Senior Backend Engineer: Java/Kotlin, Microservices, Hybrid

LeoVegas Mobile Gaming Group; Warszawa; Hybrid; PLN 220,000 - 320,000; Full time

Job summary

LeoVegas Mobile Gaming Group is seeking a Senior Backend Engineer to join the Retention domain. You will build scalable backend solutions in a microservice architecture using Java and Kotlin, collaborating with cross‑functional teams to deliver value‑generating features across our products.

This role emphasizes end‑to‑end ownership, strong collaboration with operations and stakeholders, and driving high‑quality initiatives.

Qualifications

• Minimum of 4+ years of experience working as a back-end developer with Java and/or Kotlin.
• Experience with messaging tools (i.e. Kafka).
• Experience with microservice architecture.
• You have experience with common Java frameworks such as Spring and JPA.
• MySQL relational databases are not something new for you.
• Experience with AI tools like Claude.

Responsibilities

• Build scalable, robust and efficient backend solutions in our full-stack team and ensure the continuous delivery in a microservice architecture.
• Participate in technical discussions to challenge, propose, evaluate, and guide business needs.
• Work closely with operational units and stakeholders.
• Drive your own initiatives with a high-quality mindset.
• Work within the full chain of development, having end-to-end responsibilities.
• Collaborate across the organisation with other domains.

Skills

Java/Kotlin

Kafka

Microservices

Spring

JPA

MySQL

Claude AI

Tools

Kubernetes

OpenAPI

BigQuery

Job description

LeoVegas Mobile Gaming Group is seeking a Senior Backend Engineer to join the Retention domain. You will build scalable backend solutions in a microservice architecture using Java and Kotlin, collaborating with cross‑functional teams to deliver value‑generating features across our products.

This role emphasizes end‑to‑end ownership, strong collaboration with operations and stakeholders, and driving high‑quality initiatives.