Assistant Software Engineer Jobs in Missouri (NOW HIRING)

Job Title: 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: Continental US Anticipated Posting End: 9/30/2026 The Opportunity: Join a fast-paced Agile team developing mission-critical geospatial intelligence (GEOINT) applications supporting the National Geospatial-Intelligence Agency (NGA). Contribute to the design, development, and deployment of modern web-based software solutions that enable intelligence analysis and mission execution. Work with advanced GIS technologies, cloud-native architectures, and large-scale data environments supporting national security missions.

Collaborate with software engineers, system architects, and mission stakeholders to deliver innovative capabilities to end users. Help design and implement secure, high-quality software solutions that directly support critical intelligence operations. Responsibilities: Develop, test, and maintain software applications using Java and/or Python.

Design and implement web application features using modern development frameworks and best practices. Integrate and manage structured and unstructured data using relational and non-relational database technologies. Support the development and enhancement of geospatial and GIS-enabled applications and services.

Participate in code reviews, unit testing, debugging, and software integration activities. Collaborate with cross-functional Agile teams to deliver capabilities within scheduled sprint cycles. Apply secure coding practices and support security-focused software development processes.

Assist with troubleshooting, performance tuning, and continuous improvement of existing applications. Contribute to technical documentation, system design discussions, and software lifecycle activities. Mentor junior developers and provide technical guidance within the development team as needed.

Qualifications: Required: Bachelor's degree in Computer Science, Software Engineering, Information Systems, or a related technical discipline. 5+ years of professional software development experience. Demonstrated experience developing and maintaining software applications using Java, Python, or both.

Experience designing and implementing web-based applications and services using modern development frameworks. Experience working with relational and/or NoSQL databases, including data modeling, querying, and performance optimization. Understanding of software architecture, design patterns, and object-oriented programming principles.

Experience working within Agile software development environments and participating in all phases of the software development lifecycle. Knowledge of secure software development practices and experience implementing security requirements within software solutions. Strong analytical, troubleshooting, and problem-solving skills with the ability to work independently and collaboratively.

TS/SCI security clearance with willingness to undergo polygraph examination. Desired: Experience developing geospatial or GIS-enabled applications using technologies such as ArcGIS, GeoServer, OpenLayers, Leaflet, Cesium, or similar platforms. Experience supporting intelligence, defense, or other federal government customers, particularly within classified environments.

Familiarity with cloud-native architectures, containerization technologies (Docker, Kubernetes), CI/CD pipelines, and DevSecOps practices. - 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.