Available to hire
I’m Gabriel Miro S, a Senior Full Stack Product Engineer focused on building scalable SaaS from scratch with a product-minded approach. I combine technical architecture, UX thinking, and business impact to deliver value.
I’ve led small engineering teams, built embeddable JavaScript widgets, and shipped production-ready features in remote startup environments.
Skills
Language
French
Fluent
English
Fluent
Spanish; Castilian
Fluent
Work Experience
Senior Product Engineer (Full Stack) at Told
January 1, 2023 - January 1, 2026Designed and built an embeddable JavaScript survey widget used by 1,000–5,000 clients; built a custom in-house product tour system; architected backend and handled 10M+ events per month; led a remote startup team of 10 people; implemented scalability improvements, refactoring and security best practices; co-designed UX flows for platform and widgets; developed internal back-office tools and marketing website (Framer).
Lead Full Stack Developer at Evolt
January 1, 2019 - January 1, 2023Co-designed and developed collaborative SaaS tools (brainstorming, personas, UX mapping); led a team of 4–5 developers; implemented GraphQL architecture for multiple applications; managed scalability, client-specific deployments and long-term maintainability; set up CI/CD processes and unit testing strategy (Jest); platform used by major clients (Royal Canin, SNCF, Crédit Agricole).
Tech Lead (Web3 Project) at Cosmdinos
January 1, 2022 - January 1, 2022Developed smart contracts in Solidity on Ethereum; built a custom NFT marketplace (buy/sell without OpenSea); led full-stack development of the platform; 10,000+ users and 3,000 ETH trading volume.
Full Stack Developer at Culture-Relax
January 1, 2025 - January 1, 2025Refactored legacy frontend and back-office; migrated and upgraded Strapi CMS; database migration and major feature deployments; email system integration (Mailchimp); platform reaching 400,000+ monthly visits.
Programming Instructor at Up to
January 1, 2018 - January 1, 2018Taught 25 career-transition students (3 days/week); co-designed Node.js curriculum modules; mentorship and code reviews; 95% internship placement rate.
Education
Master of Science in Software Engineering at EPITECH
January 11, 2030 - February 19, 2026Bachelor in Programming Exchange Program at Chung-Ang University (South Korea)
January 11, 2030 - February 19, 2026Qualifications
Industry Experience
Software & Internet, Professional Services, Education, Media & Entertainment
Skills
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