CACI International Inc Software Engineer Interview Questions + Guide in 2025

CACI International Inc is a leading provider of information solutions and services in support of national security missions and government transformation.

As a Software Engineer at CACI, you will play a critical role in developing and maintaining software solutions within a fast-paced, mission-oriented environment. You will be responsible for designing and implementing robust web applications, collaborating with cross-functional teams, and leveraging advanced technologies to solve complex problems. Key responsibilities include understanding system architectures, developing user interfaces, and creating effective data visualizations that enhance operational understanding for customers in the Intelligence Community. You will also be expected to communicate effectively with team members and stakeholders to gather requirements and provide training, fostering a collaborative environment that aligns with CACI's commitment to integrity and innovation.

To excel in this role, candidates should possess strong programming skills, particularly in languages such as Java, Python, and JavaScript, along with a solid understanding of web technologies, RESTful interfaces, and scripting. Familiarity with Linux, version control systems, and Agile methodologies is essential. A proactive attitude, excellent problem-solving abilities, and the capacity to work independently as well as part of a team will greatly enhance your fit for this position.

This guide will help you prepare for your interview by providing insights into the key skills and experiences that CACI values in a Software Engineer, along with potential questions you may encounter during the process.

The interview process for a Software Engineer at CACI International Inc is structured to assess both technical skills and cultural fit within the organization. Candidates can expect a multi-step process that includes several rounds of interviews and assessments.

1. Initial Phone Screen

The process typically begins with an initial phone screen, which lasts about 30 to 60 minutes. This call is usually conducted by a recruiter or a technical director and focuses on getting to know the candidate better. Expect to discuss your background, motivations for applying, and basic technical knowledge. This is also an opportunity for you to ask questions about the role and the company culture.

2. Technical Assessment

Following the initial screen, candidates may be required to complete a technical assessment. This could be a take-home coding assignment or an online coding test that must be completed within a specified timeframe. The assessment is designed to evaluate your coding skills, problem-solving abilities, and understanding of relevant technologies. The topics covered often align with the job description, including programming languages, algorithms, and system design.

3. In-Depth Technical Interview

After successfully completing the technical assessment, candidates typically move on to a more in-depth technical interview. This may be conducted over the phone or via video conferencing and usually lasts about an hour. During this interview, you can expect a mix of behavioral and technical questions. Interviewers will delve into your past experiences, your approach to debugging, and your familiarity with software development methodologies. Be prepared to discuss specific projects you've worked on and the technologies you've used.

4. Onsite Interview

Candidates who perform well in the previous rounds may be invited for an onsite interview, which can last several hours. This interview often consists of multiple rounds with different team members, including software engineers and project managers. Each round may focus on different aspects, such as coding challenges, system design, and behavioral questions. You may also be asked to participate in a whiteboarding session to demonstrate your thought process and problem-solving skills in real-time.

5. Final Interview and Offer

The final step in the process may involve a wrap-up interview with higher management or team leads. This is typically a more informal discussion where you can ask questions about the team dynamics, company culture, and future projects. If all goes well, candidates can expect to receive a job offer shortly after this final interview.

As you prepare for your interview, consider the types of questions that may be asked during each stage of the process.

Here are some tips to help you excel in your interview.

Understand the Interview Process

CACI's interview process typically involves multiple stages, including phone screenings, coding assignments, and in-person interviews. Familiarize yourself with this structure and prepare accordingly. Expect a friendly yet thorough approach, where interviewers will assess both your technical skills and cultural fit. Be ready to discuss your resume in detail and articulate your past experiences clearly.

Prepare for Technical Assessments

As a Software Engineer, you will likely face coding challenges and technical questions. Brush up on your programming skills, particularly in languages relevant to the role, such as Java, Python, and JavaScript. Practice coding problems that reflect real-world scenarios, and be prepared to explain your thought process during the coding assessments. Familiarity with RESTful APIs, web technologies, and database management will also be beneficial.

Emphasize Team Collaboration

CACI values teamwork and collaboration. Be prepared to discuss your experiences working in teams, how you handle conflicts, and your approach to problem-solving in a group setting. Highlight instances where you contributed to team success and how you supported your colleagues. This will demonstrate your alignment with CACI's culture of trust and collaboration.

Showcase Your Passion for the Mission

CACI is mission-oriented, focusing on national security and defense. Express your enthusiasm for contributing to projects that have a meaningful impact. Share any relevant experiences or projects that align with CACI's objectives, and articulate how your skills can help advance their mission. This will resonate well with interviewers who are looking for candidates who are not only technically proficient but also passionate about their work.

Ask Insightful Questions

At the end of your interviews, take the opportunity to ask thoughtful questions about the team dynamics, project goals, and company culture. This shows your genuine interest in the role and helps you assess if CACI is the right fit for you. Inquire about the technologies the team is currently using, the challenges they face, and how they measure success in their projects.

Be Yourself

While it's important to prepare, don't forget to be authentic during your interviews. CACI values character and integrity, so let your personality shine through. Share your unique experiences and perspectives, and don't hesitate to discuss your interests outside of work. This can help you connect with your interviewers on a personal level and leave a lasting impression.

By following these tips, you'll be well-prepared to navigate the interview process at CACI and demonstrate that you are the right fit for the Software Engineer role. Good luck!

In this section, we’ll review the various interview questions that might be asked during a Software Engineer interview at CACI International Inc. The interview process will likely assess both technical skills and behavioral competencies, focusing on your ability to work in a team, solve problems, and communicate effectively. Be prepared to discuss your past experiences, technical knowledge, and how you approach software development challenges.

Behavioral Questions

1. Describe a time you had a conflict and how you resolved it.

This question aims to assess your conflict resolution skills and ability to work collaboratively.

How to Answer

Focus on a specific instance where you faced a conflict, detailing the situation, your approach to resolving it, and the outcome. Highlight your communication skills and willingness to find common ground.

Example

“In a previous project, I disagreed with a teammate about the best approach to implement a feature. I suggested we both present our ideas to the team and gather feedback. This not only resolved our conflict but also led to a better solution that incorporated elements from both our proposals.”

2. How do you handle someone in the office who is difficult to deal with?

This question evaluates your interpersonal skills and ability to maintain a positive work environment.

How to Answer

Discuss your approach to understanding the other person's perspective and finding a constructive way to communicate. Emphasize the importance of professionalism and collaboration.

Example

“I believe in addressing issues directly but respectfully. I would first try to understand their viewpoint and then express my concerns. If necessary, I would involve a manager to mediate the discussion, ensuring we maintain a professional relationship.”

3. What is your weakness and how do you handle it?

This question is designed to gauge your self-awareness and commitment to personal growth.

How to Answer

Choose a genuine weakness and explain how you are actively working to improve it. This shows your willingness to learn and adapt.

Example

“I tend to be overly detail-oriented, which can slow down my progress. I’ve been working on setting clearer deadlines for myself and prioritizing tasks to ensure I stay on track without sacrificing quality.”

4. How well do you work in a team?

This question assesses your teamwork and collaboration skills.

How to Answer

Provide examples of successful team projects and your role in them. Highlight your ability to communicate and support your teammates.

Example

“I thrive in team environments. In my last project, I coordinated with designers and product managers to ensure our development aligned with user needs. Regular check-ins helped us stay on track and fostered a collaborative atmosphere.”

Technical Questions

1. Please describe your debugging process.

This question tests your problem-solving skills and technical knowledge.

How to Answer

Outline your systematic approach to debugging, including identifying the issue, isolating the cause, and testing potential solutions.

Example

“My debugging process starts with replicating the issue to understand its context. I then review the code and logs to identify potential causes. After isolating the problem, I implement a fix and test thoroughly to ensure the issue is resolved without introducing new bugs.”

2. Explain how a request for a web page from a web browser is fulfilled.

This question evaluates your understanding of web technologies and protocols.

How to Answer

Describe the steps involved in the request-response cycle, including DNS resolution, HTTP requests, and server responses.

Example

“When a browser requests a web page, it first resolves the domain name to an IP address via DNS. It then sends an HTTP request to the server hosting the page. The server processes the request and sends back an HTTP response, which the browser renders as a web page.”

3. Describe your process when working on a new feature.

This question assesses your software development methodology.

How to Answer

Discuss your approach to feature development, including requirements gathering, design, implementation, testing, and deployment.

Example

“I start by gathering requirements from stakeholders to understand the feature's purpose. I then design the solution, considering user experience and technical feasibility. After implementing the feature, I conduct thorough testing before deploying it to ensure it meets all requirements.”

4. Can you expand on some software design patterns you have used?

This question tests your knowledge of software architecture and design principles.

How to Answer

Mention specific design patterns you’ve implemented, explaining their purpose and benefits in your projects.

Example

“I frequently use the Singleton pattern to ensure a class has only one instance and provide a global point of access. For instance, in a logging utility, I implemented a Singleton to manage log entries efficiently without creating multiple instances.”

5. What sorting algorithm is more beneficial in a specific environment?

This question evaluates your understanding of algorithms and their applications.

How to Answer

Discuss different sorting algorithms, their time complexities, and scenarios where one might be preferred over another.

Example

“In a scenario with a large dataset that is mostly sorted, I would choose the Insertion Sort algorithm due to its O(n) performance in best-case scenarios. However, for larger unsorted datasets, I would opt for Quick Sort for its average-case efficiency of O(n log n).”