Portfolio
Vincent LEOSTIC
Front-end software developer, UI/UX and accessibility
I design and build business applications, from the first requirements to production, with care for every detail of the interface.
About
Interfaces that make people say “wow”
After ten years in the restaurant trade, I had seen all it had to offer: in 2018, I retrained as a developer.
- What do I love?
- Designing polished interfaces that make people say “wow” the moment they land on them. My first ones were a bit garish: I learnt the hard way, and it left me with an eye for the right detail.
- The project I'm proudest of?
- A fire safety application that helps firefighters plan their response to incidents. Knowing it will help protect people means a lot to me.
- Outside work?
- I listen to a lot of music, mostly metal. As for games, I love grand strategy, Europa Universalis above all, and Final Fantasy XIV, my all-time favourite, for which I'm building an app for completionists.
How I work
Listen
To users' needs, as they experience them.
Understand
How people work, the constraints and the goals.
Design in iterations
A first version of my vision, refined step by step.
Get sign-off
Each version is approved before going further.
Projects
Business applications and live websites
A selection of projects carried out at iD3i, then my personal projects: two live websites and an app in progress.
Projects at iD3i
Sports club membership management
Product Owner, project manager and developer
Application that brings a sports club's day-to-day running into one place: member records and registrations.
Restaurant planning
Developer
Tool for managing orders, rotas and everything else that comes with running a restaurant. A trade I know from the inside.
Favourite
Fire safety
Product Owner, project manager and developer
Application for creating pre-incident plans for firefighters, looked up by entering a site's details and exported as PDFs. Drawing tool for marking sensitive and high-risk areas on drone photos.
Marine pollution response
Project manager and technical lead
Stock management application for pollution response equipment, so that it is ready on the day it is needed.
id3i.fr website redesign
Developer, functional lead and AI
Complete redesign of the company's website, built on proven technologies backed by the community.
Personal projects
Ramonéa (opens in a new tab)
ramonea.fr
Website for a chimney sweeping business on the Crozon peninsula: services, prices, FAQ and contact, with a full back office so the owner can manage content, photos, translations and SEO on their own.
- Vue.js 3
- TypeScript
- Supabase
Les ateliers de Camille (opens in a new tab)
camilledeboiscuilletherapeute.com
Website of Camille de Boiscuillé, a psychotherapy practitioner in Crozon: her services (art therapy, EMDR, family therapy) presented on an ultra-light static site, with no JavaScript and no cookies.
- Astro
In development
Final Fantasy XIV app
An app for completionists of Final Fantasy XIV, my all-time favourite game, to track progress across everything the game has to collect.
Skills
My toolbox
Front-end & UI/UX
- Accessibility (WCAG)
- Vue.js 3
- Nuxt
- Astro
- TypeScript
- Modern CSS
- Interface design
Back-end
- Node.js
- C#
- PostgreSQL
- Supabase
DevOps & tools
- Git
- GitLab CI/CD
- GitHub Actions
- Deployment (Vercel, OVH)
AI-assisted development
- Claude Code
- Skills, hooks & agents
- LLM integration
Other
- Project management
- Requirements gathering & specifications
- Client relations
- SEO
- Multi-project work in IT services
- Keeping up with tech
- Personal projects
Background
The road so far
2008 – 2018
Restaurant trade
Waiter, then front-of-house manager.
2018
Career change
Software developer vocational qualification, at AFPA.
Since 2019
Software developer
At iD3i, an IT services company in Brest: varied projects, specialising in front-end and UI/UX.
In progress
Expert in software development (opens in a new tab)
Master's-level qualification (EQF 7), through recognition of prior experience.
Tomorrow
With you?
A full-time role in your team: let's talk.
- Availability
- Immediate
- Transport
- Driving licence (category B)
- Languages
- French (native) and English (fluent, professional)
Interests
Away from the code
A common thread: whether in Final Fantasy XIV or in a tabletop role-playing game, I play the tank. Moving forward as a team while holding an essential role matters to me.
All-time favourite
Final Fantasy XIV
Paladin tank since the 2013 relaunch. I love its story and characters, so much that I'm building an app for its completionists.
Now playing
Royal Sorrow
Music
Mostly metal, and a lot of video game soundtracks.
Electric Callboy, Sabaton, Ghost, Rammstein and Motörhead
Game soundtracks: Clair Obscur: Expedition 33 and NieR
Festivals: Hellfest and Motocultor
Video games
History has always fascinated me, and I love games driven by their story.
Strategy: Europa Universalis, Total War, Anno, Ixion and Frostpunk 1 & 2
Stories: Tunic, Outer Wilds and Baldur's Gate 3
Around a table
Chess, quick little games, never-ending games of Risk… and tabletop role-playing games, which I'd love to play more often.