Test Engineer

Leidos LLC; Gaithersburg (MD); Hybrid; USD 73,000 - 133,000; Full time

Job summary

Leidos is seeking a Test Engineer to join the Air Traffic Business Area within the Homeland Sector, supporting the development of the L-CAP platform. You will design and implement test automation frameworks for microservices and integrate tests into CI/CD pipelines.

The role emphasizes performance testing, distributed systems validation, and collaboration across engineering teams in an AI-first development environment. Hybrid work arrangement applies with on-site and remote options.

Qualifications

• Bachelor’s or Master’s degree in Computer Science, Software Engineering or related field.
• Experience with test automation frameworks (Selenium, JUnit, pytest or equivalent).
• Experience integrating automated testing into CI/CD pipelines using Jenkins, GitLab CI, or GitHub Actions.
• Experience with performance, integration, and API testing for distributed systems (e.g., JMeter, Gatling).
• Knowledge of distributed service testing including service virtualization, contract testing, chaos engineering, and data-driven test automation.
• Familiarity with Agile/SAFe testing, quality engineering, test management and defect tracking.
• Ability to obtain and maintain a Public Trust U.S. citizenship.
• Experience with AI-assisted development tools is a plus.

Responsibilities

• Design and implement test automation frameworks for microservices-based platform components.
• Build and maintain reusable test libraries and utilities for the L-CAP test infrastructure.
• Integrate automated tests into CI/CD pipelines ensuring continuous quality gates.
• Conduct performance testing to validate system behavior under load and stress.
• Execute integration testing across platform services, APIs, and external interfaces.
• Develop test plans aligned with sprint and PI objectives; analyze defects and metrics.
• Mentor junior test engineers on automation practices and testing methodologies.
• Adopt AI-assisted development tools to improve productivity and quality.

Skills

Test automation frameworks

CI/CD integration

API performance testing

Distributed system testing

Agile/SAFe testing

Python scripting

Education

CS/SE degree or related

Tools

Docker

Kubernetes

Jenkins

GitLab CI

GitHub Actions

Postman/Newman

Job description

Leidos Test Engineer – Air Traffic Business Area, Homeland Sector

Leidos is seeking a Test Engineer to join the Air Traffic Business Area within the Homeland Sector, supporting the development of the Leidos Common Automation Platform (L-CAP). L-CAP is a mission-critical, future-ready automation platform built on a hybrid cloud data mesh architecture, enabling next-generation air traffic management capabilities. We are building with an AI-first engineering mindset, embracing emerging AI capabilities and modern development practices to accelerate delivery, improve software quality, and continuously evolve how we design and build mission-critical systems. This role operates within a SAFe/Agile framework as part of an Agile Release Train (ART) delivering iterative value across the program.

This position supports government programs and requires the ability to obtain and maintain a favorable Public Trust investigation. This is a hybrid position requiring 3 days onsite and 2 days working from home, if you are located within a commutable distance (Less than 1 hour's drive one-way during normal traffic) from Gaithersburg, MD; Eagan, MN; or Egg Harbor Township, NJ. However, if you do not reside within a commutable distance, you may be considered for a 100% remote role.

What You’ll Do

Design and implement test automation frameworks for microservices-based platform components Build and maintain reusable test libraries and utilities for the L-CAP test infrastructure Integrate automated tests into CI/CD pipelines ensuring continuous quality gates Conduct performance testing to validate system behavior under load and stress conditions Execute integration testing across platform services, APIs, and external system interfaces Develop test plans and strategies aligned with sprint and PI objectives Analyze defect patterns and test metrics to identify quality trends and improvement opportunities Collaborate with development and systems engineering teams on testability and quality requirements Support test environment configuration and test data management activities Mentor junior test engineers on automation practices and testing methodologies Design and execute test scenarios based on operational ATC workflows ensuring modernized services replicate legacy system behavior Develop distributed service validation frameworks verifying inter-service communication, data flow, and performance under operational conditions Implement data-driven verification approaches supporting modernization of legacy automation functions Embrace an AI-first engineering culture by actively adopting AI-assisted development tools, automation, and modern engineering practices that improve productivity, code quality, and delivery velocity.

Core Technical Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or related discipline with 3+ years of experience, or Master’s degree with 2+ years (additional experience, education and training may be considered in lieu of degree)
• Experience with test automation frameworks (Selenium, JUnit, pytest, or equivalent) and Java or JavaScript test development
• Experience integrating automated testing into CI/CD pipelines using Jenkins, GitLab CI, GitHub Actions, or similar tools
• Experience with performance, integration, and API testing for distributed systems using tools such as JMeter or Gatling
• Knowledge of distributed service testing, including service virtualization, contract testing, chaos engineering, and data-driven test automation
• Experience with operational scenario-based testing, behavioral validation, root cause analysis, and defect investigation
• Familiarity with Agile/SAFe testing, quality engineering principles, test management, and defect tracking tools
• Ability to obtain and maintain a Public Trust U.S. citizenship required
• Successful completion of background investigations as required by the government customer

Preferred / Desired Qualifications

• Python scripting and test development proficiency
• Experience testing microservices and event-driven architectures
• Knowledge of containerized test environments (Docker, Kubernetes)
• Experience with API testing frameworks (REST Assured, Postman/Newman)
• Familiarity with security testing tools and practices
• Experience in aviation, defense, or safety-critical testing domains
• Knowledge of test-driven development (TDD) and behavior-driven development (BDD)
• Experience with AI-assisted development tools (e.g., code generation, automated testing, intelligent debugging)
• Experience testing legacy-to-modern migration verifying functional equivalence between old and new systems

Why Leidos?

You’ll work on systems where performance, precision, and reliability matter - every second. This is not experimental AI for prototypes. This is disciplined, responsible AI applied to mission-critical software that supports national infrastructure. If you’re excited by solving complex problems in regulated, real-world environments - and using AI as a force multiplier rather than a shortcut - we’d like to talk.

At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Pay

Original Posting: October 1, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range: Pay Range $73,450.00 - $132,775.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos

Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers.

• Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement.

More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.