01
Team reinforcement
Shipping the next features with your team: web, mobile and API, all the way to production.
~/simon_boisset
Simon Boisset, Freelance software developer, web & mobile
I design and build web and mobile apps in TypeScript, from the interface to the API, all the way to production. Since 2020, for startups and SMEs, as extra hands in the team or as tech lead, with React, React Native and Node.js.
- Shipping since 2020
- Web · iOS · Android
- TypeScript end to end
- email:
- [email protected]
- site:
- simonboisset.com
- linkedin:
- in/simon-boisset
- github:
- simonboisset
- location:
- Nantes, remote
- ProductUX/UI, marketing, sales
- Agentic AIClaude Code · Codex · MCP
- Back endNode.js · oRPC · PostgreSQL
- WebReact · TanStack Start
- MobileReact Native · Expo
What I do
02
Taking over an app
Understanding an existing codebase quickly, clearing technical priorities, putting structure back where it is needed.
03
Building an app
Designing and shipping a web or mobile app from scratch, aligned with your existing product.
04
Tech lead
Evolving the architecture and supporting the team in its technical choices.
What I delivered
CAMPING-CAR PARK
03.2024 – 09.2025
React Native · mobile lead
Expo · CI/CD · maps
- context ›
- Booking app in production, built on an ageing React Native codebase.
- action ›
- Migration to Expo: unmaintained libraries replaced, build and release pipeline configured. Then a redesign in 2025, booking and maps, with the product and back-end teams.
- result ›
- An up-to-date Expo codebase, more reliable releases and a team supported over time.
MOBIAPPS
10.2025
React Native · Expo migration
Expo · config plugins
- context ›
- Legacy React Native app to modernise.
- action ›
- Migration to Expo: native configuration, Expo plugins, dependencies and React Navigation.
VAERDICT
since 2024
Full-stack · tech lead
React · Node.js · TypeScript
- context ›
- Business web app to evolve, with an internal team.
- action ›
- Re-architecture to make it scale, tech lead of the team.
- result ›
- A more scalable codebase, a supported team.
LiNote
2023
React Native · new app
Expo · iOS · Android
- context ›
- Web communication platform with no mobile app.
- action ›
- App built from scratch: messaging, photo sharing, video calls, notifications and alerts.
- result ›
- Key features shipped on iOS and Android.
Silbo
2020 – 2022 · employee
Full-stack
Node.js · TypeScript · React · React Native
- context ›
- Web and field apps for healthcare.
- action ›
- Full-stack development, real time, production operations.
- result ›
- Apps shipped and used every day.
Client feedback
#01
“We started from a fairly complex legacy codebase. Simon took over the project, brought structure back to the whole stack, and still supports us day to day.”
Eric
#02
“Simon built our React Native app from scratch while keeping it aligned with the existing web app. In a few weeks, we had reminders, messaging, photo sharing, and video calls.”
Julie
#03
“We had been dragging this Expo migration for more than a year. Simon reassured us, delivered it in two weeks, and we were able to publish a clean version afterwards.”
Matthieu
#04
“Simon joined a project where frontend, backend, mobile, and infrastructure were all tied together. He quickly understood how everything fit together, which saved us a lot of back and forth.”
Thomas
#05
“Simon migrated three of our React Native apps to Expo after more than 9 years of maintenance. The migration went smoothly, and we are already seeing the benefits: much faster upgrades and finally reliable builds.”
Romuald
#06
“Our mobile codebase had become too complex: too many special cases, too many dependencies, and not much certainty left. Simon helped us regain control and put a clear structure back in place.”
Antoine
One expertise, one product
React Native → Expo migration
expertise
Moving a legacy React Native app to Expo without blocking releases, including apps maintained for more than nine years.
See the Expo migrationExample
Questovery
my product · since 2024
Treasure hunts, scavenger hunts and guided tours: a web workspace for organisers, an iOS and Android app for players. Designed, built and sold on my own.
Discover QuestoverySkills
Mobile
React Native, Expo, EAS, push notifications, geolocation, store releases
Web
TypeScript, React, TanStack Start
Back end & delivery
Node.js, oRPC, Effect TS, Bun, PostgreSQL, Drizzle, Docker, GitHub Actions, CI/CD
Agentic AI
Claude Code, Codex, MCP
Product
UX/UI, user journeys, marketing, sales
EducationMaster's in Laser Physics, Université Lille 1, 2014Software development, self-taught, project by project, since 2015
Contact
I enjoy joining an existing product, understanding its constraints and moving it forward with the team in place. If your web or mobile app needs an extra pair of hands, I would be glad to talk.
- email:
- [email protected]
- linkedin:
- in/simon-boisset
- github:
- simonboisset