Senior Full-Stack Java Engineer

International Logic Systems•Fairfax, VA

4d•Hybrid

About The Position

ILS Inc. is seeking a Senior Full-Stack Java Engineer with strong Spring Boot backend expertise and solid frontend development skills to support a major federal modernization initiative. The ideal candidate is comfortable developing both backend services and user interfaces, and has experience working in Agile, cloud-based environments. This hybrid role requires in-office presence two days per week in Fairfax, VA. MUST BE LOCAL TO DC METRO AREA (hybrid support - 2 days in ILS HQ office, located in Fairfax, VA 22033). It’s a great opportunity to work in an Agile, cloud-based environment , contributing to impactful federal projects. Design, develop, and maintain scalable microservices using Java 17+ and Spring Boot . Build RESTful APIs and backend services that integrate with relational databases and external systems. Contribute to the development of responsive user interfaces using Angular or similar modern JavaScript frameworks. Participate in cloud migration efforts and application deployment on AWS . Write unit and integration tests using JUnit , Mockito , and Cucumber . Collaborate with DevOps to support CI/CD pipelines using Jenkins and containerization tools like Docker . Work closely with cross-functional teams including UI/UX, QA, and product owners in an Agile/Scrum environment. Troubleshoot issues across the full application stack and contribute to continuous improvements.

Requirements

Bachelor’s degree in computer science, Engineering, or a related field.
10+ years of professional experience in Java-based full-stack development .
Expert-level backend development with Spring Boot , REST APIs, and microservices architecture.
Proficiency in frontend technologies such as Angular , HTML5 , CSS , and JavaScript .
Experience with AWS , containerized deployments ( Docker ), and CI/CD automation ( Jenkins ).
Strong understanding of relational databases (PostgreSQL, Oracle, or SQL Server).
Solid grasp of software engineering principles, testing methodologies, and Agile development practices.

Nice To Haves

Experience with frontend unit testing frameworks (e.g., Jasmine, Karma).
Familiarity with tools like Maven , Gradle , Git , SoapUI , JMeter .
Prior experience in government , financial , or insurance systems is a plus.

Responsibilities

Team Lead and POC for the project.
Functions as SME and advocate for software applications.
Conveys the solution through architecture and design artifacts.
Acts as the bridge between enterprise architecture and applications development.
Identifies key performance issues early in the project and works with 3rd party vendors and enterprise-wide system teams to resolve issues.
Assures all tasks and deliverables are executed and delivered with quality.
Manages and reports on the status of all baselines; executes the project’s Quality Assurance Plan.
Provide presentations to all levels of management.
Design, develop, and maintain scalable microservices using Java 17+ and Spring Boot .
Build RESTful APIs and backend services that integrate with relational databases and external systems.
Contribute to the development of responsive user interfaces using Angular or similar modern JavaScript frameworks.
Participate in cloud migration efforts and application deployment on AWS .
Write unit and integration tests using JUnit , Mockito , and Cucumber .
Collaborate with DevOps to support CI/CD pipelines using Jenkins and containerization tools like Docker .
Work closely with cross-functional teams including UI/UX, QA, and product owners in an Agile/Scrum environment.
Troubleshoot issues across the full application stack and contribute to continuous improvements.