Backend Software Engineer

At Too Good To Go, we have an ambitious mission: to inspire and empower everyone to fight food waste together. More than 1/3 of all food produced in the world is wasted. And that has a huge impact on the health of our planet. 10% of greenhouse gas emissions come from food waste and loss. Through our marketplace app, we connect businesses that have unsold, surplus food, with consumers who can buy and enjoy it at ⅓ of retail value. We are a certified B Corporation with a mission to empower everyone to take action against food waste. Alongside our marketplace app, we create educational tools, explore new business solutions, and influence legislation to help reduce food waste. We’re growing fast: Our community of 120 million registered users and 180,000 active partners across 20 countries, have together already saved over 500 million meals from going to waste In 2023, Too Good To Go was recognised on Fortune's acclaimed 'Change the World' list, named as one of Deloitte's 'Best Managed Companies' and won a coveted 'Cultural Impact Award' at the annual Apple App Store Awards. The Role We are building a brand-new engineering hub in London, and we are looking for foundational Senior Backend Software Engineers to help us kick it off. This is a unique opportunity: you will be joining a completely new team, building a new hub from scratch, and working remotely from the rest of our global Tech organisation. You'll be an integral part of this new product team, so you will help define, build, and deliver our product features. You will work towards specific outcomes with the freedom and responsibility to figure out the best way to achieve them together with your team. Your mission will be to help refine, design, implement, deliver, and maintain an international top-class product, ensuring quality, maintainability, and sustainability. As a senior member of this new team, you will serve as a technical anchor—taking full ownership of complex backend challenges, partnering closely with your Lead Engineer to set high quality standards, and helping guide mid-level engineers as the hub grows. The Tech Stack We have created a scalable Spring Boot Application running on Java 25 in Kubernetes, deployed in a multi-region setup in AWS. Developers are able to run a full development environment locally, which gives a great developer experience. Responsibilities * Build and evolve our backend services and infrastructure to stay ahead of our growth curve. * Develop exciting new features for our customers and businesses who partner with us. * Actively participate in your team’s agile development processes with a continuous improvement mindset. * Strive to deliver international top-class products with maximum quality, maintainability and scalability. * Take on additional tasks outside your current boundaries with help from your team to continue to grow and expand your skills. * Take ownership of complex backend features end-to-end—driving efficient technical design, high test coverage, and smooth deployments in close collaboration with your Lead Engineer. The ideal candidate * A wealth of experience in Backend development with the Java ecosystem. * Proven production experience with Java, SpringBoot, MySQL, Message System & GIT. * Has worked with Domain Driven Design, and Clean, or Hexagonal Architecture. * Knowledge of AWS services (SQS, SNS, S3…), ElasticSearch, Redis, Docker, Kubernetes. * Experience with Restful APIs. * Proven ability to break down ambiguous technical tasks into clean, production-ready code independently, while acting as a supportive mentor and reliable sounding board for mid-level engineers. * Experience with building scalable solutions. * Enjoys actively participating in a cross-functional product team. * Takes pride in writing quality code. Our Values * We Win Together * We Raise the Bar * We Keep It Simple * We Build A Legacy * We Care WHAT WE HAVE TO OFFER  * A rare opportunity to work in a social impact company (and certified B Corporation!) where you can see real and tangible impact in your role. * Working alongside an international community of users, partners and 1,200+ colleagues across 20 countries that are on the same important mission. * Personal and professional development opportunities in a fast-paced scale-up environment. * An inclusive company culture where you can bring your authentic self to work * A strong, values-driven team culture where we celebrate successes and socialise with colleagues that care. BENEFITS WORK FLEXIBLY:  * Enjoy hybrid working from our great offices, at home or abroad. * Extra parental leave and days off beyond local legislation and the option to take an extra week of unpaid leave * Health insurance and pension plans. * Additional days off for significant life events CELEBRATE & SOCIALISE * Regular social events like summer and winter parties. * Coffee, snacks and fully-equipped kitchens. * Get to know our community with a monthly free Surprise Bag * Paid volunteer time through our Shareback volunteering programme * Women in the Workplace, P.R.I.D.E., People of Colour and Functionally Diverse Employee Resource Groups  HOW TO APPLY We take recruitment very seriously, so please carefully read everything we have written above. Please also check our website and international media in order to get a good overview of Too Good To Go. Submit your CV and Cover letter in English. Please note that we only accept applications coming through our platform. No CV or Cover Letter will be accepted by email or LinkedIn direct messaging. A Movement for Everyone We want to inspire and empower everyone to fight food waste together. With that mission, it’s only natural that we want to build a diverse and inclusive team of highly capable individuals who are passionate about doing things in a better way. We strongly believe we all excel and are more creative when we’re allowed to be ourselves, and we’re committed to a culture where all of us belong. We are an equal opportunity employer and all employment is decided on the basis of qualifications, merit and business need. If you need reasonable accommodation at any point in the application or interview process, please let us know.

IN SHORT: At On, retail isn’t just a channel—it’s an experience. As we scale our global footprint, we’re laying the foundation for a future-ready Point of Sale (POS) ecosystem. To do that, we need robust backend systems that orchestrate flawless integration between the physical and digital, the store and the cloud. We’re looking for a Lead Backend Software Engineer to drive the integration of our POS platform with mission-critical systems like ERP, OMS, CRM, and loyalty engines. You’ll architect and build resilient services, shape our event-driven data flows, and ensure our store operations stay fast, reliable, and future-proof. You’ll be joining the Retail Experience team—where technology meets the shop floor and every request matters. If you love crafting clean APIs, streamlining integrations, and optimizing real-world system performance, you’ll feel right at home.   YOUR MISSION: * Backend & Integration Engineering: Design, build, and scale backend services that power POS integrations across ERP, eCom, CRM, inventory, and loyalty platforms Develop REST and GraphQL APIs that are performant, secure, and easy to consume Implement real-time and batch data sync, authentication flows (OAuth, SSO), and secure event pipelines * Architecture & Resilience: Contribute to the design of a cloud-native, event-driven architecture for global retail operations Build scalable integration patterns using message queues (Kafka, RabbitMQ) and serverless workflows Support observability through proactive monitoring, alerting, and performance tuning (e.g., NewRelic) * Testing & Quality Automation: Ensure reliability through a robust automated testing stack: contract tests, load tests, and test data pipelines Collaborate with QA and DevOps to streamline CI/CD and improve release confidence Participate in incident response and post-mortem analysis to continuously harden platform stability * Collaboration & Strategy: Partner with frontend, product, and vendor teams to align integration design with platform capabilities Influence technical decisions during vendor evaluations and rollout phases Impact roadmap decisions by sharing technical insights and platform implications Actively contribute to the broader architecture vision for On’s composable commerce technology stack.   YOUR STORY: * 5+ years of backend engineering experience with modern technologies (Node.js, TypeScript, or similar) * Proven track record integrating APIs across commerce, ERP, OMS, or CRM domains * Familiar with headless commerce, microservices, and composable architecture principles * Experience with message brokers (Kafka) and asynchronous data processing * Solid understanding of databases (e.g., PostgreSQL) and infrastructure-as-code tools (Terraform) * Skilled in designing, scaling, and monitoring cloud-native services (AWS, GCP, or Azure) * Familiarity with OAuth2, token-based authentication, and secure service design * Strong debugging and telemetry skills: logs, traces, metrics, and real-time alerting   YOUR TEAM: At On, we don’t just create tools—we craft experiences that move the world. As part of our Retail Experience team, you’ll help build the future of in-store technology. Your code will connect people with performance, power a seamless omnichannel journey, and support a mission that’s bigger than any one screen: to ignite the human spirit through movement. Ready to help us redefine retail? Lace up. Let’s go.   What We Offer At On, we are a team of explorers, dreamers, and innovators. We live and breathe our mission to ignite the human spirit through movement. We offer a dynamic, fast-paced, and collaborative environment where you can make a real impact. You'll be surrounded by passionate and talented colleagues, with plenty of opportunities for professional growth and development.   On is an Equal Opportunity Employer. We are committed to creating a work environment that is fair and inclusive, where all decisions related to recruitment, advancement, and retention are free of discrimination.