Sofia Martinez

Seller

@sofiacodes

Full-Stack Developer · Next.js & Node specialist

📍 Barcelona, Spain🗣 English, Spanish📅 Joined October 2026

About

8 years building production SaaS products. I focus on Next.js App Router, TypeScript, and clean API design. Past clients include early-stage YC startups and a Series B fintech.

Languages: English, Spanish
Location: Barcelona, Spain
Rate: $85/hr
Response time: 1 hour(s)

Skills

Next.jsReactNode.jsPostgreSQLTypeScriptAWS

Gigs

Portfolio

Reviews

Fast, thoughtful, and the deliverable matched the scope exactly. No surprises. Booking again.

9/24/2026

Best freelancer I've worked with on this platform. Took ownership of edge cases I hadn't even thought about.

8/20/2026

Best freelancer I've worked with on this platform. Took ownership of edge cases I hadn't even thought about.

8/15/2026

Sofia Martinez

About

Skills

Gigs

I will build a modern Next.js SaaS website with authentication and Stripe

I will build a custom REST or GraphQL API in Node.js with full test coverage

I will fix bugs and improve performance in your existing Next.js or React app

Portfolio

Reviews

Sofia Martinez

About

Skills

Gigs

I will build a modern Next.js SaaS website with authentication and Stripe

I will build a custom REST or GraphQL API in Node.js with full test coverage

I will fix bugs and improve performance in your existing Next.js or React app

Portfolio

Reviews