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Hi, I’m

Sébastien Gineste

Lead Software Engineer

I design and operate secure, scalable platforms for critical AI applications in healthcare, from infrastructure to production.

  • Healthcare AI
  • Distributed systems
  • Scalable platforms
  • Reliability & observability
Get in touch
Montpellier, France

My journey

About me

LeadSoftware engineer, I design and operate secure, scalable platforms for critical AI applications in healthcare, from infrastructure to production.

Focused on distributed systems, reliability and observability, I design robust architectures under strong security and compliance constraints, and lead projects end to end.

I also help teams adopt agile practices and align architecture across teams.

Education

  1. 2018 – 2020

    Computer Science degree

    University Institute of Technology, Montpellier.

  2. 2020 – 2023

    Engineering school

    Polytech Montpellier — computer science and management.

Experience

  1. 2025 – present

    Lead Software Engineer — Montpellier University Hospital

    Design and operation of AI-powered applications for healthcare professionals, with a strong focus on reliability, security and integration with the hospital information system.

  2. 2023 – 2025

    Software Engineer — Teads

    Architecture of a domain-oriented backend platform (Scala, gRPC): monolith decomposition, distributed-systems migrations (Kafka, Elasticsearch) and cross-team authentication standardization.

My skills

The technologies, platforms and methods I use on a daily basis.

  • Languages & Frameworks

    • Scala
    • Python
    • TypeScript
    • Node.js
    • Angular
    • npm
  • Cloud & Infrastructure

    • AWS
    • Scaleway
    • Kubernetes
    • Helm
    • Terraform
    • Docker
  • CI/CD & Observability

    • GitHub Actions
    • ArgoCD
    • Git
    • Grafana
    • Loki
    • Alloy
  • Databases

    • MongoDB
    • PostgreSQL
    • Elasticsearch
  • Security & Identity

    • SSO
    • IDP
    • MFA
    • JWT
    • Security
  • Generative AI

    • Generative AI
    • AI agents
    • RAG
    • LLM
  • Architecture & best practices

    • DDD
    • Hexagonal architecture
    • Clean code
    • Event-driven
  • Testing & Quality

    • Unit testing
    • End-to-end testing
    • Contract testing
    • TDD
  • Methods & Collaboration

    • Agile
    • Scrum
    • Project management
    • Roadmap
    • Design document

My articles

Technical writing on software engineering, testing and architecture.

  • Software EngineeringTest StrategyCode QualityMedium

    Stop Mocking Everything: The 3 Tests I Start With for a Service

    A practical testing strategy for backend services — fewer tests, more confidence, starting with unit, contract and E2E instead of mocking everything.

    Written in English14 min read
    Read on Medium

My projects

A selection of projects and internships built throughout my journey.

17 results

  • Web application — Cloud Storage Audit Tool
    Industrial project02/2023 · 2 months · CGI · FranceTeam: 2

    Web application — Cloud Storage Audit Tool

    Auditing the environmental cost of data stored on a drive and running deletion policies.

    • HTML/CSS
    • NestJS
    • Angular
    View details
  • Web application — PolyConquest
    Industrial project2022 · 2 months · Polytech Montpellier · FranceTeam: 3

    Web application — PolyConquest

    Serious algorithmics game shipped as a VS Code extension.

    • Node.js
    • NestJS
    • Pixi.js
    View details
  • VR game — Numbers & Letters
    Internship2022 · 2 months · Ulster University · Northern IrelandTeam: 12

    VR game — Numbers & Letters

    1st prize — GALA 2022

    Serious virtual-reality game, awarded at the GALA conference.

    • Unity3D
    • C#
    • VR
    View details