Senior Backend Software Engineer

Job Title: Senior Backend Software Engineer Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: TS/SCI Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Continental US Anticipated Posting End: 8/31/2026 The Opportunity: CACI is seeking a talented and motivated Backend/Services Software Engineer to join our dynamic development team. This role is ideal for a mid-career developer who is passionate about building scalable, reliable, and high-performance cloud services. You will be responsible for designing, developing, and implementing modern Java and Python microservices that run within a modern orchestration and cloud environment (such as AWS). If you are eager to learn, enthusiastic about problem-solving, and ready to make a significant impact on our core product architecture, we would love to hear from you! Responsibilities: As a Senior Software Engineer, your responsibilities include: • Writing, building, deploying, and maintaining diverse software applications • Overseeing and guiding the requirements analysis, writing, building, and deployment of software • Overseeing automated testing and providing feedback to management during the development process • Modifying and testing changes to previously developed programs • Collaborating effectively within a software engineering team Qualifications: Required: • At least 5 years of professional software development experience and working proficiency in Python and/or Java • Experience with lightweight frameworks such as FastAPI, Flask, Quarkus, or Spring Boot • Proficiency with software packaging tools (uv, pip, Maven, etc.) • Comprehensive testing experience, including unit tests (e.g., pytest, JUnit), system tests, and integration tests • Proficiency with various data storage solutions (PostgreSQL, MongoDB, AWS or Azure cloud storage services) • Experience with source control tools (e.g., Git, GitLab) • Experience implementing and managing CI/CD pipelines using tools such as GitLab CI/CD or Jenkins • Experience containerizing and deploying applications using Docker and Kubernetes • Ability to work in office full time • Bachelor's degree in computer science or related field • Active TS/SCI U.S. Government Security Clearance Desired: • Strong knowledge of GEOINT (Geospatial Intelligence) data collection and distribution paradigms, including overhead intelligence • Experience developing Agentic AI solutions using open-source frameworks (e.g., DSPy, Microsoft AutoGen, LangGraph, CrewAI) • In-depth knowledge of and practical experience with standard AWS managed services (S3, ECS, EC2, Lambda, Step Functions, DynamoDB, OpenSearch) • Experience with ArgoCD or GitOps deployment workflows • Experience with Government Clouds (e.g., GovCloud, C2S) • Experience with DevSecOps and Agile Scrum software development methodology, including tools like Jira and Confluence • IAT Level II or III certification (e.g., Security+, CISSP, or CASP) - 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 benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits. Since this position can be worked in more than one location, the range shown is the national average for the position. The proposed salary range for this position is: $82,100-$172,400 CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic. Click on Search Jobs to find and apply to CACI openings.