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Senior Software Development Engineer In Test Jobs in Missouri

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$115 - $184/hr

Drive improvements in test automation, code coverage, and system reliability * Analyze and optimize ... Exposure to AI/automation tools within software development workflows Corporate Security ...

The Timberline Group

Senior Software Engineer

Saint Louis, MO · On-site +1

$119K - $157K/yr

Design, implement, review, test, debug, and document high-quality software * Discuss, review and ... Efficiently identify, prioritize and complete tasks in agile scrum software development life cycle

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

The position requires strong expertise in Java-based application development, Spring Boot, Kafka ... Design, develop, test, deploy, and support scalable software solutions that power Mastercard ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

The position requires strong expertise in Java-based application development, Spring Boot, Kafka ... Role As a Senior Software Engineer, you will: • Design, develop, test, deploy, and support ...

Mastercard, Inc.

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

... in test automation, code coverage, and system reliability • Analyze and optimize system ... development workflows Corporate Security Responsibility All activities involving access to ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

... in test automation, code coverage, and system reliability Analyze and optimize system performance ... development workflows Corporate Security Responsibility All activities involving access to ...

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Senior Software Development Engineer In Test information

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$21.1K

$117.8K

$153.4K

How much do senior software development engineer in test jobs pay per year?

As of Aug 20, 2026, the average yearly pay for senior software development engineer in test in Missouri is $117,776.00, according to ZipRecruiter salary data. Most workers in this role earn between $103,600.00 and $134,600.00 per year, depending on experience, location, and employer.

What does a senior software development engineer in test do?

A Senior Software Development Engineer in Test (SDET) is responsible for designing, developing, and maintaining automated test frameworks and tools to ensure the quality and reliability of software products. They work closely with development and QA teams to identify test requirements, create robust test cases, and integrate automated tests into the CI/CD pipeline. In addition to coding and scripting, Senior SDETs mentor junior team members, analyze test results, and help troubleshoot complex issues to continuously improve software quality. Their expertise bridges the gap between development and testing, ensuring both speed and quality in software releases.

How does a senior software development engineer in test typically collaborate with development and product teams to ensure software quality?

As a Senior Software Development Engineer In Test (SDET), you will work closely with both development and product teams throughout the software development lifecycle. This includes participating in design and requirements discussions to identify potential test cases early, contributing to test automation strategies, and providing feedback on testability and quality risks. SDETs often pair with developers to review code, co-create test plans, and triage bugs together, ensuring that testing is fully integrated into the CI/CD pipeline. Effective communication and cross-team collaboration are essential for proactively identifying issues and maintaining high software quality standards.

What are the key skills and qualifications needed to thrive as a senior software development engineer in test, and why are they important?

To thrive as a Senior Software Development Engineer In Test, you need advanced programming skills, deep knowledge of software testing methodologies, and a bachelor's degree in computer science or a related field. Expertise with automation frameworks (such as Selenium, Cypress, or Appium), CI/CD tools, and scripting languages is typically required, along with relevant certifications like ISTQB. Strong analytical thinking, problem-solving, and effective communication are crucial soft skills for collaborating with cross-functional teams and driving quality initiatives. These capabilities ensure rigorous test coverage, faster release cycles, and high-quality software products.

What is the difference between Senior Software Development Engineer In Test vs Software Development Engineer In Test?

AspectSenior Software Development Engineer In TestSoftware Development Engineer In Test
ExperienceTypically 5+ years in testing and developmentEntry to mid-level, 1-3 years experience
ResponsibilitiesDesigns complex test frameworks, mentors juniors, leads testing initiativesDevelops test cases, automates tests, executes testing tasks
Skills & CertificationsAdvanced coding, automation, testing tools, leadership skillsProgramming, automation, testing tools
Work EnvironmentCollaborates with cross-functional teams, often in Agile settingsWorks closely with developers, focuses on automation and manual testing

In summary, a Senior Software Development Engineer In Test has more experience, leadership responsibilities, and strategic testing roles compared to a Software Development Engineer In Test, who primarily focuses on developing and executing tests.

What are the most commonly searched types of Software Development Engineer In Test jobs in Missouri?

The most popular types of Software Development Engineer In Test jobs in Missouri are:

What are popular job titles related to Senior Software Development Engineer In Test jobs in Missouri?

For Senior Software Development Engineer In Test jobs in Missouri, the most frequently searched job titles are:

What job categories do people searching Senior Software Development Engineer In Test jobs in Missouri look for?

The top searched job categories for Senior Software Development Engineer In Test jobs in Missouri are:

What cities in Missouri are hiring for Senior Software Development Engineer In Test jobs?

Cities in Missouri with the most Senior Software Development Engineer In Test job openings:

Senior Software Development Engineer In Test jobs near you
Infographic showing various Senior Software Development Engineer In Test job openings in Missouri as of August 2026, with employment types broken down into 1% As Needed, 81% Full Time, 15% Part Time, and 3% Contract. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution, with an average salary of $117,776 per year, or $56.6 per hour.

Software Development Engineer

Fractal Analytics Inc

California, MO • On-site

$90 - $160/hr

Other

Medical, Dental, Vision, Life, Retirement, PTO

Posted 2 days ago

New

Job description

Role Overview

Senior Software Development Engineer – San Francisco Bay Area (100% onsite). This role involves developing and deploying cutting‑edge, AI‑driven enterprise applications on the client’s proprietary AI platform.

Location & Availability

San Francisco Bay Area – 100% onsite required. Candidates who are not local are offered weekly travel or relocation support. This position is not eligible for immigration sponsorship at this time.

Responsibilities
  • Design, develop, and deploy full‑stack AI‑centric enterprise applications on the client AI platform, ensuring integration with advanced data solutions.
  • Lead architecture, development, and maintenance of comprehensive data integration systems using efficient ETL processes with Python, Pandas, and NumPy for large‑scale data manipulation.
  • Implement and maintain application functionality using JavaScript or another object‑oriented language (e.g., Python, C#) in client environments.
  • Proactively test, diagnose, and refine software applications alongside clients to achieve high quality and optimal functionality.
  • Identify and rectify performance issues within applications and integrated data systems, focusing on efficiency, optimization, and data integrity.
  • Utilize shell scripting and cron job scheduling for automating routine data operations, ETL tasks, and ensuring data accuracy and harmonization.
  • Participate in and lead design and review processes for internal and client software applications.
  • Implement and manage version control using Git, handling repository operations including rebase, pull, push, and branch management.
  • Create detailed application specifications and maintain precise documentation throughout the software lifecycle.
Qualifications
  • Interest and ability to become certified on the end client AI platform (training and support provided).
  • Bachelor’s degree in computer science, related field, or equivalent experience.
  • Proficiency in software development with JavaScript and Python.
  • Experience with CI/CD practices and version control systems, preferably GitLab.
  • Strong background in shell scripting and cron job scheduling for automating data processes.
  • Experience with various JavaScript frameworks (React, Redux, Vue, Backbone, Angular).
  • Experience deploying software on leading cloud computing platforms (GCP, AWS, Azure).
  • Understanding of SQL and NoSQL database technologies.
  • Strong skills in data structures, algorithm design, and implementation.
  • Proficiency in handling and analyzing time‑series data, including cleansing and normalization.
  • Familiarity with Agile software development methodologies.
Pay

Estimated salary range: $90,000 to $160,000. Bonus eligibility may apply.

Benefits
  • Health, dental, vision, life insurance, and disability plans (full‑time employees).
  • 401(k) plan participation after 30 days of employment.
  • 11 paid holidays and 12 weeks of parental leave.
  • Flexible “free time” PTO policy for sick time or vacation.
Equal Opportunity Employer

Fractal provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

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