Full Stack Engineer

We’re Kabilio, a company backed by two leading venture capital firms, founded by experienced entrepreneurs, Alex Valls and Jose Ojeda, with a strong track record in building and scaling successful tech companies.

What We’re Building

Our goal is to become the go-to Financial Operating System for accounting firms and SMEs in Southern Europe, unifying accounting, tax, payments, planning, and banking into a single platform. We are currently a tight-knit team of 70 people and plan to grow in 2026, with a strong focus on engineering, product design, and sales.

This is our tech stack

Languages

• Typescript | Python | .Net (a little bit)

Front

• React | Remix

Back

• Node.js | Prisma ORM | Effect

Infra & DB

• PostgreSQL | Docker | AWS and GCP

Why this role matters?

Today, Kabilio already runs three core products in production — Invoices Processing, Bank Transactions, and Invoicing — used daily by real customers. At the same time, we’re building our Accounting platform, the product that defines our long-term vision and the reason Kabilio was founded. AI sits at the core of everything we build, from automating and categorizing financial data to enabling intelligent workflows and decision-making across the entire financial lifecycle. We rely on modern architectures and proven technologies to turn this vision into a scalable, production-ready platform.

As a Full Stack Engineer at Kabilio, you will build and own product features end-to-end, working closely with with Ivan (CTO), Jorge, Karel, Arnau and Lucas, Tech Leads, as well as with a cross-functional team of devs and Product Managers.

You’ll contribute to both frontend and backend systems, helping us ship high-quality software that is used daily by real customers.

This is a hands-on role focused on delivery, quality, and collaboration, with a high degree of ownership and the opportunity to influence technical decisions without being a people manager.

What you’ll do?

• Design, build, and maintain full-stack features across our products.
• Work with React/Remix on the frontend and Node.js on the backend.
• Collaborate closely with Product and Design to turn requirements into solutions.
• Ensure code quality through testing, reviews, and best practices.
• Make pragmatic trade-offs to ship quickly + long-term maintainability.
• Contribute to technical discussions and propose improvements to the codebase.

What we offer?

• Salary range: Competitive salary (TBD in the first call).
• Flexible benefits via Cobee.
• Hybrid setup: 3 days/week in our Barcelona office. The home office days give you time to focus and the flexibility to plan your day around your productivity peaks.
• Opportunity: Enter a massive market ready for disruption. We have a clear strategy to make our mark in Spain, leveraging what we have seen in other markets.
• Collaborative and Growth Culture: We prioritize open communication and respectful discussions. Your ideas will have a real impact, and you will have the chance to shape and grow with the business

What should you bring to the table?

• Ability to work autonomously while collaborating with a team. Technical ownership.
• Strong experience building production web applications, ideally with React and Node.js.
• Good understanding of relational databases (PostgreSQL or similar).
• Experience working across the full product lifecycle (e.g. SaaS).
• Care for clean code, maintainability, and best practices.
• Professional level Spanish, and English (B1 should be enough).
• Above all, you’re a reliable and trustworthy person