Senior Full-Stack Engineer — CoreApps Platform (AI-native, Encore)
Groupon · Madrid; Prague
About this role
Groupon is a marketplace where customers discover new experiences and services everyday and local businesses thrive. To date we have worked with over a million merchant partners worldwide, connecting over 16 million customers with deals across various categories. In a world often dominated by e-commerce giants, we stand out as one of the few platforms uniquely committed to helping local businesses succeed on a performance basis.
Groupon is on a radical journey to transform our business with relentless pursuit of results. Even with thousands of employees spread across multiple continents, we still maintain a culture that inspires innovation, rewards risk-taking and celebrates success. The impact here can be immediate due to our scale and the speed of our transformation. We're a "best of both worlds" kind of company. We're big enough to have the resources and scale, but small enough that a single person has a surprising amount of autonomy and can make a meaningful impact.
About the Role
Senior Full-Stack Engineer — CoreApps Platform (AI-native, Encore)
A builder role on the team that powers Groupon's global commerce engine.
CoreApps Platform is the foundational engineering group powering Groupon's global commerce engine — every customer interaction and every transaction, worldwide. This is a builder role: you take features from problem statement to production across backend, frontend, CI/CD, and test automation, using Claude Code as your daily leverage tool. You own the whole slice. You unblock yourself. You ship.
What You'll Do
- Drive features end-to-end. Backend services, frontend surfaces, CI/CD pipelines, test coverage, deploy, monitor — the whole vertical slice. No handoffs, no "that's someone else's team."
- Ship on legacy and cutting-edge together. Modernize Java / Ruby systems into TypeScript / Node.js on Encore, while keeping services at 100K+ RPM running cleanly.
- Operate Claude Code natively. Daily agentic workflow with MCPs, skills, hooks, evaluation patterns — AI is not a productivity add-on, it's how you collapse FE + BE + DevOps + QA into a single-engineer scope.
- Cut through red tape. Find the path. Kill process that doesn't protect anything. Respect process that does. Escalate when you can't, ship when you can.
- Lift your peers. Share patterns, unblock teammates, leave the codebase cleaner than you found it.
Must Have
- 5+ years shipping production software, with deep production TypeScript / Node.js as your primary backend stack (NestJS / Fastify / Encore or similar, named and used).
- Full-stack range. You've owned features across backend and frontend, and you're comfortable in CI/CD pipelines, test automation, and production debugging. Specialist-only profiles (backend-only, frontend-only) will not fit this role.
- Claude Code native. Daily use with a demonstrable personal setup — MCPs, skills / agents, hooks, or equivalent automation. You can screen-share it. Autocomplete-only and Cursor-only do not qualify.
- Builder bias. Evidence of projects you drove beginning to end — scoped the problem, designed the approach, shipped it, operated it. No "I contributed to…" answers — we want what you built.
- Distributed systems fundamentals — API design, SLOs, structured observability, on-call ownership.
- High-bandwidth communication — written and verbal, across technical and non-technical audiences.
Nice to Have
- Java or Ruby reading fluency (for navigating the source systems being migrated).
- E-commerce / marketplace scale experience.
- Encore, Temporal, or similar workflow frameworks.
- Frontend frameworks used in anger (React, Next.js).
What Success Looks Like
First 30 days: operating in the team's AI workflow on day one — Claude Code setup running, first PR merged, owning a service.
First 90 days: shipped at least one end-to-end feature across the full stack, reduced a real bottleneck, demonstrably faster velocity than traditional backend-IC pace.
First 180 days: the team points to work only you could have driven at that pace — migration cutovers, FE + BE features shipped as single units, tooling peers now depend on.
We Are Interested In
Builders. Engineers who take scope from "this is a problem" to "this is in production" without waiting for permission. Fluent in Claude Code as the force multiplier that makes one engineer effective across backend, frontend, DevOps, and QA. Deep in TypeScript, comfortable anywhere in the stack, energized by cutting through noise and shipping. If you wait to be told what to do, this role will frustrate you.
#LI-KH1 #LI-Hybrid
Groupon is an AI-First Company
We’re committed to building smarter, faster, and more innovative ways of working—and AI plays a key role in how we get there. We encourage candidates to leverage AI tools during the hiring process where it adds value, and we’re always keen to hear how technology improves the way you work. If you’re passionate about AI or curious to explore how it can elevate your role—you’ll be right at home here.
Groupon’s purpose is to build strong communities through thriving small businesses. To learn more about the world’s largest local e-commerce marketplace, click here. You can also find out more about us in the latest Groupon news as well as learning about our DEI approach. If all of this sounds like something that’s a great fit for you, then click apply and join us on a mission to become the ultimate destination for local experiences and services.
Beware of Recruitment Fraud: Groupon follows a merit-based recruitment process without charging job seekers any fees. We've noticed an increase in recruitment fraud, including fake job postings and fraudulent interviews and job offers aimed at stealing personal information or money. Be cautious of individuals falsely representing Groupon's Talent Acquisition team with fake job offers. If you encounter any suspicious job offers or interview calls demanding money, recognize these as scams. Groupon is not responsible for losses from such dealings. For legitimate job openings (and a sneak peek into life at Groupon), always check our official career website at Groupon Careers
About Groupon
Groupon is a marketplace where customers discover new experiences and services everyday and local businesses thrive. Our mission is to revolutionise the underserved local experiences and services market and to reach our goals we are always on the look out for top talent. We celebrate hard work, ensuring those who drive impactful change reap the rewards they deserve. Here, you can make swift, impactful decisions without endless meetings. Advancement is based on performance, not politics and we thrive on innovation and cutting-edge technology. If your current role lacks growth, we can offer limitless potential based on your ability to deliver. So, whether you're a big thinker who redefines sales strategies and close deals swiftly, a tech disruptor excited by AI and cutting-edge tech, or Finance or HR expert that thrives in a performance-driven environment we want to talk to you. Learn more about life at Groupon and check out our open roles below. Come break barriers and accelerate your career with Groupon!
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