Appstronauts

Appstronauts runs from London and Los Gatos, California, with a presence across the US, UK, and Poland, building software teams that plug directly into client projects. Rather than staffing a single role, the company recruits, runs, and manages a dedicated development team on a client's behalf under what it calls a team-as-a-service model, aiming to get senior-level engineers onboarded within days instead of months.

Work covers backend and frontend development for iOS, Android, and web, with a particular emphasis on cross-platform builds and Progressive Web Apps. The stack in use spans Python, .NET, Node.js, React Native, Angular, Svelte, and Ionic and Flutter, alongside native iOS and Android development, giving teams flexibility to match a client's existing architecture or build fresh.

Smartfix30 is the cited example: a SaaS platform Appstronauts built to digitize customer relations for major telecommunications, retail, and utility companies in France, now serving over a million customers across those brands. That project reflects the shape of the company's larger work, pairing backend systems and APIs capable of handling regulated, high-volume industries with the frontend and mobile layers that make them usable day to day. The team-as-a-service structure underpins this delivery model, letting clients scale up engineering capacity without running their own recruitment pipeline for every hire.