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.
- 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.
- 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
Skills Required
- Commercial experience with Kotlin
- Hands-on experience with BigQuery in production
- Experience with OLAP serving layers and analytical query systems
- Background in backend architecture and API design
- Experience building production-grade distributed systems
- Understanding of modern software engineering best practices
- Professional level of English
- Currently based in the European Union
What We Do
N-iX is a global software solutions and engineering services company that helps world’s leading organizations turn challenges into lasting business value, operational efficiency, and revenue growth using advanced technology. Whether you need to build a custom solution, modernize your digital product or acquire extra tech expertise - we have the experience and capabilities to ensure your success. With over 2,000 professionals in 25 countries across Europe and the Americas, N-iX offers expert solutions in cloud, data analytics, embedded software, IoT, AI, machine learning, and other tech domains. Being in business for over two decades, we have worked with dozens of industry-leading enterprises and Fortune 500 companies creating value across a wide variety of sectors, including finance, manufacturing, supply chain, retail, e-commerce, healthcare, and more. Our unique combination of business domain expertise and technical know-how enables us to effectively collaborate with ISVs, tech companies, and enterprises of all sizes. Thanks to the strong tech ecosystem and partnerships with AWS, GCP, Microsoft, SAP, OpenText, Snowflake, and others, we bring extra speed, scale and efficiency to more than 160 organizations across the globe. N-iX is recognized by numerous industry awards, such as CRN Solution Provider 500, Global Outsourcing 100 by IAOP, ISG Provider Lens™, Modern Application Development services providers by Forrester, etc
