Senior Software Developer

ECS; O'Fallon (IL); On-site; USD 110,000 - 120,000; Full time

Job summary

Everforth ECS is seeking a Senior Software Developer to work in our O'Fallon, IL office. You will develop web applications using Java/HTML5/Angular, collaborate with a wide team, and help deliver DevSecOps pipelines for CI/CD and security in the DoD context.

The role includes integrating solutions with DevSecOps practices, supporting modernization of a legacy system, and working in a cloud-hosted environment with strong emphasis on quality and security.

Qualifications

• Bachelor's degree in a related field is required.
• Proficient with Java, HTML5, Angular, Spring; strong web apps experience.
• Experience with DevSecOps pipelines and cloud hosting.
• Secret clearance or ability to obtain immediately.

Responsibilities

• Deliver DevSecOps pipelines and POCs for CI/CD/CT/CS/CM.
• Collaborate with devs and sysadmins to integrate solutions.
• Support a legacy system modernization hosted in the cloud.
• Ensure architecture aligns with DoD requirements and security.

Skills

Java

HTML5

Angular

Spring

RHEL

SQL

Oracle RDBMS

JavaScript

XML

Agile methodologies

WebLogic

Tomcat

Gradle/Maven/Ant

Python

DevSecOps pipeline

Secret Clearance

Security+ Certification

Education

Bachelor's Degree

Tools

Git

Jenkins

Docker

Kubernetes

Gradle

Artifactory

Terraform

Job description

Job Description

Everforth ECS is seeking a Senior Software Developer to work in our O'Fallon, IL office.

ECS Federal LLC is looking for a Senior Software Developer who possesses and applies expertise on multiple complex work assignments. The ECS Team provides development and support of GATES, a mission‑critical application providing cargo and passenger manifesting and in transit visibility requirements for the DoD. We are seeking a Java Developer with experience developing Web applications to be part of the larger team. Assignments may be broad in nature, requiring originality and innovation in determining how to accomplish tasks. Operates with appreciable latitude in developing methodology and presenting solutions to problems. Contributes to deliverables and performance metrics. As a Senior Software Developer, the selected individual will work hands‑on with developer and systems administrators to integrate our solutions and products for our government customer. Key responsibilities are to deliver DevSecOps pipeline solutions and proof of concepts for Continuous Integration/Configuration, Continuous Development, Continuous Delivery/Deployment, Continuous Testing, Continuous Security and Continuous Monitoring. The DevSecOps Engineer is also responsible for driving solutions that meet the customers' technical, financial and business requirements, and supporting a legacy system in the process of being modernized while being hosted in the cloud utilizing DevSecOps processes.

Salary Range: $110,000 - $120,000

Required Skills

• Bachelor's Degree
• Java, HTML5 technologies, Angular, Spring, RHEL, SQL, Oracle RDBMS, JavaScript, XML, Agile methodologies, WebLogic, Tomcat, Gradle/Maven/Ant, Python
• Experience with DevSecOps pipeline
• Secret Clearance
• Security + Certification or the ability to obtain immediately following employment.

Desired Skills

• Knowledge of DoD transportation data and business practices
• Ability to Design, Code and Test requirements using:

Design technologies

• Linux and Windows operating systems
• Server technologies like WebLogic, Tomcat and Apache
• Container technologies like Docker, Kubernetes

• Version control systems like Git
• Build and deployment orchestration tools like Jenkins and K8s
• Build and package managers like Gradle and Artifactory
• Scripting languages such as Python, BASH, Perl, Powershell
• Configuration Management tools like Ansible, Puppet, Chef, Terraform
• Testing tools/frameworks like Junit, Selenium, Cucumber or Cypress
• Static code analysis tools like SonarQube and Fortify
• Log analytics tools like Splunk
• Experience writing with Angular or React JS
• Experience writing Java, JavaScript, and SQL or PL/SQL
• Experience developing Infrastructure as Code (IaC) and Configuration as Code (CaC)
• Familiar with Agile development methodology with an understanding of Kanban, SCRUM and SaFe principle, and DevOps/DevSecOps processes and methods
• Support troubleshooting and diagnostics in both the development and production environments
• Strong understanding of test‑driven development and test automation to ensure adequate test coverage (unit, integration, system, load, functional and exploratory)
• Able to work with the development manager and lead architect on architecture changes and understanding process and application design including grooming requirements in the architecture that were not provided in detail or not fully defined
• Ability to manage workloads and the creation of program specifications from which the developers work and add them to the work tracker adding flowcharts, class diagrams, Entity Relationship Diagrams (ERDs), and a variety of other visual techniques (mockups) to clearly convey the meaning to the developer.
• Able to work with development manager to manage backlogs, estimates and other SDLC requirements for development, provide estimates on requirements for iteration/build planning, and Integrate and deploy software in a complex architecture
• Able to review code, perform code reviews and code check‑ins to ensure the integrity of commits, builds, etc.
• Ability to learn, understand and refine the capabilities of other developers on the team including ability to mentor and coach intermediate and junior developers with constructive code reviews and code theory discussions
• Good oral and written communications skills to report progress, challenges, blockers, and risks that require escalation to the development manager

ECS Federal LLC is an equal opportunity employer and does not discriminate or allow discrimination on the basis any characteristic protected by law. All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, or local jurisdiction law.

Everforth ECS

Everforth ECS is the federal segment of Everforth, a $4B global organization with over 10,000 employees. Our nearly 3,500 professionals deliver advanced technology solutions in data and AI, cybersecurity, and enterprise transformation, serving defense, intelligence, and federal civilian agencies.

Our work powers mission‑critical outcomes, strengthens technology partnerships, and creates meaningful opportunities for our people. We are defined by a commitment to excellence in delivery, a culture of innovation, and an environment where talent can thrive and grow.

We Value

• Attracting and developing top talent and high‑performing teams
• Fostering a culture that is engaging, accountable, and mission-driven

Meet the challenge. Make a difference with Everforth ECS!

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