Gilles Crofils

Gilles Crofils

Hands-On Chief Technology Officer

Tech leader who transforms ambitious ideas into sustainable businesses. Successfully led digital transformations for global companies while building ventures that prioritize human connection over pure tech.1974 Birth.
1984 Delved into coding.
1999 Failed my First Startup in Science Popularization.
2010 Co-founded an IT Services Company in Paris/Beijing.
2017 Led a Transformation Plan for SwitchUp in Berlin.
November 2025 Launched Nook.coach. Where conversations shape healthier habits

Avoiding hidden pitfalls as a tech freelancer in Europe

Abstract:

The article provides a comprehensive guide for tech professionals aiming to work independently across Europe, emphasizing that while the freedom of freelancing is appealing, there are often overlooked legal and administrative requirements that can lead to costly surprises. It highlights common pitfalls such as failing to properly register with local authorities, misunderstanding tax residency when moving between countries, missing health or pension enrollment deadlines, and not being aware of local insurance or social security obligations, each illustrated with real-world examples like freelancers facing fines or double taxation after cross-border moves. The article also details risks around intellectual property—where work created during previous employment or overlapping with past projects can lead to disputes—and the limitations of standard insurance policies, which may not cover work in different countries or for specific remote activities. Challenges with digital paperwork, such as incompatible e-signatures across borders, are addressed, along with solutions like using trusted platforms and secure, GDPR-compliant storage. To help avoid these issues, the article recommends self-audits with digital tools and expert checklists, regular reviews of contracts and compliance documents, and consulting resources like Freelancers Union Europe or the European Commission’s Your Europe Portal. By sharing practical tips and specific anecdotes, the article aims to help tech independents proactively manage their legal, tax, insurance, and intellectual property affairs, ensuring smoother, stress-free work experiences across Europe.

Becoming independent in tech: my day-one legal checklist

When I left my corporate job in Berlin to go solo, I thought the hardest part would be finding clients. Turns out, the real headache was the paperwork—especially on day one. I remember sitting in my tiny Lisbon flat, laptop open, convinced I could just sign up on a freelance platform and start working. Spoiler: I was wrong. There are a few admin steps you can’t skip if you want to avoid fines, lost contracts, or those random bills that show up months later.

If you’re about to make the leap, here’s the day-one legal and admin checklist I wish I’d had—plus a few stories from my own bumpy ride.

The day-one essentials

Choose the right business structure

The first thing I had to decide was what kind of business to register. In Germany, I went with the “Freiberufler” status, which was pretty straightforward for tech work. But when I moved to Portugal, I learned that registering as an “ENI” (sole proprietor) could be done online in under an hour. Sounds easy, right? But here’s the kicker: if you forget to notify social security within 90 days, you get slapped with a €50 monthly penalty. I almost missed that deadline—only a reminder from a local friend saved me.

Tip: Before you do anything else, check what business types are available in your new country. Some, like the Portuguese ENI, are fast and cheap. Others, like the German GmbH, need more paperwork and upfront cash. Don’t just copy what your friends did—read the fine print.

Register with the authorities (not just online platforms)

I made the rookie mistake of thinking that signing up on Upwork or Malt was enough. Nope. In both Berlin and Lisbon, I had to register with the local tax office and, in Portugal, with the social security system too. Missing this step can mean fines or, worse, contracts that aren’t legally enforceable. In France, for example, not declaring your freelance work can lead to penalties that make your first invoice look tiny.

Fact: In Germany, freelancing without registration can bring fines from €500. In Portugal, the process is digital but the penalties for missing deadlines are real.

Draft your first client contract

My first client was a startup in Paris. I was so eager to get started that I skipped the contract and just sent an invoice. Big mistake. When they delayed payment, I had no leverage. Now, I always use a simple contract—even if it’s just a template from Rocket Lawyer or Lexoo. Make sure it covers payment terms, intellectual property, and what happens if the project gets delayed or canceled.

Personal tip: If you’re working across borders, double-check which country’s law applies. I once had a contract in China that was basically useless in Germany. Lesson learned: always specify the governing law and jurisdiction.

Secure basic insurance

I used to think insurance was just for big companies. Then I got sick in Lisbon and discovered my German health insurance didn’t cover me for long-term stays. The European Health Insurance Card only works for short trips or emergencies. I ended up paying out of pocket for a doctor’s visit—ouch. Now, I always check if my health and professional liability insurance cover remote work in other countries.

Fact: Many standard policies quietly exclude work outside your home country. If you’re planning to travel, look for digital nomad insurance or ask your insurer directly.

Open a business bank account

This one sounds boring, but it’s a lifesaver. Mixing personal and business money is a recipe for tax trouble. In Portugal, opening a business account was surprisingly quick with online banks like Qonto. In Germany, it took a bit longer, but having a separate account made bookkeeping (and tax season) way less stressful.

Set up bookkeeping and invoicing

I’m not a numbers person, so I use tools like Toggl and Qonto to track time and payments. In Germany, invoices need specific info (like your tax number and the client’s address), and in Portugal, you have to issue “faturas” through the government portal. Missing these details can mean rejected invoices or tax headaches later.

Self-audit for gaps

After my first year, I realized I’d missed a few things—like updating my tax residence after moving. Now, I run a quick self-audit every time I change countries or take on a new type of client. I use checklists from the European Small Business Portal and tools like Rocket Lawyer to make sure I’m not missing anything obvious.

The emotional side: stress, freedom, and the admin blues

I won’t lie—handling all this alone was overwhelming at first. There were days I missed the corporate HR team (and the free coffee). The fear of missing a deadline or getting a surprise tax bill kept me up at night. But once I got through the first round of registrations and contracts, I felt a real sense of freedom. No more waiting for approvals or asking permission to work from a café in Porto.

Still, the isolation can get to you. If you’re used to a team, suddenly being your own admin, accountant, and legal department is a shock. I found that joining local freelancer groups (like VGSD in Germany or Slack channels in Lisbon) helped a lot—just having someone to ask “Is this normal?” made a difference for my mental health.

My day-one checklist (learned the hard way)

Here’s my personal, battle-tested list for anyone going independent in Europe:

  • Choose your business structure (Freiberufler, ENI, etc.) and read the local rules
  • Register with tax and social security authorities—don’t rely on freelance platforms
  • Draft a basic client contract (covering payment, IP, and governing law)
  • Get health and professional insurance that covers where you’ll actually work
  • Open a business bank account (separate from your personal one)
  • Set up bookkeeping and invoicing tools that meet local requirements
  • Run a self-audit using expert checklists (European Small Business Portal, Your Europe, VGSD, IPSE)
  • Find a local freelancer group or online community for support

Final thoughts

Going independent in tech is exciting, but the admin side can sneak up on you. I’ve made almost every mistake in the book—missed registrations, bad contracts, insurance gaps—and paid for it in stress and lost money. But getting these basics right on day one makes everything else easier. You’ll have more time for real work, more peace of mind, and maybe even a little more sleep.

If you’re about to take the leap, trust me: do the boring paperwork first. Your future self (and your bank account) will thank you.

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SwitchUp Logo

SwitchUp
SwitchUp is dedicated to creating a smart assistant designed to oversee customer energy contracts, consistently searching the market for better offers.

In 2017, I joined the company to lead a transformation plan towards a scalable solution. Since then, the company has grown to manage 200,000 regular customers, with the capacity to optimize up to 30,000 plans each month.Role:
In my role as Hands-On CTO, I:
- Architected a future-proof microservices-based solution.
- Developed and championed a multi-year roadmap for tech development.
- Built and managed a high-performing engineering team.
- Contributed directly to maintaining and evolving the legacy system for optimal performance.
Challenges:
Balancing short-term needs with long-term vision was crucial for this rapidly scaling business. Resource constraints demanded strategic prioritization. Addressing urgent requirements like launching new collaborations quickly could compromise long-term architectural stability and scalability, potentially hindering future integration and codebase sustainability.
Technologies:
Proficient in Ruby (versions 2 and 3), Ruby on Rails (versions 4 to 7), AWS, Heroku, Redis, Tailwind CSS, JWT, and implementing microservices architectures.

Arik Meyer's Endorsement of Gilles Crofils
Second Bureau Logo

Second Bureau
Second Bureau was a French company that I founded with a partner experienced in the e-retail.
Rooted in agile methods, we assisted our clients in making or optimizing their internet presence - e-commerce, m-commerce and social marketing. Our multicultural teams located in Beijing and Paris supported French companies in their ventures into the Chinese market

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