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Mid Level Software Developer Jobs in Saint Louis, MO

LaunchCode

Software Engineer (TS/SCI)

Saint Louis, MO · On-site

$120K - $135K/yr

Our partner is seeking a passionate and mission-focused Mid-Level Software Engineer to support the AERO team and provide FAA and public air traffic control insights to NGA customers. This is an ...

Leidos

Mid-Level Test Engineer

Roxana, IL · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Madison, IL · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Chesterfield, MO · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Valley Park, MO · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Hartford, IL · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Hazelwood, MO · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Collinsville, IL · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

East Carondelet, IL · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

National Stock Yards, IL · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Maryville, IL · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Earth City, MO · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

East Saint Louis, IL · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Florissant, MO · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Fairview Heights, IL · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Saint Ann, MO · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Ballwin, MO · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

South Roxana, IL · On-site

$87K - $157K/yr

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 ...

Leidos

Mid-Level Test Engineer

Maryland Heights, MO · On-site

$87K - $157K/yr

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 ...

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Showing results 21-40

All JobsMid Level Software Developer JobsMid Level Software Developer Jobs in Saint Louis, MO

Mid Level Software Developer information

See Saint Louis, MO salary details

$45.5K

$106K

$157.4K

How much do mid level software developer jobs pay per year?

As of Sep 2, 2026, the average yearly pay for mid level software developer in Saint Louis, MO is $106,022.00, according to ZipRecruiter salary data. Most workers in this role earn between $85,300.00 and $123,200.00 per year, depending on experience, location, and employer.

What is a mid level software developer?

A Mid Level Software Developer is a professional with a few years of experience who contributes to designing, coding, testing, and maintaining software applications. They work independently on tasks but also collaborate with senior developers and teams to implement solutions. Their role often includes debugging code, optimizing performance, and ensuring best practices in development. Mid-level developers are expected to have a solid understanding of programming languages, frameworks, and software development life cycles. They may also mentor junior developers and participate in code reviews to maintain code quality.

What are the typical daily responsibilities of a mid level software developer?

As a Mid Level Software Developer, your daily responsibilities often include writing and reviewing code, participating in code reviews, collaborating with colleagues on project requirements, and troubleshooting bugs or technical issues. You may also be involved in designing features, writing unit tests, and participating in regular stand-up meetings as part of an agile team. Additionally, you'll interact with product managers, QA engineers, and other team members to ensure the software meets project deadlines and quality standards. This role offers the chance to take on increasing ownership of projects while continuing to learn and grow professionally.

What are the key skills and qualifications needed to thrive in the mid level software developer position, and why are they important?

To thrive as a Mid Level Software Developer, you should have solid programming skills in languages like Java, Python, or JavaScript, along with a relevant bachelor's degree or equivalent experience. Familiarity with version control systems such as Git, frameworks like React or Spring, and knowledge of agile development practices are typically required. Effective problem-solving, clear communication, and a collaborative mindset are valuable soft skills in this position. These skills enable you to build reliable software, contribute to team projects, and adapt to evolving technical challenges.

What are the most commonly searched types of Software Developer jobs in Saint Louis, MO?

The most popular types of Software Developer jobs in Saint Louis, MO are:

What are popular job titles related to Mid Level Software Developer jobs in Saint Louis, MO?

For Mid Level Software Developer jobs in Saint Louis, MO, the most frequently searched job titles are:

What job categories do people searching Mid Level Software Developer jobs in Saint Louis, MO look for?

The top searched job categories for Mid Level Software Developer jobs in Saint Louis, MO are:

What cities near Saint Louis, MO are hiring for Mid Level Software Developer jobs?

Cities near Saint Louis, MO with the most Mid Level Software Developer job openings:

Mid Level Software Developer jobs near you
Infographic showing various Mid Level Software Developer job openings in Saint Louis, MO as of August 2026, with employment types broken down into 89% Full Time, 8% Part Time, and 3% Contract. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution, with an average salary of $106,022 per year, or $51 per hour.

Mid Software Engineer (TS/SCI) - NGA with Security Clearance

LaunchCode

Saint Louis, MO • On-site

$120K - $135K/yr

Other

Posted 8 days ago

Job description

Description Position Type: Direct Hire / Full-Time Pay: $120,000-$135,000 + Relocation Assistance Location: Downtown St. Louis, MO or Springfield, VA Clearance: Active TS/SCI required Hiring Timeline: Immediate Company: The name of our partner organization will be disclosed during the interview process. This is not a direct role with LaunchCode; it is a position through LaunchCode, working with one of our partner companies. Disclaimer: We are unable to provide work sponsorship for this role. U.S. Citizenship and an active TS/SCI clearance are required for this position. Position Overview: Our partner is seeking a passionate and mission-focused Mid-Level Software Engineer to support the AERO team and provide FAA and public air traffic control insights to NGA customers. This is an opportunity to work with a modern technology stack while rapidly developing intelligence analysis products that address critical mission challenges for the agency and its users. The ideal candidate is energized by modern architectures, enjoys solving challenging technical problems, and can contribute across the software development lifecycle while working closely with other engineers and mission stakeholders. Position Responsibilities: * Design, develop, and maintain enterprise software applications using modern technologies, including React.js and Python.
* Develop high-performance front-end applications using React.js.
* Develop enterprise applications using Python.
* Develop and integrate RESTful web services and APIs.
* Contribute to microservice architecture, design, and development.
* Work with relational, spatial, and NoSQL databases.
* Design and develop database solutions supporting enterprise applications.
* Work with AWS cloud environments and AWS tooling, including S3.
* Translate business and mission requirements into scalable, production-ready technical solutions.
* Participate in the full software development lifecycle, including design, development, testing, deployment, and maintenance. * Collaborate with software engineers, technical teams, and mission stakeholders to deliver high-quality solutions.
* Contribute to modern software development practices and continuous improvement initiatives. Required Skills/Experience: * Bachelor's degree or equivalent in Computer Science, Engineering, Mathematics, Information Systems, or a related technical field.
* 4+ years of experience in enterprise software engineering/development.
* Experience with Python enterprise application development.
* Experience building high-performance applications using React.js.
* Foundational knowledge of Node.js.
* Experience with web services architecture, design, and development.
* Experience with relational database design.
* Experience with spatial database design.
* Experience with NoSQL database design.
* Experience with microservice architecture, design, and development.
* Experience working in AWS and utilizing AWS tooling such as S3.
* Ability to translate complex requirements into effective technical solutions. Desired Skills/Experience: * Experience with Spring applications.
* Experience as a full-stack developer across web services, databases, and front-end development.
* Experience developing geospatial information systems (GIS).
* Experience working with open-source and proprietary geospatial formats.
* Experience supporting intelligence analysis or other mission-focused applications.

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