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# Senior Software Engineer

- **Company:** Haystack People
- **Location:** Amsterdam, Netherlands (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Software as a Service, Continuous Integration, Github, Python (Programming Language), Redis, WebSocket, Workflow Management Systems, Flask (Web Framework), Large Language Models, Backend, Fastapi, Front End Software Development, Restful APIs, Automation Anywhere, Docker
- **Published:** October 27, 2026
- **Apply:** https://www.werk.nl/nl/vacatures/71956843

## 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 authorization Terms of Employment -

## Description

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 -