3>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Our mission at <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> is to power automated communication that people like to receive. Today over 7,100 internet businesses use <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> to manage, send, and track the performance of emails, SMS, push notifications, and in-app messages. Unlike typical marketing platforms, <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> helps businesses increase relevance by using behavioral data: what people do or don’t do when logged in to a web or mobile app.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">We are offering a starting salary of $160,000 – $184,000 USD (or equivalent in local currency) depending on experience and subject to market rate adjustment.</p>
<h3 class=" text-white font-semibold text-lg mb-2">Benefits at <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> include:</h3>
<ul class=" text-base sm:text-lg marker:text-color list-inside list-disc text-gray-500 list-disc list-outside pl-3 mb-6">
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Unlimited PTO – we encourage at least 20 vacation days (in addition to holidays and sick days) so that you can unwind, unplug, and recharge</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">16 weeks paid parental leave (including adoption and foster care)</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">100% paid insurance premiums for you and your dependents</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">401k retirement matching – up to 5% dollar-for-dollar match to retirement contributions</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">$1,500 annual healthy lifestyle budget (for gym memberships, classes, fitness equipment)</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">$250/monthly Remote Work Stipend to be used for home internet, cell phone, and other miscellaneous remote work costs</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">$300/month co-working space rental reimbursement</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">$2,000/yearly professional education budget for conferences, courses, workshops, books, etc.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">$1,500 home office budget to make sure your working space is ergonomic and just what you need to do your best work!</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">One month sabbatical after five years at <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a></span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">We also have opportunities to meet in person with your peers throughout the year</span></li>
</ul>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">All final candidates will be asked to complete a background check and employment verifications as part of our pre-employment process.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3"><a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> recognizes the stifling impact of systemic injustice on diverse communities. We commit to using our influence to increase inclusion and equity within the tech industry. We strive to build an inclusive team culture, implement bias-free hiring practices, and develop community partnerships to expand our global impact.</p>
<h2><strong class=" font-semibold">Join us!</strong></h2>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Check out our <a href="https://customer.io/careers/" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">careers page</a> for more information about why you should <a href="https://customer.io/about/" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">come work with us!</a> We are passionate about our core values of Empathy, Transparency, Responsibility, and Awkwardness and are looking for new coworkers to share and build that passion!</p>
<h3 class=" text-white font-semibold text-lg mb-2">How to apply</h3>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Apply at the link below and tell us why you’re interested in the position! ****We plan to respond to all applicants with a status update about your application.</p>
<h3 class=" text-white font-semibold text-lg mb-2">Here’s what you can expect from our hiring process:</h3>
<ol>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">30 minute video call with a Recruiter</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">60 minute Technical Interview with two members of our engineering team</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Take Home Assignment</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">60 minute Assignment Review Call with two members of our engineering team</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Final Interview with Hiring Manager</span></li>
</ol>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3"><a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> is looking for collaborative senior scaling developers who love solving interesting puzzles and are excited to help us build a scalable platform that our customers love. Our small, remote-first team is fun-loving, passionate, and highly effective. We offer many opportunities to grow and refine your skills while having a significant impact. Our team members have backgrounds in various industries, from AdTech to Gaming. We believe embracing our unique perspectives and expertise is the key to our success as a collaborative team.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">As a distributed company, we value diversity and are committed to giving you the flexibility and freedom to work from anywhere in the world on a schedule that fits your family and your life.</p>
<h3 class=" text-white font-semibold text-lg mb-2">Some things you’ll do</h3>
<ul class=" text-base sm:text-lg marker:text-color list-inside list-disc text-gray-500 list-disc list-outside pl-3 mb-6">
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Be a model and mentor for writing well-architected, well-tested, and easy-to-understand services in Go that help our customers easily send timely & relevant messages at scale.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Apply your unique perspective to help us define and build the next generation of features and infrastructure needed to help our customers and company flourish.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Work with our tech support teams to diagnose operational issues and help our customers achieve their goals with our product.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Take an active role in a friendly, supportive team that encourages you and the company to grow as individuals, professionals, and teams.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Mentor your coworkers through code review, pair programming, team collaboration, and training to help improve our collective knowledge and best practices.</span></li>
</ul>
<h3 class=" text-white font-semibold text-lg mb-2">About you</h3>
<ul class=" text-base sm:text-lg marker:text-color list-inside list-disc text-gray-500 list-disc list-outside pl-3 mb-6">
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Works in North/South American time zones</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Preferably 7+ years of relevant experience.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">A track record of delivering performant and scalable distributed applications on cloud infrastructure in Golang.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">A collaborative mindset backed by excellent communication skills and a desire to help us make great decisions in an empathetic and respectful way.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Experience working with customers and applying a deep understanding of their needs to produce timely solutions to their real-world problems.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">A solid understanding of scalability problems and experience building out performant distributed applications on cloud infrastructure.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Comfort working in UNIX environments and applying modern collaborative development practices.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Experience in working with RDB systems, preferably MySQL.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Ability to deliver high-quality solutions quickly and without mentorship.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Experience working within a distributed company is preferred.</span></li>
</ul>
<h3 class=" text-white font-semibold text-lg mb-2">About <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a></h3>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Our mission at <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> is to power automated communication that people like to receive. Today over 7,100 internet businesses use <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> to manage, send, and track the performance of emails, SMS, push notifications, and in-app messages. Unlike typical marketing platforms, <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> helps businesses increase relevance by using behavioral data: what people do or don’t do when logged in to a web or mobile app.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">We are offering a starting salary of $160,000 – $184,000 USD (or equivalent in local currency) depending on experience and subject to market rate adjustment.</p>
<h3 class=" text-white font-semibold text-lg mb-2">Benefits at <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> include:</h3>
<ul class=" text-base sm:text-lg marker:text-color list-inside list-disc text-gray-500 list-disc list-outside pl-3 mb-6">
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Unlimited PTO – we encourage at least 20 vacation days (in addition to holidays and sick days) so that you can unwind, unplug, and recharge</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">16 weeks paid parental leave (including adoption and foster care)</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">100% paid insurance premiums for you and your dependents</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">401k retirement matching – up to 5% dollar-for-dollar match to retirement contributions</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">$1,500 annual healthy lifestyle budget (for gym memberships, classes, fitness equipment)</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">$250/monthly Remote Work Stipend to be used for home internet, cell phone, and other miscellaneous remote work costs</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">$300/month co-working space rental reimbursement</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">$2,000/yearly professional education budget for conferences, courses, workshops, books, etc.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">$1,500 home office budget to make sure your working space is ergonomic and just what you need to do your best work!</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">One month sabbatical after five years at <a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a></span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">We also have opportunities to meet in person with your peers throughout the year</span></li>
</ul>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">All final candidates will be asked to complete a background check and employment verifications as part of our pre-employment process.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3"><a href="http://Customer.io" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Customer.io</a> recognizes the stifling impact of systemic injustice on diverse communities. We commit to using our influence to increase inclusion and equity within the tech industry. We strive to build an inclusive team culture, implement bias-free hiring practices, and develop community partnerships to expand our global impact.</p>
<h2><strong class=" font-semibold">Join us!</strong></h2>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Check out our <a href="https://customer.io/careers/" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">careers page</a> for more information about why you should <a href="https://customer.io/about/" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">come work with us!</a> We are passionate about our core values of Empathy, Transparency, Responsibility, and Awkwardness and are looking for new coworkers to share and build that passion!</p>
<h3 class=" text-white font-semibold text-lg mb-2">How to apply</h3>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Apply at the link below and tell us why you’re interested in the position! ****We plan to respond to all applicants with a status update about your application.</p>
<h3 class=" text-white font-semibold text-lg mb-2">Here’s what you can expect from our hiring process:</h3>
<ol>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">30 minute video call with a Recruiter</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">60 minute Technical Interview with two members of our engineering team</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Take Home Assignment</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">60 minute Assignment Review Call with two members of our engineering team</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Final Interview with Hiring Manager</span></li>
</ol>