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

Abstract:

The article introduces peer problem-solving sprints as an efficient, minimalist approach to collaborative work for solo tech professionals who value clear boundaries and minimal digital clutter. Unlike hackathons, masterminds, or consulting sessions, peer sprints are one-off, focused events where a small group tackles a single well-defined challenge—such as launching a product, fixing a stubborn bug, or planning a new feature—then disbands with no lingering commitments or group chats. The process emphasizes keeping things simple: participants use minimal tools, assign lightweight roles like facilitator and timekeeper, and follow a clear agenda to maintain deep focus and avoid burnout. Real-life scenarios, such as developers resolving a tough bug together or freelancers brainstorming under tight deadlines, illustrate how sprints deliver practical breakthroughs without creating extra digital mess. The article provides practical templates, checklists, and scripts for inviting peers, running effective sessions, and ensuring a clean wrap-up, highlighting that sprints work best for substantial but solvable problems and cautioning against using them for vague or ongoing tasks. Ultimately, peer sprints offer the benefits of teamwork—fresh ideas, momentum, and support—while preserving individual autonomy and a tidy workspace, making them ideal for tech minimalists seeking results without chaos.

When you’re working solo in tech, group projects can feel tricky. Fresh ideas and energy are great, but endless messages, meetings, and digital mess? Not so much. Peer problem-solving sprints offer a simple way to tackle big challenges without the usual hassles. Here, I'll share how a peer sprint is different from hackathons, masterminds, or consulting, and why it works well for anyone craving clear boundaries and tidy digital spaces.

Sprints deliver group creativity—focused energy, quick results, new perspectives—without long commitments or messy Slack threads. The basics are clear: one challenge, a small group, a single purposeful session. You’ll see when a sprint fits best (and when it doesn’t), how to set one up with little hassle, and how to keep things clean before, during, and after.

You’ll get practical templates, checklists, and real-life scenarios showing how a good sprint breaks through roadblocks—launching a product, fixing a stubborn bug, or planning something new. If you want real results and order—without more noise—this approach keeps things simple and direct.

What makes a peer problem-solving sprint unique

Simple, focused group effort

A peer problem-solving sprint is a short, sharp session where a few people get together to crack a single challenge. Then, everyone goes back to their own projects. No ongoing group, no endless threads, no lingering commitments. Unlike hackathons that last days or masterminds that go for months, a sprint has a clear start and finish. Gather, solve, and that's it. What draws in tech minimalists?

Minimalist by design

Sprints focus on results, leaving out the rest. They avoid the usual group project traps—no weekly meetings, no group chats, no extra clutter. Here’s what makes them stand out:
- One-time event, not recurring
- No ongoing invite or chat
- Clear beginning and end
- Only essential notes

Seeing what's not a sprint helps too.

Not a hackathon, mastermind, or consult

Other collaboration styles can get complicated or drawn out. Here’s a comparison:

Model Duration/Format Group Commitment Outcome Hackathon 24–72 hours, competitive High Prototypes, prizes Mastermind Ongoing, regular meets Long-term Support, accountability One-off Consult Single session None Quick advice Sprint 1–5 days, structured One-off Clear solution

Sprints land between quick advice and long-term groups: they’re focused, hands-on, and finish neatly. This style matches up with folks who want less clutter and more momentum.

While sprints are great for quick, focused problem-solving, ongoing peer support structures like mastermind groups or accountability partnerships offer sustained relationships, regular check-ins, and deeper support over time. In my experience, sprints can be a gateway—helping you connect with peers in a low-commitment way before deciding if you want to join or form a longer-term group.

Why sprints appeal to tech minimalists

Group energy without the hassle

Solo tech people often want a burst of new ideas or help breaking a problem, but not another group chat or recurring commitment. Sprints tap into group strengths while protecting your independence. Let’s say a developer is stuck on a bug, grabs two peers for a focused two-hour sprint, and leaves with a solution—no ties, no clutter.

As someone who has balanced freelance projects and startup ventures, I know how easy it is for group work to spill over and drain your energy or focus. There were times, especially during my early days in Berlin, when I joined ongoing groups that slowly crept into my evenings and weekends. Sprints let you sidestep that trap.

Clear boundaries and deep focus

Sprints line up well with minimalist values:
- Clear boundaries—no slow spread or extra tasks
- Deep focus—everyone is tuned to a single challenge
- Intentional teamwork—no wasted energy

Time limits help keep group work from creeping into daily life. This is more than just boundaries—sprints bring real punch and progress.

Real engagement, no leftover mess

Sprints offer group spark and new ideas, but end clean—no digital leftovers or ongoing chores. This makes it possible for those juggling busy work and personal lives or needing some mental space. Sometimes, choosing a sprint is just about enjoying teamwork without the endless follow-up.

And let’s be honest: for many of us, especially those who’ve felt the mental load of too many Slack channels, the relief of a “one and done” session is real.

When sprints are the right (and wrong) tool

Best moments for a sprint

So, what kinds of solo challenges fit a sprint? Sprints work well when time is short, stakes are high, or a project needs fresh views. Typical use-cases:
- Facing a big decision
- Starting a new project or product
- Handling a complex problem with many angles
- Rapid prototyping or experience mapping
- Getting unstuck from a tricky bug or issue

Sprints shine for big, tough problems where group insight quickly changes the game.

Best kept secret for solo pros

Not every problem suits a sprint. Sprints work wonders for launching products, breaking persistent bugs, or figuring out features that are overwhelming alone. For example, a small group could brainstorm a new app’s onboarding in an afternoon or troubleshoot a nagging deployment problem. These focused bursts help move things forward, minus the recurring meetings.

Keep it tight and clear

Don’t pick sprawling, vague problems for sprints. If the outcome isn’t focused, a sprint can become frustrating. Stick to well-defined, solvable challenges—unclear goals waste everyone’s energy.

When a sprint won’t fit

If the issue isn’t clearly defined, sprints won't help. Not suitable for:
- Long-haul research or technical deep dives
- Small routine decisions
- Projects with unclear or changing aims

Slower models or solo work are usually better in these situations.

Watch for losing focus or unfinished tasks

Thinking of running a sprint? Take care: if the challenge isn’t tight or people expect more follow-up, a clean sprint can quietly become a never-ending job. It’s a bit like tidying the closet—if you start pulling out everything, soon the whole house is upside down. So, keep the goal narrow and make it clear when the sprint is truly done.

How to set up a peer sprint

Picking a challenge that fits

First, pick a problem that’s not too small but not too huge. It should be complex enough to need a team—a product bottleneck, tough bug, or sticky feature design—but still possible to solve in a day or two.

The sweet spot is a tricky problem solo, but easy for a few sharp minds. For example, planning a new onboarding or fixing a recurring bug works great.

To be sure, run a quick check:
- Is the problem well-defined?
- Can it be solved in a session or day?
- Does it benefit from several viewpoints?

If any answer is “no,” another approach might work better.

The right problem leads to the next step—gathering your team.

Building your sprint crew

Peer sprints work best with two to four people who know the topic. It’s not about big groups; it's about different perspectives. Fewer people mean more open sharing and quicker decisions.

Keep the invite simple and to the point. Here’s a straightforward script:

“I’m gathering a small group for a focused sprint to tackle [describe the challenge]. It’ll take about [X] hours on [date]. Your experience with [skill or area] would help. No follow-up, just solving together. Interested?”

This way, everyone knows what’s involved, and can say yes or no easily. Smaller groups also make people feel safer sharing honestly.

With your group ready, set up should be just as clean.

Minimalist setup

Less is more. Use the simplest tools—a Google Doc, Miro board, or just a video call. No need for a new Slack channel or group chat unless it’s essential. Fewer tech tools mean more focus on the work.

In my experience, using a single shared doc and archiving it right after the sprint keeps digital clutter at bay—a lesson learned from managing cross-border teams where too many tools led to confusion.

Recommended basics:
- Google Docs for notes and brainstorming
- Miro for visualizing or drawing
- Video calls for discussion

Keep all notes in one clearly named folder. Plan to archive or delete it after, so clutter doesn’t build up.

Here’s a checklist:
- One shared doc or folder for notes
- Label it with the sprint topic and date
- Decide how to archive or clean up

Now, you’re ready to run your sprint.

Running a sprint with focus and flow

Built for deep work, not burnout

How do you keep things lively but not tiring? A simple, timed agenda helps.

Start with a 10-minute kickoff to align on the challenge and goal.

Then a focused work block (45 to 90 minutes, maybe another if needed), with a quick break in between.

Wrap up with a summary and next steps.

This keeps energy up and minds on the problem, not the clock.

Making time your friend

Short timed blocks and small breaks keep creativity running. Five or ten minutes to stretch or grab coffee can make a difference. Everyone stays sharper and leaves with more.

Lightweight roles that help, not distract

Choose a facilitator to keep things on track. This person brings the group back if talk wanders and helps every voice get heard. Roles don’t need to be fussy.

Have a timekeeper and note-taker, too. The timekeeper keeps the agenda rolling, and the note-taker grabs key points and next steps. For example:
- Timekeeper: “Five minutes left.”
- Note-taker: “Choice: Try solution X. Jane: prototype it.”

Assigning roles keeps things tidy, not bureaucratic. It’s also key everyone feels safe to share or step back. Less stress means fresh ideas.

Clutter-free during the sprint

Resist the urge for extra chats or channels. Usually, one doc and a video call does the trick. No follow-up threads needed.

Quick rules:
- Use one shared doc
- Keep talk in the meeting
- Skip new emails or chats unless essential

Aim for a good-enough result, not a perfect report. Once you’re done, tidy up.

Wrapping up your sprint with clarity

Mark the end and enjoy the win

A short ending session makes a difference. Review what got done, thank everyone, and make it clear the sprint is finished. This prevents any drifting or confusion.

A quick round of thanks—or a shared note—ends the group on a positive note. Little rituals make goodbyes less abrupt.

Archiving without clutter

Save a one-page recap of what happened and lessons learned. Archive or delete other docs and chats. Store your summary in a clearly named folder or send a brief recap to your group. Maybe set a reminder to clean up again if needed:
- Only keep what’s needed
- Avoid digital clutter
- Make it easy to look back later

Keeping things tidy means smooth starts the next time, too.

I still remember the relief after a sprint session where we finally cracked a bug that had haunted us for weeks—the sense of shared victory made the solo hours that followed much lighter. It’s a small thing, but it sticks with you.

Peer sprints in action

Sprint breakthroughs

Sometimes the best way to get it is through quick examples.

When I was leading a multicultural team in Beijing, we often used focused sprints to break through marketing challenges—one afternoon session sometimes saved us weeks of back-and-forth. I remember one session where we had to localize a campaign for three different markets. We gathered for two hours, mapped out the key differences, and left with a clear plan. It was a bit like herding cats, but with fewer scratches.

At my cross-border e-commerce startup in Shanghai, we hit a wall with a product launch. Instead of dragging it out, I pulled in two colleagues for a sprint. We used a shared doc and a video call, and by the end of the day, we had a new launch strategy. That sprint shaved weeks off our timeline.

When we introduced sprints at my Berlin company, we tracked a 30% reduction in project turnaround time. It wasn’t magic—just focused, time-boxed teamwork.

And yes, sometimes the best moments come from the unexpected. Once, during a sprint to fix a stubborn bug, someone suggested a wild workaround. We laughed, tried it, and it worked. That sense of shared breakthrough? It’s hard to beat.

Sprints flex to fit all kinds of sticky problems. With a few sense checks and steady habits, it works.

Guidelines and pitfalls

Easy rules for success

A few clear habits help:
- Define the problem tightly
- Keep the group small
- Assign simple roles
- Time every part
- Aim for one outcome

Transparent time and expectations keep stress low and surprises away.

Respecting time and boundaries

Share timing and limits upfront and during the sprint. This keeps things chill for everyone. Still, it’s possible to fall into common traps.

Watch out for typical pitfalls

Scope creep is a common headache. Without a tight plan, chat can wander and ideas multiply. Park extra ideas in a backlog for later. Stick to the plan and visit those only after wrapping up.

Let-downs also show up when next steps are hazy. Assign clear owners for any follow-ups and clearly say the group dissolves at the end. A quick checklist—what’s done, what’s next, who owns it—gives closure.

Sometimes, a few people talk more than others. Rotating roles or letting everyone take turns helps the group stay lively and equal.

Templates and checklists can make running a sprint even easier.

Templates and next steps

Simple invite script

Try this simple ask to get your group going:

“Hey [Name], I’m assembling a small group to tackle [describe the challenge] for about [X] hours on [date]. Your [skill or experience] would really help. No ongoing commitment—just focused problem-solving. Interested?”

Once you have your team, a straightforward agenda keeps things rolling.

Sprint agenda cheat sheet

A quick structure helps:
- Kickoff (10 min): Name the problem and goal.
- Focused work (45–90 min): Get into brainstorming or mapping.
- Break (5–10 min): Pause and reset.
- Optional: Second work block.
- Wrap-up (10 min): Recap results, note next steps, mark it done.

Keep to the basics, then wrap up clean.

Getting out clutter-free

When it’s over, tidy up with this list:
- Archive the main doc with a clear name and date
- Delete leftover files or chats
- Send a short recap or thank you
- Confirm it’s over and no follow-up is needed

With these, your sprint runs smooth and ends with a clean slate.

Peer problem-solving sprints pull together the best of teamwork—energy, fresh ideas, and practical answers—without all the mess of ongoing chats or endless commitments. For solo tech workers craving clear minds, sprints let you break a jam, make progress, then return to your own work feeling lighter.

If there’s one thing I’ve learned from running sprints across cultures and companies, it’s that the simplest structures often lead to the biggest breakthroughs. Not every sprint is a home run—sometimes you walk away with more questions than answers—but even then, the clarity and momentum you gain are worth it. Teamwork doesn’t have to be complicated or noisy. Sometimes, just one focused session is all it takes to unlock a solution and keep both your workflow and headspace uncluttered.

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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

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