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Software Developer Contract Jobs in O Fallon, IL

LRS

Senior Software Engineer

Saint Louis, MO · On-site

$60 - $70/hr

This contract-to-hire opportunity offers the chance to design, develop, and support enterprise ... Experience with Azure DevOps, including source control, build and release pipelines, automated ...

Booz Allen Hamilton

Agentic AI Developer

O Fallon, IL · On-site

$99K - $225K/yr

Experience with software design patterns * Knowledge of embedding models, vector databases, and ... as well as contract-specific affordability and organizational requirements. The projected ...

CACI

Junior Software Engineer

Saint Louis, MO · On-site

$69K - $141K/yr

Job Title: Junior Software Engineer Job Category: Engineering Time Type: Full time Minimum ... and contract wage rates, relevant prior work experience, specific skills and competencies ...

Cognizant Technologies

C++ developer

Saint Louis, MO · On-site

$47.75 - $64.25/hr

Louis, MO Duration: 6+ Months Contract ONLY EAD GC, GC OR USC. Qualifications We are seeking C/C++ developers with Telecom experience. 3+ yrs C/C++ experience Software Documentation experience ...

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All JobsSoftware Developer Contract JobsSoftware Developer Contract Jobs in O'Fallon, IL

Software Developer Contract information

See O Fallon, IL salary details

$44.8K

$104.3K

$154.8K

How much do software developer contract jobs pay per year?

As of Sep 6, 2026, the average yearly pay for software developer contract in O'Fallon, IL is $104,330.00, according to ZipRecruiter salary data. Most workers in this role earn between $84,000.00 and $121,300.00 per year, depending on experience, location, and employer.

What is a software developer contract?

A Software Developer Contract job is a temporary or project-based position where a developer is hired for a specific duration, typically through a contract agreement. Contractors may work independently, for an agency, or directly with a company to develop, test, and maintain software applications. These roles often offer flexibility but may not include benefits like health insurance or paid time off. Contract developers are usually paid hourly or per project and may work remotely or on-site depending on the employer's needs.

What are the key skills and qualifications needed to thrive as a software developer contract?

A successful Software Developer Contract requires strong programming abilities, solid knowledge of software development methodologies, and relevant project or domain expertise, often supported by a degree in computer science or a related field. Familiarity with languages like Java, Python, or JavaScript, as well as tools such as Git, Agile frameworks, and certification in areas like AWS or Scrum, is highly valued. Excellent problem-solving skills, adaptability, effective communication, and an ability to quickly integrate into new teams are crucial soft skills. These competencies enable contract developers to deliver high-quality solutions while efficiently navigating diverse projects and rapidly changing work environments.

What are the typical work arrangements and expectations for contract software developers?

Contract Software Developers are usually hired for specific projects or defined timeframes, which can range from several weeks to multiple months, often working remotely or on-site depending on client needs. They are expected to quickly understand project requirements, deliver code efficiently, and collaborate with both in-house teams and other contractors, maintaining flexibility to adapt to different workflows and tools. Because contract roles may not include the same onboarding experience as permanent positions, self-motivation and strong independent work habits are important. This work arrangement provides valuable exposure to various industries and technologies, often expanding a developer’s professional network and enhancing career versatility.

Are software developers still in high demand?

Yes, software developers remain in high demand due to ongoing digital transformation across industries, the need for new applications, and the growth of cloud computing and cybersecurity. Strong programming skills in languages like Java, Python, or JavaScript, along with experience in agile environments, enhance job prospects for contract software developers.

How much do contract software developers make?

Contract software developers typically earn between $50 and $150 per hour, depending on experience, location, and project complexity. Rates can vary based on skills such as proficiency in specific programming languages, frameworks, and the duration of the contract.

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 Software Developer Contract jobs in O'Fallon, IL?

For Software Developer Contract jobs in O'Fallon, IL, the most frequently searched job titles are:

What cities near O'Fallon, IL are hiring for Software Developer Contract jobs?

Cities near O'Fallon, IL with the most Software Developer Contract job openings:

Software Developer Contract jobs near you
Infographic showing various Software Developer Contract job openings in O'Fallon, IL as of August 2026, with employment types broken down into 74% Full Time, and 26% Contract. Highlights an 100% In-person job distribution, with an average salary of $104,330 per year, or $50.2 per hour.

Embedded Software Engineer Intern

Leonardo DRS

Bridgeton, MO • On-site

$41K - $53K/yr

Full-time, Internship

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 2 hours ago

Leonardo DRS rating

8.2

Company rating: 8.2 out of 10

Based on 57 frontline employees who took The Breakroom Quiz

86th of 545 rated manufacturers

Job description

Job ID: 115031 

The Leonardo DRS Land Systems business is a recognized leader in the design and integration of complex technologies into new and legacy systems and platforms for global military and commercial customers. We are a 6 year running Top Workplace in the Greater St. Louis area.  

Job Summary

Leonardo DRS Land Systems is seeking an Embedded Software Engineer Intern for Summer 2026 to help our Software Engineering (SW) team meet the technical performance requirements on complex system development programs.  This position will be working on a variety of programs and writing (C,C++,C#, Java and Python) software that runs on the hardware we develop.  The position will also execute an interdisciplinary process to ensure that the customer and stakeholder needs and requirements are satisfied in a high quality, trustworthy, cost efficient, and schedule compliant manner.  The purpose of the internship is to provide meaningful professional hands-on experience to students with proven academic performance and leadership potential.  Students will also get to utilize our companies flexible work schedule.   

Job Responsibilities
  • Work under the direction of the Software Engineering Manager, Software Engineering Technical Director, and Lead Software Engineers on various Software Engineering activities
  • May code using C/C++/C#/Java to complete coding assignments
  • Source code management of new and/or modified code
  • May use MATLAB and/or Simulink software in the performance of assignments
  • Work closely with and assist engineers in the conduct of various engineering assignments
  • Carry out basic work instructions that will help in understanding the fundamentals of the Company and also learn new things
  • Conduct limited scope testing under the supervision of engineers
  • Complete assigned tasks on time
  • Gather and assemble data for engineers
  • May be required to help in research in a particular field
  • Conduct design analysis and/or calculations under the supervision of engineers
  • Assist engineers with appropriate design details
  • Must have good interpersonal skills and have the ability to build a good network
  • Perform a wide variety of tasks to gain familiarity with the engineering staff, methods, programs and practices
  • Support, communicate, reinforce and defend the mission, values and culture of the organization
  • Other duties as assigned
Qualifications
  • High School Diploma or GED, and currently a Junior or above in a Bachelor's program in Computer Science, Computer Engineering, Mathematics, Physics, or equivalent
  • Must have good interpersonal skills
  • Excellent analytical and communication skills, written and oral

Desired Knowledge:

  • Basic knowledge and familiarity with: C, C++, C#, Java, Python, git
  • Knowledge of Windows, Linux, or a real time operating system
  • Proficient use of Microsoft Office products

The salary range for this position is $41,011.00/year- $53,315.00/year for the state of Illinois.  This range reflects the good faith estimate of pay the employer is willing to offer at the time of posting. Several factors can influence the pay scale, including but not limited to: Federal contract labor categories and contract wage rates, collective bargaining agreements, geographic location, business considerations, scope, and responsibilities of the position, local or other applicable market conditions, and internal equity. Other factors include the candidate's qualifications such as prior work experience, specific skills and competencies, education/training, and certifications. In addition to base pay, employees may be eligible for: annual performance-based bonuses, equity awards, and overtime pay (for non-exempt employees as applicable. Our benefits package includes comprehensive health insurance (medical, dental, vision), employer matching 401(k) retirement plan, paid time off including vacation, holidays, and sick leave (including ant state-mandated paid sick leave), parental leave benefits, tuition reimbursement, professional development support, and life and disability insurance coverage.

Taking care of our people is a top priority at Leonardo DRS. We are proud to offer competitive salaries and comprehensive benefits, including medical, dental, and vision coverage, a company contribution to a health savings account, telemedicine, life and disability insurance, legal insurance, and a 401(k) savings plan. We champion wellness programs that focus on physical, emotional, and financial well-being. We develop our talent by offering programs and activities to support career-growth, professional development, and skill enhancement. And we understand there is more to life than work, and the importance of offering flexible work schedules with our 9/80 program, competitive vacation, health/emergency leave, paid parental leave, and community service hours. 
*Some employees are eligible for limited benefits only

Leonardo DRS, Inc. and its subsidiaries provide equal opportunities to all employees and applicants for employment and prohibit discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, protected veteran status, or any other characteristic protected by federal, state, or local laws. #LSY

What Leonardo DRS employees say

Pay

Benefits

Hours and flexibility

Workplace

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About Leonardo DRS

Sourced by ZipRecruiter

Industry

Navigational, measuring, electromedical, and control instruments manufacturing and communications equipment manufacturing

Company size

5,001 - 10,000 Employees

Headquarters location

Arlington, VA, US

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