Freelancer profile translated to English.
Back to original languageAbout Kevin
Senior Backend & DevOps Developer,
I undertake missions with a defined scope, clear deliverables, and 100% asynchronous work.
My core value: designing robust APIs, integrating operational AI agents, and setting up reliable GCP/Kubernetes infrastructures frictionlessly, without unnecessary meetings.
Main Stack:
→ Backend: NestJS, Node.js, TypeScript, Symfony
→ Cloud & Ops: GCP (GKE, Cloud Run, BigQuery), Kubernetes, Terraform, ArgoCD
→ Applied AI: LangChain, LangGraph TS, RAG, autonomous agents
What I bring concretely:
– NestJS APIs in production on GKE, high-traffic environments
– LangGraph AI agents integrated into real business workflows
– GCP infrastructure provisioned with IaC (Terraform), ArgoCD CI/CD pipelines
– Total autonomy: 8 years of managing complex systems in a military environment before transitioning to software development
I work on a fixed-price basis: scope defined together, delivery on time, zero follow-up required.
Available evenings and weekends, guaranteed response within 2 hours on weekdays.
Ideal missions: technical audit, cloud setup, AI agent integration, API development.
Duration: 1 day to 3 weeks. 100% remote.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- AdictizBackend Developer | AI | DevopsENTERTAINMENT AND LEISUREOctober 2024 - Today (1 year and 10 months)Lille, France**Design & AI**:
- Led R&D, development, and production deployment of services based on Generative AI (Agents).
- Trained developers on LangChain and LangGraph for project integration.
- Designed, developed, and autonomously deployed microservices (Data+, Webhooks, Tracking, Ranking...) under NestJS/GCP capable of handling high loads.
**Data Engineering**:- Architected and fully automated ETL pipelines to BigQuery (GCP), optimizing infrastructure costs while ensuring automated data orchestration.
**Infrastructure & SRE**:- Managed Infrastructure as Code (Terraform) on GKE, implemented GitOps deployments (ArgoCD), and monitored production (monitoring, alerting) with active participation in technical on-call.
- Executed a major version upgrade and significantly reduced technical debt on the SocialShaker platform
- QuêtevalCreator of the multiplayer game QuetevalVIDEO GAMES AND ANIMATIONJune 2024 - Today (2 years and 2 months)Lille, FranceReal-Time Architecture & NestJS:
- Distributed backend with separation of concerns, including an HTTP API for business logic and isolated workers for real-time game state processing.
Frontend & Game Engine:- Nuxt 3 web client integrated with the Phaser 3 game engine.
- Self-managed K3s Kubernetes cluster on OVH VPS, provisioned via Ansible.
- Distributed architecture with a central lobby and independent worlds, using dedicated Kubernetes namespaces per tenant for isolation.
- Dual persistence strategy with PostgreSQL for transactional data and MongoDB for flexible game data.
- Prometheus/Grafana stack on the K3s cluster for real-time metrics collection.
- Automated deployments with Sealed Secrets, GitLab CI/CD for Docker images on a private registry.
- Auto iciFull Stack Node.js Developer | Symfony | Vue.jsAUTOMOBILEMarch 2023 - June 2024 (1 year and 3 months)Lille, France
- Complete overhaul of the internal CMS to a Node.js microservices architecture.
- Implementation of a high-performance full-text search engine via Elasticsearch.
- Development of administration interfaces in Vue.js/Nuxt.js.
- Maintenance and evolution of the legacy ERP (Symfony).
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Education
- Application Developer Designer - Bachelor's degree +3ISCOD2024Concepteur développeur d'application - bac +3
- Web Developer - Associate's degree +2OpenClassRooms2022Développeur web - bac +2