Senior Backend Engineer: AI-Driven Kotlin & Cloud

Slashhash; Amsterdam; Hybrid; EUR 90,000 - 130,000; Full time

Job summary

Fastned is seeking a Senior Backend Engineer to join its Charging team in Amsterdam. You will design and implement scalable, highly available backend services using Kotlin, Java, Spring Boot, AWS, Kubernetes and Kafka, ensuring robustness for a growing European charging network.

You should bring 7+ years of backend experience and an AI-first mindset. Expect collaboration across engineering, platform teams and stakeholders to drive performance, reliability and security.

Qualifications

• 7+ years of backend experience required.
• Strong Kotlin/Java skills required.
• AI-first mindset and ability to work with modern AI tooling.

Responsibilities

• Design and build scalable, high-availability backend services for the charging platform.
• Collaborate on architecture with emphasis on Kotlin, Java, Spring Boot, AWS, Kubernetes and Kafka.

Skills

Kotlin

Java

AWS

Kubernetes

Docker

Apache Kafka

SQL

PostgreSQL

GitLab CI/CD

REST APIs

Microservices

Event-driven architecture

AI tooling

Claude Code

AI-first mindset

Tools

Docker

Kubernetes

Apache Kafka

PostgreSQL

GitLab CI/CD

Job description

Fastned is seeking a Senior Backend Engineer to join its Charging team in Amsterdam. You will design and implement scalable, highly available backend services using Kotlin, Java, Spring Boot, AWS, Kubernetes and Kafka, ensuring robustness for a growing European charging network.

You should bring 7+ years of backend experience and an AI-first mindset. Expect collaboration across engineering, platform teams and stakeholders to drive performance, reliability and security.