Freelancer profile translated to English.
Back to original languageAbout Fabien
Cloud and back-end engineer with 9 years of experience in architecture, development, and deployment of back-end services.
I am available to carry out your projects (regardless of their complexity), help you make technological choices, or maintain and evolve your existing services, whether on a microservices or monolithic architecture.
My expertise:
- Back-end development (GraphQL/REST), Typescript or Golang depending on needs
- SQL (Indexes, Advanced Joins, CTE, Window functions, Query planner)
- Monitoring (Logging, Exceptions)
- CI/CD (Circle CI, Github Actions, Concourse, Jenkins)
- Microservices architecture
- Consideration of front-end issues
What I'm looking for:
- Technical challenge
- Modern stack
Feel free to check out my latest project on GitHub (merlin), which will give you a good overview of my skills.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 10km)
Experience
- LeboncoinBack-end engineerE-COMMERCEMay 2022 - Today (4 years and 1 month)Paris, FranceDesign, architecture, and development of back-end microservices within Leboncoin.- Lead and develop the transition from a monolithic ETL to a microservices architecture enabling the integration of professional client ads- Consider high availability requirements in the design of microservices to ensure system robustness and reliability.- SQL/RAM/CPU optimization of existing servicesTechnical Stack:- Golang (gin)- REST- AWS SNS/SQS & Kafka (Message broker)- PostgreSQL (AWS RDS)- Microservices architecture (Kubernetes deployed on AWS)- Zuul/Concourse (CI/CD)- Monorepo
- HabxBack-end engineerREAL ESTATESeptember 2018 - March 2022 (3 years and 7 months)Paris, FranceDesign, architecture, and development of back-end services within Habx, a proptech startup innovating in the off-plan property sales sector by offering alternatives for apartment layouts (up to 16) for each unit in a development, compared to the standard single layout.Development and maintenance of 12 microservices leveraging 3 technologies depending on use cases:Golang -> High-traffic services with a real need for performance (e.g., webhooks/logical SQL replication)Typescript -> Business services (management of apartment plans, reservations, 3D apartment renderings)Python -> Various tools/scripts executed on demand (via Jenkins)Technical Stack:- Node.js (koa)- Golang (gin)- GraphQL (apollo server/gqlgen)- AWS SNS/SQS (Message broker)- PostgreSQL (AWS RDS)- Microservices architecture (Kubernetes deployed on AWS)- CircleCI
- MobeelityFullstack engineerTRANSPORTATIONSeptember 2017 - July 2018 (10 months)Paris, FranceDesign and implementation of serverless functions within Mobeelity, a mobility/transport startup innovating in the public transport sector for businesses.Fullstack development on 2 main technologies:Typescript:- Cloud functions (Serverless Firebase) for managing user actions and the carpooling algorithm- Job scheduling (NodeJS) for synchronizing Velib/Autolib stations via OpenData- REST services (NodeJS) for exposing Velib/Autolib stations to Firebase cloud functions- MongoDBSwift (iOS):- Observer Pattern (Real-time via Firebase Realtime Database)- Geo-tracking (CoreLocation/CoreMotion)- Extensive use of the Google Maps SDK- Use of Google Directions and Geocoding APIs- Push notifications- Autolayout- DeepLink
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Education
- Bachelor - Mobile Application EngineeringEcole Supérieure de Génie Informatique (ESGI)2015
- Master - Mobility and Connected ObjectsEcole Supérieure de Génie Informatique (ESGI)2017