Backend Engineer (Java, Kotlin, Spring Boot)

Quick Facts

• Role: Backend Engineer (Java, Kotlin, Spring Boot) focused on B2B systems

Description

Work on scalable B2B backend services, APIs, and integrations that support digital customer experience, sales processes, and services in an event-driven environment. Develop and maintain solutions using Kotlin/Java and Spring Boot, Kafka-based asynchronous processing, and PostgreSQL data models. Collaborate with engineers, product owners, and architects to deliver reliable and maintainable backend capabilities.

Responsibilities

• Develop and maintain backend services, APIs, and integrations using Kotlin, Java, and Spring Boot

• Translate business and B2B customer requirements into scalable backend solutions

• Contribute to event-driven architectures and asynchronous processing with Kafka

• Integrate backend systems in cloud-native and containerized environments

• Design and maintain data models and persistence layers with PostgreSQL

• Collaborate with product, business, and engineering teams to refine requirements and deliver features

• Improve code quality through testing, observability, and reliability practices

• Use AI-powered development tools to improve productivity and code quality

Requirements

• Completed university degree in Computer Science or comparable technical field

• 3–5 years of professional backend development experience with Kotlin or Java using Spring Boot

• Good understanding of REST APIs, microservices, and distributed systems

• Hands-on experience or exposure to Kafka or similar messaging systems

• Experience with PostgreSQL and designing reliable data models

• Familiarity with CI/CD, containerization, and basic security concepts (OAuth 2.0, IAM)

• Strong communication skills in English and Polish; readiness to work in a hybrid model in Katowice

Benefits

• Motivizer Benefits Platform with a monthly budget (550 PLN) for medical care, meal tickets, sports cards (e.g., Multisport), cinema tickets, shop vouchers, discounts, and more

• Language courses via a multi-language learning platform

• Regular training opportunities (internal and external)

• Community events including networking events, coding challenges, and company parties