Everforth ECS is seeking a highly skilled Senior Full Stack Engineer with extensive experience in designing, building and maintaining large scale API's for enterprise level applications in support of the Department of Homeland Security. Tools necessary for excelling in this role include Java (with Maven, Gradle, etc), JavaScript Frontend frameworks (React, Angular, etc), Elastic and other data sources, and DevSecOps in the Cloud.
This role will focus heavily on modernizing legacy systems with deprecated code bases, requiring both technical expertise and creative problem-solving abilities. You will play a critical role in rearchitecting our application's API infrastructure, ensuring scalability, reliability and long-term maintainability.
Key Responsibilities:
- Support the design and architecture of robust, scalable API's for large enterprise level applications.
- Integrate and operate CI/CD pipelines used for building and releasing code and container images.
- Assess and refactor deprecated code bases implementing best practices for modernization and performance improvement.
- Collaborate with engineers to integrate React-based user interfaces with scalable APIs, leveraging React expertise to enhance API interactions, support legacy system modernization, and ensure seamless functionality and optimal user experience.
- Provide solutions for legacy system migration while minimizing system downtime and operational risks.
- Identify and resolve technical debt in older systems while transitioning them to modern Java frameworks and tools.
- Must have US citizenship.
- Ability to pass a Public Trust investigation.
- Bachelor's degree in a related field.
- Minimum 15 years of general work experience.
- 8+ years with Java (8 and beyond) with strong experience in legacy system modernization.
- 5+ years developing responsive web apps using React, Redux, and modern JavaScript.
- Strong background in API development, including 5+ years building RESTful microservices and service-oriented architectures.
- 3+ years of experience with CI/CD pipelines and deploying/operating in AWS or Azure Cloud environments.
- 3+ years of experience with Springboot or other stateless Java frameworks.
- 3+ years developing applications in a production setting and troubleshooting complex issues within legacy environments and proposing effective solutions.
- 3+ years experience with Python.
- Solid understanding of Git, version control workflows, and collaborative development practices.
- Familiarity with CX and UI/UX principles and their application in modern software design.
- Excellent communication skills with the ability to explain technical challenges and solutions to non-technical stakeholders.
Skills Required
- Bachelor's degree in a related field
- 15 years of general work experience
- 8+ years with Java (8 and beyond)
- 5+ years developing responsive web apps using React, Redux, and modern JavaScript
- 5+ years building RESTful microservices
- 3+ years experience with CI/CD pipelines
- 3+ years of experience with Springboot or other stateless Java frameworks
- 3+ years developing applications in a production setting
- 3+ years experience with Python
- Solid understanding of Git
- Must have US citizenship
- Ability to pass a Public Trust investigation
ECS Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about ECS and has not been reviewed or approved by ECS.
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Healthcare Strength — ECS advertises multiple national-network medical plan options with HSA eligibility alongside dental and vision coverage. Coverage generally begins quickly and is paired with company-paid short- and long-term disability, adding stability to the health package.
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Retirement Support — A 401(k) with Safe Harbor and immediate vesting on employer contributions is emphasized, with an employer match available. Access to an employee stock purchase plan via the parent company provides an additional savings avenue.
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Parental & Family Support — Paid parental leave up to 30 days, adoption assistance, and other family-oriented leaves are highlighted. Feedback suggests these offerings add meaningful value beyond base pay for many roles.
ECS Insights
What We Do
ECS, a segment of ASGN (NYSE: ASGN), delivers advanced solutions and services in cloud, cybersecurity, artificial intelligence (AI), machine learning (ML), application and IT modernization, and science and engineering. The company solves critical, complex challenges for customers across the U.S. public sector, defense, intelligence and commercial industries. ECS maintains partnerships with leading cloud, cybersecurity, and AI/ML providers and holds specialized certifications in their technologies. Headquartered in Fairfax, Virginia, ECS has more than 3,400 employees throughout the U.S. and has been recognized as a Top Workplace by The Washington Post for the last five years.






