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Senior Software Developer Jobs in O Fallon, IL (NOW HIRING)

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 ...

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 ...

ENGR SR SOFTWARE DEVT

Saint Louis, MO · Remote

$119K - $157K/yr

Senior Software Engineer 3M Health Care is now Solventum At Solventum, we enable better, smarter, safer healthcare to improve lives. As a new company with a long legacy of creating breakthrough ...

ENGR SR SOFTWARE DEVT

Saint Louis, MO · Remote

$119K - $157K/yr

Senior Software Engineer 3M Health Care is now Solventum At Solventum, we enable better, smarter, safer healthcare to improve lives. As a new company with a long legacy of creating breakthrough ...

Senior Software Engineer

Saint Louis, MO · On-site

$119K - $157K/yr

We are seeking a highly skilled Full-Stack Senior Software Engineer to join our team. In this role, you will design, develop, and maintain modern web applications across the stack. The ideal ...

Showing results 41-60

Senior Software Developer information

See O Fallon, IL salary details

$14

$57

$81

How much do senior software developer jobs pay per hour?

As of Aug 12, 2026, the average hourly pay for senior software developer in O'Fallon, IL is $57.58, according to ZipRecruiter salary data. Most workers in this role earn between $48.89 and $64.57 per hour, depending on experience, location, and employer.

What skills and qualifications are needed to thrive as a senior software developer?

To thrive as a Senior Software Developer, you need deep expertise in programming languages, software architecture, and problem-solving, typically backed by a bachelor’s degree in computer science or a related field. Proficiency with development frameworks, version control systems like Git, and cloud platforms such as AWS or Azure is standard, and certifications in these areas can be beneficial. Leadership, strong communication, and mentoring abilities set standout candidates apart in this role. These skills ensure that complex projects are delivered efficiently, code quality is maintained, and junior team members are effectively guided for overall team success.

What does a senior software developer do?

As a Senior Software Developer, you’ll typically be responsible for leading complex development projects, designing technical solutions, and mentoring junior team members. Daily tasks often include writing and reviewing code, participating in architecture discussions, collaborating with cross-functional teams (such as QA, product management, and DevOps), and troubleshooting high-level technical issues. You may also be involved in setting coding standards, conducting code reviews, and helping to plan sprints or project roadmaps.

What is a senior software developer?

Senior Software Developers are experienced professionals who design, develop, and maintain complex software applications. They often lead development teams, mentor junior developers, and make critical architectural decisions. Their responsibilities include writing high-quality code, troubleshooting technical issues, and ensuring that software projects meet performance and security standards. With deep expertise in programming languages and software engineering principles, they play a key role in delivering successful technology solutions for organizations.

What is the difference between Senior Software Developer vs Software Engineer?

AspectSenior Software DeveloperSoftware Engineer
CredentialsBachelor's degree in CS or related field; experience often 5+ yearsBachelor's or higher in CS or related field; similar experience levels
Work EnvironmentCollaborates on complex projects, mentors juniors, leads technical effortsDesigns, develops, tests software; may work on specific modules or systems
Industry UsageCommonly used in tech companies, startups, and enterprise firmsWidely used across industries, often interchangeable with developer roles

The main difference is that Senior Software Developers typically have more experience, leadership responsibilities, and focus on complex project oversight, while Software Engineers may focus more on designing and implementing software solutions. Both roles require similar credentials and are integral in software development teams, but Senior Software Developers often take on mentorship and strategic tasks.

What are the most commonly searched types of Software Developer jobs in O'Fallon, IL? The most popular types of Software Developer jobs in O'Fallon, IL are:
What are popular job titles related to Senior Software Developer jobs in O'Fallon, IL? For Senior Software Developer jobs in O'Fallon, IL, the most frequently searched job titles are:
What cities near O'Fallon, IL are hiring for Senior Software Developer jobs? Cities near O'Fallon, IL with the most Senior Software Developer job openings:
Infographic showing various Senior Software Developer job openings in O'Fallon, IL as of August 2026, with employment types broken down into 1% Internship, 90% Full Time, 6% Part Time, and 3% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution, with an average salary of $119,772 per year, or $57.6 per hour.

Software Developer Engineer (Experienced or Senior)

Boeing

Berkeley, MO

$51.25 - $67.50/hr

Full-time

Medical, Life, Retirement

Re-posted 18 days ago


Boeing rating

8.5

Company rating: 8.5 out of 10

Based on 612 frontline employees who took The Breakroom Quiz

33rd of 538 rated manufacturers


Job description

Software Developer Engineer (Experienced or Senior)

Company:

The Boeing Company

The Boeing Company is looking for a Software Developer Engineer (Experienced or Senior) to join the Digital Analytics and System Health (DASH) software team in Hazelwood, MO. This role will support one or more programs in the DASH portfolio within the Boeing Global Services (BGS) organization. The selected candidate will join our dynamic group focused on model-based sustainment simulation capabilities to provide action insights to support faster, data-driven decisions on fleet health. This role will contribute to the development, maintenance, and enhancement of web-based applications, databases, and data processing tools on advanced aircraft programs.

As a member of the DASH software team, you will be involved in the full software development lifecycle, collaborating with cross-functional teams and users to deliver impactful solutions that improve operational efficiency and fleet sustainment. This position offers the opportunity to apply strong system thinking, coordinate complex work, and demonstrate leadership skills in a fast-paced, mission-critical environment.

At Boeing, we innovate and collaborate to make the world a better place. We're committed to fostering an environment for every teammate that is welcoming, respectful, and inclusive, with great opportunities for professional growth. Find your future with us.

Our teams are currently hiring for a broad range of experience levels including Experienced or Senior Engineers.
Position Responsibilities:

  • Design, develop, test, and maintain full stack software solutions that support model based sustainment simulations

  • Collaborate with users and stakeholders to gather requirements and translate them into scalable, maintainable software systems

  • Coordinate complex development efforts across multiple teams and disciplines, ensuring alignment with program objectives

  • Lead or contribute to project planning, code reviews, and agile development processes

  • Troubleshoot, debug, and resolve software issues to ensure reliability and performance

  • Continuously improving software processes, tools, and documentation to enhance team productivity and product quality

  • Apply strong system-level thinking to integrate software components effectively within the broader operational environment

  • Mentor junior engineers and contribute to knowledge sharing within the team

This position is expected to be 100% onsite. The selected candidate will be required to work onsite at one of the listed location options.

Basic Qualifications (Required Skills/Experience):

  • Bachelor's Degree

  • Ability to obtain a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship

  • 5+ years of experience in full stack software development

Preferred Qualifications (Desired Skills/Experience):

  • Level 3: Bachelor of Science degree from an accredited course of study in engineering, engineering technology (includes manufacturing engineering technology), chemistry, physics, mathematics, data science, or computer science and 5+ years of related work experience OR Bachelor's Degree and 9+ years of directly related work experience OR 13+ years of related, relevant experience

  • Level 4: Bachelor of Science degree from an accredited course of study in engineering, engineering technology (includes manufacturing engineering technology), chemistry, physics, mathematics, data science, or computer science and 9+ years of related work experience OR Bachelor's Degree and 13+ years of directly related work experience OR 17+ years of related, relevant experience

  • 3+ years of experience supporting multiple programs and functions

  • 1+ years of experience with mission/safety-critical software development

  • 1+ years of experience working in aerospace, defense, or similar high-tech industry

  • Strong problem-solving skills and ability to deliver practical, effective solutions

  • Excellent communication and collaboration skills

  • Experience working in an agile development environment

  • Proven leadership or project coordination experience

  • Familiarity with software development best practices, including code reviews, testing, and continuous integration

CodeVue Coding Challenge:

To be considered for this position you will be required to complete a technical assessment as part of the selection process. Failure to complete the assessment will remove you from consideration

Drug Free Workplace:

Boeing is a Drug Free Workplace where post offer applicants and employees are subject to testing for marijuana, cocaine, opioids, amphetamines, PCP, and alcohol when criteria is met as outlined in our policies.

Pay & Benefits:

At Boeing, we strive to deliver a Total Rewards package that will attract, engage and retain the top talent. Elements of the Total Rewards package include competitive base pay and variable compensation opportunities.

The Boeing Company also provides eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance programs, and a number of programs that provide for both paid and unpaid time away from work.

The specific programs and options available to any given employee may vary depending on eligibility factors such as geographic location, date of hire, and the applicability of collective bargaining agreements.

Pay is based upon candidate experience and qualifications, as well as market and business considerations.

Summary Pay Range for Experienced (level 3): $126,650 - $171,350

Summary Pay Range for Senior (level 4): $160,650 - $217,350

Potential signing bonus for eligible/qualified external candidates.

Language Requirements:

Not Applicable

Education:

Bachelor's Degree or Equivalent

Relocation:

This position offers relocation based on candidate eligibility.

Export Control Requirement:

This position must meet U.S. export control compliance requirements. To meet U.S. export control compliance requirements, a "U.S. Person" as defined by 22 C.F.R. 120.62 is required. "U.S. Person" includes U.S. Citizen, U.S. National, lawful permanent resident, refugee, or asylee.

Safety Sensitive:

This is not a Safety Sensitive Position.

Security Clearance:

This position requires the ability to obtain a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship. An interim and/or final U.S. Secret Clearance Post-Start is required.

Visa Sponsorship:

Employer will not sponsor applicants for employment visa status.

Contingent Upon Award Program

This position is not contingent upon program award

Shift:

Shift 1 (United States of America)

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Boeing is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, national origin, gender, sexual orientation, gender identity, age, physical or mental disability, genetic factors, military/veteran status or other characteristics protected by law.

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