Backend Product Engineer, Loyalty & Virality (all genders)

HelloFresh's HelloTech organisation in Warsaw is their global technology backbone with over 1000 people creating digital products that support their end-to-end food experience, including meal kits, ready-to-eat meals, pet food, and premium meat & seafood. HelloTech builds shared platforms, data, and operational excellence for HelloFresh's brands through autonomous, cross-functional teams, developing scalable data-driven products working with modern tech and international teams.

• Hands-on experience using AI tooling daily beyond casual experimentation with practical knowledge on shaping AI output context.
• Minimum 3 years of experience building and deploying scalable backend services.
• Proficiency in Go and/or PHP preferred; experience with JVM languages such as Java or Kotlin and willingness to learn Golang welcomed.
• Strong background in microservices and distributed systems.
• Proven ability to build event-driven architectures using messaging technologies like RabbitMQ, Kafka, or AWS SQS/SNS.
• Deep understanding of relational databases (e.g., PostgreSQL, MySQL); familiarity with non-relational databases and/or GraphQL is a plus.
• Strong understanding of system integration and service resilience.
• Practical knowledge of containerization with Docker, orchestration tools like Kubernetes, and CI/CD processes.
• Solid foundation in testing methodologies including unit and end-to-end testing.
• Strong collaboration skills with product designers.
• Ability to prioritize aggressively and make trade-offs between long-term builds and quick experiments.
• Understanding of loyalty experience across the user funnel.
• Full ownership mindset with a bias to ship and finish work.
• Product sense supported by data and user evidence.
• Strong fluency in Go with hands-on experience building distributed systems featuring event-driven and asynchronous flows, clear service contracts, and design for partial failure.
• Experience operating production systems, including observability and data layers.

• Design and ship backend features across the Loyalty and Rewards domain to encourage point earning, tracking, and spending.
• Develop and deploy high-performance, scalable backend services and APIs.
• Collaborate closely with frontend and mobile engineering teams for end-to-end delivery.
• Maintain a fast development cadence turning hypotheses into live experiments within days.
• Contribute to and help prioritize the hypothesis backlog based on customer data.
• Take technical lead on complex backend-heavy product problems, designing and operating reliable services at scale.
• Operate and continuously improve the systems you build, including instrumentation and monitoring.
• Work beyond backend specialization when necessary to solve problems.
• Partner with product designers to deliver impactful user experiences.