Fullstack Engineer (f/m/d)

As a Fullstack Engineer (f/m/d) in our Merchant Experience team, you’ll help build and evolve the digital products our partners and merchants interact with every day. You’ll work across the entire merchant journey — from the Partner Area, where designers manage their designs and shops, to the sign-up and publishing experience that turns an idea into a live SpreadShop, and the Merchant Area, where SpreadConnect merchants manage integrations with Shopify, TikTok, and other platforms. As a Fullstack Engineer (f/m/d), you’ll take ownership beyond individual UI components or API endpoints. You’ll design and implement features end-to-end, collaborate closely with product and design, and ensure that the experiences you build are reliable, performant, and easy to evolve. Your work directly impacts how merchants use and grow with our platform. You’ll build products that make their day-to-day work easier and help drive our business forward.

What You´ll Do

• Build and evolve merchant-facing product surfaces — sign-up and shop creation flows, shop management, design and product administration, sales statistics
• Build the new publishing journey for shops — from sign-up to a live SpreadShop — and take drop-off out of every step
• Own small to medium features end to end: design the UI, build theKotlin/Spring endpoints behind it, model the data, and ship both together
• Extend our backend services where your features need it — new REST endpointsin the shop and partner services, data model changes with a proper migration, and integrations with external platforms such as Shopify or TikTok on the SpreadConnect side
• Design and consume our REST and GraphQL APIs, and push back when a responseshape makes the frontend's life harder than it needs to be
• Contribute to our cross-team frontend architecture work — shared components,hooks and API clients, and how we render, test and ship our apps
• Keep merchant tooling fast — data-heavy tables, sales statistics and editorsare where perceived performance is won or lost
• Take on larger topics — an epic, a new integration, a new merchant surface —and break them down into something the team can execute: slices, dependencies, open questions, and a first piece worth shipping
• Work in an agile cross-functional team with a product owner, designers and backend engineers, and connect what you build to merchant activation and conversion

What You´ll Bring

• Solid proficiency in TypeScript and React — component design, hooks, statemanagement, and the performance patterns that keep a growing app fast
• Around three or more years of professional experience building web products, with a track record of features you carried from first ticket to production
• Real CSS craft and experience working inside a design system or shared component library, not just against one
• Experience consuming REST or GraphQL APIs and working with structured, data-heavy responses — product catalogs, variants and attributes bring more complexity than they first appear to
• Working experience in a JVM backend — Kotlin or Java with Spring — and the ability to build a REST endpoint, model the data behind it and write the migration, not just read the code
• A solid grasp of relational databases and SQL, and of what happens to a query when the table stops being small
• Self-direction: you take an under-specified problem, find out what is actually needed, break it into deliverable pieces and drive them to donewithout waiting to be handed tickets
• Testing as a habit rather than an afterthought, and a working relationship with code review
• A keen eye for UI detail — you care about how something feels, not only whether it works
• A product mindset: you ask who benefits from a change before you ask how to build it
• Good communication skills in English

Why Should You Join Us

• Autonomy and Impact: We believe in giving people real ownership. You'll have the freedom to make decisions, take action, and see the direct impact of your work on the business.
• Development and Growth: We believe that the greatest professional and personal growth happens when you're challenged. If you're looking to build your career, you'll find plenty of opportunities to do so.
• We Win as a Team: Work alongside ambitious, motivated colleagues who challenge and support each other to achieve exceptional results. Through honest feedback, high standards, and shared ambition, we bring out the best in one another.
• Learn from Proven Entrepreneurs: Work closely with experienced founders and business leaders, gaining first-hand insights into growing a successful international company.
• Transparency and Involvement: Stay connected to our vision through regular General Assemblies, learn about our processes in our production sites in the Czech Republic and join workshops and cross function initiatives to lead positive change.
• The Extras That Matter: Enjoy 30 days of paid vacation, attractive employee discounts on our products and partner brands, modern office spaces designed for collaboration, and regular company events where we celebrate our successes together.

Equal Opportunity Employer

We value diversity at Spread Group. We are proud of and continue to encourage the increasing diversity of our company culture and community. Your skills, talents, and experience are our focus no matter your age, ethnicity, religion, national origin, gender, sexual orientation, marital or disability status.

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