Senior Payments Engineer - Scalable Backends & AWS

Reply; Katowice; Hybrid; PLN 260,000 - 380,000; Full time

Benefits offered by this job

Motivizer Benefits Platform

Language Courses

Training opportunities

Networking events

Job summary

OBI Smart Technologies, a joint venture between OBI and Reply Group, seeks a Senior Software Engineer to design and scale high-volume payment systems. You will own end-to-end delivery, build payment integrations with Adyen, Stripe, and PayPal, and contribute to a DevOps culture in a cross-functional Scrum team.

You will work in a hybrid setup in Katowice, leveraging Java, Spring Boot, Kafka, AWS, and PostgreSQL to ensure secure, reliable payment services and continuous improvement.

Qualifications

• Completed university degree in Computer Science, Data Science, Mathematics, or a comparable technical field.
• 5+ years of experience in backend development of scalable, distributed systems using Java and Spring Boot.
• Proven hands-on experience in the payment domain, including building or integrating payment gateways and payment orchestration systems.
• Strong understanding of payment processes such as authorization, capture, settlement and refunds.
• Experience integrating payment providers such as Adyen, Stripe, PayPal or similar platforms.
• Practical experience with AWS, Kafka, Docker, Terraform, and SQL-based databases (e.g. PostgreSQL).
• Fluent communication skills in English and Polish, with openness to hybrid work in Katowice.

Responsibilities

• Design and implement highly available and scalable backend components for payment services, including payment flows such as authorization, capture, and refunds.
• Build and evolve payment integrations with external providers and internal payment orchestration layers.
• Take end-to-end ownership of services, including architecture, development, QA, security, and operations in a DevOps setup.
• Contribute to event-driven, distributed systems using Java, Spring Boot, Kafka, and AWS.
• Collaborate with Product Owners and stakeholders to shape payment-related features and improvements.
• Ensure reliability, performance, and security of payment systems through monitoring and continuous improvement.
• Work in a cross-functional Scrum team, contributing through code reviews, pair programming, and knowledge sharing.
• Participate in Motivizer Benefits Platform initiatives to manage benefits and participate in learning and development programs.
• Engage in internal community activities, networking events, coding challenges, and company parties.

Skills

Java

Spring Boot

Backend development

AWS

Kafka

Docker

Terraform

PostgreSQL

English

Polish

Hybrid work

Education

BS/MS in Computer Science or related field

Tools

Adyen

Stripe

PayPal

Job description

OBI Smart Technologies, a joint venture between OBI and Reply Group, seeks a Senior Software Engineer to design and scale high-volume payment systems. You will own end-to-end delivery, build payment integrations with Adyen, Stripe, and PayPal, and contribute to a DevOps culture in a cross-functional Scrum team.

You will work in a hybrid setup in Katowice, leveraging Java, Spring Boot, Kafka, AWS, and PostgreSQL to ensure secure, reliable payment services and continuous improvement.