Alexandre GinistyBackground
A continuous path: at every step, I tried to bring what I learn closer to what I build.
Lycée Christophe Colomb, Sucy-en-Brie
The STI2D baccalauréat (sciences and technologies of industry and sustainable development) with the Information and Digital Systems option: analysing and building technical solutions that handle information flows — voice, data, images — in systems both local and remote.
That's where it all started: programming, networks, communicating systems and project management, learning by doing on real systems rather than abstract exercises.
IUT of Créteil-Vitry, UPEC
The BUT in Computer Science is built around six skills: building an application, optimising, administering communicating systems, managing data, leading a project and working in a team. With 600 hours of supervised projects over the three years.
First year: solid foundations in algorithmics, object-oriented programming, databases, web, systems and project management.
Val-de-Marne prefecture, SINUM department · BUT in Computer Science (application development track)
Two years of work-study alongside the BUT, entirely on my own: nobody in my department had a technical profile. So I took charge of everything, from design to putting the whole chain into production. A complete rebuild of the intranet's meeting-room and vehicle booking site (PHP, JavaScript), used by ~800 active workstations.
Android app to manage room inspection reports (Kotlin, Room), agile with Jira and GitHub Projects. Alongside at the IUT: Vigipol (React, D3, Chart.js), a RATP metro route calculator (Python, Flask, Dijkstra and Bellman-Ford), and the PMR app in Flutter.
Efrei Paris · degree awarded together with Université Paris-Panthéon-Assas
Three years of work-study in the Software and Information Systems major, for a state-recognised engineering degree. I moved from the BUT to the engineering cycle with a clear goal: to specialise in software development and information systems.
On the school side: software engineering, object-oriented programming, databases, algorithmics, graph theory, advanced web development, C, Java and project management. What interests me is seeing them applied the very next day on a real product.
Société des Grands Projets (SGP) — IT department (DSI), Solutions unit, Development team, S-Print team
SGP is the public body building the Grand Paris Express: 200 km of automatic metro and 68 stations. My scope is not the construction site but S-Print, the platform where contractual partners declare their economic and social footprint and their safety indicators.
I contribute to the rebuild from version 3 (Java and Vue.js) to version 4 (Symfony + API Platform, TypeScript + React): pages and components, search filters, data browsing, API calls, tests, code reviews. I work in two-week sprints (Scrum and Kanban) with Jira, Confluence, GitLab, Docker and Postman, and I've run several agile ceremonies as a rotating scrum master.
Two ways of working
My background has put me in both situations, and each taught me something the other wouldn't have.
At the Val-de-Marne prefecture, nobody in my department had a technical profile. I was alone to design, develop and above all put the whole chain of my room and vehicle booking application into production, used by about 800 workstations. I also developed a mobile room inspection app.
At the BUT, almost all my projects were done in teams. Today I'm in a team at school, and in a team at work at SGP, which matches the reality of the market: I no longer depend on myself alone, and I'm not self-taught, since my colleagues help me, review my work and make me grow.
The result: autonomous when needed, effective as a group when possible.
Review of my first year at SGP
Read S-Print 3, understand the need, rewrite it cleanly in S-Print 4, then compare field by field. Slower, much safer.
DRY, KISS, YAGNI, SOLID, explicit naming, early returns, few comments: I learned to name better rather than comment more.
A memory crash of the tests under WSL reported with the right context saves the whole team time, even without the final fix.
Understanding and documenting a complex data model spared me mistakes on every following ticket.
Rotating scrum master, a ten o'clock daily, asking for help at the right time: skills that school teaches little.
Behind every form field is a real commitment to local jobs and small businesses. Data accuracy is a priority.