Software Engineer (all humans) #java

Make a difference in the financial life of millions of people: At Erste Digital you are co-creating the digital future, in which better financial health is possible. #believeinyourself

We are part of Erste Group - the largest banking group in Central and Eastern Europe with more than 2,500 branches and over 45,000 employees. Our more than 2,000 IT experts and enthusiasts are the bank's Digital Muscle.

What to do:

• Design and extend transpiler/compiler components (ANTLR4 grammars, lexers, parsers, AST/IR models) that translate legacy Natural source code into modern Java (Spring Boot) applications, ensuring generated output is correct, idiomatic, and enterprise-architecture compliant.

• Develop and maintain the translation pipeline in Java: AST-to-IR mappers, IR-to-Java lowering passes, code generators (Spring services, repositories, DTOs), and REST APIs that expose transpilation as a service.

• Define and validate translation correctness by writing unit and integration tests against representative source fixtures and verifying that generated Java code compiles and behaves as expected.

• Diagnose and fix defects surfaced during transpilation (e.g., malformed generated code, incorrect type or naming mappings) by tracing root causes through the pipeline

• Support build, integration, and operational readiness for the transpiler service: Maven build health, CI pipeline stability, source-control integration, and troubleshooting for downstream teams consuming generated projects.

Requirements

You check these boxes:

• Professional experience in Java development; comfortable working in a Spring Boot codebase.

• Solid understanding of software design principles, algorithms, and data structures.

• Experience with REST APIs and service integration.

• Strong debugging and troubleshooting skills, especially reasoning through multi-stage data pipelines

• Experience with Git and collaborative development workflows (branches, PRs, code review).

• Familiarity with automated testing (JUnit or similar) and quality assurance practices.

• Understanding of secure software development practices.

• Ability to work effectively with architects and stakeholders, including reading and reasoning about unfamiliar or legacy source languages.

Nice to have:

• Experience with ANTLR4 (or another parser generator), lexers, parsers, grammars, and Abstract Syntax Trees.

• Experience building or maintaining source-to-source transpilers, compilers, or static analysis tools.

• Experience with intermediate representations (IR) and multi-pass lowering/transformation pipelines.

• Familiarity with legacy mainframe languages (Natural/Adabas, COBOL, or similar) is a plus but not required.

• Experience with CI/CD pipelines and scripting for build/test automation.

• Familiarity with cloud-native/containerized environments.

• Knowledge of ITIL-based operational processes and production support/monitoring concepts.

Why you will like us:

• Possibility to benefit and learn from our international, talented and passionate community at Erste

• Interest groups and clubs: Take part in discussions and get involved in projects. Numerous interest groups invite you to engage with a topic

• Health Centre - The Erste Campus operates a fully equipped health center that offers all employees a high standard of medical services during working hours.

• Employee benefits - Benefit from special conditions for financial services and insurances, supermarkets, clothing stores and many more.

• Employee Referral Program - Become a talent scout for career opportunities in IT. We are rewarding every successful referral for Erste Digital

• A competitive and performance-related salary dependent on your professional and personal qualifications is granted - the minimum wage for this position in accordance with the respective collective agreement is EUR 51.134,-gross per year. But this is just a formality, we are more than happy to discuss your actual expectations.

The way we are:

Erste Group considers the diversity of its employees as key to innovation and success. As employer we are proud to offer everyone equal chances, irrespective of age, skin colour, religious belief, gender, sexual orientation or origin.