// hi, I'm
Alexandre Mathieu.

Full-Stack Developer @ ACD Groupe(Permanent (CDI))

Sep. 2025 → present

Aix-en-Provence, France · Remote·Software publisher for chartered accountants and their clients·Team of 6 developers

• Technical lead for e-invoicing since March 2026: owning the topic in the context of the French e-invoicing reform. Development and integration of connectors, company registration management, invoice lifecycle management, regulatory watch, centralizing the team's knowledge. 250+ pilot customers supported during the test phase.
• Customer access management overhaul: migrating the module from the desktop client (WinDev) to the web (.NET). Full design and implementation of the administrator account registration flow (≈ 1/3 of the project scope).
• Full-stack development on both products of the group — web application (.NET) and desktop application (WinDev) — back end, front end and database.
• Technical interface with customers on e-invoicing topics and product evolutions.

Developer @ PACK Solutions(Apprenticeship)

Mar. 2023 → Aug. 2025 · 2.5 yrs

Les Angles, France·Life-insurance management delegation·Architecture team · 4 developers + lead architect

• Critical batch optimization for the company's biggest client: complete rework of a data-processing job, cutting execution time by 67% (from 2h to ~40 min over 120,000 rows).
• Database migration from Oracle PL/SQL to PostgreSQL: contributed to porting the schema, stored procedures and the data-access layer.
• Angular front-end migration from v12 to v19: 7 major version upgrades, code adaptation, handling breaking changes.
• Development and maintenance of data-processing batches (Java/Spring) for life-insurance business processes.
• Maintenance and development of SOAP and REST APIs on the business information system.
• Writing technical specifications for upcoming projects.
• PoC for AI-driven test automation: automating UI journeys in a business application.
• Methodology: Agile / Scrum, Jira, pair programming.

Back-End Developer @ Yelloh! Villages(Client academic project · ESIEA)

Mar. 2022 → Jul. 2022 · 5 months

Client: high-end campsite chain (~90 sites across Europe)·Team of 4 developers · 12h / week

• Web application for building dynamic maps of the group's campsites — markers, zones, points of interest (premium areas, restaurants, pools...). A headquarters tool to manage the maps of the whole network.
• Design and full development of the back-end API in vanilla Java JEE (no framework) and the associated PostgreSQL schema.
• Contributed to integrating Leaflet into the Angular front end (interactive maps, markers, zones).
• Multi-role management system: headquarters administrators + "mapper" users in charge of customizing the maps.
• Client methodology: bi-monthly meetings with Yelloh! headquarters, monthly demos, formal specifications.
• Shipped to production on the client's servers.
• ESIEA Tech'Day award winner — annual class project showcase, grade 36/40.