Java Developer

Sienna Systems; Falls Church, Northern (VA, KY); Hybrid; USD 125,000 - 135,000; Full time

Benefits offered by this job

401(k) matching

Paid time off

Federal holidays

Hybrid schedule

Job summary

Sienna Systems Corporation invites a Java Developer to join a collaborative software team supporting the DHS CBP TASPO/TASPD program. This hybrid role is based in Northern Virginia, with design, development, testing, and support of Java applications and services across the lifecycle.

You will influence architectural decisions, contribute to code quality, and work with cross-functional teams including QA, product, and DevOps.

Qualifications

• U.S. citizenship and ability to obtain DHS/CBP background clearance.
• 4+ years of Java development with a Bachelor's degree, or 7 years without a degree.
• Strong knowledge of Java tooling and design patterns.
• Proficiency with SQL and relational databases.
• Experience with Git, pull requests, branching strategies, and code reviews.
• Experience with testing frameworks and maintaining tests.
• Experience with build pipelines and dependency management.
• Ability to diagnose issues with debugging, logging, and performance analysis.
• Ability to work independently and contribute to technical decisions.

Responsibilities

• Design, develop, test, and maintain Java applications and services.
• Develop and maintain RESTful APIs and system integrations.
• Translate requirements into reliable, maintainable software.
• Participate in code reviews and architectural discussions.
• Write unit and integration tests; maintain automated testing.
• Troubleshoot defects, performance issues, and production problems.
• Work with SQL databases to develop data-access components.
• Participate in Agile/Scrum ceremonies and collaboration across teams.
• Contribute to continuous improvement of code quality and processes.

Skills

Java development

SQL & relational DBs

Git & PR workflows

Debugging & performance

Agile/Scrum

Education

Bachelor's degree

Tools

Git

CI/CD pipelines

SQL tooling

Job description

Career Opportunities with Sienna Systems Corporation

A great place to work.

Careers At Sienna Systems Corporation

Current job opportunities are posted here as they become available.

Federal applications don't get rewritten every eighteen months. They get maintained, extended, and trusted — and somebody has to be good at that.

Sienna Systems is seeking a Java Developer to join a collaborative software development team supporting the U.S. Department of Homeland Security, Customs and Border Protection (CBP) TASPO/TASPD program. This is a hybrid role based in Northern Virginia.

You will design, develop, test, and support Java applications and services alongside other developers, QA, product, and DevOps team members. The team is small enough that your work is visible and your technical opinion carries weight — you will contribute to architectural decisions, not just tickets assigned to you.

Why You'll Want This Role:

• $125,000 – $135,000 based on experience
• A long-running, stable DHS program
• Real technical ownership: you will work independently on assigned projects and help set team standards
• Small-company visibility on a large-agency program
• 401(k) with 4% matching, immediate vesting, no restrictions
• 3 weeks Paid Time Off plus 11 Federal Holidays
• Hybrid schedule in Northern Virginia

Key Responsibilities:

• Design, develop, test, and maintain Java applications and services.
• Develop and maintain RESTful APIs and system integrations.
• Translate business and technical requirements into reliable, maintainable software.
• Participate in code reviews, technical discussions, and architectural decisions.
• Write unit and integration tests and help maintain automated testing.
• Troubleshoot application defects, performance issues, and production problems.
• Work with SQL databases to develop queries and data-access components.
• Participate in Agile/Scrum planning, estimation, stand-ups, and retrospectives.
• Collaborate with QA, product, DevOps, and other developers throughout the development lifecycle.
• Contribute to continuous improvement of application quality, development processes, and team standards.

Required Qualifications:

• US citizenship, and the ability to obtain and maintain a DHS/CBP background investigation. Work cannot begin until the investigation is adjudicated.
• 4 or more years of professional Java development with a Bachelor's degree, or 7 years without a degree
• Strong knowledge of current Java-centric tooling, including common design patterns and best practices
• Proficiency with SQL and relational databases
• Experience with Git, pull requests, branching strategies, and code reviews
• Experience with typical testing frameworks — unit testing, mock objects
• Experience with build pipeline and dependency management
• Ability to diagnose issues using debugging, logging, monitoring, and performance-analysis tools
• Ability to work independently on assigned projects and contribute to technical decisions

Preferred Qualifications:

• An active or recent DHS or CBP background investigation — strongly preferred
• Prior experience supporting a federal software development program
• RESTful API design and system integration experience in a multi-vendor environment
• Experience in an Agile/Scrum delivery team

Salary: $125,000 – $135,000 based on experience
Job location: Hybrid — Northern Virginia

Company Benefits:

• Medical/dental/vision insurance
• 401(k) plan: 4% matching, immediate vesting, no restrictions
• Long- and short-term Disability coverage
• Company-sponsored Life Insurance coverage