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Offer summary
(Summary generated by AI based on the full job description)
The project involves aviation industry systems focused on platform modernization using AI and workflow automation. Core technologies include Java, Spring Boot, REST APIs, microservices, event-driven architecture and public cloud (preferably GCP). Responsibilities cover backend design, system and AI integration, development of scalable and highly available solutions, and building intelligent business workflows.
from: 10 June 2026
to: 10 July 2026
salary not specifiedB2B contract (full-time)
salary not specifiedcontract of employment
Offer parameters
level:senior
working mode:hybrid • full office
Kraków, Podgórze
Requirements
Expected technologies
Java
Spring Boot
REST
Event-Driven Architecture
OAuth2 / JW
Google Cloud Platform
Optional technologies
Orkes
Our requirements
- Minimum 5 years of experience in Java development
- Very good knowledge of Spring Boot
- Experience in building and integrating REST APIs
- Practical knowledge of microservices or event-driven architecture
- Experience with public cloud platforms (preferably GCP)
- Knowledge of security mechanisms (OAuth2, JWT)
- Understanding of scalable systems design principles
- Very good command of English
- Willingness to work in a hybrid model in Cracow
Optional
- Hands-on experience in integrating AI systems
- Knowledge of Identity & Access Management
- Experience working on large-scale projects
- Familiarity with workflow orchestration tools (e.g. Orkes)
Your responsibilities
- Designing and developing backend services supporting business processes
- Building and developing APIs and integrating systems within a distributed architecture
- Creating solutions based on event-driven architecture
- Integrating backend systems with modern AI solutions
- Participating in the design and development of intelligent workflows
- Collaborating with the team to optimize and enhance solutions
- Developing highly scalable and highly available systems
About the project
We are looking for a Senior Java Developer to join a project for a company from the aviation industry, one of the key providers of technology systems supporting the global aviation services ecosystem. The solutions developed within the project serve a wide network of business partners and end customers across multiple markets, operating in a large-scale environment with high availability requirements.
The project is carried out in one of the client’s main technology hubs, responsible for developing strategic products and delivering innovations with global reach. The teams work on expanding platforms that support complex business processes and integrations between multiple systems.
You will become part of a long-term platform modernization program focused on building AI-driven smart workflows that automate key processes and enable the development of a new generation of AI-based solutions.
What we offer
- Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
- Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
- We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
- Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
- Comfortable workplace – class A offices or remote work
- Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
- PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
- Investment in your growth – meetups, webinars, training platform and technology blog – you choose
- Fantastic atmosphere created by all Sii Power People
Recruitment stages
- 1.Send your CV
- 2.Talk to us about your expectations
- 3.Learn more about our projects and choose the best
- 4.Start your adventure with Sii!
Sii Sp. z o.o.
Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.
Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.
This is how we work
Senior Java Developer — aviation industry (f/m/x)
I apply to:
Sii Sp. z o.o.
Kraków, Podgórze
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