Freelancer profile translated to English.
Back to original languageAbout Jérôme
Former CTO, still a developer. You entrust me with a project, I deliver it: scoping, architecture, development, deployment.
I have built systems that matter: a national program for the digitalization of criminal proceedings, business applications with 60,000 users/day, a distributed infrastructure supervised 24/7. And I managed them: technical roadmap, team of 7, budget.
How I work:
• End-to-end project: you have a need and no one to lead it.
• Backend team reinforcement: deliver on a busy roadmap, autonomously.
• Codebase takeover: understand the existing, stabilize, evolve.
• Architecture & performance: API design, scaling, database and infrastructure optimization.
• Industrialization: transform a prototype or automation into a reliable service: queues, error handling, monitoring, cost control.
Stack: Node.js, TypeScript, PHP, PostgreSQL, Oracle, Docker, Kubernetes, CI/CD.
I deliver what I code: infrastructure, deployment, and monitoring included.
Available immediately, 100% remote.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Terminal FinanceFull-Stack Developer (React / Next.js)DIGITAL AND ITOctober 2024 - December 2025 (1 year and 2 months)Contributed to the development of a decentralized exchange (DEX) on Ethereum and L2 networks, focusing on frontend architecture, Web3 integrations and infrastructure automation :• Built the user interface and critical application flows using React and Next.js.• Designed and implemented an automated infrastructure architecture (Coolify, Docker, VPN) enabling secure and streamlined deployments.• Implemented an advanced data fetching and caching strategy combining React Query with Next.js native caching for high-performance applications.• Integrated Web3 interactions end-to-end: wallet connection, transaction signing, and on-chain execution.• Configured and managed Firebase to power a real-time points system and leaderboard
- NodeGuardiansCTO & Head of DevOps – Web3 Learning PlatformEDUCATION AND E-LEARNINGJune 2022 - January 2026 (3 years and 7 months)Led the development and operations of a Web3 learning platform focused on blockchain programming languages (Solidity, Cairo, etc.).• Designed and implemented the platform architecture, based on a Strapi headless CMS and a React / Next.js frontend.• Led backend development and contributed to key product features.• Managed and mentored a team of ~10 engineers and contributors.• Built and operated the blockchain infrastructure (nodes, validators, RPC endpoints).• Managed and maintained the Kubernetes infrastructure supporting the platform.• Optimized and maintained a PostgreSQL database, used for application data, reporting and Grafana dashboards.• Established engineering workflows and development processes to improve collaboration and delivery.• Participated in Web3 governance processes (protocol monitoring, proposal analysis and voting).• Oversaw infrastructure budgeting, resource planning and cost optimization.
- French National Gendarmerie (Ministry of the Interior)Software Architect / Backend DeveloperDEFENSE AND MILITARYMarch 2020 - June 2022 (2 years and 3 months)Issy-les-Moulineaux, FranceContributed to the implementation of the Digital Criminal Procedure initiative, aimed at digitizing legal case files and enabling direct transmission to the Ministry of Justice.• Designed and modeled the software architecture of the system.• Developed a Node.js REST API and upgraded an existing PHP application.• Implemented integration with S3-compatible storage for secure storage of digitized case files.• Designed and implemented a hybrid cryptographic protocol for document encryption.• Set up automated testing and CI/CD pipelines using GitLab.• Built an ELK stack (Elasticsearch, Logstash, Kibana) for monitoring and log management.
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Education
- PROFESSIONAL SCRUM DEVELOPER CERTIFICATIONPROFESSIONAL SCRUM DEVELOPER CERTIFICATION
- Bachelor's Degree, Computer ScienceConservatoire National des Arts et Métiers2011Licence, Informatique