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Senior Software Engineer

Poland🌐 Remote💼 Full-time🗓 2026-09-22 → 2026-09-27

Core

Design, build, and scale Java backend services and distributed systems powering global card issuing and payments infrastructure.

Role type

Senior Software Engineer (Backend)

Builds

Distributed systems, microservices, and APIs for real-time global payments

Domain

Fintech / Payments / Financial Services

Deliverable

production ML models | product features

Required skills

Java 15/21, Object-Oriented Programming, Distributed Systems, Microservices, System Design, PostgreSQL, MySQL, AWS, Containerization, CI/CD, Infrastructure-as-Code, TDD

Preferred skills

Event-driven architectures, Domain Driven Design, Fintech domain experience

Technologies

Java, PostgreSQL, MySQL, AWS

Responsibilities

Lead design and development of backend services and APIs; Own features end-to-end from architecture to deployment; Write clean, maintainable, well-tested code; Break down complex technical work; Mentor associate and mid-level engineers; Identify and deliver technical improvements; Participate in incident response and on-call rotations

Seniority

Senior, hands-on IC with mentorship responsibilities

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