Senior Kotlin Software Engineer

Job description

Work type: Office/Remote Technical Level: Senior Job Category: Software Development N-iX is looking for a Senior Kotlin Software Engineer to join a new engagement with a leading European fintech company. This is an exciting opportunity to become part of a modern engineering organization that is redefining how businesses manage corporate spending through innovative financial technology solutions. The company is building an AI-native engineering environment where developers leverage cutting-edge AI tools throughout the software development lifecycle. You'll work within cross-functional product squads, contributing to both existing platforms and new product initiatives while helping shape scalable, data-driven backend services. Responsibilities: - Design and develop scalable backend services using Kotlin. - Build and own clean API layers serving both internal and customer-facing products. - Work at the intersection of backend engineering and data platforms, integrating analytical data into product experiences. - Develop solutions leveraging BigQuery and OLAP serving layers. - Collaborate closely with cross-functional engineering teams in an agile environment. - Apply AI-assisted development practices using modern engineering tools. - Contribute to high-quality, maintainable, and scalable software architecture. Requirements: - Strong commercial experience with Kotlin. - Hands-on experience with BigQuery in production environments. - Experience working with OLAP serving layers and analytical query systems. - Experience with AI-assisted development tools such as GitHub Copilot or Claude Code. - Solid background in backend architecture and API design. - Experience building production-grade distributed systems. - Strong understanding of modern software engineering best practices. - Professional level of English. - Currently based in the European Union. Nice to have: - Java experience. - PostgreSQL. - AWS and/or GCP. - Experience with REST and/or gRPC APIs. We offer*: - Flexible working format - remote, office-based or flexible - A competitive salary and good compensation package - Personalized career growth - Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) - Active tech communities with regular knowledge sharing - Education reimbursement - Memorable anniversary presents - Corporate events and team buildings - Other location-specific benefits *not applicable for freelancers