Kotlin Backend Engineer - Fintech Microservices

Sii Poland

Katowice

On-site

PLN 120,000 - 160,000

Full time

4 days ago

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Benefits offered by this job

Great Place to Work

Solid financial situation

Contracts with leading brands

Centre of internal trainings

Learn from industry experts

Open and accessible management

Profit sharing

MySii app access

Medical care

Job summary

Sii Poland is seeking a skilled backend engineer to join a fintech platform focused on expense management and integration with banks, accounting, and HR systems. You will design, build, and maintain Kotlin microservices, collaborating with cross-functional teams across Platform, Services, SMB, and other domains.

The role emphasizes performance, reliability, and architecture improvements, code reviews, troubleshooting, and continuous quality.

Qualifications

Minimum 3 years of professional software development experience.
Hands-on Kotlin experience in commercial projects.
Experience building backend systems with microservices.
Basic experience with cloud environments (AWS, Kubernetes).
Experience with PostgreSQL and testing/observability tools (JUnit, Grafana).
Good command of English.
Residing in Poland is required.

Responsibilities

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