Service

Hire a freelance developer

You have an existing system that needs further development, optimization or expansion. But you don't want to wait for an agency or a long onboarding period. I am quickly deployable, think along strategically and deliver value directly on an hourly or project basis.

Currently available for new assignments
Freelance Software Developer Marissa Coorengel

What can you hire me for?

From a small bugfix to complete refactoring, I adapt to your situation and priorities.

Continued development of an existing web application or platform
Refactoring of outdated or unreadable codebases
Performance optimization of slow systems
Database migrations (on-premise to cloud)
Implementation of CI/CD pipelines in Azure DevOps or GitHub Actions
Adding new modules to existing software
Technical code reviews and architecture advice
Solving complex bugs

How I work

Transparent, predictable and without surprises. So you always know where you stand.

01

Technical Intake

I get to know your codebase, architecture and pain points. Without judgment — every system has a history.

02

Prioritization

Not everything can be done at once. We decide together what has the biggest impact and tackle that first.

03

Iterative Improvement

I work in short cycles so you see results quickly. No month-long trajectories before you notice anything.

04

Documentation & Handover

Everything I build or adapt is clearly documented. No black boxes.

My technical expertise

I work with modern, common technologies that line up with existing developer teams and workflows.

Git & GitHub / GitLab
Azure DevOps & CI/CD
PostgreSQL / MongoDB migraties
Python & Django
Next.js & React
Docker & containerisatie

Flexible high-level reinforcement

As a freelance developer, I offer the flexibility needed to quickly get projects moving or strengthen teams in a targeted way. You pay for high-quality expertise and actual results, without the delay of complex corporate structures or lengthy onboarding.

I am available for both short- and long-term projects, from an intensive sprint to deliver a critical feature to a structural role as a permanent external force in your team. I work seamlessly with your own developers, both remote and on-site.

My strength lies in quickly understanding existing codebases and proactively suggesting improvements. I ask the right questions, make no assumptions and communicate clearly about progress. This makes me a valuable addition for your technical challenges from day one.

Looking for an experienced software engineer?

Tell me about your project or assignment. I respond within one business day and I'm happy to schedule a meeting.