Senior Kotlin/Java Backend Engineer — Relocation

Wypoon Technologies BV; Amsterdam; On-site; EUR 80,000 - 120,000; Full time

Benefits offered by this job

Competitive compensation

25 days paid vacation

Relocation support

30% ruling tax benefit

Travel reimbursement

Top-notch equipment

Professional development

Job summary

Arbeitnow is seeking an experienced backend engineer to design and implement scalable, event-driven services using Kotlin. You will work on microservices with REST/GraphQL APIs, contribute to distributed architectures, and help define infrastructure with Terraform or Bicep.

You will collaborate in Agile DevOps teams, participate in architecture discussions, and write well-tested code using TDD/BDD practices to ensure reliability and performance in high-traffic environments.

Qualifications

• Minimum of 5 years of professional experience.
• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• Solid background in Java, comfortable working in mixed Kotlin/Java codebases.
• Strong experience with Spring Boot (Kotlin DSL) or Kotlin-first frameworks like Ktor.
• Experience designing and scaling microservices, with a focus on performance and maintainability.
• Strong experience with distributed systems and event-driven architectures in high-traffic environments.
• Familiarity with messaging systems (Kafka, RabbitMQ) and databases (Cassandra, PostgreSQL).
• Proficiency in API design patterns (REST, GraphQL) and secure coding.
• Hands-on knowledge of Docker, Kubernetes, and cloud platforms (AWS, Azure, or GCP).
• Experience with CI/CD pipelines and Git-based workflows.
• Agile mindset

Responsibilities

• Develop scalable back-end services in Kotlin, using frameworks like Ktor or Spring Boot (Kotlin DSL).
• Design, build, and maintain event-driven microservices and APIs (REST or GraphQL).
• Write clean, maintainable, and well-tested code, applying TDD/BDD principles with tools like JUnit or MockK.
• Contribute to distributed architectures using Kafka, Cassandra, or similar technologies.
• Define infrastructure using Infrastructure-as-Code tools like Terraform or Bicep.
• Collaborate in Agile DevOps teams to ship and run production-ready software.
• Participate in code reviews, architecture discussions, and documentation writing.

Skills

Java

Kotlin

Spring Boot

Ktor

Microservices

REST/GraphQL API design

Distributed systems

Docker

Kubernetes

CI/CD

Agile mindset

Education

Bachelor's degree in Computer Science or related field

Tools

Terraform

Bicep

RabbitMQ

Cassandra

PostgreSQL

AWS

GCP

Job description

Key Responsibilities

Develop scalable back-end services in Kotlin, using frameworks like Ktor or Spring Boot (Kotlin DSL).

Design, build, and maintain event-driven microservices and APIs (REST or GraphQL).

Write clean, maintainable, and well-tested code, applying TDD/BDD principles with tools like JUnit or MockK.

Contribute to distributed architectures using Kafka, Cassandra, or similar technologies.

Define infrastructure using Infrastructure-as-Code tools like Terraform or Bicep.

Collaborate in Agile DevOps teams to ship and run production-ready software.

Participate in code reviews, architecture discussions, and documentation writing.

Requirements

A minimum of 5 years of professional experience.

Advanced proficiency in theEnglish Language(at leastB2in speaking, writing, listening, and reading).

A minimum of a bachelor's degree in computer science, Software Engineering, or a related field.

Solid background in Java, comfortable working in mixed Kotlin/Java codebases.

Strong experience with Spring Boot (Kotlin DSL) or Kotlin-first frameworks like Ktor.

Experience designing and scaling microservices, with a focus on performance and maintainability.

Strong experience with distributed systems and event-driven architectures, ideally in high-traffic or mission-critical environments where scalability and reliability are essential.

Familiarity with messaging systems (Kafka, RabbitMQ) and databases (Cassandra, PostgreSQL).

Proficiency in API design patterns (REST, GraphQL) and secure coding.

Hands-on knowledge of Docker, Kubernetes, and cloud platforms (AWS, Azure, or GCP).

Experience with CI/CD pipelines and Git-based workflows.

Agile mindset

What We Offer

Competitive Compensation: Salary tailored to your skills and experience.

Generous Time Off: 25 paid vacation days (based on a 40-hour work week).

Relocation Support: A relocation and travel budget to ease your transition.

Tax Benefits: Eligibility for the 30% ruling.

Travel Reimbursement: We've got your daily commute covered.

Top-Notch Equipment: A high-quality device to ensure you work efficiently.

Professional Development: Financial support for certifications, technical training, and language courses—because we value your long-term career growth.

Comprehensive Relocation Assistance: Extensive support to help you settle in smoothly.

Community & Fun: Enjoy team events and connect with developers from around the globe!