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Maxime GrisMG

Maxime Gris

Lead Tech Fullstack & AI | From Idea to Product

€550/day
Nantes, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Maxime

You have a product to build, a codebase to audit, AI to integrate, or need to strengthen your teams. You're looking for someone who understands the business, who plans before coding, and who delivers without technical debt. That's what I do.


Developer for 15 years, co-founder of SaaS products that started from MVPs delivered in a few weeks and generated several million euros in revenue. From startups to large corporations - I adapt to your context in days, not weeks, solo or within your teams.

🎯 Product from A to Z
You have the idea, I challenge and build it. Product scoping, architecture, development, deployment. We define the scope that proves value, we deliver, we iterate. Time & materials or fixed price, depending on your context.

🔍 Technical Audit & Project Rescue
Your codebase has become unmanageable? Audit delivered in 5 days: assessment, prioritized debt, immediate quick wins, costed action plan. I can also take over development to get the project back on track, in firefighter mode.

🤖 Artificial Intelligence
AI agents, RAG on your data, business workflow automation, content generation, sovereignty. Claude API, OpenAI, LangChain, n8n, pgvector & co - integrated properly into your products.

👥 Reinforcement & Tech Lead
I integrate into your teams to develop, lead, or mentor. I enjoy sharing my knowledge. I adapt to your organization, based on your needs.

🛠️ React, Next.js, TypeScript, Node.js, NestJS, Java, AWS, GCP, Terraform, CI/CD & many others. Technology is a means, not an end!

💡 Why me?
I'm not a developer who executes a spec sheet. I think business & domain before code. I have the seniority to make the right technical decisions from the start and the field experience to deliver quickly without sacrificing quality.

Describe your situation in a few lines - I'll respond within 1 hour with an initial analysis.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Nantes (up to 50km), Lyon (up to 50km), Paris (up to 50km), Bordeaux (up to 50km), Toulouse (up to 50km)

Experience

  • IMAGroupe
    Lead Front-End Tech
    BANKING AND INSURANCE
    June 2025 - Today (1 year and 2 months)
    Niort, France
    → Objective: Support the development and adherence to front-end technical standards for a strategic project involving 60 people organized into 5 agile squads.

    → Achievements:
    • Definition and maintenance offront-end standardsacross the entire project (conventions, reviews, templates)
    • **Inter-squad architecture arbitration**: shared components, state management, testing strategy
    *CI pipeline optimization- reducing build time by ~35%
    • Participation in development and skill enhancement of teams

    → Technical Stack: React, Electron, BFF, TypeScript, GitLab CI
    Front-End Development Tech Lead React.js Node.js Claude
  • EasyNode
    Co-founder & CTO
    SOFTWARE PUBLISHING
    January 2024 - Today (2 years and 6 months)
    Paris, France
    → Objective: Design and manage a NaaS (Node-as-a-Service) service from scratch as CTO, from the very first commit.

    → Achievements:
    • **MVP delivered in 2 weeks**, from idea to first paying customer
    *€1,000,000in revenue in the first fiscal year (EBITDA €400,000)
    • Multi-region infrastructure supporting30,000+ nodesand 15,000+ clients
    *Scalable cloud architecturefrom the start, zero major rewrites, controlled costs
    • Recruitment and structuring of the technical team

    → Technical Stack: React.js, NestJS, Python, GCP, Solidity, Clean Architecture, AI Agent, MCP x402
    React.js CTO Prometheus NestJs AI Agent
  • Backupta
    System Architect / Fullstack Tech Lead
    SOFTWARE PUBLISHING
    March 2023 - March 2024 (1 year and 1 month)
    Lyon, France
    → Objective: Redesign the UI and migrate the infrastructure of a SaaS backup solution for Okta/Auth0 tenants.

    → Achievements:

    *Firebase → AWS Migration(Terraform IaC) without service interruption - reducing hosting costs by ~40%
    • Complete redesign of interfaces to React with the creation of aDesign System (+30 components)
    *Reduced hosting costsand improved resilience
    • Mentoring andtraining of 2 developers(code review, pair programming)

    → Technical Stack: React, AWS Lambda, Terraform, Node.js
    React.js Amazon Web Services Node.js Terraform Okta

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Education

  • Computer Engineering Degree, Computer Science, Networks and Telecommunications
    ISIMA - Higher Institute of Computer Science, Modeling and their Applications
    2010
    Diplôme d'ingénieur informatique, Informatique, Réseaux et Télécommunications

Skill set

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