I build products. Fast.
SEK is my studio: SaaS, tools and media built solo, supercharged by AI. The motto fits in three words — Ship · Earn · Keep.
What we shipped
16 products · live
SaaS8
PurrPlan
LiveYour AI agent for social media: create, schedule and publish across 11 platforms.
purrplan.ai ↗ 🚦GoNoGo
LiveKnow if your app idea will sell before coding it: funnel + real ads + a paywall that measures purchase intent. Go/No-Go verdict.
gonogo.daddeveloper.dev ↗ 🌅Pensées Positives
LiveThe app that sends you a daily positive thought and affirmations to lift your mood. iOS, FR/EN/DE.
penseespositives.daddeveloper.dev ↗ 🦀DropShell
LiveThe radar for expired domains that still carry SEO weight. Bernard knocks on shells, you move in.
dropshell.io ↗ 🦫LinkBeaver
BetaLive sites still link to dead pages in your niche. Justin finds them — you reclaim the links.
linkbeaver.io ↗ 🏋️CoachPéi
BetaAll-in-one management for fitness coaches: clients, programs, follow-ups. Made in Réunion Island.
sebastiendebollivier.com/coachpei ↗ 💪Kaz Sport
LiveThe directory of every gym in Réunion Island, sorted by town. Find your gym near you.
kazsport.re ↗ 🥗Dodo Kal
LiveCount calories by snapping your plate: the AI recognises cari, rougail and bouchons. Barcode scanner, macros and BMI included.
dodokal.fr ↗Services & coaching4
The Technical Check
LiveA deep manual review of your site before a key moment: production, due diligence, partner. Report within 48h.
sek.re/audit ↗ 🛟Unstuck
LiveStuck on your tech (Stripe, API, deployment)? An expert unblocks you in 30 minutes, live.
sek.re/unstuck ↗ 👨👧👦CodeAvecPapa
LiveCode and AI learned as a parent + teen duo (10-16). 12 sessions per quarter, real projects.
sek.re/codeavecpapa ↗ 🛠️Custom builds
LiveFreelance dev: websites, SaaS and AI automations built with you, for your business.
sebastiendebollivier.com ↗Tools & content4
demar.re
LiveYour business gets going, with AI. Guides, calculators and a toolkit to launch.
demar.re ↗ ❤️yourXP
LiveTurn your customer reviews into a wall of social proof (wall of love) that converts.
yourxp.fr ↗ 🐶pupopup
LiveThe little social-proof notifs ("X just signed up") that boost conversions.
pupopup.co ↗ 👨💻daddeveloper
LiveBuild-in-public: dad, dev & investor. How AI frees up time for family.
daddeveloper.dev ↗A one-person studio, in the age of AI
The philosophy
Launching a product used to take a team, months, and capital. Not anymore. Solo, with the right tools and AI as a copilot, I design, code and ship entire products — then let them live. That's SEK: proof that one dev can build a constellation of products without sacrificing any freedom or family time.
I ship. Fast. A product that's live beats ten perfect ideas stuck in a notebook. AI crushed the cost of building — so I build.
Products that pay their way. No fundraising, no growth at all costs: real revenue, real customers, from day one.
I keep it all: the code, the customers, the independence. No boss, no investors. Just a dev, his family, and the time he chooses.
From idea to market — solo
The method
A typical studio waits for you to bring an idea. SEK operates differently: we first spot what has a real market, build it, then send it into the world. Four in-house capabilities, end to end.
- 01
🎯 Identify
Strategik, our proprietary market intelligence tool, scans competitors, detects ASO gaps and models the optimal positioning — before writing a single line of code. We don't build blind.
Strategik — Market Intelligence ↗ - 02
⚡ Build
Solo, with AI as co-pilot, we ship entire products in weeks. No meetings, no committees, no technical debt: clean code, delivered fast, built to last.
- 03
📡 Distribute
PurrPlan, our AI distribution tool, publishes and schedules across 11 social platforms. Acquisition starts on launch day — not six months after.
PurrPlan — AI Distribution ↗ - 04
🔗 Rank
DropShell spots expired domains with intact SEO authority; LinkBeaver reclaims backlinks from dead pages in your niche. The studio builds its authority with its own tools — we don't rank by accident.
DropShell + LinkBeaver — SEO Engine ↗
What I learn while shipping
All articles ↗Writing every day as a solopreneur: discipline or system?
A raw look back at 6 months of daily writing as a solo founder: why discipline collapses, and how a system replaced it.
Read →Recurring revenue as a solo: MRR without an agency, without the bullshit
Building MRR solo without raising funds or hiring: 3 concrete models, a 90-day sequence, zero hype.
Read →My minimalist AI stack: the only tools that actually matter when you work alone
Stop testing 40 AI tools. An effective solopreneur needs just 3 or 4 — well-chosen, well-mastered. Here's my current stack, what I cut, and why fewer tools produce better results.
Read →
Sébastien de Bollivier
Developer since 2008, 50+ projects shipped. Dad, husband, based in Réunion Island. I code, I ship, I invest — and I document the journey in public. SEK is my way of proving you can build a lot, solo, without burning out.
Got an idea to ship?
A website, a SaaS, an AI automation for your business? I build custom — at the same speed as my own products.
Talk about your project