Senior Backend Engineer (Kotlin/Java) — Production-grade

Michael Bailey Associates; Randstad; On-site; EUR 90,000 - 130,000; Full time

Job summary

Michael Bailey Associates is assisting a major Dutch client in Randstad to hire a Senior Backend Engineer specializing in Kotlin/Java. You will shape backend services with clean, production-grade code and ownership of critical components.

You’ll work with Spring Boot on cloud platforms (Azure or GCP), manage SQL/NoSQL data, and run services in Kubernetes with CI/CD. Collaboration with engineers and stakeholders is key, and experience with AI-assisted development is a plus.

Qualifications

• 8+ years of backend engineering experience in fast-moving environments.
• Strong hands-on Kotlin and/or Java (JVM) with Spring Boot.
• Solid cloud experience (Azure, GCP or similar).
• Deep understanding of craftsmanship, clean code, and design patterns.
• Experience with SQL and NoSQL databases.
• Day-to-day Kubernetes and CI/CD in production.
• Independent, proactive communicator who moves fast when needed.

Responsibilities

• Build, own, and operate backend services in Kotlin or Java with Spring Boot on cloud infra.
• Write clean, well-tested code with comprehensive test coverage.
• Run services in production: CI/CD, incident response, and Kubernetes improvements.
• Apply design patterns and clean code to keep systems healthy at scale.
• Work with SQL and NoSQL databases and choose the right one for the job.
• Collaborate with engineers and business stakeholders and shape team culture.
• Use AI-assisted development tools where they add value.

Skills

Kotlin

Java

Spring Boot

Cloud: Azure/GCP

Kubernetes

CI/CD

SQL/NoSQL

Clean code & patterns

Job description

Michael Bailey Associates is assisting a major Dutch client in Randstad to hire a Senior Backend Engineer specializing in Kotlin/Java. You will shape backend services with clean, production-grade code and ownership of critical components.

You’ll work with Spring Boot on cloud platforms (Azure or GCP), manage SQL/NoSQL data, and run services in Kubernetes with CI/CD. Collaboration with engineers and stakeholders is key, and experience with AI-assisted development is a plus.