Buildingdigitalproductsthatmatter
With 6+ years of experience as a software engineer, I specialize in building cutting-edge web and mobile applications. I combine technical excellence with a product mindset to bring your ideas to life — from initial concept to production-ready solutions.
What I do best
Mobile Development
Native-feeling apps with React Native & Expo for iOS and Android platforms.
Web Development
Modern, performant web applications with React, Next.js, and TypeScript.
AI & Agents
RAG architectures, vector databases, and LLM integration for intelligent application features.
Backend Systems
Scalable APIs and microservices with Node.js, NestJS, and GraphQL.
Cloud & DevOps
Cloud infrastructure and CI/CD pipelines on AWS and modern platforms.
Architecture
Clean, scalable system design with hexagonal architecture patterns.
My journey
Freelance Software Engineer
Vallourec · Oil & Gas
8 months · Paris
Design and build a full-featured web and mobile application to manage drilling pipes for industrial partners and clients, with AI-powered semantic search on technical documents.
Vallourec
World leader in premium tubular solutions for the energy industry, serving oil & gas and industrial markets globally.
Freelance Software Engineer
Vallourec · Oil & Gas
8 months · Paris
Design and build a full-featured web and mobile application to manage drilling pipes for industrial partners and clients, with AI-powered semantic search on technical documents.
Meuf
Innovative social platform empowering women through authentic connections and community building.
Freelance Software Engineer
Meuf · Social Media
6 months · Paris
Built a social media platform for women from scratch with AI-powered safety features, from MVP to stable release.
Freelance Software Engineer
Meuf · Social Media
6 months · Paris
Built a social media platform for women from scratch with AI-powered safety features, from MVP to stable release.
Freelance Software Engineer
Avicenne · Web3
6 months · Paris
Worked on various Web3 agency projects with focus on code quality and refactoring.
Avicenne
Digital agency specializing in Web3 and blockchain solutions for forward-thinking businesses.
Freelance Software Engineer
Avicenne · Web3
6 months · Paris
Worked on various Web3 agency projects with focus on code quality and refactoring.
Blockpulse
Fintech platform streamlining equity management and shareholder governance through blockchain technology.
Freelance Software Engineer
Blockpulse · Fintech / Blockchain
6 months · Paris
Migrated existing Adonis.js API to NestJS, cleaned codebase, and released on schedule.
Freelance Software Engineer
Blockpulse · Fintech / Blockchain
6 months · Paris
Migrated existing Adonis.js API to NestJS, cleaned codebase, and released on schedule.
Software Engineer
Libeo · Banking / Finance
1 year · Paris
Streamlined invoice payment and reconciliation processes for businesses.
Libeo
B2B payment solution simplifying invoice management and cash flow for European businesses.
Software Engineer
Libeo · Banking / Finance
1 year · Paris
Streamlined invoice payment and reconciliation processes for businesses.
Netdevices
Full-service digital agency delivering custom web and mobile solutions across multiple industries.
Full-stack Developer
Netdevices · Consulting Agency
3 years · Paris
Developed web and mobile applications for diverse clients across multiple industries.
Full-stack Developer
Netdevices · Consulting Agency
3 years · Paris
Developed web and mobile applications for diverse clients across multiple industries.
Ready to bring your
idea to life?
I'm currently available for freelance projects. Let's discuss how I can help turn your vision into reality.
or email me at erwan.massou@gmail.com