Tech Lead and architecture
Product framing and specification, software architecture (clean architecture, DDD, microservices), CI/CD and DevSecOps, team leadership and upskilling.
References: EDF, Totem
Jérémy Gay
Freelance Tech Lead · Fullstack, DevOps & Data
LinkedIn: linkedin.com/in/jeremygay22 · Book a call: calendly.com/jeremy-exostic/30min · Online profile: exostic.com/en/jeremy_gay_freelance
- Experience
- 14 years of software development, 10 years of technical leadership and entrepreneurship
- Location
- Châtelaillon-Plage, near La Rochelle, France · remote across France
- Engagement
- Time and materials or fixed price, invoiced by EXOSTIC SAS: no umbrella company needed
- Languages
- French native · professional English (written, read, spoken)
In short
A developer since 2012 and the founder of Exostic since 2015, I work as a Tech Lead or senior developer on products with demanding technical stakes: architecture, TypeScript fullstack development, cloud platforms and data pipelines. I have worked for large companies (EDF, Enedis), scale-ups (Shine, Totem, Kidizz, Preligens) and startups, always with the same goal: ship a reliable, measurable and maintainable product.
What I can do for you
Fullstack development
Node.js and TypeScript APIs (NestJS, Express, GraphQL), React, Vue.js and React Native front ends, PostgreSQL, MongoDB and Redis, unit and integration tests.
References: Kidizz, Totem, Mr Arthur
DevOps and cloud
AWS (EKS, Lambda, Aurora, CloudFront) and Google Cloud, Kubernetes, Docker, Terraform, GitLab CI and GitHub Actions, monitoring with Prometheus, Grafana and Loki, zero-downtime migrations.
References: Kidizz, Preligens
Data engineering
Google Cloud Dataflow, Apache Airflow and DBT pipelines, Looker and Metabase reporting, fraud detection and compliance in a banking environment.
References: Shine, Totem
IoT and real time
Connected devices (LoRa, MQTT), WebSocket, real-time service platforms, embedded interfaces.
References: Free2Move, ALOES
Training and mentoring
JavaScript, React, Git, Linux, MongoDB, Kubernetes and OpenShift, for schools (Centrale Nantes, IMEI) and company teams.
References: Centrale Nantes, IMEI, EDF
How I work
- 1
Iterate
Short iterations and regular deliveries, to get feedback early and adjust priorities.
- 2
Secure
Tested (TDD, integration tests), documented and automatically deployed code from day one.
- 3
Communicate
Transparent communication with the team and stakeholders, in French or English.
- 4
Hand over
Documentation, workshops and pair programming so the team stays autonomous after the assignment.
Recent assignments
Shine
Senior Data Engineer
Since April 2025
- Improvement of banking fraud detection systems.
- Data projects supporting regulatory compliance.
- Design and operation of data pipelines, reporting in Looker.
Mr Arthur
Software Engineer
Dec 2024 – Jan 2025
- Development of the Android application.
EDF
Tech Lead
Nov 2023 – Nov 2024
- Product specification: analysis, emission factors, calculation rules, API design and functional requirements.
- Architecture, development and hardening of a Node.js and TypeScript API following clean architecture, DDD and TDD principles.
- Continuous integration and deployment pipeline with security and testing tools (DevSecOps).
- Kubernetes and OpenShift training for the team, documentation, Big Data scripts and analyses.
Enedis
Software Engineer
Jul – Sep 2024
- Analysis dashboard and agent-based simulations, linked together.
Totem
Tech Lead / Product Engineer
Jan 2021 – Sep 2022
- Product specification, improvements to the architecture, the payment system and the continuous deployment pipeline.
- Mobile application development, stock management and control of connected coffee machines.
- Data engineering, monitoring and caching setup, workshops and pair programming with developers.
Preligens
Developer / DevOps
Oct – Dec 2020
- Cloud software architecture, continuous deployment with GitHub Actions and Docker Swarm, AWS infrastructure with Terraform.
Kidizz
Developer / DevOps
Dec 2018 – Sep 2020
- Migration of Node.js and Ruby on Rails applications to a managed AWS environment (EKS, Aurora) with no service interruption.
- Monolith split into microservices, Node.js/GraphQL API for web, mobile and admin.
- GitLab and Kubernetes continuous deployment, monitoring, network security, multi-AZ deployment and serverless video encoding.
Free2Move
R&D Engineer
Mar 2017 – Apr 2018
- Real-time IoT service platform for vehicles: parking booking, electronic tolling, driving context analysis.
- In-car interfaces, on-the-fly billing and payment, AWS microservices and serverless architecture.
ALOES
R&D Developer
Jan 2017 – Jan 2019
- IoT state of the art, specification of a connected device and development of a platform for designing connected devices.
Earlier career
- Exostic, since 2015 — Founded and run the company: consulting, training (IMEI, Centrale Nantes, companies), front-end development of a real-time precious metals trading site, isomorphic React landing page generator, WebSocket server for Unity games.
- Freelance, 2014 to 2015 — Real-time monitoring MVC framework (Node.js, Socket.IO, Redis), AngularJS web apps, programming courses for beginners.
- Toxicode, 2012 to 2014 — Real-time multiplayer game framework in Node.js, programming learning game, educational applications, JavaScript and Node.js training.
- Acadomia, 2010 to 2011 — Mathematics and physics teacher.
Skills
Languages
Back-end
Front-end and mobile
Data
Cloud and DevOps
Architecture and methods
Security
IoT
Education
- 2012 — Master's degree in digital creation and publishing, Université Paris 8
- 2010 — Bachelor's degree in fundamental physics, Université Paris 11
- 2008 — Materials and nanotechnology engineering school, INSA Rennes
- 2007 — Preparatory classes (Math Sup / Math Spé), Lycée Léonce Vieljeux, La Rochelle
A need, an assignment?
Let's talk for 30 minutes, no strings attached. The detailed, position-by-position resume is available here.
Book a call jeremy@exostic.comcalendly.com/jeremy-exostic/30min · jeremy@exostic.com · +33 6 78 14 96 81