Senior Kotlin Engineer

About the Position

N-iX is looking for a Senior Kotlin Engineer to join our team.

Our client is a fast-growing European fintech company in the business spend management space. Products include smart corporate cards, software for business analytics optimization, and automated invoice management. Operates primarily in Europe, serving SME and mid-sized business customers in a regulated environment (GDPR). We're looking for a Senior Back-End Engineer to design, build and operate scalable Kotlin microservices on AWS, increasing delivery throughput without compromising quality.

Responsibilities

• Design, build and operate scalable Kotlin microservices on AWS.
• Apply AI-native delivery practices across the CDLC to increase delivery throughput without compromising quality.
• Work with distributed systems, relational databases (e.g. PostgreSQL), and observability tooling (e.g. Grafana) in production.
• Multiply the output and quality of the squad you join, and share patterns/practice beyond your immediate team so adoption compounds across the organisation.
• Embed directly into a client squad as a hands-on Individual Contributor (not a coaching/managerial role).

Requirements

• 5+ years of commercial backend engineering
• Kotlin; scalable microservices on AWS.
• AI-native delivery practices applied across the CDLC
• Production experience with distributed systems
• Relational databases, e.g. PostgreSQL
• Observability tooling, e.g. Grafana
• Excellent English communication skills
• Experience working in Agile / Scrum / Kanban

Nice to Have

• Specific AWS services (EKS, Lambda, SQS) or Prometheus

We Offer

• Opportunity to work with a fast-growing European fintech company
• Remote work options
• Be part of a team that designs, builds, and operates scalable Kotlin microservices on AWS

About the Company

N-iX is a global software development company with a focus on delivering innovative solutions in the fintech, healthcare, and other industries. We pride ourselves on our collaborative culture and commitment to excellence.

Work Location

• Location: European Union
• Work Type: Remote
• Employment Type: Full-time
• Experience Level: Senior