Senior Java Infrastructure Engineer
First seen by Alion on Oct 8, 2026.
This role focuses on executing critical migration projects within the backend infrastructure. The Backend Infrastructure team is undertaking several large-scale migrations to modernize its systems, improve reliability, and reduce maintenance overhead. This TVC position will be instrumental in performing the hands-on work required for these migrations, working closely with the infrastructure team and other BackEnd teams.
Required Qualifications:
Ability to work from our Warsaw office
5+ years of hands-on experience in Java programming.
Strong communication and interpersonal skills, with the ability to collaborate effectively within a technical team environment.
At least Upper-Intermediate level of both spoken and written English
Bachelor’s degree in Computer Science, Software Engineering, or a related technical field, or equivalent practical experience.
Nice-to-Haves:
Experience with build tools such as Gradle, Maven, or Bazel.
Experience with building data pipelines.
Knowledge of Google Cloud Platform (GCP) services.
Responsibilities
Execute Migrations: Actively participate in and drive the execution of large-scale code and system migrations across various backend services. Some examples include: Importing or upgrading third-party dependencies.
Building projects on GoB(Gerrit-on-Borg).
Performing necessary code and dependency changes in backend projects
Code Modification and Updates: Update and refactor existing codebases (primarily Java) to align with new libraries, platforms, and infrastructure.
Testing: Work with the Infrastructure team to create a testing plan for migrations to ensure that changes do not break running services and execute the test plans.
Collaboration: Work closely with the Backend Infrastructure team and other BE software engineers to understand migration requirements, plan execution strategies, and ensure smooth transitions with minimal disruption.
Problem Solving: Investigate, debug, and resolve technical issues and complexities encountered during the migration processes.
Documentation: Maintain clear and concise documentation for migration plans, processes, changes made, and outcomes.
Best Practices: Adhere to software development best practices, ensuring code quality, and follow established guidelines for infrastructure changes.
We offer:
Opportunity to work on a global product used by 100+ million users worldwide.
Competitive compensation package, including 20 paid vacation days and paid sick leave.
Full-time office-based work (5 days per week) in a modern, comfortable office in Warsaw.
Flexible working hours with a healthy work-life balance.
Private medical insurance.
English classes with a native speaker and wellness activities, including online yoga.
Paid tech training and other activities for professional growth;
Modern, comfortable office and a friendly, supportive engineering culture.
If your qualifications and experience match the requirements of the position, our recruitment team will reach out to you in a week maximum. Please rest assured that we carefully consider each candidate, but due to the amount of applications, the review and further processing of your candidacy may take some time.