Frontend
Web & mobileInterfaces people enjoy using.
Web apps in React and Next.js, mobile apps in React Native and Flutter. Fast, accessible, and easy for the next developer to pick up.
Sergio Pérez, freelance PHP & React developer in Berlin
Backend.Frontend.AI-first.
Freelance Senior Developer & Tech Lead in Berlin.
Today with React
I turn ideas into products that hold up in production:
the API in Symfony or Node, the app in React or React Native, the cloud on AWS. AI agents speed up the work.
Services
What I bring to your team
Backend
Logic & dataAPIs built to last.
REST APIs in Symfony, Laravel and Node, designed with DDD and CQRS. Legacy monoliths split into microservices.
DevOps
InfrastructureInfrastructure that runs itself.
Containers, CI/CD pipelines and cloud on AWS, Google Cloud or DigitalOcean, from first deploy to stable production.
AI & Agents
How I workAI is part of how I build.
Coding agents plan, write and review alongside me, so I move faster without lowering the bar.
Experience
What I've done
- Startups
Led the tech side of startups, owning every technical decision as the team grew.
- Scale
Built and maintained complex web and mobile apps for large online companies.
- Architecture
Refactored legacy platforms into modern, maintainable code and migrated existing systems to microservices on AWS.
Contact
Let's talk
Hiring, building something, or stuck on a hard technical problem?
Write to me.