Kotlin Backend Engineer – Fintech Microservices & Cloud

Sii Poland

Bydgoszcz

On-site

PLN 180,000 - 240,000

Full time

29 hours ago

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Benefits offered by this job

Great Place to Work

Centre of internal trainings

Profit sharing

MySii app

Medical care

Regular integration events and trips

Job summary

Sii Poland is hiring a Kotlin-focused backend engineer to design, build, and maintain microservices for a fintech platform. You will collaborate with cross-functional teams across Platform, Services, SMB, and other domains to drive scalable solutions.

Applicants should have 3+ years in software development, strong Kotlin, microservices, and cloud experience, plus English proficiency. Poland-residency is required and they offer a broad benefits package.

Qualifications

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

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 improving reliability and scalability.
Participating in code reviews and maintaining high code quality standards.
Contributing to continuous improvement of code quality and system architecture.
Troubleshooting and resolving technical issues.