Senior Software Engineer

CACI; United States; On-site; USD 140,000 - 180,000; Full time

Job summary

CACI is seeking a Senior Software Engineer to join a team building DoW PPBE applications and modernizing financial and planning systems. You will own end-to-end architecture, from full-stack development to AI-enabled features, in both unclassified and classified environments.

You will design, implement, and review software across React, TypeScript, NodeJS, Python, and .NET, mentor peers, and ensure secure, reliable integrations within CI/CD workflows.

Qualifications

• Active Secret or Top Secret clearance.
• Security+ certification.
• Bachelor’s degree in CS, Data Science, Math, or related STEM.
• 10+ years of professional software development across the full SDLC.
• Federal-sector software delivery experience (DoD/DoW or similar).
• Experience with Python and JavaScript/TypeScript, plus React/NodeJS/.NET.
• Experience with RESTful APIs, Git, and CI/CD pipelines.
• Containerization (Docker, Kubernetes) and cloud (AWS/Azure/GCP).

Responsibilities

• Design, build, and maintain full-stack applications with React, TypeScript, NodeJS, Python, and .NET.
• Lead by example in sound software design, testing, code review, and ownership.
• Mentor and support junior developers through code reviews and pairing.
• Integrate AI-enabled features including LLM APIs and RAG pipelines.
• Architect reliable API integrations with strong error handling.
• Troubleshoot and resolve system defects.
• Address security vulnerabilities and DoW cybersecurity standards.
• Participate in CI/CD pipelines and collaborative development workflows.
• Document technical implementations and stay current with tech developments.

Skills

Full SDLC experience

Mentoring/leadership

Communication skills

RESTful APIs

Git version control

CI/CD pipelines

Education

Bachelor's degree in Computer Science or related STEM

Tools

Python

JavaScript/TypeScript

React

NodeJS

.NET

Docker

Kubernetes

AWS

Azure

GCP

OpenAI/LLM APIs

Job description

Job Title: Senior Software Engineer

Job Category: Engineering

Time Type: Full time

Minimum Clearance Required to Start: Secret

Employee Type: Regular

Percentage of Travel Required: None

Type of Travel: None

The Opportunity:

Join our team as a Senior Software Engineer supporting Department of War (DoW) PPBE (Planning, Programming, Budgeting, and Execution) applications. You'll help build and sustain mission-critical defense financial and planning systems that modernize how the DoW plans, programs, budgets, and executes operations. End-to-end software architecture is yours to own, from traditional full-stack development to integrating agentic AI capabilities such as LLM-enabled features and intelligent document processing, and more. Strong engineering fundamentals and federal-sector experience are essential, because this position helps balance a growing team by setting the standard for design, testing, code review, and ownership. Work is performed in both unclassified and classified environments.

Responsibilities:

• Design, build, and maintain full-stack applications using modern technologies such as React, TypeScript, NodeJS, Python, and .NET
• Lead by example in sound software design, automated testing, code review, and ownership of delivered work
• Mentor and support junior developers through code reviews, pairing, and technical guidance
• Integrate AI-enabled features into production systems, including LLM/GenAI APIs (OpenAI, Anthropic, Bedrock), RAG pipelines, and agentic workflows, alongside the team's established patterns
• Architect reliable API integrations with strong error handling and graceful degradation
• Troubleshoot and resolve system defects
• Address security vulnerabilities and ensure compliance with DoW cybersecurity standards
• Participate in CI/CD pipelines (GitLab) and collaborative development workflows
• Document technical implementations and stay current with relevant technology developments

Qualifications:

Required:

• Active Secret or Top Secret clearance
• Security+ certification
• Bachelor's degree in Computer Science, Data Science, Mathematics, or a related STEM field
• 10+ years of professional software development experience across the full SDLC
• Direct, recent experience delivering software in the federal sector (DoD/DoW or other federal agencies), with an understanding of the constraints of federal environments
• Direct experience with our technology stack: Python and JavaScript/TypeScript, plus React, NodeJS, and/or .NET
• Demonstrated engineering discipline: sound design, testing, code review, and ownership
• Experience with RESTful APIs and system integration
• Proficiency with Git version control and CI/CD pipelines
• Experience with containerization (Docker, Kubernetes) and at least one major cloud platform (AWS, Azure, or GCP)
• Strong written and verbal communication skills

Desired:

• Interest in or exposure to AI-enabled software engineering, including
• LLM APIs, prompt engineering, RAG architectures, agentic patterns, vector databases (Chroma, Weaviate, pgvector), orchestration frameworks (LangGraph, Agno, CrewAI), LLM observability (Phoenix, LangFuse, LangSmith)
• Knowledge of DoD PPBE processes, defense budget formulation (POM, BES, J-Books, FYDP), or DoD financial systems (e.g., NGRMS, GFEBS, DAI, DEAMS)
• Experience with AWS GovCloud, AWS Bedrock, or Azure OpenAI Service
• Working knowledge of Kubernetes, Terraform or other IaC tools
• Familiarity with ATO processes, NIST frameworks, or FedRAMP
• Familiarity with Agile methodologies (Jira)

What You Can Expect:

• A culture of integrity. At CACI, we place character and innovation at the center of everything we do. As a valued team member, you'll be part of a high-performing group dedicated to our customer's missions and driven by a higher purpose - to ensure the safety of our nation.
• An environment of trust. CACI values the unique contributions that every employee brings to our company and our customers - every day. You'll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.
• A focus on continuous growth. Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground - in your career and in our legacy.

Pay Range :

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive