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Senior Software Development Engineer Jobs in Missouri

Kanak Elite Services Inc

Sr. SDET Engineer

Missouri City, MO · On-site

$103K - $134K/yr

Positon : Sr. SDET Engineer Location : O'Fallon, MO Hybrid (Onsite 3 days/week) (local) Duration : 24 months contract Interview : 1st round virtual and second round would be in-person. Must haves:

Lorven Technologies

Sr. SDET - O Fallon, MO

Mcfall, MO · On-site

$44.75 - $57.50/hr

Title : Sr. SDET Position: Contract (W2)/ Fulltime Location: O'Fallon, MO Duration : 12 Months Key Skills and Experience: * Hands on Java/Rest API testing experience * Test automation, Ops gating ...

The Timberline Group

Senior Software Engineer

Saint Louis, MO · On-site +1

$119K - $157K/yr

We are looking for a Senior Software Engineer to produce and implement functional software ... If you also have hands-on experience with backend software development, we would like to meet you.

MasterCard

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

The successful candidate will contribute across the full software development lifecycle, from ... Role As a Senior Software Engineer, you will: Design, develop, test, deploy, and support scalable ...

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All JobsSoftware Development Engineer JobsSenior Software Development Engineer JobsSenior Software Development Engineer Jobs in Missouri

Senior Software Development Engineer information

See Missouri salary details

$70.8K

$134.4K

$180.1K

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

As of Aug 26, 2026, the average yearly pay for senior software development engineer in Missouri is $134,408.00, according to ZipRecruiter salary data. Most workers in this role earn between $114,900.00 and $151,500.00 per year, depending on experience, location, and employer.

What is a senior software development engineer?

Senior Software Development Engineers are experienced professionals who design, develop, and maintain complex software systems. They often lead technical projects, mentor junior developers, and ensure software quality and best practices within a team. Their responsibilities include writing code, conducting code reviews, collaborating with cross-functional teams, and solving challenging technical problems. Senior Software Development Engineers typically have several years of industry experience and a deep understanding of software engineering principles.

What are the key skills and qualifications needed to thrive as a senior software development engineer?

To thrive as a Senior Software Development Engineer, you need deep expertise in software engineering principles, advanced programming skills in languages such as Java, Python, or C++, and a bachelor's or higher degree in computer science or a related field. Familiarity with version control systems like Git, cloud platforms such as AWS or Azure, and experience with CI/CD pipelines are typically required, and certifications in these technologies can be advantageous. Strong problem-solving, leadership, and communication skills help you mentor junior engineers and collaborate effectively across teams. These competencies are critical for delivering robust solutions, driving technical innovation, and ensuring project success in complex engineering environments.

What are some common challenges senior software development engineers face when leading cross-functional projects?

Senior Software Development Engineers often encounter challenges such as aligning priorities across diverse teams, managing technical debt while delivering new features, and ensuring effective communication among stakeholders. Balancing hands-on coding with mentorship responsibilities and architectural decision-making can also be demanding. Success in this role typically requires strong interpersonal skills, proactive problem-solving, and the ability to adapt to shifting project requirements while maintaining high code quality.

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

AspectSenior Software Development EngineerSoftware Development Engineer
ExperienceTypically 5+ years, with leadership responsibilitiesEntry to mid-level, 1-3 years of experience
ResponsibilitiesDesigning complex systems, mentoring juniors, leading projectsImplementing features, fixing bugs, collaborating on code
Skills & CertificationsProficiency in multiple programming languages, system design, often with certificationsStrong coding skills, foundational knowledge, less emphasis on certifications
Work EnvironmentOften leads teams, involved in architecture decisionsFocused on individual contributions, team collaboration

The main difference between a Senior Software Development Engineer and a Software Development Engineer lies in experience, responsibilities, and leadership. Seniors typically lead projects and mentor others, while juniors focus on coding and task completion. Both roles are vital in software development teams, with seniors bringing more strategic input and mentorship.

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

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

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

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

Infographic showing various Senior Software Development Engineer job openings in Missouri as of August 2026, with employment types broken down into 1% As Needed, 85% Full Time, 12% Part Time, and 2% Contract. Highlights an 86% Physical, 3% Hybrid, and 11% Remote job distribution, with an average salary of $134,408 per year, or $64.6 per hour.

SENIOR SOFTWARE DEVELOPMENT ENGINEER IN TEST (Sr. SDET) at Resource Informatics Group Inc O Fal[...]

O Fallon, MO • On-site

Shell Lubricants Hub Hamburg
See more jobs at Shell Lubricants Hub Hamburgexternal

$90 - $120/hr

Other

Posted 20 days ago

Job description

SENIOR SOFTWARE DEVELOPMENT ENGINEER IN TEST (Sr. SDET) job at Resource Informatics Group Inc. O Fallon, MO.

Role: SENIOR SOFTWARE DEVELOPMENT ENGINEER IN TEST (Sr. SDET)

Location: O’fallon MO

Visa: USC/GC Preferred

Duration: 9 Months

Interview: Phone/Skype

Overview
  • Push Payments Development team owns a number of applications, primarily focusing on the Mastercard Send application.
  • Mastercard send is an API based application which primarily focuses on P2P and Disbursement transactions and is heavily integration with Mastercard core applications.
  • Automate UI, API and Batch regression test suites.
  • Integrate automation tests in CI/CD pipeline.
  • Participate in and provide direction to testing activities to ensure the quality and functionality of assigned MasterCard developed systems.

Do you want to be a part of a collaborative team environment

Are you motivated to stay on the cutting edge of digital payments technology

Role
  • Defect management and oversight
  • Performance Testing
  • Automated regression testing
  • Status reporting and metrics creation
  • Point of escalation for issues discovered during the testing phase
All About You
  • Expertise knowledge using Selenium and any BDD framework (Cucumber, Jasmine or JBehave)
  • Intermediate Knowledge in REST API testing and knowledge of any API automation framework (Restassured, Spock or Karate).
  • Intermediate Knowledge of StormRunner or other performance testing tools
  • Intermediate knowledge in core Java, Groovy, Node.js, and ReadyAPI
  • Advanced experience writing user stories and acceptance criteria
  • Strong communication and problem solving skills
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