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Software Developer Jobs in O Fallon, MO (NOW HIRING)

MarketVolt

Software Developer

Saint Louis, MO · On-site

NET Software Developer / Software Engineer / Web Application Developer MarketVolt, LLC, a digital marketing software and services firm based in St. Louis, seeks a creative software developer who can ...

Marketvolt

Software Developer

Saint Louis, MO · On-site

NET Software Developer / Software Engineer / Web Application Developer MarketVolt, LLC, a digital marketing software and services firm based in St. Louis, seeks a creative software developer who can ...

Leidos

Software Developer

Saint Louis, MO

$107K - $195K/yr

The Leidos Spatial Solutions Division has an exciting opportunity for an experienced Software Developer to help enable NGA's Geospatial Intelligence (GEOINT) mission collecting sciences, technology ...

NextStep

GIS Software Developer

Saint Louis, MO · On-site

GIS Software Developer, St. Louis, MO Qualified GIS Software Developer candidates must be able to supply proof of US Citizenship in order to be authorized to perform work or have access to ...

The Timberline Group

Lead Software Developer

Saint Louis, MO · On-site +1

$112K - $141K/yr

The Lead IT Software Developer is a well-rounded expert on the team in Front-End frameworks (Aurelia, Angular and such) and Back-End (Microsoft SQL and C#/.NET). He / She is the go-to person for any ...

DCS Corp

Senior Level Software Developer

Saint Louis, MO

$53 - $70/hr

We are seeking a Software Engineer to support unique systems solutions for the National Geospatial-Intelligence Agency (NGA). We are seeking a Software Engineer to support our client's intelligence ...

The Timberline Group

Lead Software Developer

Saint Louis, MO · On-site

$112K - $141K/yr

The Lead IT Software Developer is a well-rounded expert on the team in Front-End frameworks (Aurelia, Angular and such) and Back-End (Microsoft SQL and C#/.NET). He / She is the go-to person for any ...

LRS

Software Developer

Maryland Heights, MO

$50 - $60/hr

LRS Consulting Services is seeking a SQL Developer (w/ CSG & ICOMS exp) for a contract opportunity. This role offers the chance to apply your skills in support of meaningful work for one of our ...

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Software Developer information

See O Fallon, MO salary details

$44.9K

$104.6K

$155.3K

How much do software developer jobs pay per year?

As of Jul 7, 2026, the average yearly pay for software developer in O'Fallon, MO is $104,629.00, according to ZipRecruiter salary data. Most workers in this role earn between $84,200.00 and $121,600.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Software Developer, and why are they important?

To thrive as a Software Developer, you need strong programming skills in languages like Java, Python, or JavaScript, as well as a solid understanding of computer science fundamentals and a relevant degree or equivalent experience. Familiarity with development tools such as Git, integrated development environments (IDEs), and frameworks like React or .NET is typically required, along with knowledge of agile methodologies or certifications. Problem-solving ability, attention to detail, teamwork, and effective communication are essential soft skills that help you excel in collaborative and fast-paced environments. These skills ensure you can build reliable, maintainable software and adapt to evolving project requirements and technologies.

What are some common challenges software developers face when working on team-based projects?

Software developers often encounter challenges such as coordinating with team members across different time zones, managing code integration from multiple contributors, and maintaining clear communication about project requirements. Effective use of version control systems like Git and regular participation in code reviews can help mitigate these issues. Additionally, adapting to evolving project goals and balancing technical debt with feature development are common hurdles that require strong collaboration and problem-solving skills.

What engineer makes $500,000 a year?

Senior software engineers, especially those working in high-cost-of-living areas or at major tech companies, can earn $500,000 or more annually through base salary, bonuses, and stock options. These roles typically require extensive experience, advanced technical skills, and often involve leadership or specialized expertise in areas like machine learning or cloud infrastructure.

What Do Software Developers Do?

Software developers design and create computer software programs and systems for their employer or client. Their job is to apply the principles of engineering, analytics, and computer science toward the development and testing of all kinds of software and applications. On a day-to-day basis, a software developer helps create and test software from start to finish. They discuss and analyze user requests and requirements, then research and brainstorm practical solutions to meet those needs, and determine the best course of action to create the application. As a software developer, you may develop an entirely new program or improve an existing one; you are responsible for a program’s overall framework and must design precise workflow charts that explain to programmers what code is needed for different aspects of the program.

Is AI replacing software developers?

AI is automating certain coding tasks and improving software development processes, but it is not replacing software developers. Developers are needed to design, oversee, and interpret AI tools, as well as to create complex, innovative solutions that require human judgment and expertise.

Is software developer still in demand?

Software developers are in high demand due to ongoing digital transformation across industries, with strong job growth projected in the coming years. Skills in programming languages, such as Java, Python, or JavaScript, and familiarity with development tools and frameworks increase employability in this field.

What work does a software developer do?

A software developer designs, writes, tests, and maintains computer programs and applications. They use programming languages like Java, Python, or C++ and often collaborate with teams to develop software solutions that meet user needs and specifications.

What is the difference between Software Developer vs Software Engineer?

AspectSoftware DeveloperSoftware Engineer
CredentialsBachelor's degree in CS or related field; coding certificationsBachelor's or higher in CS or Software Engineering; certifications may vary
Work EnvironmentDevelops, tests, and maintains software applicationsDesigns and develops software systems; often involved in architecture
Industry UsageCommonly used in tech companies, startups, and IT firmsUsed interchangeably with Software Developer in many organizations

While the roles often overlap, Software Developers focus on coding and building applications, whereas Software Engineers typically work on designing and architecting complex systems. Both roles require similar credentials and are integral to software creation, but their scope and responsibilities can differ based on project size and company structure.

What is a Software Developer?

A Software Developer is a professional who designs, builds, tests, and maintains computer programs or applications. They use programming languages to create software solutions that meet user needs, whether for desktop, mobile, or web platforms. Software Developers work closely with other team members such as designers, analysts, and testers to ensure the final product is functional, reliable, and user-friendly. Their responsibilities can range from writing code and fixing bugs to collaborating on system architecture and deploying updates.
More about Software Developer jobs
What are the most commonly searched types of Software Developer jobs in O'Fallon, MO? The most popular types of Software Developer jobs in O'Fallon, MO are:
What are popular job titles related to Software Developer jobs in O'Fallon, MO? For Software Developer jobs in O'Fallon, MO, the most frequently searched job titles are:
What cities near O'Fallon, MO are hiring for Software Developer jobs? Cities near O'Fallon, MO with the most Software Developer job openings:
Software Developer jobs near you
Infographic showing various Software Developer job openings in O'Fallon, MO as of July 2026, with employment types broken down into 85% Full Time, 3% Part Time, 1% Temporary, and 11% Contract. Highlights an 82% Physical, 3% Hybrid, and 15% Remote job distribution, with an average salary of $104,629 per year, or $50.3 per hour.
Software Developer

Software Developer

MarketVolt

Saint Louis, MO • On-site

Full-time

Medical, Retirement, PTO

Re-posted 5 days ago

Job description

C# .NET Software Developer / Software Engineer / Web Application Developer MarketVolt, LLC, a digital marketing software and services firm based in St. Louis, seeks a creative software developer who can thrive in a fast-paced, customer-driven environment. We're an established but small company with an aggressive growth plan

Our culture is dynamic and we are looking for candidates with an entrepreneurial attitude. We offer competitive salary and a benefits package that includes 100% company-paid health insurance, simple IRA with company match, and paid vacation, holiday and sick time. Our team collaborates on everything from user interface design to sales support.

So, the developer who joins our team will have: The mental agility to rapidly shift between different roles and perspectives - programmer, architect, customer. The ability to constructively contribute to a collaborative work environment. The intellectual confidence to analyze and debate ideas and designs.

The ability to assess and balance business drivers and customer needs. The ideal candidate will have a solid educational background and ideally 2+ years of post-college software development experience building robust, scalable, web-based software solutions. This individual does not shy away from challenges and enjoys working in a collaborative, fast paced, team oriented environment.

What you will be doing - Maintaining existing web applications and services - Designing and delivering robust, web applications and services to support our business - Collaborating with the customer support team to resolve customer reported issues - Assisting with infrastructure maintenance and support - Utilizing Agile software development practices - Iteratively and incrementally improving products and processes What we are looking for - Preferred BS/MS in Computer Science or related degree - 2+ years programming experience building enterprise web solutions - 1+ years of experience with Microsoft C#, .NET, MVC, SQL Server and agile practices - Experience developing web based software services and custom web server controls - Working knowledge of version control preferably with git The technologies you'll be working with Visual Studio 2017, C#, .NET Framework, ASP.NET MVC 3 or 4, ASP.NET, JavaScript, HTML, CSS, NHibernate, MS SQL Server, WCF, XML/XSL, SOAP/REST, JSON, AJAX, Web Services, Fluent Migrator, MongoDB, RabbitMQ, PowerMTA, Dependency Injection/Inversion of Control (Unity), NUnit, Ruby, AWS, Rackspace. If you are a talented Software Developer / Software Engineer with a passion for problem solving, please apply today. (Principals only, please)

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