About the roleWe’re looking for a passionate and experienced Senior Fullstack Engineer to join our Developer Experience & Enablement Platform (DEEP) team. Within this team, we provide a trusted engineering foundation through reliable platform infrastructure, opinionated libraries and tooling, and clear architectural standards. In this role, you’ll design and build robust foundations for internal applications used daily by more than 300,000 people across the company. This is a high-impact position where you’ll work holistically across the stack, dive into complex technical challenges, and help shape the future of Tesco’s technical landscape. What is in it for youHybrid workWe know life looks a little different for each of us. That’s why at Tesco, we always welcome chats about different flexible working options. Some people are at the start of their careers, some want the freedom to do the things they love. Others are going through life-changing moments like becoming a carer, adapting to parenthood, or something else. So, talk to us throughout your application about how we can support. This role requires you to be based in or near Kraków, as you will spend 60% (3 days) of your week collaborating with colleagues at our office locations or local sites and the rest remotely.Benefits If you choose to join our business, we will provide you with (for all):   Permanent contract from the go – as a sign of our trust in your abilities  MacBook as your tool for work  Learning opportunities - certified technical training and learning platforms like Udemy, Pluralsight and O’reily  Referral Bonus  Sports activities with a personal trainer in the office   Benefits for colleagues on employment of contract only:   Additional 4 days of paid leave to support your well-being and family life  Up to 20% yearly salary bonus – based on both individual and business performance  Private healthcare (LuxMed)  Cafeteria & Multisport  Supporting those, who are not yet eligible for full holiday entitlement, by expanding their pool from 20 to 25 days  Relocation Help  IP Tax Deductible Costs   If that sounds exciting, then we'd love to hear from you! Tesco is committed to celebrating diversity and everyone is welcome at Tesco. As a Disability Confident Employer, we’re committed to providing a fully inclusive and accessible recruitment process, allowing candidates the opportunity to thrive and inform us of any reasonable adjustments they may require.You will be responsible forWhat you'll work on :Architect and build foundational components of critical internal applications; write RFCs/ADRs and drive technical consensus. Play a key role in technical evolution of an existing platform. Develop and maintain shared libraries, infrastructure, and tooling that support engineering teams. Collaborate with product, architecture, programme, and engineering stakeholders to deliver high-quality solutions. Promote engineering excellence through advanced engineering practices, automation, testing, and observability. Key technologies:Languages & Frameworks: TypeScript, Node.js, React, Micro Frontends, Microservices Cloud & Infrastructure: Azure, Kubernetes, Terraform CI/CD & GitOps: GitHub Actions, ArgoCD Testing: Vitest, Playwright Monitoring & Logging: New Relic, Splunk, xMatters You will need:7+ years of experience building and shipping production-grade applications. Strong expertise in system design, frontend and backend development. Deep understanding of cloud platforms (Azure, AWS, or GCP), infrastructure-as-code and networking fundamentals (DNS, TLS, ingress). Experience with Agile methodologies and cross-functional collaboration. Proven ability to own projects end-to-end, from concept to production. Excellent communication skills in English, with the ability to explain complex topics clearly. Experience mentoring engineers and fostering technical growth within teams. A holistic mindset — you care about reliability, performance, developer experience, and long-term impact. A proactive, self-driven attitude with a focus on delivering meaningful value. About usTesco is a leading multinational retailer, with more than 330 000 colleagues.  Our software is used by millions of people across several countries every day. Whether it’s the tills and websites our customers use, or the systems our colleagues and partners use, you’ll play your part in keeping it running like a well-oiled machine. And when a business problem pops up? You and the creative minds in our team will be challenged to solve it.  As Tech Hub we cooperate within the group of Tesco Technology Hubs located in the UK, Poland, Hungary, Czech Republic and India.  What our colleagues like the most at Tesco:   We develop our own products  We make an impact; large scale of operation  Accountability and respect are given to us  We cooperate and support each other  There are great colleagues who are divided into small teams here  We can develop and learn new things