CESI
Computer science engineering degree — EQF level 7
Software major, AI option in year 5 · problem-based learning
Léandre Fernandez — Software engineer — full-stack & web applications.
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I’m a software engineer. I mostly do full-stack1 development, and some AI when a project calls for it. I’ve worked in banking, industry and tech2 — each time on web3 applications, from understanding the need all the way to production.
- Expertise
- Full-stack development · Enterprise apps · Applied AI
- Sectors
- Banking · Industry · Public sector
- Deliverables
- Web applications · Internal tools
$ git log --reverse --tags main
- companies
- 05
- countries — FR · LU
- 02
- first commit
- 2022
Mars Wrigley
Web developer — internship
- Ran the 12 European M&M’s websites
- New features, tests, bug fixes and a caching tool rollout
- New product launches, with teams in the US and India
- E-commerce
- Cache
- Tests
Caisse d’Epargne Grand Est Europe
Software engineer — internship
- Evolved the internal applications used by branch staff
- Created and ran the project for an app assisting customer file creation
- Workshops with branches to understand their needs
- Angular
- .NET
- PHP
- SQL
↳ follows v2.0
Caisse d’Epargne Grand Est Europe
Software engineer — contract
- Carried the internship application through to production
- New features and bug fixes on existing applications
- Angular
- .NET
- SQL
CTG Luxembourg PSF
Analyst developer — internship
- New Vue / Java application built from scratch
- Agile delivery and CI/CD with Jira and GitLab
- Teamwork with functional analysts and testers
- Vue
- Java
- GitLab CI/CD
- Jira
Opticod
AI engineer
- Technical audit: requirements analysis and specifications
- AI-based image recognition built into the OPTIWMS application
- Node.js integration and optimisation for Android devices
- Validated through a POC and field tests, shipped with full technical documentation
- Node.js
- Android
- Image recognition
- POC
HEAD → main
NSI Luxembourg PSF
Analyst developer
- eCommodo — environmental permits for the Luxembourg government: bug fixing, change requests, technical analysis and estimates
- Acting Tech Lead: deployment management, merge request reviews, ticket allocation
- Migrated applications from WebSphere to Liberty, moving to Java 21 and Jakarta EE 10 (R&D, architecture)
- Coordination with external entities — MyGuichet, DIPEP, CTIE
- Technology watch and promoting AI in the team to boost developer productivity
- Java 8/21
- Jakarta EE 10
- Struts 2
- JPA / EclipseLink
- WebSphere / Liberty
- DB2
What I do when I’m not coding. Four things I love, and each one taught me something I bring back to work.
- 01Gear trainFootball, 10+ years in a clubIt taught me to play for the team before playing for myself.
- 02EscapementBrazilian jiu-jitsu, grappling, MMA — competingStaying calm under pressure, and knowing when to give everything.
- 03BarrelConditioningShowing up even when I don’t feel like it: progress comes from consistency.
- 04Balance wheelWatchmakingI like understanding how things work, down to the smallest detail.
- 01Gear trainFootball, 10+ years in a clubIt taught me to play for the team before playing for myself.
- 02EscapementBrazilian jiu-jitsu, grappling, MMA — competingStaying calm under pressure, and knowing when to give everything.
- 03BarrelConditioningShowing up even when I don’t feel like it: progress comes from consistency.
- 04Balance wheelWatchmakingI like understanding how things work, down to the smallest detail.
- Front-endAngularVueJavaScriptHTML / CSSBootstrap
- Back-endJavaNode.jsPHPC#PythonC / C++
- AIMachine learningDeep learning
- DataOracleMySQLPostgreSQLDB2
- ToolingGitGitLabGitHubDocker
- Base — languagesFrenchNativeEnglishC2SpanishB2
- Method
- Technical documentation · Autonomous problem solving
$ git branch --list 'side/*'Three apps I built on my own, in my spare time, from the first idea to going live. Two of them are open source: the code is on GitHub.
$ git checkout side/proximaSide project 01 / 03The chat that remembers nothing.
An anonymous, real-time, ephemeral proximity chat. No account, no persistent data: you join, talk with people within 75 km, close the tab — nothing is left.
- Every room and private message end-to-end encrypted — X25519, XSalsa20-Poly1305 via libsodium
- Geospatial presence with Redis GEOSEARCH, towns of 5 countries geocoded without GPS
- Tor onion access, no IP address ever logged in clear, AGPL-3.0 licence
- Vue 3
- TypeScript
- Node.js
- Socket.IO
- Redis
- libsodium
$ git checkout side/proximaSide project 01 / 03The chat that remembers nothing.
An anonymous, real-time, ephemeral proximity chat. No account, no persistent data: you join, talk with people within 75 km, close the tab — nothing is left.
- Every room and private message end-to-end encrypted — X25519, XSalsa20-Poly1305 via libsodium
- Geospatial presence with Redis GEOSEARCH, towns of 5 countries geocoded without GPS
- Tor onion access, no IP address ever logged in clear, AGPL-3.0 licence
- Vue 3
- TypeScript
- Node.js
- Socket.IO
- Redis
- libsodium
Or leave a message
$ git commit