Senior Full Stack Java Developer

Synergy ECP; Washington (District of Columbia); On-site; USD 125,000 - 155,000; Full time

Benefits offered by this job

Comprehensive Health Benefits

401K Retirement plan

Generous paid time off

Flexible work options

Job summary

Synergy ECP is seeking a Senior Java Full Stack Developer in Washington, D.C. to join an agile software development team. The role includes full-stack development using Java and React, implementation of backend APIs, and working with PostgreSQL databases.

The ideal candidate should have over 7 years of experience and possess an active TS/SCI clearance. A competitive compensation package including health benefits and work-life balance will be offered.

Qualifications

• Minimum of 7+ years of experience.
• Demonstrated experience delivering large-scale enterprise applications.
• Strong verbal and written communication skills.

Responsibilities

• Provide full-stack design and development support using Java and React.
• Develop and maintain secure RESTful APIs for data access.
• Plan and execute application deployments and manage version control.

Skills

Java

Spring Framework/Security 6+

Spring Boot 3+

PostgreSQL

React

RESTful APIs

Agile methodologies

Git/GitLab

CI/CD tools

AWS

Education

Bachelor’s or Master's degree in Computer Science

Tools

Maven

Kubernetes

Docker

Atlassian tools (Jira, Confluence)

Job description

NetServices (NSI) is an IT services firm with a long-standing reputation for delivering high-quality, cost-effective solutions to drive lasting results. Now operating as a subsidiary of Synergy ECP, NSI continues to stand out in a crowded contracting landscape through its agility, strong customer focus, and commitment to retaining exceptional talent. By taking on challenging IT initiatives, we cultivate our talent and are continually evolving through our partnerships with clients. Our close‑knot team of highly cleared engineers, analysts, and program managers represent some of the best talent locally available.

The Senior Java Full Stack Developer will be a part of an agile software development team and integral in performing software development, O&M support, and adhere to agile methodology and scrum ceremonies. This role will design and implement backed APIs using Java and Spring Boot, design and build secure and responsive UIs using React, and develop optimized PostgreSQL schemas and queries. The ideal candidate will have demonstrated strong verbal and written skills, experiences with the technology and business tools listed below, and will have proven experience delivering large‑scale enterprise applications from concept through deployment.

Position Description

• Provide full‑stack design and development support using Java, Spring MVC, Spring Security, Spring Boot, React, and PostgreSQL.
• Design and implement modern UI components using React, TypeScript/JavaScript, and reusable design patterns.
• Implement normalized PostgreSQL schemas and entity relationships supporting system scalability.
• Develop and maintain secure RESTful APIs for data access and integration.
• Support and document data migration efforts, ensuring integrity and consistency between legacy and new systems.
• Plan and execute application deployments, version control, and CI/CD pipelines.
• Assist in supporting all aspects of the project to include all phases of life cycle development.
• Ensure compliance with 508 accessibility, enterprise security practices, and other practices as needed.

Skills and Experience to Support NG Team

• Strong UI design and development skills using React, JavaScript, and CSS.
• Strong development experience required in the following technologies/areas: Java, Spring Framework/Security 6+, Spring Boot 3+, Hibernate 6+, SQL/PLSQL, PostgreSQL, RESTful APIs, Maven build tool, and Git/GitLab.
• Experience with database design and data migration.
• Additional experience required in the following technologies/areas: AWS (S3, EC2, ECS, Aurora, CloudWatch), Keycloak, Kubernetes, Maven, and Docker.
• Experience with Agile and Scrum and Kanban frameworks/methodologies.
• Experience with Atlassian tools to include Jira and Confluence.
• Experience with Continuous Integration/Continuous Delivery (CI/CD) tools and automation.
• Exceptional analytical and conceptual thinking skills.
• Excellent documentation skills.
• Excellent planning, organizational, and time management skills.
• Self‑motivated with strong initiative to help team grow.

Minimum of 7+ years of experience.

Computer Science background with degree (Bachelor’s or Master's) in field.

Security Clearance requirement

Must possess active TS/SCI clearance to be considered for this role.

Other Requirements

U.S. Citizenship.

Compensation Spotlight

For this role, our typical salary range starts at $125,000 and stretches up to $155,000. We are committed to rewarding exceptional talent and will consider offers above this range for candidates with the right education, experience, and additional attributes. Compensation is part of a complete rewards package including culture and impact opportunities.

Taking Care of the People Who Take Care of The Nation

Compensation

We offer highly competitive compensation that is consistently recognized by our employees as being generous.

Health & Retirement

We offer a comprehensive Health Benefits package and 401K Retirement plan. Additional health-related benefits include People Partners to help navigate personal and professional worlds, and strong wellness resources offered through our healthcare provider.

Education

Individual growth is a priority at NSI/Synergy ECP. Employees are encouraged to take advantage of our company-sponsored continuing education program so they can pursue degrees or certifications.

Work/Life Balance

A healthy work/life balance is essential for building and executing your work effectively. We offer generous paid time off, 10 paid holidays a year, and flexible work options.

Philanthropy

We participate annually in building awareness, volunteering, and contributing to various organizations, creating a sense of purpose and engagement.

NSI/Synergy ECP is committed to providing equal employment opportunities to all qualified individuals. Employment decisions are based on merit, qualifications, and business needs. We do not discriminate on the basis of race, color, sex, national origin, religion, age, disability, or any other status protected by applicable law.