Company Description
Sunstone Systems is a small US-based software studio. We build custom operational platforms that replace the fragmented stack most businesses run on: the tangle of disconnected apps, brittle Zapier-style automations, and constant copy-pasting between systems that breaks as a company grows.
Our clients get one coherent environment where their data, automation, and workflows live together, on infrastructure they actually own. We build it with Next.js, TypeScript, and PostgreSQL, and we hold a high bar for how that software gets built: type-safe, secure, and consistent every time.

Role Description
We're hiring one junior developer to work directly with the founder. This is not a role where you'll be handed vague tickets and left alone.
You own the front end. That starts before the backend exists: we build interactive mockups of client applications using Claude Code, so clients can click through something real and react to it. You take a rough direction, turn it into working screens, and iterate as feedback comes back. Once the design settles,



you build the production front end on top of it, working closely with me and our senior developer as the database and backend come together underneath.
We also want you interested in what's happening on the other side of the API. You don't need backend depth on day one, but you should want it. Understanding how the data is structured is what separates a front end that works from one that holds up.
If you're early in your career but you read the whole spec, understand the code you ship, and speak up when something looks wrong, this is a strong fit. We're looking for someone who wants to grow into more over time, not someone looking for a short stop.

Responsibilities
Design and build the front end of client applications end to end, from first mockup through production
Build interactive mockups in React and Next.js from written direction, and iterate quickly as feedback comes back
Make sound design decisions on

📌 Junior Developer (Heroica Puebla de Zaragoza)
🏢 Sunstone Systems
📍 Heroica Puebla de Zaragoza