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

Rapsodo

Senior Software Developer

Saint Louis, MO · On-site

$53 - $70/hr

Powered by Athletes who get it, and Engineers who can do it. Role Purpose This role exists to be the connective tissue between cross-functional teams, translating complex system trade-offs into clear ...

Rapsodo

Senior Software Developer

Saint Louis, MO

$53 - $70/hr

Powered by Athletes who get it, and Engineers who can do it. Role Purpose This role exists to be the connective tissue between cross-functional teams, translating complex system trade-offs into clear ...

Rapsodo

Senior Software Developer

Saint Louis, MO · On-site

$53 - $70/hr

Powered by Athletes who get it, and Engineers who can do it. Role Purpose This role exists to be the connective tissue between cross-functional teams, translating complex system trade-offs into clear ...

First Bank

Sr Software Developer - Power Apps

Saint Louis, MO · On-site

$51.75 - $68.25/hr

We are seeking a Senior Software Developer with deep expertise in API integration, AI operations, automation and RPA, data migration, and workflow optimization using the Microsoft Power Platform.

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All JobsSoftware Developer JobsSoftware Developer Jobs in O'Fallon, MO

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 Aug 18, 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 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.

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.

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 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.

Is a software developer still in demand?

Yes, software developers are in high demand due to ongoing digital transformation across industries. Skills in programming languages like Java, Python, and experience with cloud platforms increase employability, and the role is expected to grow as technology continues to advance.
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 August 2026, with employment types broken down into 1% As Needed, 83% Full Time, 12% Part Time, and 4% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution, with an average salary of $104,629 per year, or $50.3 per hour.

Software Developer | Military Veterans

INflow Federal

Saint Louis, MO • On-site

Full-time

Re-posted 24 days ago

Job description

About INflow Federal - founded in 2013, INflow Federal is a mission-driven small business delivering cutting-edge solutions to the Department of War (DoW) and Joint Force operations across 20+ states. Our strength comes from our people - especially the Veterans who make up over 50% of our workforce. Through our Veteran Outreach Program and employee-first culture, we invest deeply in professional growth, well-being, and innovation. Known for our agility, transparency, and integrity, INflow combines real-world experience with emerging technologies like AI/ML to help our customers lead in a rapidly evolving defense landscape. We empower both our employees and mission partners to stay ahead - driving smarter, faster, and more secure outcomes.
Job Overview:

INflow Federal is on the lookout for skilled transitioning military personnel and veterans who are passionate about leveraging their expertise in a new capacity within the government contracting sector. We offer an exceptional chance to progress your career as a Full Stack Software Engineer, allowing you to make a substantial contribution to the warfighter mission while expanding your professional horizon.

Established in 2013, INflow Federal is rooted in a culture that values its workforce above all, a philosophy that we believe is the cornerstone of our success. Our unwavering commitment to our team has consistently fueled our ability to deliver outstanding results for our clients. We take immense pride in our homegrown "Veteran Outreach Program," a testament to our dedication to empowering veterans. This initiative has been a key factor in ensuring that veterans constitute over half of our workforce, a distinction that underscores our adaptability, growth, and forward-looking stance in supporting mission-critical systems and operations.

As a Full Stack Software Engineer at INflow Federal, you will be instrumental in our mission to deliver state-of-the-art technological solutions to our DoD clients, playing a crucial role in the development and deployment of sophisticated software systems. Your expertise will contribute significantly to our strategic goals, facilitating the creation of robust, scalable, and innovative software solutions that enhance our operational capabilities and cybersecurity posture.

Here, your work is more than a job-it's a journey in innovation. With opportunities to work on high-impact projects, access to the latest technologies, and a culture that thrives on creativity and collaboration, INflow Federal is where your expertise can truly make a difference.
Related MOS Codes We're Seeking:
  • Army: 25B, 25C, 25F, 25L, 25N, 25Q, 25S, 25U, 25W, 25X, 94F 
  • USMC (United States Marine Corps): 0600, 0631, 0633, 0639, 0651, 0639, 0681, 0699, 0630, 0605, 0601, 2800, 2813, 2847, 2862, 5900, 5939, 5948, 5970, 5974, 5993
  • USAF (United States Air Force): 1D, 1D7X1A, 1B4X1 - Cyber Warfare Operations, 3D0X2 - Cyber Systems Operations, 3D1X2 - Cyber Transport Systems, 3D1X7 - Cable and Antenna Systems 
  • USN & USCG (United States Navy & United States Coast Guard): ET, ETN, ETV, ETR, Electronics Technician, IT, ITS, Information System Technician, IC, DS, Data Systems Technician 
Various Responsibilities & Requirements:
  • Proficiency in Full Stack Development: Proficiency in front-end and back-end technologies, frameworks, and languages. Familiarity with HTML, CSS, JavaScript, and one or more back-end languages (e.g., Java, Python, Ruby).
  • Cloud Technologies: Knowledge of cloud services, deployment, and management within platforms such as AWS, Azure, or Google Cloud. Ability to leverage cloud capabilities to optimize software solutions.
  • DevOps Practices: Familiarity with continuous integration/continuous deployment (CI/CD) pipelines, automated testing, and deployment strategies to streamline development and enhance collaboration.
  • Version Control Proficiency: Experience with version control systems like Git, understanding branching, merging, and pull request workflows to maintain code quality and collaborative development.
Clearance Requirements :
  • TS/SCI (CI poly required to start)
Certification Requirements
Most of our contracts require DoD 8140 (formerly 8570) compliance. We built 8140.study - our certification training platform - to help. This helps you study for certifications such as the CompTIA Security+.
Other Notes
  • Some travel may be required: Must have valid driver's license and transportation. This is subject to change at the direction of the customer.
  • If accommodation is needed with your application or the interview process for applicants with disabilities, please contact Human Resources at 703-594-8601.
  • Candidate must have the ability to lift up to 50 lbs.
  • Must have willingness to perform duties not listed in the job description as required by INflow and our customer.
Citizenship Requirements
* Please note that INflow Federal is a defense contractor. Pursuant to our government contracts, candidates must be US Citizens to be considered for employment.
Equal Opportunity Employer 
Diversity and Inclusion
INflow 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.
 
This commitment applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, leaves of absence, compensation, and training. Job applicants and employees are evaluated solely on job-related qualifications and experience.
 
 
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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