Senior Go Developer (f/m/d) – Focus on gRPC & Enterprise Applications

You'd build the Natuvion Cloud Portal, the Go/gRPC platform at the center of the company. It's the cloud counterpart to our core products and the central access point nearly every team works through, used by our own people and our customers alike. A year old, already the strategic core, mostly greenfield, and growing fast. What to expect The work is varied, and the problems rarely repeat. One stretch you might be making multi-tenant queries fly across 100 GiB+ tables in DuckDB; the next, packing a couple dozen services into a single binary a customer can run on-prem, or building our AI firewall, deep-packet inspection for AI traffic that decides, per customer and per user, exactly which AI tools and MCP servers are allowed. It's the kind of fine-grained control that enterprises with sensitive data actually need and almost nobody has built. The stack is deliberately solid, though we'll reach for newer tools where the benefit is substantial. Go and gRPC throughout, with Google's AIPs as a strict ruleset so our APIs stay compatible as the platform grows. We run on AWS/EKS and on-prem with no vendor lock-in, backed by PostgreSQL, RabbitMQ, Redis, OpenSearch and a Grafana/Loki/Mimir/Jaeger stack, all shipped through GitHub Actions. Authorization is one such case: the platform's entire authz system is built on SpiceDB/Zanzibar, newer and less battle-tested, but exactly the right tool for the job. There's a dedicated SRE team, but you build it, you run it. You'd join four backend engineers, a flat team with a hands-on technical lead, and we're hiring across backend and frontend to keep up. Your Responsibilities : Design and build the gRPC services at the heart of the Cloud Portal, APIs that other teams depend on and that must stay compatible as the platform grows Take services end to end: design, ship, and run them in production, across both cloud and on-prem Solve the performance and scaling problems that come with multi-tenant systems and large datasets Help shape architecture and technical direction, where your input genuinely moves things in a team this small