Senior Fullstack Engineer

What should you bring to the table? Solid fundamentals in software design and system architecture. Strong interest in working with AI-enabled products and AI-augmented development workflows. 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 (Pos.

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 65 people and plan to grow in 2026, with a strong focus on engineering, product design, and sales.

What you’ll do? Use modern tooling (including AI-powered tools and internal integrations) to accelerate development and explore solutions (e.g. Claude Code). Work in an AI-augmented development workflow, using tools that help engineers explore documentation, understand the system, and move faster when building features (e.g. Claude Code combined with integrations in Linear, Notion, Slack). Design, build, and maintain full-stack features across our products. Work with React/Remix on the frontend and Node.js on the backend. Participate in the design of systems and architecture decisions to ensure scalability and long-term maintainability. Ensure code quality through testing, reviews, and best practices. Make pragmatic trade-offs to ship quickly while keeping long-term maintainability in mind. Contribute to building and integrating AI-powered features within the product when appropriate.