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.
What I'm building
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