NestJS Jobs in Madrid.
All active NestJS roles based in Madrid.
Pick a job to read the details
Tap any role on the left — its description and apply link will open here.
Senior Full-Stack Engineer — CoreApps Platform (AI-native, Encore)
Share this job
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
Ready to apply?
Apply to Groupon
Senior Fullstack Developer (AIR Automations)
Share this job
At JetBrains, code is our passion. Ever since we started in 2000, we have strived to make the strongest, most effective developer tools on earth. Our tools speed up production by automating routine checks and corrections, freeing developers to grow, discover, and create.
We are looking for a talented Full Stack Engineer to join our team and help build an innovative agentic-driven product. In this role, you’ll work across the entire stack – frontend, backend, and cloud infrastructure – designing, developing, and maintaining high-quality features. You’ll collaborate closely with product managers, designers, fellow engineers and AI-agents to deliver scalable, reliable, and user-friendly solutions.
Our tech stack:
- Primary: TypeScript, Node.JS, Nest.JS, React, Vitest (no legacy tech)
- Secondary: Kotlin/Java (for some backend services)
In this role, you will:
- Design, develop, and maintain end-to-end features across the frontend and backend.
- Collaborate with product and design teams to translate user needs into technical solutions.
- Write clean, efficient, and well-documented code.
- Integrate our product with internal and external APIs and services.
- Contribute to architecture decisions, scalability, and performance improvements.
- Participate in code reviews to ensure quality and best practices.
- Debug, troubleshoot, and resolve issues quickly.
- Optimize applications for speed, usability, and scalability.
- Stay up to date with emerging technologies, tools, and industry trends.
- Continuously improve development processes and practices.
We will be happy to have you on our team if you have:
- 6+ years of proven experience as a Full Stack Engineer or in a similar role.
- Solid engineering and architecture skills and ability to build reliable solutions.
- Focus on customer-oriented delivery and understanding of user needs and requirements.
- Deep understanding of backend & frontend development.
- Proficiency in multiple programming languages (e.g. TypeScript, Kotlin, Java, Python).
- Experience with relational and/or NoSQL databases (e.g. PostgreSQL, MongoDB, and MySQL).
- Understanding of cloud platforms (e.g. AWS, GCP, or Azure) and containerization (Docker or Kubernetes).
- Proficiency with version control systems (e.g. Git).
- Experience with testing frameworks (e.g. Jest, Vitest, and Playwright).
- Familiarity with authentication, authorization, and security best practices.
- Experience with AI agent development
- Strong problem-solving skills and attention to detail.
- Excellent communication and collaboration abilities.
- A bachelor’s degree in computer science or engineering (or equivalent practical experience).
Why join JetBrains?
- Strong base salary. We offer competitive pay that reflects your skills and experience.
- Flexible work location. Enjoy the freedom to work from home or from the office.
- Remote work. Spend up to 30 days per year working remotely from abroad.
- Extra time off. More days to relax, recharge, and do the things you love.
- Medical insurance allowance. Enjoy peace of mind for you and your family.
- Learning and development opportunities. Access to conferences, courses, and language classes.
- Relocation support. We help make your move as smooth and stress-free as possible.
- Language classes. Pick up the local language or sharpen your English skills.
- Fuel your day. Enjoy a hot meal or receive a lunch allowance on workdays.
- Mental health support. To help you feel your best, we provide easy access to professional mental health services.
- Sports benefit. Enjoy an on-site gym or sports club stipend.
- Internal events. Join company-wide celebrations and team gatherings.
*Some benefits may vary depending on location.
#LI-IM1
We are an equal opportunity employer
We know great ideas can come from anyone, anywhere. That’s why we do our best to create an open and inclusive workplace – one that welcomes everyone regardless of their background, identity, religion, age, accessibility needs, or orientation.
We process the data provided in your job application in accordance with the Recruitment Privacy Policy.
Ready to apply?
Apply to JetBrains