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Software Engineer; E4​/COS

Job in Colorado Springs, El Paso County, Colorado, 80509, USA
Listing for: Apex Systems
Full Time position
Listed on 2026-06-19
Job specializations:
  • Software Development
    Java Developer, Software Engineer, Backend Developer, DevOps
Salary/Wage Range or Industry Benchmark: 80000 - 100000 USD Yearly USD 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Position: Software Engineer (26-148) E4 / COS-83

Job #: 3034615

Location: Colorado Springs, Colorado (Onsite)

Employment Type: Contract

Security Clearance: Candidates must be able to obtain and/or maintain a Department of Defense Secret clearance as a condition and continuation of employment.

Role Overview

This position is for a Software Engineer on a program supporting the development of future missile defense capabilities. The candidate will primarily be responsible for software development using Java. The role requires interaction with other teams, independent work, and flexibility in a dynamic environment. You will provide in-depth analysis and technical support of a large, distributed system.

Key Responsibilities
  • Perform complex problem resolution, design, development, testing, integration, and user-support for a large code baseline.
  • Provide in-depth analysis and technical support of a large, distributed system written in Java.
  • Follow specifications to develop or modify functionality within the code.
  • Assist with design, benchmark testing, debugging, and documentation.
  • Interface with other system support groups to resolve problems, set standards, and improve overall system efficiency.
  • Design, code, test, and implement tools for automation.
  • Work independently or with a small group.
Required Qualifications
  • Education:

    An advanced degree with 5+ years of experience, a bachelor's degree with 3+ years of experience, or equivalent.
  • Experience:

    Must have professional experience with Java development and demonstrated ability to solve complex problems that require ingenuity and creativity.
  • Technical

    Skills:

    Java development experience; knowledge of software development practices and coding standards; strong problem-solving skills, including the ability to review performance issues, identify root causes, and develop solutions.
Preferred Qualifications
  • Security+ certification or equivalent.
  • Active TS clearance is preferred.
  • Experience working as part of an Agile team.
  • Familiarity with Java Spring and containerization tools such as Docker/Kubernetes.
  • Knowledge of server-side development and message passing.
  • Experience developing enterprise applications.
  • Use of common software development tools like git, Nexus, JIRA, Confluence, Maven, or Gradle.
  • Understanding of system engineering design artifacts such as Use Cases and UML diagrams.
  • Experience in command and control system application development.
  • Automated test and pipeline development experience.
  • Experience developing software for Unix/Linux and Windows platforms.
Equal Employment Opportunity

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law.

Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.

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