About us

Join us and help us transform the investment sector with Slate WT. We are looking for someone to join us as Product Engineer. Our goal is to make investing easier, and this role will contribute to improving the overall operations and experience of our clients.

The role

Reporting to Engineering Lead / CTO, we're looking for an engineer who thinks like a product person and codes like a senior developer.

You won't be handed specs to implement. You'll work alongside the Product Manager as a technical partner — contributing to conversations about what gets built and why, surfacing complexity early, and challenging assumptions before they become costly. The PM owns the roadmap and the client relationships; you own the technical translation: the API contracts, the architectural decisions, and what actually ships. Then you build it, maintain it in production, and feed what you learn back into the next cycle.

The technical depth is real: our stack is Kotlin + Spring Boot on a hexagonal architecture, AWS SQS for async event flows,



multi-tenant production systems across regulated financial markets. You need to be comfortable there. But what separates this role is the ability to understand the *why* behind a feature and carry that context through to the implementation.

AI fluency is expected as table stakes — you should already be using AI tools daily to move faster and think harder. The goal isn't AI for its own sake; it's being the kind of engineer who delivers more than the team expects, reliably.

What you'll do
- Work closely with the Product Manager on feature definition: bring technical perspective to scoping discussions, flag complexity trade-offs early, and make sure what lands on the roadmap is actually the right thing to build.
- Design and own the API contracts within your domain — APIs that external developers integrate into their financial products, where clarity, stability, and usability matter as much as correctness.
- Build and maintain backend

📌 Product Engineer (España)
🏢 Slate Wealth Technology
📍 España