Senior Java Backend Developer (Flowable / BPM)

Quick Facts

• Role: Senior Java Backend Developer (Flowable / BPM)

• Focus: Real-time streaming and time-series platforms, microservices, BPM processes

• Work model: Hybrid; full-time; flexible start 8:00–9:00; 3 days/week in Kraków office

• Contract: 1 year with possibility to extend

• Language: English (min. B2); Polish welcome

Description

Build and develop high-performance real-time platforms for streaming and time-series data using Java and Spring Boot within a microservices architecture. Implement business processes using Flowable BPM (or a similar engine), integrate with Kafka and Azure, and secure solutions with Azure AD and OAuth. Collaborate with international technical teams to translate business requirements into globally deployed solutions.

Responsibilities

• Design and develop solutions using Java, Spring Boot, and microservices architecture

• Build real-time, high-throughput streaming and time-series data platforms

• Develop using Kafka and Azure services

• Secure solutions with Azure AD and OAuth

• Work with Flowable BPM (or similar process engines)

• Translate business requirements into solutions deployed across global environments

Requirements

• 10+ years of commercial experience as a Java Developer

• Strong knowledge of Java, Spring Boot, and microservices architecture

• Practical day-to-day experience with Kafka, Kubernetes, and Maven

• Knowledge of Azure (including Azure AD and OAuth), plus REST and Docker

• Experience with JPA or iBatis and databases such as PostgreSQL, CosmosDB, or Redis

• Experience building streaming-based real-time systems

• Experience with modern software engineering practices (AI-assisted development) and good SDLC knowledge

• English level at least B2 for technical discussions in an international team

• Ability to work under a B2B arrangement in Poland (or to set one up)

Benefits

• Rate: 140–170 PLN/h net + VAT (B2B)

• Long-term collaboration; first contract for 1 year with extension option

• Stable client in the banking sector

• Work on challenging real-time systems

• Modern stack (Kafka, Kubernetes, Azure)

• International team environment

• Flexible working-day start (8:00–9:00)

• Medical and sports package

• Free accounting support (up to 3 entries/month)

• Work equipment provided by the client

• Transparent cooperation terms with a stable market position