Defensive security engineer (F/N/H)
Build and operate the core Cyber Defense capability for Leboncoin, a major French platform.

Paris, France · Founded 2006 · 201-500 staff
Leboncoin.fr is a leading French online classifieds and marketplace platform that connects buyers and sellers for a wide range of products and services including automobiles, real estate, consumer goods, and services. Operating as one of France's most visited e-commerce sites, it provides a user-friendly platform for peer-to-peer transactions and business-to-consumer sales across multiple categories.
Roles based in: Paris UFO
Builds in: E-commerce · Infrastructure · DevTools
Hiring engineering roles here since July 2026
Curated from live Leboncoin postings. Click any role for the full brief.
Build and operate the core Cyber Defense capability for Leboncoin, a major French platform.
Develop robust backend services for Leboncoin's Maps feature using Golang and microservices.
Secure AWS cloud infrastructure and CI/CD pipelines for Leboncoin's high-traffic marketplace using DevSecOps principles.
Build and maintain robust backend services for Leboncoin's Real Estate squad using Golang.
Scale and optimize Leboncoin's infrastructure on AWS using IaC (Terraform/Ansible) for millions of users.
Manage and evolve AWS infrastructure for Leboncoin, a top 5 French site, using Infrastructure as Code.
Design and maintain critical Go microservices for Adlife, managing millions of user-generated listings.
Build scalable quality systems for Real Estate Rental platform using AI and modern testing frameworks.
Manage the CI/CD and Developer Experience platform for Leboncoin's 600 engineers, focusing on delivery reliability.
Lead the Engineering Manager for Spark, a multi-platform design system (React/TS, Swift, Kotlin), driving adoption and technical vision.
No longer open on Leboncoin's site. Kept for reference — saved archived roles stay in your dashboard.
Design and build critical identity services for Leboncoin's 28M+ users using Golang, microservices, and Kafka.
Develop robust Android features for Leboncoin's Maps platform to revolutionize local search experience.