Frontend Engineer (m/f/d) at Mercanis – Spain | Jobyssey

At Mercanis, we are building the AI Procurement Platform that powers the procurement of tomorrow, digital, transparent, and intelligent.

We are looking for a Frontend Engineer who is excited to build beautiful, intuitive, and performant user experiences for our B2B platform. You will work in a cross-functional agile team alongside experienced engineers, product managers, and designers. Our frontend stack is built with SvelteKit, TypeScript, Tailwind, Vite, and modern testing tools, and you will have the opportunity to contribute to a domain-driven, event-driven architecture in a modern monorepo setup.

This role is ideal for someone who brings solid professional frontend experience and wants to grow in a collaborative engineering culture that values learning, craftsmanship, and product thinking.

You will implement key product features, working closely with Product and Design to bring user-centric solutions to life.
You will improve and maintain the frontend architecture, contributing to a codebase that is modular, scalable, and enjoyable to work in.
You will collaborate with senior engineers, participating in code reviews, pairing, and technical discussions to continuously raise the bar for quality.
You will mentor junior engineers, sharing knowledge, guiding best practices, and helping them grow their frontend skills.
You will support the hiring process when needed, running frontend interviews and contributing to technical assessments.
You will participate in the entire development lifecycle, from early exploration to production deployment and monitoring.
You will stay curious and explore new tools, contributing ideas that improve performance, accessibility, developer experience, and overall product quality.

3+ years of professional experience as a frontend or full-stack engineer
Solid understanding of modern web development principles, including component-based design, reactivity, and performance optimization
Strong experience with TypeScript, modern frontend frameworks (Svelte is a plus), and shared state management approaches
Good working knowledge of HTML, CSS, and Tailwind, with an eye for clean and consistent UI implementation
Experience with testing tools such as Jest or similar frameworks
A collaborative and pragmatic mindset, combined with strong communication skills
A desire to grow, learn, and contribute to a high-performing engineering culture
Fluency in English, spoken and written

Nice to haves:

Experience working with SvelteKit or interest in adopting it quickly
Understanding of design systems, component libraries, or UI architecture patterns
Familiarity with accessibility best practices and performance profiling
Experience with CI/CD, Vite, or monorepo tooling

Tech you will work with:

Frontend: SvelteKit, TypeScript, Tailwind, Vite
Testing: Jest, Playwright, or similar tools
Collaboration: GitHub, Figma, Jira
Architecture: Domain-driven design, event-driven backend, modern monorepo environment

You will work with a modern frontend stack and have opportunities to learn cutting-edge technologies such as SvelteKit and advanced monorepo practices
You will join a supportive and collaborative engineering team that values continuous learning and healthy feedback
You will have multiple paths for growth, including senior technical roles or leadership tracks
You will experience a flexible remote setup in Spain, with the option to join our Berlin office for collaboration
You will be part of a culture grounded in transparency, curiosity, autonomy, and meaningful impact

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