Senior Software Engineer

NL Senior Software Engineer (Python) - Build Scalable AI Platforms StartUp Amsterdam Vast 110k Build the backend of a fast-growing VC-backed SaaS platform. As a Python Backend Developer, you'll design scalable APIs, integrate LLM workflows, and power real-time infrastructure - all in a lean, product-focused engineering team. Bedrijfsprofiel Our client is a VC-backed SaaS scale-up based in the Netherlands. Their platform combines AI, automation, and workflow orchestration to support smarter decision-making across Europe. The tech team is compact and works fully in-house, with full ownership over architecture and product direction. The engineering culture is fast, pragmatic and collaborative. Work setup is hybrid: typically 2 days per week in-office (Randstad region). Job Description - Build and maintain scalable backends using Python (FastAPI or Flask) - Design APIs that power AI workflows and modular decision logic - Work with Redis and WebSockets to support real-time features - Improve testing, performance, and system security - Collaborate with product, frontend and fellow engineers - Contribute to architecture, deployment pipelines and monitoring Job Requirements - 5+ years of backend experience, preferably 3+ in a SaaS or product environment - Proficient in Python and familiar with modern API frameworks (FastAPI, Flask) - Hands-on experience with Redis, Docker, GitHub Actions or equivalent tools - Exposure to LLMs or AI integrations (or interest in working with them) - Broad technical knowledge across architecture, CI/CD, security and testing - Fluent in English; Dutch is a plus - Must be living in the Netherlands with valid EU work authorization Terms of Employment - Monthly salary: €5500 - €9000 gross + 8% holiday allowance - Equity via stock plan - MacBook Pro and home office setup budget - 25 vacation days + 2 additional personal days - Hybrid work model (office-first with flexibility) - Dail...