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Phil Martinez

Senior Software Engineer

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Senior Software Engineer with 8 years building web applications and single-page applications in React and TypeScript. At Qonto, worked on an MCP-based AI agent for automated code migration and delivered features end-to-end for a B2B fintech product used by 600,000+ businesses. Actively building with LLMs and AI tooling in day-to-day engineering work.

skills
Languages
TypeScriptJavaScriptHTML5 · CSS3C#
Frameworks
ReactNext.jsReact NativeNode.jsEmber.jsAngular
Testing & Tooling
VitestPlaywrightQUnitJestStorybookViteWebpackVercelAWSAzure
AI & LLMs
Claude · GPTMCPCursoraiderPrompt eng.
experience
△ Sabbatical · present

Travel & Independent Projects

  • Traveling through Southeast Asia.
  • Writing regularly across tech, yoga, travel, and life.
Aug 2025 — present
Qonto · Paris, France
Jun 2023 — Aug 2025

Senior Web Engineer

  • Led the frontend of Pay Later, Qonto's financing product, owning the end-to-end flow in React and TypeScript for 600,000+ businesses, covering design system integration through to production API delivery with backend and product teams.
  • Built and maintained a shared React component library and design system used across multiple product squads, standardizing design-to-code workflows and improving delivery speed across teams.
  • Worked on an MCP-based AI agent integrated into the editor to automate Ember-to-React migration across a 1M+ line codebase at 20× manual throughput; contributed to prompt engineering and evaluation.
  • Maintained test coverage across a hybrid Ember/React single-page application using QUnit, Vitest and Playwright; enforced quality through CI/CD pipelines and code reviews.
  • Mentored engineers on React, TypeScript and AI-assisted development. Contributed to hiring through technical assessments and interviews.
TotalEnergies · Paris, France
Sep 2020 — Feb 2023

Full-Stack Engineer

  • Built key features of My Fast Charge in React, a platform for EV drivers to locate stations and track usage across 18,000+ charging points.
  • Developed REST APIs in C# ASP.NET to expose charging session and station data for partners and customers.
  • Built a developer portal giving third-party integrators self-service access to API documentation and testing tools.
  • Collaborated closely with product designers to ensure pixel-perfect implementation.
  • Onboarded and mentored a junior engineer through regular code reviews and pairing sessions.
Amadeus · Nice, France
Jan 2020 — Sep 2020

Full-Stack Engineer

  • Built reusable UI components in Angular for a white-label design system deployed to airlines worldwide.
  • Created UI mockups in Figma for partner-facing interfaces and drove them through to implementation end-to-end.
  • Collaborated with product managers to refine requirements and validate feasibility before implementation.
Wekolo · Nice, France
Sep 2018 — Jan 2020

Full-Stack Engineer

  • Built moderation features in React letting community managers review posts across Google and Facebook from a single interface.
  • Developed messaging features for the Wekolo mobile app in React Native.
  • Contributed to C# backend APIs alongside frontend development in a cross-functional team.
Geek School · Nice, France
Jan 2018 — Sep 2018

Coding Instructor

  • Taught programming fundamentals to groups of 10–20 students aged 8–16, from Scratch to JavaScript game development.