Gilles Crofils

Gilles Crofils

Hands-On Chief Technology Officer

Based in Western Europe, I'm a tech enthusiast with a track record of successfully leading digital projects for both local and global companies.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.
May 2025 Eager to Build the Next Milestone Together with You.

Turning tech puzzles into progress with C++ in Europe

Abstract:

The article explores the challenges and opportunities of developing embedded and edge technologies in Europe, emphasizing the region’s unique landscape shaped by fragmented markets, strict regulations, and a strong drive for sustainability and digital independence. It highlights real-world examples such as Bioserenity’s medical wearables, Voi’s IoT-enabled e-scooters, and GridX’s smart energy control, illustrating how sectors like healthcare, mobility, and energy are fueling rapid growth. The author shares personal experiences managing heavy administrative workloads, learning to treat compliance and funding applications as integral parts of the development process rather than obstacles. The article underscores the centrality of C++ in embedded projects due to its efficiency, control, and reliability, especially when compared to languages like Rust or Python, and details best practices for modular design, code safety, and cross-device compatibility. It also describes practical strategies for integrating cloud connectivity, running AI on edge devices, and building resilient teams through structured training and leveraging Europe’s innovation networks. Ultimately, the article conveys that success in Europe’s embedded and edge sectors relies on meticulous planning, adherence to compliance from the outset, and the disciplined use of proven technologies like C++, transforming a complex regulatory environment into an ecosystem where ambitious ideas can become robust products.

An abstract illustration in cool blue tones, visualizing the journey of building embedded and edge technology in Europe using C++. Imagine a complex, layered maze of interconnected puzzle pieces and circuit traces, symbolizing the challenges of compliance paperwork, cross-border funding, and technical hurdles. Within the maze, small, glowing C++ symbols pulse inside miniature devices—wearables, e-scooters, and smart energy boxes—scattered across a stylized European map. Threads of light connect these devices to cloud shapes and floating checkmarks, representing cloud integration and regulatory compliance. Subtle hints of hospital monitors, mobility icons, and energy grids emerge from the background. The overall mood is dynamic and optimistic, with gradients of blue suggesting digital innovation and the thrill of overcoming obstacles through structure and creativity.

Building new tech in Europe feels like working through many small puzzles at once. Energy, mobility, and healthcare all ask for faster and smarter ideas. Each step brings fresh paperwork and a stack of technical checks. IoT, robotics, and edge AI move ahead, pushed by the region’s focus on sustainability and digital independence. There’s a certain thrill in seeing a tiny device you coded in C++ running live in a hospital or city grid—especially when you know every byte and millisecond matters. Of course, that excitement comes with a side of pressure: every investor wants proof your tech is solid and your paperwork is in order.

Some days the workload is heavy. One hand fills funding forms, the other reviews compliance notes, and I still need to keep code clean and solid. Sometimes, the paperwork, it feels never-ending. It’s easy to get lost in a maze of rules and cross-border deals. Yet when the pieces fit, the payoff is real. By choosing the right tools and habits, I have turned many of these tasks from hurdles into routine. What follows is a set of lessons that keep my embedded and edge projects on track, from using C++ on tiny devices to making public support work without slowing the team.

The edge and embedded tech surge in Europe

Why Europe’s embedded and edge sectors are gaining ground

Across Europe, the embedded and edge scene shows real momentum. Sectors like IoT, robotics, and edge AI grow fast because energy, mobility, and healthcare keep asking for fresh answers. A strong push for sustainability and digital sovereignty shapes both government plans and startup pitches. This mix sets a high bar and creates space for bold ideas.

In fintech, C++ drives high-frequency trading engines where every microsecond counts, while in AI/ML, it powers inference engines for real-time analytics. I’ve seen firsthand how a few lines of optimized C++ can make the difference between winning and losing a contract—especially when the client is watching the clock (and the budget).

Here is what fuels the growth:

  • Healthcare: Wearable devices like France’s Bioserenity monitor patients in real time, while Finland’s Cardiolyse adds edge AI for heart data.
  • Mobility: Sweden’s Voi places IoT and edge modules inside e-scooters for live fleet control.
  • Energy: BeeBryte in France and GridX in Germany run edge devices that fine-tune climate systems and power grids.

I remember the first time I tried to coordinate a rollout across two countries—just getting everyone to agree on the same technical standards felt like herding cats. Europe’s strengths also bring scaling trouble. Markets stay split, and compliance differs by country.

Fragmented markets and scaling hurdles

Compared with North America or Asia-Pacific, Europe often feels divided. Funding rounds are smaller, and rules change from one border to the next. The result is many lively hubs but few giant ones.

  • Funding: Smaller average rounds than the US or Asia.
  • Deal volume: Healthy but spread across regions.
  • Startup density: Many mini hubs, not many super hubs.

Regs and funding—safety net or obstacle course?

Growing an embedded or edge business here can feel like running an obstacle course with soft landing mats. Public funding provides real help, yet the rulebook is thick. Regulation can protect a young company when handled early, or slow it when ignored. And if you miss a step, you’ll get awkward questions from investors who expect everything buttoned up.

Funding programs and compliance essentials

Making funding work for embedded and edge startups

Support exists at EU and national levels once you speak the right language. Programs such as Horizon Europe or the EIC Accelerator back projects that match themes like sustainability or cross-border teamwork.

When I pitched our embedded project in Berlin, I had to explain not just the tech, but how our C++ code met both German and French compliance standards—a real test of patience and paperwork.

To stand out I focus on:

  • Showing how the idea meets innovation and impact goals
  • Building partnerships across borders because consortia often win
  • Fitting the plan into program themes such as digital, green, or connected devices

Why compliance is the hidden deal-breaker

Skipping early compliance planning is risky. CE Marking, cybersecurity rules like EN 303 645, and environmental directives all appear sooner than many expect. If these items do not sit in the first prototype plan, launch stalls. Missing a compliance step can mean not just a delayed launch, but awkward investor meetings where you have to explain why you’re not on shelves yet.

Quick checklist for embedded and edge products:

  • CE Marking: Needed for legal sale
  • EN 303 645: Cybersecurity, especially for IoT
  • WEEE, RoHS: Environmental and hazardous materials

I once underestimated the time needed for CE Marking, which nearly delayed a product launch—now it’s always on my radar.

Compliance lessons from day one

At my first company in France, I learned that paperwork eats as much time as code. Treating forms, certifications, and technical docs like product features turned a constant worry into a steady task.

C++: My go-to for tricky hardware challenges

Getting close to hardware and squeezing out speed

Most teams still pick C++ for sensors, robots, and small machines because it talks almost directly to the hardware. I can decide where every byte goes and how fast each action runs. On devices that must work for years without a reboot, this control matters.

Small, predictable, and always on time

C++ lets me keep tiny program files and avoid midnight crashes on customer sites. It beats Java or Python when memory is tight and timing must stay strict.

  • C++: Fast, small, steady
  • Java or Python: Larger, slower, less predictable
  • C: Lean too but lacks modern features

Rust gets a lot of buzz for safety, and Python is great for quick experiments. Yet when code ships to hospitals or city grids, C++ still owns the job. Trust and proven tools tip the scale.

Real-world examples in Europe

  • Bioserenity and Cardiolyse use C++ for quick and reliable patient data.
  • Voi codes e-scooters with C++ for instant tracking and safety.
  • BeeBryte and GridX run smart control on edge devices with C++.

Modern C++ tricks for tiny systems

How to keep code safe and quick in small devices

Good habits count. I rely on RAII for cleanup and keep to static memory when possible. If dynamic memory is needed I use a simple unique_ptr. Features like constexpr move work to compile time, and I drop exceptions and RTTI to keep builds light. MISRA rules act as an extra guard.

Keeping things smooth when timing matters

For real-time needs I like FreeRTOS. Event-driven code, static pools, and lock-free queues keep response times short. Cooperative multitasking and fixed-capacity loops prevent race conditions and heap trouble.

I remember using Zephyr RTOS on a project for a French hospital—its built-in tracing tools helped us catch a nasty timing bug that would have been a nightmare to find otherwise.

Building for every device without headaches

Choosing the right tools for every hardware

GCC and Clang handle most chips I meet. CMake ties builds together, while PlatformIO gives quick multi-board setups. On one cross-border rollout, PlatformIO saved me hours—switching between hardware targets was as easy as changing a config file, even when the team was split between Paris and Munich.

Using frameworks and libraries to move faster

Zephyr RTOS covers real-time duties, Qt handles interfaces, and Boost plus OpenCV solve common problems so I can focus on product value. With OpenCV, I once added image processing to a prototype overnight—something that would have taken me days from scratch.

Organizing code that lasts and adapts

Modular design for easy changes

A hardware abstraction layer and clear modules let me swap parts when a vendor changes. Interfaces stay the same, so most of the code keeps working.

Good habits for growth and new devices

Automated builds, static analysis, and neat docs catch bugs early and help new teammates ramp up quickly.

Connecting C++ devices to the cloud and beyond

Simple ways for cloud and language integration

RESTful APIs, MQTT, and gRPC with Protobuf move data between tiny hardware and large back ends. C++ often pairs with Python for heavier tasks or even WebAssembly for browser work. This mix keeps the stack flexible.

C++ brings lightweight AI to the edge

With TensorFlow Lite or ONNX Runtime I run AI models on wearables, scooters, or energy boxes. Local processing cuts latency and saves bandwidth, while the cloud handles deep analysis when needed.

The opportunity for embedded and edge founders in Europe

Why the momentum in embedded and edge is so strong

Demand from healthcare, mobility, and energy keeps the sector lively. Europe’s focus on sustainability and digital sovereignty shapes both rules and funding, offering clear direction for builders who plan carefully.

  • Healthcare: Bioserenity and Cardiolyse deliver real-time patient analytics.
  • Mobility: Voi uses IoT for live tracking and geofencing.
  • Energy: GridX and BeeBryte balance power flows on site.

Where fragmentation meets ambition

Europe has many markets, each with its own quirks. Funding is plentiful yet often modest in size, leading to creative cross-border teamwork.

  • Funding: Smaller rounds, more forms.
  • Deal volume: Spread across regions.
  • Startup density: Many hubs, none dominant.

The double-edged sword of regulation and support

Public funding and strict rules can slow a project or protect it. The key is treating funding and compliance as a single plan from the start.

Making funding and compliance work for your project

How to find support and make it count

Horizon Europe, the EIC Accelerator, and national schemes reward teams that match digital or green goals and build cross-border partnerships.

Why compliance is never just paperwork

Plan for CE Marking, EN 303 645, and WEEE or RoHS as soon as sketches appear. Early care avoids late-stage surprises.

The real lesson: tackle compliance from the start

At my first launch I spent as much time on forms as on code. By folding compliance tasks into the build schedule I avoided last-minute chaos.

C++: Still the anchor for performance and control

Performance and control in tricky places

C++ keeps code small and reactions quick. On a battery-powered sensor every byte and millisecond count, and C++ gives the needed grip.

When other languages show up and why C++ stays on top

Rust brings safety, Python brings speed of writing, yet C++ balances size, performance, and mature tools. It remains the anchor for regulated gear.

Writing modern C++ on small devices

Writing code that’s both safe and fast

RAII, static memory, and constexpr help me build lean and predictable software. I drop extras like exceptions to keep binaries slim and traceable.

Keeping timing and multitasking under control

Event loops, static pools, and cooperative tasks reduce race conditions. Tools like FreeRTOS add structure without heavy overhead.

Building across devices without the headache

Tools and frameworks for many targets

GCC, Clang, CMake, and PlatformIO form my basic kit. Zephyr, Qt, Boost, and OpenCV handle repeated problems so I focus on unique value.

Keeping code clean and ready for change

Hardware abstraction and modular blocks let me swap sensors or boards quickly. Automated builds and clear docs keep teams productive.

Bridging C++ with the cloud and modern tech

Practical ways to connect C++ devices with the cloud

MQTT handles live data, REST covers updates, and gRPC plus Protobuf handle structured messages. WebAssembly lets C++ logic even run in a browser when needed.

How C++ brings efficient AI right to the device

TensorFlow Lite and ONNX Runtime bring smart models to the edge. Local inference reduces delay and protects privacy while the cloud tackles deep study when required.

Lessons from real innovators using C++ at the edge

European teams bringing embedded ideas to life

  • Bioserenity processes medical signals on device for instant feedback.
  • Voi runs real-time IoT inside e-scooters for safe rides.
  • GridX balances renewable energy on site with fast C++ logic.

Practical strategies for hardware, speed, and compliance

  • Modular hardware designs save rework, as seen at Fairphone.
  • Rapid prototypes in makerspaces catch issues early.
  • Early certification plans avoid launch delays.

I’ll never forget the time our multicultural team spent three days straight aligning French, German, and Dutch compliance docs for one device. We survived on espresso and stubbornness.

Growing embedded C++ teams that last

Building talent and strong partnerships

Structured in-house training, university ties, and open-source work keep skills fresh. Regular code reviews and practical workshops strengthen teams.

Using Europe’s innovation network to scale up

Regional grants, innovation labs, and local meetups bring both funding and advice. The right contact at the right time often unlocks a stalled task.

Building embedded and edge tech in Europe takes patience, clear structure, and steady habits. Funding programs, compliance lists, and tiny-device constraints all demand attention. By planning for rules early and leaning on C++ for tight control, I keep projects reliable and ready for use in hospitals, streets, and power grids. Many small improvements stack up and turn tough ideas into working products—even in a fragmented market. Some days, I think my French accent helps me charm the compliance officers—other days, only a strong coffee does the trick.

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25 Years in IT: A Journey of Expertise

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.
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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.
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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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