Kotlin Developer

inFakt is a company at the intersection of technology and accounting, focused on automating and implementing advanced technologies. They develop and improve an accounting application supporting over 400,000 entrepreneurs daily. The Kraków office employs about 50 specialists across IT, accounting, customer service, and sales, with the largest team in IT programming in Ruby, Python, and Swift. The company practices Scrum and participates in industry conferences and community events such as KRUG.

• Minimum 5 years of commercial experience in backend application development using Java or Kotlin
• Very good knowledge of Kotlin
• Experience with Spring Boot or Ktor frameworks
• Experience with Spring Security
• Good knowledge of Gradle (with Kotlin DSL)
• Experience working with relational databases (PostgreSQL)
• Practical knowledge of architecture: microservices, asynchronous communication (e.g., RabbitMQ), and design patterns
• Writing tests using JUnit and Kotest as standard practice
• Use of AI tools in development

Nice to have:

• Interest in the product and understanding the business purpose of the code
• Experience working in an environment where developer opinions matter and influence functionality
• Understanding of modern architecture (microservices, REST API, RPC) and relational databases
• Proactivity and seeking smart solutions to ease work for self and team
• Openness to using the latest technologies including AI-supported tools
• Culture of mutual support and knowledge sharing

• Build services from scratch with real impact on technology without technical debt
• Ensure performance and scalability of a system serving tens of thousands of clients
• Use AI tools such as Claude Code, GitHub Copilot, and Cursor daily to support software development