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

Stellar IT Group

Software Engineer

Saint Louis, MO · On-site

Software Engineer IV Job Location: Remote Job Type: 6-12+ Months Job Details: We are seeking a highly skilled and experienced Software Engineer IV to join our dynamic engineering team. The ideal ...

BAI

Software Engineer

Saint Louis, MO · On-site +1

$75K - $95K/yr

Software Engineer Reports To: Manager, Software Engineering BAI and RMA have come together as ProSight Financial Association, a leading industry organization whose purpose is to empower financial ...

Medium

Software Engineer

Saint Louis, MO · On-site

$100 - $130/hr

Software Engineer Qualifications... * Bachelor's degree in Computer Science, Software Engineering, or related field and 6+ years experience. * Strong proficiency with: HTML, CSS, JSON, Ajax, and REST ...

MiTek, Inc.

Software Engineer

Chesterfield, MO · On-site

$85K - $140K/yr

Job Responsibilities & Requirements As a Software Engineer in MiTek's Homebuilder division, you will help design, develop, modernize, and support MiTek Kova, a web-based ERP platform used by ...

Boeing

Software Engineer

Maryland Heights, MO

Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost ...

Boeing

Software Engineer

Hazelwood, MO · On-site

$105K - $147K/yr

Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost ...

Boeing

Software Engineer

Maryland Heights, MO · On-site

Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost ...

Boeing

Software Engineer

Hazelwood, MO · On-site

$105K - $147K/yr

Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost ...

Boeing

Software Engineer

Maryland Heights, MO · On-site

Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost ...

Boeing

Software Engineer

Maryland Heights, MO

Tapestry Solutions, a part of Boeing Global Services BGS, is seeking a Software Engineer in Maryland Heights, MO to support future franchise programs. This role involves software development for the ...

MasterCard

Senior Software Engineer

O Fallon, MO

$114K - $151K/yr

Title and Summary Senior Software Engineer Overview Mastercard's Network & Digital Payments group creates meaningful digital payment experiences for consumers, merchants, issuers, and partners at ...

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Software Engineer information

See O Fallon, MO salary details

$59.4K

$138K

$192.2K

How much do software engineer jobs pay per year?

As of Aug 22, 2026, the average yearly pay for software engineer in O'Fallon, MO is $138,005.00, according to ZipRecruiter salary data. Most workers in this role earn between $112,300.00 and $161,800.00 per year, depending on experience, location, and employer.

What is a software engineer?

Software Engineers are professionals who design, develop, test, and maintain computer software and systems. They use programming languages, engineering principles, and problem-solving skills to build applications, websites, or software solutions that meet specific needs. Software Engineers may work in a variety of industries, such as technology, finance, healthcare, or entertainment, collaborating with other team members to deliver functional and reliable software. Their role often involves analyzing user requirements, writing code, debugging errors, and continually improving software performance.

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

To thrive as a Software Engineer, you need strong programming skills, problem-solving abilities, and a degree in computer science or a related field. Familiarity with coding languages (such as Python, Java, or C++), version control systems like Git, and knowledge of software development methodologies are typically required. Excellent teamwork, communication, and adaptability distinguish top performers in this role. These skills ensure efficient, high-quality software development that meets user needs and adapts to technological changes.

What are some common challenges software engineers face when collaborating on large development teams?

Software engineers working on large teams often encounter challenges with communication, code integration, and maintaining consistent coding standards. Coordinating across multiple developers can lead to merge conflicts and misunderstandings about project requirements or priorities. Adopting tools like version control systems, regular code reviews, and clear documentation helps mitigate these issues. Building strong collaboration skills and proactively seeking clarification are key to ensuring smooth teamwork and project success.

What is the difference between Software Engineer vs Software Developer?

AspectSoftware EngineerSoftware Developer
CredentialsBachelor's degree in CS or related field, certificationsBachelor's degree often preferred, certifications optional
Work EnvironmentDesigning, developing, testing, and maintaining software systemsWriting, coding, and implementing software applications
Industry UsageUsed across tech, finance, healthcare, and more for system-level rolesCommonly used in app and web development projects
Search IntentUnderstanding roles, responsibilities, and qualificationsLearning about coding, programming, and project work

While both roles involve software creation, Software Engineers typically focus on designing and architecting complex systems, whereas Software Developers mainly concentrate on coding and building specific applications. The roles often overlap, but the Engineer role may require broader system knowledge and design skills.

Are software engineers still in demand?

Yes, software engineers are in high demand across many industries due to ongoing digital transformation, the growth of cloud computing, and the need for software development, maintenance, and cybersecurity skills. The profession offers strong job stability, competitive salaries, and opportunities to work with various programming languages and tools.

Is 25 too late to become a software engineer?

Age is not a barrier to becoming a software engineer; many professionals start careers in tech in their mid-20s or later. Success depends on acquiring relevant skills, such as programming languages and problem-solving, often through coding bootcamps, online courses, or formal education. Employers value skills and experience over age, making it possible to enter the field at 25 or older.
More about Software Engineer jobs

What are the most commonly searched types of Software Engineer jobs in O'Fallon, MO?

The most popular types of Software Engineer jobs in O'Fallon, MO are:

What are popular job titles related to Software Engineer jobs in O'Fallon, MO?

For Software Engineer jobs in O'Fallon, MO, the most frequently searched job titles are:

What cities near O'Fallon, MO are hiring for Software Engineer jobs?

Cities near O'Fallon, MO with the most Software Engineer job openings:

Software Engineer jobs near you
Infographic showing various Software Engineer job openings in O'Fallon, MO as of August 2026, with employment types broken down into 60% Full Time, and 40% Contract. Highlights an 80% In-person, and 20% Remote job distribution, with an average salary of $138,005 per year, or $66.3 per hour.

Software Engineer

Stellar IT Group

Saint Louis, MO • On-site

Full-time

Re-posted 26 days ago

Job description

Overview:
Job Title: Software Engineer IV
Job Location: Remote
Job Type: 6-12+ Months
Job Details:
We are seeking a highly skilled and experienced Software Engineer IV to join our dynamic engineering team. The ideal candidate will bring deep expertise in React, .NET, and AWS, along with a proven track record of building scalable, high-performance applications. This role requires strong technical leadership, problem-solving abilities, and a passion for delivering innovative solutions.
Responsibilities
  • Design, develop, and maintain complex software applications using React and .NET frameworks.
  • Architect and implement cloud-native solutions leveraging AWS services (EC2, Lambda, S3, RDS, etc.).
  • Collaborate with cross-functional teams including product managers, designers, and QA engineers to deliver high-quality software.
  • Drive best practices in coding standards, architecture, and software development processes.
  • Mentor junior engineers and contribute to team growth through knowledge sharing and technical guidance.
  • Optimize application performance, scalability, and reliability.
  • Participate in code reviews, design discussions, and technical planning sessions.
  • Stay current with emerging technologies and recommend adoption where appropriate.

Qualifications
  • 7+ years of professional software engineering experience.
  • Strong proficiency in React for building modern, responsive web applications.
  • Advanced expertise in .NET (C#, ASP.NET Core) for backend development.
  • Hands-on experience with AWS cloud services and cloud-native application design.
  • Solid understanding of software engineering principles, design patterns, and best practices.
  • Experience with CI/CD pipelines, containerization (Docker, Kubernetes), and DevOps practices is a plus.
  • Excellent problem-solving, analytical, and communication skills.
  • Bachelor's or Master's degree in Computer Science, Engineering, or related field.

Skills:
.net,react,aws

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