Freelance Software Engineer

Stijn Haers.

Belgian software engineer with 14+ years of experience across test automation, Python systems, and embedded products. Now freelancing as Unfoxxed — available for teams that value craft, scale, and a calm head.

About

Engineer first.
Pragmatic always.

I'm a freelance software engineer based in Belgium, working under Unfoxxed. Master in Industrial Engineering (Electronics-ICT) and over a decade in the field — from embedded healthcare systems to large-scale test automation.

Right now I'm working on an EGSE system that supports the testing of space instruments. Before that, I led a small team at a global HVAC manufacturer, building the test framework that tied their product lineup together — a codebase that scaled from a handful of setups to dozens of products without losing its footing. And further back, I built mobile and Python systems for hospital and elderly-care alarms, where reliability isn't optional.

I'm at my best on problems that need a senior who can both code and lead — designing for scale, untangling inherited complexity, and helping teams ship without burning out.

What energises me is work that makes someone's life tangibly better — smoother teams, cleaner workflows, features people actually use. The more concrete the impact, the better.

How I work

A few things I care about.

Pragmatic

The best technical solution isn't always the right one. The end user wins, not the architecture diagram.

Team-first

Good products come from good teams. I'd rather sharpen a team than be the lone hero.

Big picture

I want to know what we're building and why before diving in. Solving the right problem beats solving any problem well.

What I do

Focused engagements.
No filler.

01 / Quality

Test automation & frameworks

Building and scaling test frameworks that actually get used — readable test plans, maintainable suites, and the tooling that keeps engineers and testers on the same page.

02 / Build

Python systems & integrations

Backends, APIs, automation, and device glue. Eight-plus years of Python in production, on Linux, in containers, and on small hardware where it matters.

03 / Lead

Tech lead & architecture

Guiding small teams (3–5 people) through scale-up phases — turning patches into architecture, unblocking the day-to-day, and growing engineers while shipping.

Stack

Tools I reach for.

Primary language

Python

Day-to-day for the last 8+ years.

Tooling & platforms

Linux Git GitLab Jenkins Ansible MQTT ROS Robot Framework

Ways of working

Agile Scrum Jira Hybrid (remote + on-site)
Contact

Let's build
something good.