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# Senior Software Engineer

- **Company:** Haystack People
- **Location:** Zwanenburg, Netherlands (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Software as a Service, Continuous Integration, Github, Python (Programming Language), Redis, WebSocket, Flask (Web Framework), Delivery Pipeline, Large Language Models, Backend, Fastapi, Front End Software Development, Automation Anywhere, Docker
- **Published:** October 27, 2026
- **Apply:** https://www.werk.nl/nl/vacatures/71958169

## About the Role

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 authorizationTERMS 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)
Daily team lunch, internal bootcamps and knowledge sharing
Long-term role with clear growth opportunities (e.g. Lead Engineer)
Important
We can only consider candidates who currently live in the Netherlands and hold a valid EU work permit. No visa sponsorship or relocationsupport available.Want to apply or explore first?EmailEmail d.gontha@haystackpeople.nl o...

## 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