About Upsun About Upsun (formerly Platform.Sh) 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: Predictable performance, even at scale Secure, compliant environments by default Real-time observability and profiling built in Cloning, configuration, and provisioning in seconds AI-ready features that plug directly into your stack 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. Upsunners are a remote, general 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. 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. Our values: We make a positive impact. We aim for the stars. We care for each other.
Impact of a Senior Software Engineer 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. 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.
What to expect Design and build billing services: Design, build, and maintain backend services and API integrations in Go that connect our platform to external billing systems.
Own complex features end to end: Lead the design and delivery of usage-based billing features such as usage aggregation, estimates, usage alerts, and invoicing, from technical design to production.
Make sound design decisions: Shape the architecture of the components you own, weigh trade-offs, and balance short-term delivery with long-term reliability.
Solve hard problems: Troubleshoot complex issues across distributed services and external APIs, and fix root causes, not just symptoms.
Improve what you own: Spot gaps in reliability, security, observability, or process within your area, then propose and deliver practical fixes.
Protect customers and data: Contribute to anti-abuse measures and apply security best practices to sensitive customer and

📌 Senior Software Engineer At Platform.Sh (Santiago de Compostela)
🏢 Platform.sh
📍 Santiago de Compostela