Senior Fullstack Software Engineer Jobs in San Antonio, TX

Job Title: Full Stack Web Developer

Job Category: Engineering

Time Type: Full time

Minimum Clearance Required to Start: Secret

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Continental US

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The Opportunity:

Join our team to support and enhance our existing internal web applications while contributing to new tool development for the Air Force in San Antonio, TX.

Apply your full stack expertise to optimize and extend our established web application ecosystem.

Collaborate in a tech-focused environment that values practical solutions and continuous improvement

Grow your career and make a direct impact on company operations by building tools that enhance productivity and efficiency for internal teams

Responsibilities:

• Maintain and improve our existing internal web applications built with React.js and TypeScript

• Develop new features and tools to support company operations and team workflows

• Build and enhance backend APIs using Flask (Python) and NestJS (TypeScript)

• Write clean, maintainable, and efficient code following best practices

• Collaborate with internal stakeholders to understand requirements and implement effective solutions

• Implement responsive and accessible user interfaces with modern HTML5 and CSS3

• Work with PostgreSQL databases and Redis caching to ensure optimal application performance

• Identify opportunities for application improvements and technical debt reduction

• Participate in code reviews and contribute to documentation

• Troubleshoot and resolve issues affecting internal tools and applications

Qualifications:

Required:

• B.S. in Computer Science, Software Engineering, Computer Engineering or related field

• 3 or more years of professional experience in web development

• Demonstrated proficiency with React.js using TypeScript

• Experience building backend APIs with Flask (Python) and NestJS (TypeScript)

• Demonstrated proficiency in Python, HTML5, CSS3, TypeScript, and JavaScript

• Experience with PostgreSQL database design, optimization, and querying

• Proficiency with Redis for caching and real-time features

• Experience with Git version control and collaborative development workflows

• Willing and able to obtain a DoD Secret clearance (U.S. Citizenship required)

• Willing to work onsite in San Antonio, TX

Desired:

• Air Force, Military or Defense Contracting experience

• Experience with Agentic Workflows (Agents, n8n pipelines)

• Experience with AWS services or AWS certification

• Experience with GitLab CI/CD pipelines and DevOps workflows

• Knowledge of Docker containerization for internal tool deployment

• Familiarity with WebSockets for real-time applications

• Experience with ORM libraries such as SQLAlchemy and Prisma

• Knowledge of the Tailwind CSS framework

• Experience with Tanstack Tools (Router, Query, Forms)

• Knowledge of Rust programming language

• Strong problem-solving skills with the ability to troubleshoot existing codebases

• Excellent communication skills to work effectively with internal teams

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.

The proposed salary range for this position is:

$65,700 - $134,400