Kotlin Backend Engineer — Fintech Microservices

Sii Poland

Łódź

On-site

PLN 120,000 - 190,000

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 developer to design, build, and maintain microservices in Kotlin for a fintech platform. You will work with cross-functional teams to deliver scalable solutions and help ensure performance and reliability across the system architecture.

The role requires 3+ years of experience in software development, strong Kotlin skills, and hands-on knowledge of cloud environments and database/observability tools.

Qualifications

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

Responsibilities

  • Designing, building, and maintaining microservices using Kotlin.
  • Collaborating with cross-functional teams across Platform, Services, SMB, and other domains.
  • Supporting performance monitoring and 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.

Skills

Kotlin
Backend development
Microservices
Cloud environments
PostgreSQL
Observability tools
English

Tools

AWS
Kubernetes
PostgreSQL
JUnit
Grafana

Job description

Sii Poland is seeking a backend developer to design, build, and maintain microservices in Kotlin for a fintech platform. You will work with cross-functional teams to deliver scalable solutions and help ensure performance and reliability across the system architecture.

The role requires 3+ years of experience in software development, strong Kotlin skills, and hands-on knowledge of cloud environments and database/observability tools.

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