Java Backend Developer - Contingent

Public Trust Eligibility Required

This is a contingent position, meaning employment is dependent upon the successful award of the associated contract to Aretum and completion of any required background investigation or security clearance verification.

Aretum is a mission-driven organization committed to delivering innovative, technology-enabled solutions to our customers across defense, civilian, and homeland security sectors. Our teams work at the intersection of strategy, technology, and transformation, helping agencies solve their most critical challenges. We believe in investing in our people and creating a culture where collaboration, inclusion, and professional growth are at the forefront.

Aretum is seeking a Java Backend Developer to join our team supporting a large-scale federal technology modernization program. As a Java Backend Developer, you will be embedded within a cross-functional Agile scrum team, participating in the design of software tools and subsystems that support reuse and domain analysis, and assisting senior Applications Engineers and Application Programmers in interpreting software requirements and design specifications to code, integrate, and test software components.

Your primary focus will be Java backend services running as containerized microservices in an AWS cloud-native environment, with additional work in Python where required. You will write production code, author and maintain unit and integration tests, participate in peer code review, support release engineering through Git Lab CI/CD pipelines, and participate in all sprint ceremonies within a SAFe Agile framework.

This role is a hands‑on development position intended for a developer who is productive independently on well‑scoped tasks while continuing to grow under the guidance of senior engineers.

Due to the nature of our work as a federal consulting organization, employees may be expected to handle Controlled Unclassified Information (CUI) and must adhere to applicable safeguarding and compliance requirements.

• Participate in the design of software tools, subsystems, and reusable components, contributing to domain analysis and design discussions led by senior engineers
• Assist Applications Engineers and senior Application Programmers in interpreting software requirements and design specifications into working, tested code
• Integrate and test software components, ensuring that units, modules, and services work together correctly across the microservices architecture
• Design, develop, test, and maintain Java backend microservices and REST APIs, following established coding standards, architectural patterns, and the program's Definition of Done
• Work with Postgre
  
  SQL databases, including schema design, writing and optimizing SQL queries, and implementing data access layers
• Integrate backend services with Elasticsearch / Open Search for search indexing and with AWS S3 for file storage, AWS SNS and SQS for event‑based messaging, and AWS RDS for relational persistence
• Build and maintain containerized Java services that run on AWS Elastic Container Service, ensuring services are observable, resilient, and ready for deployment to isolated VPC networking environments
• Contribute to Python backend services where the team's work requires it, applying the same standards of testability, readability, and maintainability
• Author and maintain unit tests and integration tests for backend code, supporting the program's test automation strategy and code coverage expectations
• Support and maintain Git Lab CI/CD pipelines for backend services, including build, test, scan, and deployment stages
• Contribute to infrastructure‑as‑code in Terraform under the guidance of senior engineers, and support peer review of infrastructure changes
• Participate actively in peer code review, both submitting code for review and reviewing teammates' code against agreed standards
• Participate fully in SAFe Agile ceremonies (Sprint Planning, Daily Standup, Sprint Review, Retrospective, and Backlog Refinement) providing accurate estimates and status updates on assigned work
• Break down assigned user stories into appropriately sized…