Top 328 Test engineer Jobs in Saint Peters, Mo

Mid-Level Test Engineer
Leidos —St. Louis, MO
- $87,100 - $157,450 a year
- Full-time
- Azure
- Computer Science
- Mid-level
11d
Firmware Engineer
TRUE MANUFACTURING GROUP —O'Fallon, MO
- $125,000 - $140,000 a year
- Full-time
- Background check
- Computer Science
- Office
- Free parking
- Paid training
Lead Site Reliability Engineer
Mastercard —O'Fallon, MO
- $122,000 - $207,000 a year
- Online Application
- Computer science
- Computer Science
- DevOps
- Paid jury duty
- Health savings account
Software Engineer II - Decision Management Program
Mastercard —O'Fallon, MO
- $92,000 - $147,000 a year
- Online Application
- Computer science
- Computer Science
- Mid-level
- Paid jury duty
- Health savings account
2d
Senior Software Engineer
Mastercard —O'Fallon, MO
- $115,000 - $184,000 a year
- Online Application
- Computer science
- Computer Science
- System design
- Paid jury duty
- Health savings account
Software Engineer II
Mastercard —O'Fallon, MO
- $92,000 - $147,000 a year
- Online Application
- Computer science
- Computer Science
- Mid-level
- Paid jury duty
- Health savings account
Senior Site Reliability Engineer, Performance Engineering
Mastercard —O'Fallon, MO
- $96,000 - $163,000 a year
- Online Application
- Computer Science
- System design
- Java
- Paid jury duty
- Health savings account
2d
Senior QA Engineer – Healthcare
Cognizant —Earth City, MO
- $53,477 - $92,500 a year
- Full-time
- Remote
- US work authorization
- Senior level
- Paid parental leave
- Employee stock purchase plan
3d
QA Automation Engineer – Healthcare
Cognizant —Earth City, MO
- $44,834 - $76,500 a year
- Full-time
- Remote
- AWS
- US work authorization
- Senior level
- Paid parental leave
- Employee stock purchase plan
3d
Software Engineer I
Mastercard —O'Fallon, MO
- $72,000 - $115,000 a year
- Online Application
- Analysis skills
- Communication skills
- Entry level
- Paid jury duty
- Health savings account
Data Engineer II
Mastercard —O'Fallon, MO
- $92,000 - $147,000 a year
- Online Application
- Analysis skills
- Continuous improvement
- Senior level
- Paid jury duty
- Health savings account
2d
Manager, AI Engineering (Tester )
Mastercard —O'Fallon, MO
- $140,000 - $231,000 a year
- Online Application
- Azure
- Computer Science
- Research
- Paid jury duty
- Health savings account
9d
Software Test Engineer
Boeing —Hazelwood, MO
- $70,000 - $86,000 a year
- Computer science
- Azure
- Computer Science
- Health savings account
- Disability insurance
High Voltage Test Engineer
Hitachi —Earth City, MO
- $105,800 - $158,600 a year
- Full-time
- Up to 50% travel
- 5 years
- Engineering
- AD&D insurance
- Disability insurance
Software Test Automation Engineer
Boeing —Hazelwood, MO
- $87,000 - $105,780 a year
- Computer science
- Computer Science
- Software troubleshooting
- Health savings account
- Disability insurance
Field Service Engineer - Data Center
Hitachi —Earth City, MO
- Full-time
- Customer service
- Mid-level
- 3 years
- AD&D insurance
- Disability insurance
9d
Systems Engineer II (Remote) - WashU IT, Shared Infrastructure Data Center
Washington University in St. Louis —St. Louis, MO
- $65,900 - $112,700 a year
- Online Application
- Remote
- Writing skills
- Pass drug screening
- Research
- Commuter assistance
- Employee assistance program
5d
Controls Engineer III
Beckwood Press —Fenton, MO
- Full-time
- System design
- Office
- Travel
- AD&D insurance
- Health insurance
Quick Apply
Vehicle or Industrial Electrician
Intramotev —St. Louis, MO
- $26 - $32 an hour
- Full-time
- English
- Mid-level
- 3 years
- Paid holidays
- Relocation assistance
Quick Apply
Process Engineer
Air Products and Chemical —St. Louis, MO
- Online Application
- Clean driving record
- Mid-level
- 3 years
- Paid parental leave
- AD&D insurance
Quick Apply

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Mid-Level Test Engineer

Leidos -
St. Louis, MO

Apply Now

Job Details

Full-time
$87,100 - $157,450 a year
11 days ago

Qualifications

Software issue identification
Bug Tracking (Quality assurance practices)
Bug Reporting (Quality assurance practices)
Agile software development
Defect tracking tools
DevOps automation
Project stakeholder communication
Cross-functional communication
Test Planning (Quality assurance practices)

Full Job Description

Description

Job Description:

Are you passionate about delivering high-quality software that directly supports our nation’s security? Leidos is seeking an experienced Mid-Level Test Engineer to join the Chinook Program supporting an Intelligence Community customer. This is an opportunity to work alongside talented engineers, software developers, product managers, and mission experts to build innovative geospatial intelligence capabilities that enable critical national security missions.

If you’re energized by solving complex technical challenges, championing quality throughout the software development lifecycle, and driving continuous improvement in an Agile environment, we’d like to hear from you.

As a Mid-Level Test Engineer, you will play a key role in ensuring the delivery of reliable, secure, and high-performing software solutions. You’ll work as an integral member of a cross-functional Agile Scrum Team, developing and executing comprehensive test strategies that support rapid, iterative delivery while maintaining exceptional quality standards.

This role is ideal for someone who thrives in a collaborative DevSecOps environment and enjoys automating testing, and improving processes.

Position may be performed in the following locations below. Please note Gaithersburg, MD is the program’s primary work location.

Gaithersburg, MD

Alexandria, VA
Chantilly, VA
Englewood, CO
St. Louis, MO
Tucson, AZ

Clearance Level Required:

Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.

Primary Responsibilities:

Lead planning, design, development, and execution of comprehensive test strategies across multiple Agile sprints.
Design, develop, and maintain automated and manual test cases for new and existing capabilities.
Collaborate daily with software engineers, product managers, system engineers, and Scrum Masters to define acceptance criteria and ensure quality is built into every release.
Perform functional, integration, regression, system, and end-to-end testing.
Validate application performance, reliability, security, and usability.
Identify, document, prioritize, and track software defects through resolution.
Support Continuous Integration/Continuous Delivery (CI/CD) pipelines by integrating automated testing into deployment workflows.
Analyze test results, communicate risks, and provide recommendations that improve software quality.
Contribute to continuous process improvement initiatives that enhance Agile team effectiveness.

Basic Qualifications:

US citizenship is required per contract.
Bachelor's degree in Computer Science, Engineering, Information Technology or related field and 4-8 years of prior relevant experience or Master’s with 2-6 years of prior relevant experience.
6+ years of software testing or quality engineering experience.
Experience supporting Agile software development programs.
Demonstrated experience creating and executing manual and automated test plans.
Experience with automated testing tools such as Cypress, Playwright, or equivalent.
Experience with API testing using tools such as Postman or REST Assured.
Familiarity with CI/CD tools including Jenkins, GitLab, Azure DevOps, or similar platforms.
Experience with defect management tools such as Jira.
Ability to communicate results and issues to technical and non-technical customer stakeholders.

Preferred Qualifications:

Experience supporting DoD or Intelligence Community programs.
Familiarity with scripting languages including JavaScript, and Python.
Knowledge of containerized applications using Docker and Kubernetes.
Experience with performance testing tools such as JMeter or LoadRunner.
Familiarity with cloud technologies including AWS, Azure, or OpenShift
Knowledge of DevSecOps pipelines and automated quality assurance practices.
Experience working with modern software delivery environments.
Experience with geospatial applications or GEOINT data.
Certifications such as ISTQB, CASTP, CAST, CSTE, Security+, or similar.

#Chinook

#NSBA

If you're looking for comfort, keep scrolling. 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.

Original Posting:

July 21, 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 $87,100.00 - $157,450.00

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 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 $16.7 billion for the fiscal year ended January 3, 2025. 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 at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [email protected].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

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.

Apply Now

Refine Your Search

test engineer jobs in saint peters, mo

Mid-Level Test Engineer

Firmware Engineer

Lead Site Reliability Engineer

Software Engineer II - Decision Management Program

Senior Software Engineer

Software Engineer II

Senior Site Reliability Engineer, Performance Engineering

Senior QA Engineer – Healthcare

QA Automation Engineer – Healthcare

Software Engineer I

Data Engineer II

Manager, AI Engineering (Tester )

Software Test Engineer

High Voltage Test Engineer

Software Test Automation Engineer

Field Service Engineer - Data Center

Systems Engineer II (Remote) - WashU IT, Shared Infrastructure Data Center

Controls Engineer III

Vehicle or Industrial Electrician

Process Engineer

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