Senior Backend Engineer - FinTech Engineering (M/F/N)

We're looking for a Senior Backend Engineer to join our FinTech Platform team and help us build the next generation of payment and financial services solutions at InPost. In this role, you'll take end-to-end ownership of payment domain features, designing and building distributed backend services that power critical financial operations. You'll work in a modern engineering environment where accountability extends from product requirements through architecture, development, production monitoring, and continuous improvement. What will you work on? • designing and building event-driven backend services supporting payment authorisation, ledger management, settlement, and other financial domain processes,  • developing scalable and resilient APIs with a strong focus on reliability, security, performance, and maintainability,  • participating in the full software development lifecycle, from requirements and technical design through testing, release, and production support, • designing and maintaining structured domain events and event-driven integrations across distributed systems,  • collaborating with engineering managers and product teams to shape roadmaps, refine requirements, and influence technical direction,  • investigating incidents, performing root cause analysis, and driving continuous platform improvements,  • mentoring engineers, conducting code reviews, and promoting engineering best practices across the team.  This cooperation may be a strong match if you: • have at least 5 years of experience in backend software engineering using Java, C#/.NET, Rust, or Node.js, • have hands-on experience designing and operating distributed systems and event-driven architectures, • have delivered and maintained production services, APIs, CI/CD pipelines, and observability solutions, • understand distributed systems concepts such as consistency models, saga patterns, idempotency, and outbox patterns, • have practical experience with relational databases, preferably PostgreSQL, • are comfortable with automated testing at multiple levels, including unit, integration, and contract tests, • actively use AI-powered engineering tools such as GitHub Copilot, ChatGPT, Claude, or similar solutions in everyday development work, based on engineering best practices promoted within the team, • communicate in English at B2 level or higher. Additional advantages: • experience within payments, fintech, or regulated environments, • experience with Java and Spring Boot in production environments, • knowledge of Kafka or other streaming technologies, • familiarity with PCI DSS, PSD2, KYC/KYB, or risk decisioning systems, • experience with Docker, Kubernetes, cloud platforms, and observability tooling such as Prometheus, Grafana, or OpenTelemetry. What we offer: • the opportunity to build products that sit at the heart of InPost's growing financial services ecosystem, • ownership of business-critical solutions operating at scale, • a modern engineering environment focused on autonomy, accountability, and continuous learning, • collaboration with highly experienced product, engineering, and business teams, • access to cutting-edge technologies, event-driven architectures, and cloud-native solutions, • opportunities to shape technical standards, mentor others, and influence platform evolution, • full-time contract of employment.