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Vincent G.VG

Vincent G.

Fractional CTO | Fullstack Lead | Lean Engineering

On-demand
Paris, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Vincent

Lead Fullstack Developer with over 16 years of experience, I assist companies in defining and implementing effective technology strategies. My goal is to precisely align technical choices with business challenges, while ensuring quality, scalability, and maintainability of solutions.

Passionate about continuous improvement, I rely on the fundamentals of Software Craftsmanship: SOLID, DDD, Clean Architecture, and TDD. Constantly monitoring technology, I actively explore the opportunities offered by generative AI to optimize processes, enrich products, and develop new features.

Comfortable in all sizes of organizations, I notably built and supervised the technical team of Gojob (growing from 5 to 15 devs) by establishing high standards of quality. I extended this experience on a large scale at Jellyfish, by piloting continuous improvement with around fifty engineers, strengthening their skills, standardizing technical practices, and optimizing development processes. Finally, I was able to leverage my "core" technical skills on a very large (international) scale for Binance, the world's largest cryptocurrency exchange.

My key expertise:
✅ Fullstack development: TypeScript, React, Node.js.
✅ Vision & Architecture: Designing robust software architectures. Strategic infrastructure choices.
✅ Process, engineering & DevOps: Optimization of CI/CD pipelines, (clean) Agile practices, reduction of technical debt.
✅ Technical & human leadership: Mentoring, upskilling teams, continuous learning culture (Lean Management).
✅ Product Strategy: Active contribution to product evolution (UX/UI), collaborative workshops around business needs.

  • English

    Native or bilingual

  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Binance
    Senior Lead Developer
    September 2022 - Today (3 years and 9 months)
    Paris, France
    Binance is the world’s leading blockchain and cryptocurrency infrastructure provider with a financial product suite that includes the largest digital asset exchange by volume. Trusted by millions worldwide, the Binance platform is dedicated to increasing the freedom of money for users.

    ∙ Promoted engineering best practices at scale — Internal talk attended by dozens of developers, sharing actionable insights on clean architecture and automated testing in Frontend, and delivery workflows.
    🎯 Goal: Foster a shared engineering culture and elevate code quality across teams.

    Developed features for both desktop and mobile platforms — Contributed to user-facing functionalities in a high-traffic, high-stakes environment.
    🎯 Goal: Deliver secure, performant features that scale with user needs.

    Led R&D initiatives on internal tools — Explored infrastructure automation and applied generative AI to streamline developers' workflows.
    🎯 Goal: Improve developer productivity and reduce time-to-delivery, guided by user feedback and measurable outcomes.

    ∙ Launched internal tooling projects — Built platforms and utilities applying robust software design principles such as TDD and Hexagonal architecture.
    🎯 Goal: Provide reliable, maintainable foundations for engineering teams.
    Leadership TDD React.js Typescript NestJs Playwright Nx Monorepo Microservices Amazon Web Services Generative AI Next.js
  • Jellyfish
    Senior Engineering Director
    PRESS AND MEDIA
    March 2021 - September 2022 (1 year and 6 months)
    Paris, France
    Jellyfish is a digital partner to some of the world’s leading brands, including Uber, eBay, Nike, Samsung, Google, Spotify, Ford, Aviva Investors and ASOS.

    Within the JTS (Jellyfish Technology Solutions) capability, I provide a deep expertise and technical leadership, helping 6 squads to improve software/engineering practices with a particular focus on:

    Quality by construction: Automated tests, TDD, Continuous integration, Software architecture (Ports & Adapters pattern, SOLID principles)...
    🎯 Goal: Fewer defects via a zero-bug mindset (as a target, not a KPI); happier, more confident teams.

    Reliable delivery: Efficient git workflow, Deployment pipelines, Continuous deployment/delivery, Dark launching...
    🎯 Goal: Multiple daily deployments, fast recovery; smoother, stress-free releases.

    Continuous improvement: Pair and Mob programming, Workshops...
    🎯 Goal: Raising technical standards across teams; higher team retention.

    Team collaboration: Event storming, Tres Amigos, Example Mapping, User story mapping, Feature slicing, Writing (and implementing) acceptance criteria...
    🎯 Goal: Stronger domain understanding, better alignment, higher engagement.

    👨‍💻 Stack (when hands-on): TypeScript, React, Node.js, Nestjs, Jest, Firebase, Google Cloud Platform (Cloud Run, Functions, Build, Pub/Sub, etc.)
    Lean management TDD Microservices DDD Méthode agile Typescript React.js NestJs Amazon Web Services Google cloud
  • Gojob
    Senior lead developer
    HUMAN RESOURCES
    February 2018 - February 2021 (3 years and 1 month)
    Aix-en-Provence, France
    Gojob is a two-sided marketplace that connects temporary workers with companies.

    ∙ Defined and promoted engineering best practices — TDD, SOLID principles, Hexagonal Architecture.
    🎯 Goal: Consistent code quality and maintainability across teams.

    ∙ Contributed to product design and specifications — Participated in functional workshops, created and reviewed user stories.
    🎯 Goal: Better alignment between product and tech, reducing rework and ambiguity.

    ∙ Delivered full-stack features — Built and maintained REST & GraphQL APIs (NestJS), as well as frontend components (React).
    🎯 Goal: Rapid delivery of reliable, user-facing features.

    Mentored developers and led knowledge-sharing initiatives — Supported junior devs, facilitated internal/public workshops and meetups.
    🎯 Goal: Team growth, stronger engineering culture.

    ∙ Led technical hiring — Created coding assessments, conducted interviews, and helped scale the team.
    🎯 Goal: Attract and onboard top engineering talent.

    Managed a team of 3 to 5 developers — Oversaw delivery and individual progression.
    🎯 Goal: High-performing, autonomous squads.

    👨‍💻 Stack : TypeScript, React, Redux, Node.js (Express / NestJS), GraphQL (Apollo), Jest, PostgreSQL, Google Cloud & Kubernetes (Docker)
    TypeScript JavaScript Node.js React GraphQL Google cloud Elasticsearch PostgreSQL MongoDB Express Firebase Git GitHub Management d'équipe

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Education

  • Diplôme d'ingénieur en Alternance
    Université Paris XI - Polytech Paris Sud
    2013
    Diplôme d'ingénieur, spécialité informatique, en alternance (entreprise d'accueil : Arianespace). TOEIC (940/990, juin 2012)

Certifications

  • TOEIC (940/990)
    ETS Global
    2012
    Anglais

Skill set

Categories