About the Position

Software Engineer at Sii

Join our team in Białystok, Poland, as a Software Engineer with expertise in Kotlin, AWS, Kubernetes, and Microservices. We are looking for a professional to contribute to a modern fintech platform that supports company expense management.

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

Requirements

Minimum 3 years of professional experience in 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 (e.g., PostgreSQL) as well as testing and observability tools (e.g., JUnit, Grafana)
Good command of English
Residing in Poland required

Salary

6000-8000 PLN per hour

Core Skills

Kotlin
AWS
Kubernetes
Microservices
PostgreSQL
JUnit 5

Benefits

Great Place to Work
Stable financial standing
Contracts with major global brands
Internal training center
Many experts to learn from
Open and accessible management team
Profit sharing
Passion Sponsorship Program
Regular integration events and trips
Comfortable and well-equipped offices
MySii app
Health insurance

About the Company

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Software Engineer

Job description