Martin S.

I build complete apps — design, backend, and mobile + web — as a single developer. What typically requires a team, I deliver in months, with quality that lasts. My approach: you get a fully navigable app to review and give feedback on before any backend work begins. This gives us a natural milestone to align on the product together before moving into the technical integration. I also include a debug menu in test builds — shortcuts like auto sign-in, form fills, and quick purchases — so you can test everything fast without tedious manual steps. I handle everything from idea to app store, but I also collaborate well with designers, backend developers, and product teams when the project calls for it. I've worked solo and in teams — including 1.5 years on Funda's new mobile app. Tech: Flutter (mobile + web), Supabase, Firebase, Cloud Run, Stripe. I'm a great fit if you: • Have a product idea and need someone to build the whole thing • Want mobile and web from a single codebase, built by one person • Care about quality that doesn't fall apart as you grow I'm not the right fit if you: • Need the cheapest option available • Want someone who just executes without questions or input What I've built: • Funda — Netherlands' #1 property platform. Key developer on the new mobile app, 1.5 years, working with designers, QA, product owners, and multiple dev teams. • Nara Hjartat — Heart health app. Solo full-stack delivery, idea to app store. • Insatskartan — Community resource platform, mobile + web + admin portal. Solo full-stack delivery. • Almighty Volume Keys — 500k+ downloads (Android, now sold). • ExpertGO — Professional networking app. Feature development and architecture. • Localore Sverige — Geography learning app. Solo delivery. What clients and colleagues say: "Everything is always possible for him, but his knowledge allows him to recommend changes to save time and costs." — Esti Murik, Product Designer, Funda "He is a proactive communicator, works independently and asks spot-on questions." — Toon Van Craenendonck, Product Leader, Funda "Working with Martin has been an absolute pleasure. He delivers exactly what he promises." — Upwork client, Insatskartan "Great architectural precision. Solutions well thought through, execution and delivery on time." — Alfred Tang, Engineering Manager