Kotlin Developer (f/m/x)

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 addressing technical debt and guiding the team through technical challenges and migrations

Minimum 5 years of professional experience in software development
Expertise in server-side languages, especially Kotlin, and experience with distributed systems, microservices, and cloud environments (e.g., AWS, Kubernetes)
Proficiency with relational databases like PostgreSQL, testing frameworks (e.g., JUnit, Testcontainers), and observability tools like Grafana
Strong problem-solving skills and a collaborative mindset to mentor and upskill your teammates
Very good knowledge of English - min. B2 level
Fluent in Polish required
Residing in Poland required

Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
Comfortable workplace – class A offices or remote work
Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
Investment in your growth – meetups, webinars, training platform and technology blog – you choose
Fantastic atmosphere created by all Sii Power People

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