Senior Backend Engineer

We're working with a leading circular-economy company that operates Germany's largest reusable-packaging network, with a deposit-return system integrated across over 17,000 locations. They are building a cloud-native, event-driven TypeScript platform to power operational logistics for partners, point-of-sale, returns, billing, and fulfillment at a national scale, with plans for international expansion. This is an opportunity to join a pioneering company that is making a significant sustainable impact.The Role Design, build, and own core platform services including partner management, point-of-sale, billing, returns, fulfillment, and contract managementBuild event-driven, async-heavy integrations between services and external systems, including outbox patterns, queues, retries, and dead-letter handling treatmentsDrive international expansion initiatives for the platformCollaborate with technical leads on architectural decisions, data modeling, and incremental extraction of capabilities into the new platformSet high engineering standards for testing, observability, and operational readiness from the outsetWhat You'll Need7-10 years of backend engineering experience with deep production expertise in Node.js, TypeScript, and NestJSExperience with distributed, async/queue-heavy system design and implementationSolid relational data modeling and SQL skills (MySQL, PostgreSQL preferred)Ability to take end-to-end ownership of problems: design, build, test, ship, and operateExperience working with legacy PHP codebasesComfortable integrating AI coding agents into your workflow, from prompting to reviewing and integrating agent outputWhat's On OfferThe opportunity to make a significant impact at a company combining economic growth with sustainable practicesFlexible working models, including flexible hours and remote work options (2 days/week in office)Significant room for professional development and ownership of your workA dynamic, growth-oriented environment in a scale-up phaseApply via Haystack today!