Senior fullstack developer
In4MaticBelgium1 day ago
Full-timeEngineering, Information Technology
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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
Required
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
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
- Experience with GenAI-driven or AI-enabled applications
- English: professional working proficiency
- Dutch: professional working proficiency
Key Skills
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