• Join a team that's building the core digital infrastructure for a leading German health-tech platform • Follow a test-driven approach and can refactor code in a structured and low-risk manner • Exercise good judgment in choosing when to apply design patterns-and when to avoid them • Looking for someone to join ASAP! :)

• Architect and design microservices-based payment solutions using Spring Boot • Design and implement secure RESTful APIs and asynchronous communication patterns • Apply domain-driven design (DDD) across payment bounded contexts • Own architecture for core payment flows: authorization, capture, refund, chargeback, and settlement • Design integrations with payment networks (Visa, Mastercard, ACH, SWIFT) and payment gateways • Architect for PCI-DSS compliance, tokenization, and encryption • Define idempotency and exactly-once processing patterns for payment accuracy • Design reconciliation frameworks across internal ledgers and external processors • Conduct threat modeling and security reviews • Mentor development teams and conduct architecture reviews • Define CI/CD standards in Azure DevOps with zero-downtime deployment strategies • Collaborate with Product and Business stakeholders to align technical solutions with business goals

• Own and evolve complex backend systems that power core product flows, from architecture and data modelling to reliability and long-term scalability • Partner closely with engineering leadership, product, and design to shape technical direction and translate ambiguous problems into durable solutions • Lead high-impact initiatives that span multiple services or teams, setting clear technical direction and unblocking others • Raise the bar on system design, correctness, and operational excellence across the backend codebase • Act as a force multiplier for the team: reviewing designs, mentoring engineers, and helping others make strong technical decisions • Contribute to our engineering culture by modelling thoughtful tradeoffs, clear communication, and ownership at scale

• Lead the architectural design and development of scalable Ruby on Rails applications • Optimize database performance (primarily PostgreSQL) • Ensure code quality and reliability through automated testing (RSpec, Minitest) • Mentor team members and foster knowledge sharing • Collaborate with product managers and designers to deliver solutions • Maintain comprehensive technical documentation