Kotlin Backend Engineer: Fintech Microservices

Sii Poland; Szczecin; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

MySii app

Medical care

Profit sharing

Internal trainings

Open management

Job summary

Sii Poland in Szczecin is seeking a backend developer to join a fintech platform focused on expense management. You will design, build, and maintain microservices using Kotlin, collaborating with cross-functional teams across Platform and Services.

The role emphasizes reliability, scalability, code quality, and hands-on work with AWS/Kubernetes, PostgreSQL, and observability tools like JUnit and Grafana. Fluency in English and residing in Poland are required.

Qualifications

• Minimum 3 years of professional software development experience.

Responsibilities

• Designing, building, and maintaining microservices using Kotlin.
• Collaborating with cross-functional teams to deliver solutions across Platform, Services, SMB, and other domains.
• Supporting system performance monitoring and contributing to improvements in reliability and scalability.
• Participating in code reviews and maintaining high code quality standards.
• Contributing to the continuous improvement of code quality and system architecture.
• Troubleshooting and resolving technical issues.

Skills

Kotlin

Backend development

Microservices architecture

Cloud environments (AWS, Kubernetes)

Relational databases (PostgreSQL)

English language

Tools

JUnit

Grafana

PostgreSQL

AWS

Kubernetes

Job description

Sii Poland in Szczecin is seeking a backend developer to join a fintech platform focused on expense management. You will design, build, and maintain microservices using Kotlin, collaborating with cross-functional teams across Platform and Services.

The role emphasizes reliability, scalability, code quality, and hands-on work with AWS/Kubernetes, PostgreSQL, and observability tools like JUnit and Grafana. Fluency in English and residing in Poland are required.