Java Backend Developer (Digital Hangar)

Expected, Java 17/21, REST API, Microservices Architecture, Apache Kafka, Kubernetes, Docker, Git, CI/CD, SQL, Azure, Event-Driven Architecture

Optional, OpenTelemetry, AI-powered applications

About the project, At Digital Hangar, we build large-scale digital products that serve customers and employees across Lufthansa Group airlines worldwide., By combining cloud-native technologies, DevOps practices, and AI-assisted development, our engineering teams deliver innovative solutions at scale. We actively explore emerging technologies such as AI agents, Agentic Engineering, and intelligent automation, integrating them into our products and development processes where they add real business value.

This is how we work, in house, you focus on a single project at a time, you have influence on the choice of tools and technologies, you have influence on the technological solutions applied, you focus on product development, agile, scrum

Your responsibilities, Design, develop and maintain scalable Java-based backend services, microservices and REST APIs., Build reliable synchronous and asynchronous integrations in distributed systems., Take ownership of technical solutions, from design and implementation to deployment and monitoring., Analyze complex problems, evaluate technical trade-offs and propose improvements to existing solutions., Apply AI-assisted development tools and explore new approaches to software engineering., Collaborate proactively with engineers and other stakeholders in international, cross-functional teams.

4+ years of professional Java backend development experience., Strong software engineering fundamentals and understanding of backend architecture., Practical experience designing backend solutions and making independent technical decisions., Solid understanding of microservices, distributed systems, REST APIs and synchronous/asynchronous communication., Experience with event-driven architecture (e.g. Kafka), containers, Kubernetes and CI/CD., Knowledge of software design principles, clean code and engineering best practices., Hands-on experience with AI-assisted development tools (e.g. GitHub Copilot, Cursor, Claude Code), including critical evaluation of AI-generated code., Ability to design and execute structured AI-assisted development workflows, including task decomposition, context management, clear acceptance criteria, iterative validation, automated testing, and well-defined quality gates., Strong analytical thinking, problem-solving skills, ownership and proactive communication., English B2/C1, enabling effective technical discussions in an international environment., Availability to work in a hybrid model – 2 days per week in our Gdańsk office.

Optional, Azure and cloud-native services., Observability / OpenTelemetry., AI-powered applications, LLMs, RAG, MCP or AI agents., Experience with Agile and cross-functional product teams.

What we offer, An international working environment, atmosphere that stimulates development., Individual career path., Lufthansa Group membership benefits., Flexible working time and place adjusted to employee’s needs. Possibility of starting your workday between 07:00 and 11:00., Support for your passion for sports within the local activity group and co-financing Multisport cards., Private medical care for employees and their family members., Life insurance., Stable employment under an employment contract., Modern office in Oliwa – great location and comfortable workspace., Atmosphere – small teams, high independence, real impact on the project.

Development opportunities we offer, external training, industry-specific e-learning platforms, intracompany training, mentoring, soft skills training, substantive support from technological leaders, technical knowledge exchange within the company

Benefits, sharing the costs of sports activities, private medical care, life insurance, flexible working time, fruits, corporate products and services at discounted prices, no dress code, coffee / tea, drinks, parking space for employees, leisure zone, extra social benefits, holiday funds, sharing the costs of holidays for kids, sharing the commuting costs

Lufthansa Systems, Lufthansa Systems Poland is acclaimed and widely recognized provider of superior services and IT solutions for the aeronautical, logistic and financial industries. As a part of the Lufthansa Group we implement technological solutions and dedicated services.

This is how we work,