At Sytac , we build high-performing engineering teams for leading organizations in the Netherlands and beyond. We combine a pragmatic, people-first culture with strong technical craftsmanship — giving engineers autonomy in real production environments, backed by a consultancy that invests in growth, community, and long-term partnerships.
Is dit de volgende stap in uw carrière? Ontdek of u de juiste kandidaat bent door het volledige overzicht hieronder te lezen.For one of our highly regulated, technology-driven clients in the financial services domain, we’re looking for a Senior Full Stack Developer to strengthen a core engineering team. You’ll work on complex, business-critical applications with a strong focus on backend development, integrations, and platform reliability.
This is a hands‑on engineering role — not a lead or management position.
What you’ll do- Design, build, and maintain backend services using Go (Golang)
- Develop and maintain frontend components using React & TypeScript
- Build integrations between internal platforms and applications
- Contribute to containerized application development using Docker
- Take ownership of services in production (build & run mindset)
- Write clean, testable code with a strong focus on stability and quality
- Collaborate closely within an agile, cross-functional team
- Actively contribute to code quality, documentation, and engineering standards
- Strong backend development experience, preferably with Go (Golang)
- Solid frontend experience with React and TypeScript
- Experience working with Python
- Hands‑on experience with Docker and modern application development
- Understanding of IT security fundamentals
- Comfortable writing unit tests and building reliable software
- Hands‑on experience with most of: GitHub Actions , Jenkins , Docker , npm, skaffold, helm
- Able to work independently within an existing toolchain
- Comfortable owning applications end-to-end in production
- Strong analytical and problem-solving skills
- Truly hands‑on developer (no lead/manager profile)
- Comfortable joining and contributing to an existing, complex codebase
- High sense of integrity and personal responsibility
- Curious mindset, continuously learning and adapting
- Team player: empathetic, collaborative, and open to diverse perspectives
- Feels at home in an agile environment and leads by example through code quality xgiwjmb
- Office presence: ~60% onsite
- Way of working: Agile team
- Focus: Backend-heavy full-stack development & integrations
- High-impact role on business-critical platforms
- Hybrid working setup in Amsterdam
- Competitive salary or freelance rate
- Strong engineering culture focused on ownership, quality, and craftsmanship
- Long-term collaboration with room for growth and learning
- Mid‑Senior level
- Full-time
- Consulting, Information Technology, and Business Development
- Software Development, IT Services and IT Consulting, and IT System Custom Software Development
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