Kotlin Backend Engineer — Fintech Microservices

Sii Poland

Szczecin

On-site

PLN 180,000 - 240,000

Full time

6 days ago

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Benefits offered by this job

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Profit sharing

Passion Sponsorship program

Regular integration events and trips

Comfortable and well-equipped offices

MySii app

Medical care

Job summary

Sii Poland is seeking a backend engineer to join a modern fintech platform focused on company expense management. You will design and maintain Kotlin microservices, collaborate with cross-functional teams, and contribute to reliability and scalability of the system.

Ideal candidates have 3+ years of experience, proficiency in Kotlin and microservices, cloud basics (AWS/Kubernetes), and strong English skills.

Qualifications

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

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 continuous improvement of code quality and system architecture.
Troubleshooting and resolving technical issues.