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In4Matic

Senior fullstack developer

In4Matic
Belgium · Full-time · Mid-Senior
We’re looking for a Full-Stack Developer to join our client’s team.

Our client is building the foundations for next-generation GenAI solutions that enable advanced reasoning, agent-driven workflows, and secure data access across multiple sources. You’ll work in a multidisciplinary environment with designers and analysts to deliver robust tools that help the business get maximum value from a cutting-edge GenAI platform.

Attention: this is a payroll-only function (you will be on the payroll of In4Matic) - not open to freelancers!

The Role

As a Full-Stack Developer, you’ll take ownership of implementing and maintaining a modern GenAI application across the full stack. This includes a web-based frontend, a .NET middle layer, and a Python-based backend. You’ll play a key role in shaping scalable, secure, and high-performance solutions while collaborating closely with technical and non-technical stakeholders.

Responsibilities

  • Design, implement, and maintain modern frontend and backend components
  • Build responsive, accessible UI components aligned with current web standards and best practices
  • Design, develop, and optimize APIs with a strong focus on performance and security
  • Integrate cloud services and third-party systems within a broader application ecosystem
  • Ensure ongoing support, maintenance, and continuous improvement of the full-stack application
  • Apply sound software engineering principles, including security, testing, and maintainability


Profile - The Ideal Candidate

Required

  • 5+ years of experience in a full-stack role, with clear ownership of frontend development
  • Strong skills in HTML, CSS, TypeScript (e.g. React, Svelte), .NET, Python (FastAPI), SQL, and PostgreSQL
  • Working knowledge of cloud platforms, particularly Azure-based services
  • Experience designing and consuming RESTful APIs and integrating external data sources
  • Solid understanding of security concepts (e.g. OAuth2), performance optimization, and design patterns
  • Familiarity with version control, DevOps practices, and CI/CD pipelines
  • Strong analytical thinking, problem-solving abilities, and communication skills


Nice to Have

  • Experience with GenAI-driven or AI-enabled applications


Languages

  • English: professional working proficiency
  • Dutch: professional working proficiency

Key Skills

Ranked by relevance

payroll python cloud restful apis typescript responsive fastapi devops svelte react cicd css sql ai ui
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Country Guide

Belgium

International hub for EU careers

Posted
Jan 09, 2026
Type
Full-time
Level
Mid-Senior
Location
Herentals
Company
In4Matic

Industries

IT Services IT Consulting

Categories

Engineering Information Technology

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