Senior Software Engineer

<h1><span style="font-size: 14pt; font-family: helvetica, arial, sans-serif;"><strong>About Upsun (formerly Platform.sh) </strong></span></h1> <p><span style="font-size: 12pt;">Upsun is the cloud application platform humans and robots love. It is built for today’s hybrid teams, where AI agents write and test code and humans focus on solving the problems that really matter. Developers, DevOps engineers, and platform teams use Upsun to build, ship, and scale confidently without wrestling with backend infrastructure. We give you your time back. You get:</span></p> <ul> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Predictable performance, even at scale </span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Secure, compliant environments by default </span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Real-time observability and profiling built in </span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">Cloning, configuration, and provisioning in seconds </span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;">AI-ready features that plug directly into your stack </span></li> </ul> <p><span style="font-size: 12pt;">The name says it all. "Up" means uptime, reliability, and acceleration. "Sun" reflects our follow-the-sun-support, a 24x7, globally distributed support team keeping the lights on while you rest. Our core belief is that software should power brighter solutions and greater innovation. </span></p> <p><span style="font-size: 12pt;">Upsunners are a remote, global workforce, and we thrive in a multicultural team. We are committed to open source and an open, welcoming environment. Our team spans the globe and the experience spectrum. </span></p> <p><span style="font-size: 12pt;">What's our commonality, our cultural fabric? A curious spirit and a thirst for knowledge; an eagerness for innovative ideas and cultures. We believe we can build anything together in an environment that frees you to do your best work. </span></p> <p><span style="font-size: 12pt;">Our values: </span></p> <p><span style="font-size: 12pt;">🌿 We make a positive impact.</span></p> <p><span style="font-size: 12pt;">✨ We aim for the stars.</span></p> <p><span style="font-size: 12pt;">💚 We care for each other. </span></p> <h1><span style="font-size: 14pt; font-family: helvetica, arial, sans-serif;"><strong>Impact of a Senior Software Engineer</strong></span></h1> <p><span style="font-size: 12pt;">As a Senior Software Engineer at Upsun, you will design and build the backend services behind our customers' billing, and help the engineers around you do their best work. Billing is your main focus: invoices, taxes, usage reporting, and the integrations that connect our platform to the commercial systems behind it. </span></p> <p><span style="font-size: 12pt;">You will own complex components end to end, make the design decisions behind them, and spot where they can be improved. Working closely with Finance, Product, and Support, you will turn commercial requirements into reliable services. This is a hands-on role: most of your time goes into designing and writing code that customers rely on every time they're billed.</span></p> <h1><span style="font-size: 14pt; font-family: helvetica, arial, sans-serif;"><strong>What to expect</strong></span></h1> <ul> <li style="font-size: 12pt;"> <p><span style="font-size: 12pt;"><strong>Design and build billing services:</strong> Design, build, and maintain backend services and API integrations in Go that connect our platform to external billing systems.</span></p> </li> <li style="font-size: 12pt;"> <p><span style="font-size: 12pt;"><strong>Own complex features end to end:</strong> Lead the design and delivery of usage-based billing features such as usage aggregation, estimates, usage alerts, and invoicing, from technical design to production.</span></p> </li> <li style="font-size: 12pt;"> <p><span style="font-size: 12pt;"><strong>Make sound design decisions:</strong> Shape the architecture of the components you own, weigh trade-offs, and balance short-term delivery with long-term reliability.</span></p> </li> <li style="font-size: 12pt;"> <p><span style="font-size: 12pt;"><strong>Solve hard problems:</strong> Troubleshoot complex issues across distributed services and external APIs, and fix root causes, not just symptoms.</span></p> </li> <li style="font-size: 12pt;"> <p><span style="font-size: 12pt;"><strong>Improve what you own:</strong> Spot gaps in reliability, security, observability, or process within your area, then propose and deliver practical fixes.</span></p> </li> <li style="font-size: 12pt;"> <p><span style="font-size: 12pt;"><strong>Protect customers and data:</strong> Contribute to anti-abuse measures and apply security best practices to sensitive customer and payment data.</span></p> </li> <li style="font-size: 12pt;"> <p><span style="font-size: 12pt;"><strong>Mentor and review:</strong> Support other engineers through code review, pairing, and mentoring, and help keep the bar for quality high.</span></p> </li> <li style="font-size: 12pt;"> <p>