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Christophe LemonnierCL

Christophe Lemonnier

Software Engineer

€475/day
Zurich, CH
8-15 years

Average response time: 1 hour

About Christophe

Software Engineer with 8+ years of experience designing and delivering scalable, cloud-native
systems. Strong background across frontend, backend, and platform engineering, with a proven
ability to modernize legacy architectures and lead high-impact initiatives.
  • French

    Native or bilingual

  • Portuguese

    Native or bilingual

  • German

    Basic

  • English

    Fluent

Remote only
Primarily works remotely

Experience

  • Viibe app Gmbh
    Co-Founder (Technical Owner)
    October 2022 - September 2025 (2 years and 11 months)
    • Co-founded and led development of a cross-platform mobile app using React Native and a serverless backend (AWS Lambda + GraphQL + PostgreSQL).
    • Automated build and deployment pipelines using GitHub Actions and Fastlane for iOS and Android.
    • Built a complete CI/CD workflow, including code generation and automated testing, reducing manual deployment steps by 80%.
    • Defined technical architecture, infrastructure, and release-management processes while collaborating with non-technical co-founders.
    • The app reached ~250 users and received positive early feedback before being retired in 2025; its technology and learnings are now leveraged in future projects.
    React Native DevOps Node.js Serverless Terraform
  • DataGalaxy
    Software Engineer (Technical Leadership Role)
    August 2021 - September 2025 (4 years and 1 month)
    • Architected and developed scalable backend services using .NET, Node.js (TypeScript), and PostgreSQL.
    • Led DevOps initiatives using Azure DevOps, Kubernetes, Helm, Terraform, and FluxCD.
    • Revamped build and deployment pipelines by creating custom generic templates, improving consistency, reducing maintenance, and accelerating delivery.
    • Collaborated on introducing Domain-Driven Design (DDD) principles leveraging DAPR, to improve maintainability and testability of core APIs.
    • Led the team implementing authentication with Keycloak, using OAuth2 and JWT, standardizing access management across services.
    • Transformed API exposure from a classic NGINX setup to Kong API Gateway, delivering custom plugins for authentication, rate limiting, and request transformation to ensure compatibility with legacy contracts.
    • Coordinated load and performance testing using Grafana k6 and k6-operator to validate scalability and reliability.
    • Mentored developers through pair/mob programming, facilitated technical reviews, and led technical interviews and candidate assessments to strengthen the engineering team.
    Terraform Node.js DevOps Authentification Coaching and mentoring
  • S4M
    Software Engineer
    October 2020 - August 2021 (10 months)
    • Developed full-stack web applications using Spring Boot, Node.js, PostgreSQL, React.js, and Vue.js.
    • Initiated the migration of the frontend from Vue.js to React, introducing a micro-frontend architecture for modular scalability.
    • Worked on geoJSON data processing and integrated Mapbox and OpenStreetMap (OSM) APIs.
    • Managed containerized environments with Kubernetes and ArgoCD to ensure scalable, fault-tolerant deployments.
    Node.js PostgreSQL Vue.js Spring boot DevOps

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Education

  • Electrical Engineering and Industrial Computing
    Sorbonne Paris Nord
    Electrical Engineering and Industrial Computing

Skill set

Categories