Senior Full Stack Application Developer

We're looking for an experienced Senior Full Stack Application Developer to support a Contract Management Tool, a mission-critical platform designed to modernize financial planning, execution tracking, and audit readiness for the Department of Defense (DoD). This developer will be responsible for designing, building, and maintaining secure full-stack solutions that support program transparency, fiscal responsibility, and operational agility.

Key Responsibilities:

• Develop and maintain scalable, secure full stack applications using modern frameworks and cloud technologies • Collaborate with UI/UX designers, QA teams, and mission stakeholders to define, develop, and implement financial tool capabilities • Integrate with DoD financial management systems and ensure data compliance with government regulations • Build RESTful APIs and microservices that ensure clean, secure data pipelines • Apply secure coding practices in accordance with DoD STIGs and RMF guidelines • Implement role-based access controls and maintain system integrity through audit-compliant design • Participate in Agile sprint cycles, code reviews, testing, and release processes • Support DevSecOps pipeline integration and CI/CD automation

Must be able to

Required Skills & Experience:

Top Secret Clearance (TS/SCI Preferred or Eligible ) This is a hybrid on-site and remote position.

8+ years of full stack development experience supporting web-based applications

Strong experience with front-end frameworks (React, Angular, or Vue.js)

Back-end expertise with C#, Node.js, .NET Core, Java, or Python

Experience with SQL/PostgreSQL and NoSQL databases

Knowledge of DevSecOps, Git version control, and CI/CD tools (GitLab, Jenkins, etc.)

Working knowledge of cloud platforms (AWS, Azure, or GovCloud)

Strong understanding of application security, RBAC, and API development

Experience working within DoD or federal IT environments

Nice to Have:

Bachelor's or Master's degree in Computer Science, Information Systems, or related field

Familiarity with DoD budgeting processes (e.g., POM, O&M, RDT&E)

Experience developing financial or audit-traceable platforms

Understanding of STIGs, ACAS scanning, RMF documentation, and system hardening

Prior work on software tools used for budget forecasting, contract execution, or manpower allocation

At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting: February 17, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range: Pay Range $107,900.00 - $195,050.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.