C# Developer

CACI International Inc; San Antonio (TX); On-site; USD 65,700 - 134,400; Full time

Benefits offered by this job

Flexible time off

Comprehensive benefits

Learning and development opportunities

Job summary

CACI International Inc in San Antonio, TX is seeking a C# Developer to join our defense engineering team. In this role, you will work on Automated Test Equipment development for aerospace and defense systems. Responsibilities include developing libraries to control test instruments and converting existing libraries to C#.

The ideal candidate will have a B.S. in a related field, at least 3 years of C# programming experience, and a strong understanding of the .NET Framework. This position requires the ability to work onsite in San Antonio and secure a DoD Secret clearance.

Qualifications

• 3+ years of professional C# programming experience.
• Strong understanding of C# fundamentals.
• Experience with modern .NET versions.

Responsibilities

• Develop libraries to control test instruments using C# .NET.
• Convert libraries written in C to C#.
• Verify C# library functionality in a laboratory.

Skills

C# programming

.NET Framework / .NET Core

Problem-solving skills

Attention to detail

JSON file formats

Education

B.S. in Computer Science or related field

Tools

Git version control

National Instruments hardware/software

Job description

Job Title: C# 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.

Bring your C# software development skills to our defense engineering team to support a critical Automated Test Equipment (ATE) development for Air Force aerospace and defense systems in San Antonio, TX. Work hands‑on with hardware and software to create libraries that will control and automate test and measurement devices. Grow your career in defense contracting while directly supporting aircraft sustainment programs through software development.

Responsibilities

• Develop libraries to control test instruments (Digital Multimeters, DAQ systems, Matrix switches) using C# .NET 10
• Convert libraries written in C to C#
• Implement methods in C# that perform measurements (voltage, current, resistance, digital patterns) for avionics systems
• Read manufacturer programmer manuals to implement instrument library functions
• Verify C# library functionality in a laboratory environment

Qualifications

• B.S. in Computer Science, Software Engineering, Computer Engineering, Electrical Engineering or related field
• 3 or more years of professional C# programming experience
• 3 or more years of experience with .NET Framework / .NET Core (experience with modern .NET versions)
• Strong understanding of C# fundamentals (classes, methods, attributes, JSON serialization)
• Experience working with JSON file formats
• Demonstrated problem‑solving and debugging skills
• Strong attention to detail and commitment to code quality
• 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
• Basic electronics knowledge (voltage, current, resistance, digital I/O concepts)
• Ability to read and interpret technical documentation and test requirements
• Background in electronics testing or test engineering
• Familiarity with test & measurement instruments (DMMs, oscilloscopes, DAQs, etc.)
• Experience with National Instruments hardware or software
• Familiarity with Git version control
• Experience with C development

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

CAI 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.