Jonas Marien
Currently active in Payroll
Freelance Software Engineer
Building business-critical .NET and Angular applications on Azure, with a strong focus on maintainability and pragmatic trade-offs.
Contributions
2025
2026
Teal Partners - Payroll
Actief Interim — A best-of-breed digital backbone for one of Belgium's top staffing agencies. Custom cloud portals connect consultants, clients, and candidates seamlessly, while middleware ties their SaaS tools together and integrated reporting turns data into clear business insight.
Buddy (SD Worx) — A modular Core HR & Payroll platform that puts employees in control of their own data, leave, and documents, while giving employers a single, clear view to manage contracts, compensation, and assets across multiple countries.
Teal Partners
2024
2025
KION Group - Warehouse visualization
An advanced tool for real-time warehouse visualization, stackportal monitors vehicle movements and locations with precision. It delivers a clear, interactive map of your facility, showing stock locations and tracking activities seamlessly. Whether a forklift is moving between points or tasks are being executed, stackportal ensures you have instant insights into warehouse operations.
KION Group
2023
Protime - Workforce Management
myProtime is a software suite for workforce management that provides tools for time registration, leave management, and scheduling. It features an interface designed for usability and supports mobile accessibility. The suite helps manage administrative tasks efficiently and accommodates flexible work environments.
Protime
About
I’m Jonas - an experienced Freelance Full Stack Software Developer from Antwerp
Hey there! I’m Jonas, a freelance software engineer and IT consultant based in Antwerp. With over 5 years of experience, I specialize in creating intuitive and impactful digital solutions that solve complex problems. My expertise includes C#, .NET, TypeScript, Angular, and more — helping turn ideas into seamless user experiences.
From developing warehouse visualization tools to building financial planning systems, I thrive on delivering solutions that exceed expectations. Whether it’s designing responsive applications, optimizing performance, or integrating with modern APIs, I focus on your goals to ensure the end result aligns with your vision.
Inspired by innovation and driven by precision, I’m ready to collaborate and bring your next project to life!
Work Experience
.NET C#
Angular
2025 - 2026
.NET C#
Angular
2024
2020 - 2024
Azure Cloud
Dapr
Orleans
2023
.NET C#
Design Patterns
2023
TDD
React
.NET C#
2022
Azure Cloud
React
.NET C#
2020 - 2022
Skills
Here, I showcase the technologies I work with and the programming languages I master. From C# to JavaScript, each skill contributes to the mosaic of my professional expertise.
.NET
C#
SQL
TypeScript
Angular
React
Azure DevOps
CI/CD
Test-Driven Development
SCRUM
Kanban
Design Patterns
Azure Cloud Services
