Software Engineer Ii

November 6, 2026

Senior

Warsaw, Poland

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Includes on-call duty
Fixed-term contract

Description

A global urban mobility platform is hiring a Software Engineer II for its Payments Engineering team. The role focuses on building and improving a payment platform used by millions, with a stack of Java/Kotlin, Spring Boot, RESTful APIs, Kafka and PostgreSQL. The engineer works in Agile ceremonies, participates in design reviews and takes ownership of reliability, quality and security of deliverables.

Responsibilities

Collaborate proactively with the team, communicate progress and help remove obstacles
Give and graciously receive direct, useful feedback to improve work and processes
Mentor junior engineers and help them grow their technical skills
Design small systems or processes with guidance, considering maintainability and scalability
Participate in design reviews, anticipating how work affects upstream and downstream systems
Take ownership of reliability, quality and efficiency of your deliverables
Plan and execute validation ensuring repeatable and traceable practices and understand common failure points
Design and implement secure processes, mitigate security risks and contribute to documentation
Identify recurring operational issues, propose improvements, monitor performance and take part in on-call or support activities

Requirements

4-5 years of professional software development experience
Technical ownership: accountability for decisions, Agile ceremonies, deploying to production and solving technical issues
Strong grasp of the payments domain and its interactions with other systems
Active work on documentation and knowledge sharing with the team
Team player who takes ownership of initiatives and helps guide them to completion
Growth mindset: learning about business issues and following industry trends
Focus on quality and security, understanding of testing coverage and implementing secure systems
Familiarity with DevOps practices: CI/CD and containerization with Docker and Kubernetes