Kotlin Backend Engineer for Fintech Microservices

Sii Poland

Katowice

On-site

PLN 180,000 - 240,000

Full time

4 days ago
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Benefits offered by this job

Great Place to Work
Solid financial situation
Contracts with big brands
Centre of internal trainings
Many experts to learn from
Profit sharing
MySii app
Medical care

Job summary

Sii Poland is hiring for a backend-focused role on a modern fintech platform in Katowice. You will design, build, and maintain Kotlin-based microservices, collaborating across Platform and Services domains to deliver scalable solutions.

The ideal candidate has 3+ years of experience, solid Kotlin skills, and a good understanding of cloud environments, PostgreSQL, and observability tools. English proficiency and Polish residency are required.

Qualifications

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

Responsibilities

  • Designing, building, and maintaining microservices using Kotlin.
  • Collaborating with cross-functional teams to deliver solutions across domains.
  • Supporting system performance monitoring and scalability improvements.
  • Participating in code reviews and upholding high code quality.
  • Contributing to continuous improvements in code and architecture.
  • Troubleshooting and resolving technical issues.

Skills

Kotlin
Backend development
Microservices
Cloud (AWS/Kubernetes)
PostgreSQL
Testing/Observability (JUnit, Grafana)
English

Tools

Kubernetes
JUnit
Grafana

Job description

Sii Poland is hiring for a backend-focused role on a modern fintech platform in Katowice. You will design, build, and maintain Kotlin-based microservices, collaborating across Platform and Services domains to deliver scalable solutions.

The ideal candidate has 3+ years of experience, solid Kotlin skills, and a good understanding of cloud environments, PostgreSQL, and observability tools. English proficiency and Polish residency are required.

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