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Sr Development Engineer Jobs in Missouri (NOW HIRING)

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 ...

Staffing the Universe

Sr SDET - STL,MO

Saint Louis, MO · On-site

$48.50 - $62.75/hr

Sr SDET(QE) - 2 Positions - New Only fulltime STL, MO Excellent communication skills, verbal and written; able to communicate with technical people as well as management and business Has a broad ...

Staffing the Universe

Sr SDET - STL,MO

Saint Louis, MO · On-site

$48.50 - $62.75/hr

Sr SDET(QE) - 2 Positions - New Only fulltime STL, MO Excellent communication skills, verbal and written; able to communicate with technical people as well as management and business Has a broad ...

MasterCard

Senior Software Engineer

O Fallon, MO · On-site

$115 - $184/hr

Senior Software Engineer Overview The MDES team is looking for a Senior Software Development Engineer to develop microservices-based enterprise applications using Java J2EE stack, including portals ...

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All JobsSr Development Engineer JobsSr Development Engineer Jobs in Missouri

Sr Development Engineer information

What is a Sr Development Engineer?

Sr Development Engineers are experienced professionals responsible for designing, developing, and improving products, systems, or software within an organization. They lead technical projects, mentor junior engineers, and collaborate with cross-functional teams to solve complex engineering problems. Their work often involves overseeing the entire development lifecycle, from concept to deployment, ensuring solutions meet quality, performance, and cost requirements.

What are the key skills and qualifications needed to thrive as a Sr Development Engineer?

To thrive as a Sr Development Engineer, you need deep expertise in engineering principles, advanced problem-solving abilities, and a relevant degree, often supported by substantial experience in product or software development. Familiarity with industry-standard tools such as CAD software, programming languages, or project management platforms, as well as certifications like PMP or Six Sigma, is highly advantageous. Strong communication, leadership, and collaboration skills are essential to effectively guide teams and drive innovation. These competencies are critical for delivering high-quality solutions, meeting project goals, and ensuring successful cross-functional teamwork.

What are some typical challenges faced by a Sr Development Engineer when leading cross-functional projects?

Sr Development Engineers often encounter challenges such as aligning diverse technical perspectives, managing conflicting priorities, and ensuring clear communication among cross-functional teams. They are responsible for bridging gaps between engineering, product management, and other departments to keep projects on track. Success in this role requires strong leadership, adaptability, and proactive problem-solving to address technical obstacles and facilitate collaboration. These experiences can significantly enhance leadership and project management skills, contributing to career advancement opportunities.

What is the difference between Sr Development Engineer vs Software Developer?

AspectSr Development EngineerSoftware Developer
Required CredentialsBachelor's or higher in CS or related field; experience in software designBachelor's in CS or related field; coding skills
Work EnvironmentDesigning, developing, and leading complex projectsWriting, testing, and maintaining code
Employer & Industry UsageTech companies, startups, large enterprisesWide range of industries, including tech, finance, healthcare
Common Search & ComparisonOften compared for seniority and project scopeMore entry to mid-level coding roles

The main difference between a Sr Development Engineer and a Software Developer lies in their responsibilities and experience level. Sr Development Engineers typically lead complex projects, design system architecture, and have more experience, while Software Developers focus on coding, testing, and maintaining software. Both roles require strong programming skills, but Sr Development Engineers often have additional leadership and design responsibilities.

How much does a senior development engineer make?

A senior development engineer typically earns between $100,000 and $150,000 annually, depending on experience, location, and industry. They often have advanced skills in programming, system design, and may hold certifications that influence salary levels.

What does a senior development engineer do?

A senior development engineer designs, develops, and tests software or hardware products, often leading projects and mentoring junior team members. They utilize programming languages, development tools, and engineering principles to create reliable and efficient solutions, typically working in collaborative environments with project deadlines and quality standards.

What are popular job titles related to Sr Development Engineer jobs in Missouri?

For Sr Development Engineer jobs in Missouri, the most frequently searched job titles are:

What job categories do people searching Sr Development Engineer jobs in Missouri look for?

The top searched job categories for Sr Development Engineer jobs in Missouri are:

Sr Development Engineer jobs near you
Infographic showing various Sr 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.

Senior Software Development Engineer in Test (SDET)

London Stock Exchange Group

Saint Louis, MO • On-site

$107K - $139K/yr

Full-time

Medical, Retirement

Posted 14 days ago

Job description

Job Description
SDET Engineers are involved in requirements analysis, test planning, writing test cases/scripts, test case automation, and execution of all testing (which may include application integration, system, system/network integration, performance testing and acceptance testing) required to ensure that the software is of the highest quality. After the project is released to production, these teammates are also involved to providing support to our internal customer, the technical operation group as well as service management. Besides, this role also plays a significant part of internal process audit and improvement to build efficiencies.
Main Responsibilities / Accountabilities:
  • Design, develop, and maintain scalable automated test solutions and frameworks using Python.
  • Build and implement automated tests for CLI, UI, API, integration, and end-to-end validation.
  • Collaborate with Product Owners, Business Analysts, Developers, and other team members to understand requirements and develop effective test strategies and test cases.
  • Drive Quality Engineering standard methodologies throughout the software development lifecycle.
  • Participate in test planning, test design, estimation, execution, and release activities within Agile teams.
  • Implement functional, integration, and regression testing across multiple platforms, including Linux and Windows environments.
  • Identify, document, prioritize, and supervise defects through resolution while performing root cause analysis.
  • Integrate automated tests into CI/CD pipelines to support continuous testing and rapid feedback cycles.
  • Perform API testing and data validation to ensure application reliability, accuracy, and consistency.
  • Work closely with globally distributed teams, ensuring effective collaboration across time zones and functions.
  • Use test management tools to run test execution, traceability, reporting, and quality metrics.
  • Support and ability to lead continuous improvement initiatives by evaluating and accepting modern testing tools, frameworks, and engineering practices.
Essential Skills & Experience
  • Experienced level in Quality Engineering, Test Automation, or SDET roles.
  • Work independently within defined parameters, taking ownership of problems within own area of knowledge.
  • Strong programming expertise in Python with experience developing reusable automation frameworks.
  • Experience implementing Behavior Driven Development (BDD) practices using Robot Framework and Gherkin/Cucumber.
  • Strong understanding of software testing methodologies, test build techniques, and Quality Engineering principles.
  • Hands-on experience integrating automated testing into CI/CD pipelines.
  • Proficiency with source code management tools such as GitLab, Bitbucket, or Git.
  • Experience working with TestRail or similar test management platforms.
  • Strong experience working within Agile/Scrum development environments.
  • Experience testing applications on both Linux and Windows platforms.
  • Expertise in cloud-native technologies and platforms such as AWS or Azure.
  • Knowledge of containerization and orchestration technologies including Docker and Kubernetes.
  • Excellent analytical, debugging, and problem-solving skills.
  • Strong communication and collaboration skills with the ability to work effectively in a global environment.
  • Proficiency with Networking, TCP/IP
Desired Skills
  • Hands-on experience with UI automation frameworks, including Playwright and/or Selenium.
  • Familiarity with AI-assisted development platforms including GitHub Copilot, Claude, or similar platforms.
  • Experience with Infrastructure as Code (IaC) testing, including exposure to Terraform and Bash scripting.
  • Experience with Application Performance testing.
  • Experience testing APIs and validating backend data using SQL and other validation techniques.
  • Exposure to modern DevOps and cloud-native architectures.
  • Understanding of performance, scalability, and reliability testing concepts.
  • Experience mentoring team members and promoting Quality Engineering standards.
  • Ability to quickly learn and adopt new tools, technologies.
  • Relevant certifications in Cloud, DevOps, Agile, or Quality Engineering subject areas.
Career Stage:
Senior Associate
London Stock Exchange Group (LSEG) Information:
Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.
LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.
Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.
Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.
We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone's race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.
You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.
LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.
Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it's used for, and how it's obtained, your rights and how to contact us as a data subject .
If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

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