Julien Gestin

IT DELIVERY AND EXECUTION TASKS :

• Designed and developed a full-stack application (Blind Test & Quiz) using NestJS (API) and Next.js (frontend), including voice recognition capabilities.

• Built a License Management System from scratch, covering architecture design, backend services, and user workflows.

• Implemented GitOps deployment and infrastructure automation using ArgoCD and AWS CDK, improving deployment reliability and repeatability.

• Refactored backend and frontend to ensure end-to-end type safety, restructured GitLab CI pipelines, and consolidated the codebase within an NX monorepo to improve maintainability and developer productivity.

IT DELIVERY AND EXECUTION TASKS :

• Backend technical referent, owning critical architecture decisions, complex debugging, and N3 production incidents.

• Led optimisation of the Node.js performance engine for a high-traffic platform (millions of page views per day), ensuring a 99.9% SLA and improving API latency and throughput.

• Developed high-performance APIs with Fastify and built front-end features using Next.js within a fullstack environment.

• Drove platform stability across a multi-cloud (AWS / Scaleway) environment by reducing high-severity incidents and strengthening observability and incident response.

• Improved CI/CD pipelines and deployment workflows, cutting release time and increasing delivery reliability.

ORGANIZATIONAL AND OPERATIONAL LEADERSHIP :

• Partnered with the CTO on technical hiring: defining profiles, conducting interviews, and evaluating senior engineers.

• Owned team OKRs and delivery KPIs (quality, lead time, reliability), ensuring alignment between product and engineering.

• Designed and developed integration bridges between SAP and multiple applications, ensuring reliable data synchronization.

• Built fullstack features using Angular, Node.js, Symfony, and MySQL.