Kotlin Backend Engineer - Fintech Microservices & Cloud

Sii Poland

Wrocław

On-site

PLN 140,000 - 210,000

Full time

28 hours 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 hiring for a backend-focused role developing a modern fintech platform in Wrocław. You will design, implement, and maintain Kotlin-based microservices, collaborating with cross-functional teams across multiple domains including Platform and Services to deliver scalable solutions.

The role emphasizes reliability, performance monitoring, and code quality through reviews and architecture improvements.

Qualifications

3+ years of professional software development.
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) as well as testing and 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 the continuous improvement of code quality and system architecture.
Troubleshooting and resolving technical issues.