Senior) Full-Stack Engineer | Frontend-leaning | Platform Team | Remote Spain

bunch is building the backbone of private markets. We are enabling next-gen fund operations with one integrated system that combines secure data infrastructure, AI-powered workflows and expert fund services. If you value ownership, growth through real responsibility, and working with a thoughtful, ambitious team, this role might be for you.

You’ll join our Platform team as a Full Stack Engineer with a frontend focus
, building the foundational product experiences and services that power bunch. We’re looking for someone who sees product development as a craft - a blend of technical excellence, user-centered thinking, and cross-functional collaboration.

Whether you’re shaping frontend architecture, contributing to backend services, maintaining our Design System, or implementing features end to end, your work will have a direct impact on thousands of users managing billions in assets. We offer you freedom and ownership to build the right solutions and influence the product roadmap.

• Build robust, scalable, and well-tested full-stack product features, with a strong focus on frontend quality, using modern frameworks and our in-house Design System
• Collaborate with PMs, Designers, QAs, and Engineers in the Platform Core team to ship high-quality features quickly
• Contribute to and evolve our frontend architecture, backend services, tooling, and design system
• Ensure a great developer experience and continuously improve performance, reliability, and maintainability across the stack
• Write meaningful unit and E2E tests
• Actively shape product solutions by participating in discovery, feedback rounds, and design critiques

If you're applying as a Senior:

• Take ownership across the stack, with particular depth in the frontend domain, and influence platform-wide decisions
• Drive alignment between design and development, and collaborate on challenging UX cases
• Own and evolve our in-house Design System alongside the design team
• Guide the team in architecture and performance decisions
• Mentor and support other engineers

To thrive in our Platform Core team, you combine a love for building excellent UIs with the ability to work confidently across the stack and a pragmatic, product-first mindset. You're a strong communicator, a team player, and someone who thrives in a growing, fast-paced environment where asking "why" is encouraged.

You...

• Have 5+ years (Senior) of experience building product applications across the stack, with clear frontend depth
• Are fluent in Type Script , comfortable with modern frontend frameworks, and able to contribute to Node.js backend services
• Have experience working with Design Systems
  • for Senior: also experience building or maintaining custom ones
• Are familiar with unit and E2E testing (Vitest, Playwright, or equivalents)
• Understand UI/UX principles and care about building elegant, accessible, and usable interfaces
• Can operate in ambiguity and turn loosely defined ideas into working software
• Have experience in a startup or scaleup environment

Nice to have:

• Previous exposure to fintech or highly regulated domains
• Experience with zod (or any other form validation tools)
• Worked with data visualisations (e.g., tables, charts)

• Frontend
  :
  Svelte + Svelte Kit but moving towards React + Tan Stack, Type Script, MeltUI (headless components) but moving towards Shadcn, Felte + zod
• Testing
  :
  Vitest (unit), Playwright (E2E)
• Design System
  :
  Custom-built (MeltUI)
• Backend
  :
  Node.js, NestJS, MySQL, Sequelize
• Infrastructure: Kubernetes (K8S) on top of AWS

• Competitive salary plus equity
• Customizable benefits package (wellbeing, sport, mobility, food, and more)
• 28 days of vacation, plus 2 company days and local public holidays
• Remote Setup with trip to Berlin (on…