Full Stack Software Engineer at CACI in Philadelphia, PA

Full Stack Software Engineer Location: US CO Aurora Job Title: Full Stack Software Engineer Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Local Anticipated Posting End: 6/26/2026 The Opportunity: We are seeking a talented and motivated Software Engineer to join our dynamic team. As a key contributor, you will design, develop, and maintain innovative software solutions that meet modern industry standards. You will be responsible for writing clean, scalable code, troubleshooting technical issues, and optimizing system performance. A strong understanding of cloud computing, APIs, and software architecture is highly desirable. If you are passionate about technology and eager to make an impact, we would love to hear from you! Responsibilities: Modernize Architecture: Design and deploy scalable microservices, moving away from monolithic structures toward event-driven, serverless solutions. Full-Stack Development: Build modern user interfaces using React and develop high-performance services using Python with FastAPI or Flask. Data Lake Management: Architect solutions for the collection, governance, and processing of Very Large Data Sets (VLDS) within a modern data lake environment. CI/CD Leadership: Implement and manage robust automated pipelines using GitLab CI/CD (or Jenkins) to ensure seamless delivery and high code quality. Testing Excellence: Maintain high reliability through comprehensive unit (pytest/Jest), system, and integration testing. Qualifications: Required: Bachelor’s degree in computer science or related field 5+ years of experience in object-oriented (OO) languages, with expertise in Python Must possess an active TS/SCI security clearance with Polygraph Full-Stack & Backend Development UI: Extensive experience with React for building responsive, modern front-end applications. Service Development: Mandatory expertise in Python. Frameworks: Hands-on experience with lightweight frameworks such as FastAPI or Flask. Architecture: Proven track record in Microservices and modern design patterns. AWS Cloud & Serverless (Primary Focus) Compute: Expert-level knowledge of AWS Lambda and Step Functions. API Management: Practical experience with Amazon API Gateway. Storage & Search: Proficiency with S3, DynamoDB, and OpenSearch. Note: Experience with ECS/EC2 is beneficial, but the priority is serverless architecture. Data Storage & Management Relational: Deep proficiency with PostgreSQL. NoSQL: Experience with MongoDB. Cloud Storage: Broad understanding of AWS or Azure storage ecosystems. Build Tools & DevOps CI/CD: Strong experience with GitLab CI/CD (preferred) or Jenkins. Build Ecosystem: Proficiency with NPM (front-end), Maven, and Gradle (backend/dependency management). Desired: Experience in DevSecOps environments. Familiarity with cloud-native security best practices within a cleared environment. Experience handling VLDS (Very Large Data Sets) in a production setting. IAT Level II or III certification (i.e. 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. Additional Locations: US PA Philadelphia