Hyosua Colléter

Technical Lead

Profile

Former postman turned Technical Lead by passion (work-study, MCSI Master's), I've kept one obsession: customer satisfaction.
To me, a project is managed like a delivery route:
an organized and meticulous preparation for a smooth execution with no detours.
Code is just a tool.
What truly matters to me? leading a team, solving problems, learning, discovering.

Work Experience

Technical Lead Apprentice — Trinexta

Évry (91)

Oct 2026 - Présent

Key Achievements

  • Technical lead of the development team (4 developers): architecture, quality, delivery

  • Mentoring juniors, client audits and scoping

  • Work-study Master's in Management and Consulting in IS (ESGI)

Lead Developer (internship) — Trinexta

Évry (91)

Mai 2026 - Sept 2026

Key Achievements

  • Built the dev team's structure (4 developers): Git workflow, mandatory PRs, code review (400 PRs in 3 months)

  • Kanban management on GitHub Projects: priorities, estimates, tickets scoped to each developer's level

  • CI/CD with GitHub Actions, tests, pre-commit: around 550 successful deployments, documented rollback

  • Monitoring and webhook alerts to Teams, incident runbooks

  • AI governance: usage rules (AGENTS.md), "understand before accepting", takeover of a 78,000-line codebase largely AI-generated

  • Deliveries: trinexta.fr rebuild (LCP nearly halved), HR platform, client e-commerce, SEO audits

Expert Service Mail Carrier — La Poste

Yerres (91)

2016 - Présent

Key Achievements

  • Route optimization (sorting cases, routing plans, Delivery Points)

  • Update of the computerized system during the reorganization of the Lanmeur (29) office in 2022

  • Regular replacement of Operations Managers

  • Proficiency with software and intranet applications

  • Sorting, preparation, and delivery of mail/parcels across more than 40 routes

  • Services for individuals (Digital Identity, Watch Over My Parents, Claims)

Developer (Intern) — Aximum (Groupe COLAS)

Lannion (22)

Mar 2015 - Juin 2015

Key Achievements

  • Added data export features to the SYMART software

  • Needs analysis

  • SVN integration

  • Technical documentation and user guide

Developer (Intern) — Teraqua

St-Martin-des-Champs (29)

Avr 2014 - Juin 2014

Key Achievements

  • Development of an administration interface for industrial controllers

  • Creation of shell scripts for configuration

  • Creation of a network configuration interface

  • Implementation of a data update feature

Skills

Frontend

React
Next.js
Typescript
Tailwind CSS
Bootstrap
SASS
HTML
CSS

Backend

Node.js
Express
Python
PHP
Laravel
Prisma

Database & Storage

PostgreSQL
MySQL
SQLite
MongoDB
Redis

Cloud & DevOps

Docker
Vercel
CI/CD
Git
Linux
Nginx / PM2
Uptime Kuma
Cloudinary

Tools & Others

Vite
Framer Motion
Sanity CMS
GitHub Projects (Kanban)

Selected Projects

trinexta.fr
Details

trinexta.fr

Rebuild of the corporate website of a digital services company: from WordPress to a custom application, with SEO migration.

Next.jsTypeScriptSanityPrismaPostgreSQLGitHub Actions
hellmet
Details

hellmet

Static code vulnerability analyzer based on OWASP Top 10 (2025).

Next.jsTypeScriptTailwind CSSGroq APIJestReact
Exquisite Corpse
Details

Exquisite Corpse

Online multiplayer version of the famous Exquisite Corpse literary game.

Next.jsTypeScriptRedisSocket-ioReactFly.ioDockerTailwind CSS
Peakture
Details

Peakture

Community platform featuring photography contests.

ReactMongodbExpressNode.jsTailwind CSSViteFramer Motion
GmBlackqueen
Details

GmBlackqueen

Creation of a showcase website for a Paris-based makeup artist.

HTMLCSSJavascriptVanillaSwiper.js
miaw-techwear
Details

miaw-techwear

Creation of a fictional e-commerce website offering luxury high-tech clothing for felines.

PHPMySqlWordpressBootstrap
UX Good Patterns
Details

UX Good Patterns

Open Source project:
Interactive examples of UX patterns and anti-patterns.
My contribution:
PR with an example of Floating Labels usage

ReactTypeScriptTailwind CSSFramer MotionAstroShadcn UI

Academic Background

Master's in Management and Consulting in Information Systems (work-study)

2026 - Présent

Paris (75)

Achievements & Activities

  • Project management, agile methods (Scrum, Kanban), change management

  • Scoping and modelling (BPM, UML), MOA / MOE, IS audit and security

  • IS cost and value (ROI), DevOps, cloud, Kubernetes, Terraform (electives)

Evry (91)

Achievements & Activities

  • Development of Web services, website design, DBMS

  • Networks, Systems Administration, Virtualization, Security

  • Project management, Organization and Business Management, English, Supervised projects

Lannion (22)

Achievements & Activities

  • Programming, Algorithms, Information Systems, Databases

  • Networks, Systems Administration

  • Project management, Professional environment, English

  • Mathematics

Interests

Transforming stories into visual identities…

Coyote

Coyote

Marco & Monti

Marco & Monti

Pandacare

Pandacare

Ridefit

Ridefit

Aquila

Aquila

Ferret

Ferret

Tech Watch

Contact

Send me a message