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

Why my best money moves started with mindset not math

Abstract:

The article explores how personal mindset—shaped by optimism, sunk cost, social comparison, and cultural narratives—significantly influences credit and debt decisions, often more than rational analysis or financial spreadsheets, especially among tech founders and freelancers. Drawing on the author's experiences running businesses in Paris, Beijing, and Berlin, and navigating the challenges of volatile income, debt, and the pressures of entrepreneurship, the piece reveals that the real risks in money management stem from internal biases and unexamined habits rather than external market factors. The author shares personal anecdotes and examples from peers, such as falling into debt due to over-optimism or peer pressure, and highlights the emotional isolation that can come with solo work. Practical strategies are suggested, including using checklists, separating business and personal finances, setting borrowing limits, pausing before taking on new debt, and seeking peer or mentor support. Emotional resilience routines like journaling, mastermind groups, exercise, and grounding in core values are recommended, along with resources—books, podcasts, and online communities—to foster healthier financial habits. Ultimately, the article emphasizes that acknowledging and addressing the hidden stories and biases behind money choices is essential for making sound credit decisions and maintaining peace of mind as an independent professional.

Ever feel like your money choices come more from the head than the spreadsheet? Same here. I studied physics and ran companies in Paris, Beijing, and Berlin, and I still got tripped up by optimism, social pressure, and plain wishful thinking—especially when I took on debt as a founder or freelancer. Numbers show only half the story. The bigger battle is between ambition, fear, and the stories we repeat about cash.

I learned this lesson the hard way, juggling uneven income, culture shifts, and the push to keep up with other founders. The real risks were not in contracts or markets; they were hiding in my own mindset. If you have ever asked why smart people make shaky credit moves or feel lonely with money stress, you are in good company. Let’s get honest about these hidden habits and see how a few small tweaks can help.

Why mindset shapes our credit choices

Sneaky mental habits that trip us up

Even when we know the numbers, indie tech folks can slide into mental traps. It’s funny, we think we’re rational, but optimism, sunk cost, present bias, and comparing ourselves to other founders quietly steer the wheel. Spotting these tricks is the first step.

Optimism bias bites me often. I convince myself the next big idea will win, so I borrow more than feels safe. My physics background says trust the numbers, yet excitement still overrides logic.

Sunk cost is another trap. I kept pouring cash into projects. Walking away felt impossible once time and money were sunk. That move turned small cuts into big wounds.

Present bias shows up when income is jumpy. The urge to fix today’s gap knocks tomorrow’s pain out of sight. One small loan can snowball fast.

Finally, social comparison sneaks in. Seeing peers post wins online makes it tempting to borrow or risk more just to keep pace. These biases pack a punch, but one myth adds extra weight.

Is bootstrapping always a badge of honor?

Tech loves the story that true success comes from building everything alone. I felt it when launching companies in China and Paris. I refused outside help for years, thinking it proved strength. That stubborn pride led to stress and missed chances.

Bootstrapping can leave you underfunded and isolated. Using credit smartly can be the wiser play. It took time to ask, “Is my debt fear helping or blocking me?”

Unique hurdles for tech minimalists

The illusion of endless runway

Freelance income lands in bursts. I once blurred business and personal money, telling myself the runway was long. One dry month proved me wrong, and debt piled up fast. Mixing accounts and doing quick mental math caused those headaches. Once I separated accounts and tracked real cash flow, leaks showed up, and surprise debt faded.

Even with clean books, solo life has its own traps.

The emotional side of flying solo

I once stood at an ATM in Lisbon, card shaking in my hand as the screen flashed “Insufficient funds.” Working alone brings big highs and deep lows. Talking about debt feels taboo; I kept quiet far too long. No cofounder means no one to flag blind spots. Optimism slips into denial quickly.

What helped? Peer groups, online forums, and a mentor now and then. Regular chats made money talk normal, not shameful. My go-to moves:
- Peer support in Indie Hackers or similar spots
- A mentor or informal business buddy
- Small mastermind sessions for frank money talks

Support turns money stress into something shareable. Next, some stories where these traps hit hard.

Learning from real bias traps

When optimism and sunk cost collide

Sunk cost and optimism can mix into a storm. Justin Jackson once fell deep into credit card debt, sure the next project would save him. Change came only when he owned the bias and let friends challenge him.

Nathan Barry faced the same when he stuck with a failing project simply because of past effort. Letting go felt rough but freeing. I felt this too in Berlin and Beijing. Walking away is hard, yet growth often starts there.

The pressure to keep up

Social media turns each founder story into a highlight reel. In Berlin, everyone seemed to raise funds or scale overnight. That low-level FOMO pushed me toward risky moves. Pausing to ask what I truly wanted, not what looked shiny online, changed the game.

Even a bit of self-awareness lowers that peer pressure. When I check, “Is this my goal or just fitting in?” I choose better.

Simple ways to outsmart your own bias

Checking your money mindset before new debt is a must.

Let’s ground this in real numbers. Say you need €5,000 to bridge a 12-month cash gap. A line of credit at an 8% effective annual rate means monthly payments of about €434, with total interest near €220 over the year. A credit card advance at 16% APR, paid off in 12 equal installments, costs roughly €456 per month and racks up about €470 in interest. That’s more than double the cost. Knowing these break-even points makes it easier to pause before picking the “easy” option.

Checking your money mindset before new debt

First stop is a self-check. Tools like the FinaMetrica risk quiz or the Money Scripts Inventory show how much risk feels right and reveal hidden beliefs. Written checklists from SCORE or the SBA slow me down and catch over-optimism.

After painful mistakes, I made checklists a habit. That short pause pays for itself every time.

  • Is optimism, sunk cost, or peer pressure creeping in?
  • What is my real risk comfort?
  • Do I have fresh financial docs and cash flow?
  • Has a peer or mentor reviewed the plan?
  • Am I calm or rushed?

Here’s a quick 3-step framework before borrowing:
1. Forecast the next 90 days of cash-in and cash-out in a spreadsheet.
2. If the forecast dips below zero, size the smallest borrowing amount that restores a 30-day buffer.
3. Compare the cost of a credit card, overdraft, and personal line of credit using the same principal amount.

Putting pause points and accountability to work

A pause point is a simple rule: sleep on any new credit idea. A calendar reminder or checklist step breaks impulsive moves.

Outside accountability helps even more. A quick chat with a founder friend or mentor often spots what I miss. Saying logic out loud can show cracks instantly.

Building emotional resilience for indie tech founders

Practical routines for less debt stress

Regular expense tracking and a simple cash flow view keep me calm. Separating business and personal accounts cleared the fog. Deciding, in calm moments, the absolute ceiling you’re willing to borrow helps avoid “just a bit more” moments. I stick to these habits:
- Set a borrowing cap you won’t cross, even when tempted by hype
- Review limits each quarter, but only if your financial picture changes significantly
- Keep business and personal finances separate to spot leaks early

Mental fuel matters too. I rely on mastermind calls, exercise, and time outdoors. Gardening resets my head after a tough week.

Keeping self-worth separate from setbacks

As a solo founder, wins and losses can feel personal. A trick from cognitive work helps: list what I learned, not just what I lost. Weekly journaling with questions like “What went fine? What will I tweak?” keeps bumps small.

Naming core values such as curiosity, learning, and independence also grounds me when numbers wobble.

Tools and resources for a resilient money mindset

Self-checklist for smarter borrowing

Before any loan I ask:
- Is optimism, sunk cost, or peer pressure creeping in?
- What is my real risk comfort?
- Do I have fresh financial docs and cash flow?
- Has a peer or mentor reviewed the plan?
- Am I calm or rushed?

Books, podcasts, and communities that keep me sharp

Books that shifted my view:
- Mind Over Money – explores odd money habits and fixes
- The Psychology of Money – shows how beliefs guide outcomes
- Your Money or Your Life – a classic for freelancers wanting a healthier cash link

Podcasts for steady ideas:
- The Financial Therapy Podcast – covers the feelings side of money
- Freelance Friday – blends money tips and mindset chat
- So Money – talks that go past numbers into real motives

Communities for accountability:
- r/personalfinance – straight peer advice
- Freelancers’ Union – support for indie pros
- Bogleheads Forum – evidence-based money talk

With these tools, routines, and solid friends, I keep my mindset sharp and credit choices steady, even when life swings.

Getting honest about money stories is tough, yet that’s where change starts. The biggest risks sit in our heads, shaped by optimism, sunk cost, and the urge to match others. Small moves like pausing before debt, using checklists, and leaning on peers turn shaky choices into solid ones. Separating accounts, setting clear limits, and keeping regular check-ins all bring peace of mind. Credit decisions then become one part of the journey, not a verdict on worth. Hidden money stories never disappear, but naming them is the first step to steering instead of drifting.

You might be interested by these articles:


25 Years in IT: A Journey of Expertise

2025-

Nook
(Lisbon/Remote)

Product Lead
Building the future of health coaching. Leading product development and go-to-market strategy for a platform that makes personal wellness accessible through natural dialogue.
Making health coaching feel like talking to a friend who actually gets you.

2024-

My Own Adventures
(Lisbon/Remote)

AI Enthusiast & Explorer
As Head of My Own Adventures, I’ve delved into AI, not just as a hobby but as a full-blown quest. I’ve led ambitious personal projects, challenged the frontiers of my own curiosity, and explored the vast realms of machine learning. No deadlines or stress—just the occasional existential crisis about AI taking over the world.

2017 - 2023

SwitchUp
(Berlin/Remote)

Hands-On Chief Technology Officer
For this rapidly growing startup, established in 2014 and focused on developing a smart assistant for managing energy subscription plans, I led a transformative initiative to shift from a monolithic Rails application to a scalable, high-load architecture based on microservices.
More...

2010 - 2017

Second Bureau
(Beijing/Paris)

CTO / Managing Director Asia
I played a pivotal role as a CTO and Managing director of this IT Services company, where we specialized in assisting local, state-owned, and international companies in crafting and implementing their digital marketing strategies. I hired and managed a team of 17 engineers.
More...

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

Cancel

Thank you !

Disclaimer: AI-Generated Content for Experimental Purposes Only

Please be aware that the articles published on this blog are created using artificial intelligence technologies, specifically OpenAI, Gemini and MistralAI, and are meant purely for experimental purposes.These articles do not represent my personal opinions, beliefs, or viewpoints, nor do they reflect the perspectives of any individuals involved in the creation or management of this blog.

The content produced by the AI is a result of machine learning algorithms and is not based on personal experiences, human insights, or the latest real-world information. It is important for readers to understand that the AI-generated content may not accurately represent facts, current events, or realistic scenarios.The purpose of this AI-generated content is to explore the capabilities and limitations of machine learning in content creation. It should not be used as a source for factual information or as a basis for forming opinions on any subject matter. We encourage readers to seek information from reliable, human-authored sources for any important or decision-influencing purposes.Use of this AI-generated content is at your own risk, and the platform assumes no responsibility for any misconceptions, errors, or reliance on the information provided herein.

Alt Text

Body