Freelancer profile translated to English.
Back to original languageAbout Sylvain
ISEN engineer by training and senior full-stack developer (7+ years of experience), I support startups, scale-ups, and large companies in the creation and scalability of modern web applications in Node.js / React / GraphQL.
I designed and developed a SaaS platform from scratch generating €50k in MRR, while also working for major international groups, particularly in Canada, where I learned to deliver robust, documented, and maintainable code in demanding environments.
💡 What I Offer
Complete full-stack development (React, Node.js, GraphQL, TypeScript, PostgreSQL, Docker)
Architecture & technical refactoring: microservices, API Gateway, performance optimization, security
Technical steering & mentoring: lead dev / tech lead, team structuring, CI/CD, code review
Technical audit / MVP / Scale-up: strategic and technical support throughout the product lifecycle
Product vision: business-oriented approach, fluid UX and user focus
⚙️ Stack & Skills
Front: React, Next.js, Redux, Tailwind, Ant Design, Apollo Client
Back: Node.js, Express, Apollo GraphQL, TypeScript, Javascript, Nest js
Infra / DevOps: PostgreSQL, MySQL, Redis, Docker, AWS / GCP, CI/CD
Other: WebSockets, Auth (JWT/OAuth), unit & e2e tests, observability
🌍 International Experience
Canada: participation in web projects for large companies (media, then banking sectors)
Collaboration with multicultural teams and remote agile project management during COVID
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- ExoTeachCo-founder & CTO (Full Stack)EDUCATION AND E-LEARNINGJune 2020 - Today (6 years)Montpellier, FranceDesign, development, deployment, and maintenance of web and mobile applications from scratch for a young French startup.Technical Stack:- Frontend: React, Redux, GraphQL, Capacitor- Backend: Node.js, Express, GraphQL, PM2, Docker, MySQL, Redis
- Banque Nationale du CanadaSenior Web/Mobile DeveloperBANKING AND INSURANCEMarch 2020 - June 2020 (3 months)Montréal, CanadaSenior Web Developer, Agile Scrum team, on the main application used by clients. Primarily front-endStack:React, Redux saga, GraphQL (Apollo, Node.js), Spring Boot, Netflix Hystrix, Redis, Docker, Openshift, MongoDB, Apache Kafka, Splunk, Datadog
- AlithyaJava DeveloperCONSULTING AND AUDITSApril 2019 - February 2020 (10 months)Montréal, CanadaAgile scrum work environment, 3-week sprints.- CI/CD with Jenkins, deployments in Azure Cloud, and AWSTech stack: Java 8, Spring Boot, Docker, Jenkins, Ansible, CI/CD, JMS, MongoDB, Solr, ELK, JUnit, Maven, Git, Sonarqube, Selenium, JIRA, Bitbucket, Confluence.Front-end: React, Redux, TypeScript
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Education
- Engineering degreeISEN Yncréa Méditerranée2018Diplôme d'ingénieur Français ISEN. spécialité Big Data & Cloud Computing.
- Master's degree in Computer EngineeringUniversity of Sherbrooke, Canada2018- Développement agile - Développement sécurisé - Sécurité système avancée - Sécurité Web avancée - Techniques de cryptographie avancées - Gestion de projets en ingénierie - Analyse financière - Négociation et gestion de différend
Certifications
- CCNA 1CISCO2017
- CCNA 2CISCO2017