Kotlin Backend Engineer - Fintech Microservices (Remote)

Sii Sp. z o.o.; Piła; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Private healthcare

Benefits cafeteria platform

Car discounts

Job summary

Sii Sp. z o.o. is seeking a Regular Kotlin Developer (f/m/x) to join the Piła team on a backend-focused fintech platform.

The role emphasizes building and maintaining Kotlin-based microservices to support expense management, payments, and integration with partner systems such as banks and HR solutions. You will work with technologies like Kotlin, AWS, Kubernetes, PostgreSQL, and JUnit 5, delivering scalable backend systems and ensuring reliable performance.

Responsibilities

• Design, build, and maintain microservices using Kotlin
• Collaborate with cross-functional teams across Platform, Services, SMB, and other domains
• Support system performance monitoring and contribute to reliability and scalability improvements
• Participate in code reviews and maintain high code quality standards
• Contribute to continuous improvement of code quality and system architecture
• Troubleshoot and resolve technical issues

Tools

Kotlin

AWS

Kubernetes

Microservices

PostgreSQL

JUnit 5

Job description

Sii Sp. z o.o. is seeking a Regular Kotlin Developer (f/m/x) to join the Piła team on a backend-focused fintech platform.

The role emphasizes building and maintaining Kotlin-based microservices to support expense management, payments, and integration with partner systems such as banks and HR solutions. You will work with technologies like Kotlin, AWS, Kubernetes, PostgreSQL, and JUnit 5, delivering scalable backend systems and ensuring reliable performance.