Studio Dahu - GenevaTwenty years of shipping. Here is the work.
We design, build and run digital products: websites, web apps, mobile and the infrastructure underneath. Three people, no account layer, everything we ship stays ours to maintain.
What we do
Websites
Marketing sites and content platforms, built for speed and search. Astro or Next.js, with a CMS your team can actually use.
Web apps
Products with accounts, billing and real workflows behind them. React, Next.js, Payload, Stripe.
Mobile apps
iOS and Android, native feel, real-time features: voice, transcription, live maps.
Web3 and node infrastructure
Ethereum validators run in production from 2023 to 2025 with zero downtime: deliberate client diversity, scheduled pruning, fork upgrades and slashing-safe migrations.
Backend and infrastructure
APIs, databases, queues, deployment and monitoring. Python, NestJS, PostgreSQL, Docker, self-hosted.
Trading systems
Live multi-broker execution, event-driven backtesting, risk engines and funding settlement.
The work
Fourteen products in production. Websites, apps, marketplaces, trading infrastructure.
We audited our own engine until it stopped flattering us
- Live multi-broker execution on Binance Futures and OANDA: order lifecycle, broker-side stops, position reconciliation, kill switches.
- Two biases found in our own backtester, both in our favour: a 37 % P&L overstatement and a look-ahead hiding 73 % of max drawdown.
- Reported return fell from 18 %/yr to 11.1 %/yr. The feature the bug flattered was costing money, so we turned it off in production.
Our own bet: a proof layer on Solana
- IronChain records that something really happened: a session, a shift, an inspection. The detail stays on the device, only its fingerprint goes on chain.
- One attestation per person per month instead of one write per event. Twelve writes a year is what makes the economics work.
- ohmGym is the first application on it: a training app whose sessions land as signed proofs in the user own wallet.
How we work
Three things that decide whether a project goes well.
We build it, then we run it
Every project on this page is live and maintained by the people who wrote it. Nothing is handed to a team that never saw the code.
Trading infrastructureYou talk to the builder
Three people. Your question reaches the person writing the code, not an account manager who will relay it.
BikervoiceMeasured, not claimed
Load time, search visibility, conversion: numbers we check after launch and keep checking, not promises made before it.
MaPrimeSerre“Very good collaboration with an experienced, invested and attentive developer, capable of proposing adapted solutions even on complex aspects. Joris was able to transform my objective and vision into reality. The follow-up is serious and exchanges are fluid. I am very satisfied and recommend him.”
Something you need built?
Tell us what you are trying to ship. We will tell you plainly whether we are the right studio for it.