(Senior) Platform Engineer (w/m/d)

SelectCode is building an AI platform that scales reliably—something most competitors fail at. As a Senior Platform Engineer, you'll own the architectural foundation that makes this possible, turning reliability, performance, and operational clarity into competitive advantages. You'll work proactively, reading system signals and acting before problems emerge.

What You'll Do

• Integrate AI products that process and move significantly more data per user action than typical SaaS applications, handling external sources and multi-system context in real time.
• Route streaming responses and LLM requests across providers with fallback and cost logic, ensuring correctness under real production load.
• Monitor system signals—latency distributions, cost curves, error rates—and take proactive action to prevent degradation.
• Apply architectural judgment to maintain system quality: introducing structure where needed while keeping designs simple and maintainable.

What We're Looking For

• 3+ years of backend engineering experience with proven ownership of production platform foundations.
• Strong system design skills; you reason clearly about performance, latency, and cost trade-offs.
• Proficiency in TypeScript and solid knowledge of PostgreSQL, APIs, queues, and caching.
• Hands-on experience with Docker and Kubernetes in production environments.
• Track record building observability and instrumentation to gather missing data and debug complex systems.
• Experience handling real-time context from multiple systems, streaming responses, and LLM request routing with fallback logic.
• Demonstrated ability to improve platform reliability and performance under production load.