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.

Skills
JavaScript, Node.js, Java, Spring Boot, Spring, C#, .NET, Rust, Git, Kafka

Experience
5+ yrs

Employment type
Full-time

Work arrangement
Hybrid