Kotlin Developer (f/m/x)

Sii Sp. z o.o. is looking for a skilled Kotlin Developer to join a team working on a modern fintech platform dedicated to company expense management. This project focuses on developing financial solutions that integrate payment cards, expense management, and invoice handling directly into partner systems, helping companies automate settlements and gain real-time control over their spending.

Key responsibilities

• Leading initiatives to design, build, and maintain scalable microservices primarily using Kotlin.
• Collaborating with cross-functional teams to develop innovative solutions across various 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 while leading the team through technical challenges.

Requirements

• 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 like AWS and Kubernetes.
• Proficiency with relational databases like PostgreSQL, testing frameworks, and observability tools.
• Strong problem-solving skills and a collaborative mindset to mentor and upskill teammates.
• Very good knowledge of English, minimum B2 level.

What we offer

• Employment stability within a leading technology consulting company with a strong market position.
• Attractive benefits package including private healthcare and a benefits cafeteria platform.
• Investment in professional growth through access to meetups, webinars, a training platform, and a technology blog.
• A culture that supports employee ideas and voluntary actions through dedicated funding.
• A friendly and inclusive work environment recognized by the Great Place to Work title.