Senior Kotlin Lead - Fintech Microservices & Cloud
Sii Poland
An application made for this job — a tailored resume and cover letter that speak straight to the posting.
Benefits offered by this job
Job summary
Sii Poland is seeking a senior backend engineer to join a fintech platform focused on expense management and seamless integration with partner systems. You will design, build, and maintain scalable microservices primarily using Kotlin, collaborate across Platform, Services, SMB, and other domains, and drive performance improvements for reliability and scalability.
You'll participate in code reviews, guide teammates, and help lead migrations while mentoring others.
Qualifications
- 5+ years of professional software development experience.
- Expert in Kotlin and distributed systems with microservices experience.
- Experience with AWS, Kubernetes, PostgreSQL, and observability tools (Grafana).
- Strong problem-solving skills and collaborative mentoring mindset.
- Very good knowledge of English - min. B2 level.
- Residence in Poland is required.
Responsibilities
- Leading initiatives to design, build, and maintain scalable microservices primarily using Kotlin
- Collaborating with cross-functional teams to develop innovative solutions across Platform, Services, SMB, and other domains
- Analyzing system performance and implementing optimizations to ensure high reliability and scalability
- Participating in code reviews, post-mortems, and providing mentorship to other engineers
- Proactively improving the architecture and quality of solutions, and leading the team through technical challenges and migrations
Skills
Tools
Job description
Sii Poland is seeking a senior backend engineer to join a fintech platform focused on expense management and seamless integration with partner systems. You will design, build, and maintain scalable microservices primarily using Kotlin, collaborate across Platform, Services, SMB, and other domains, and drive performance improvements for reliability and scalability.
You'll participate in code reviews, guide teammates, and help lead migrations while mentoring others.
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