Senior Fullstack Engineer (Go/TypeScript/React)

Senior Full Stack Developer

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.

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

What we’re looking for

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

Ways of working

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

Office presence:

~60% onsite

Way of working:

Agile team

Focus:

Backend-heavy full-stack development & integrations

What we offer

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

Seniority level

Mid‑Senior level

Employment type

Full-time

Job function

Consulting, Information Technology, and Business Development

Industries

Software Development, IT Services and IT Consulting, and IT System Custom Software Development

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