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Entry Level Developer Jobs in O Fallon, MO (NOW HIRING)

Nooter/Eriksen

Internship Application - Summer 2027

Fenton, MO · On-site

$14.25 - $18.50/hr

... entry-level engineers to get integrated with the cultureTop Golf event with entry-level engineersPaid holidays (Memorial Day, Juneteenth, 4th of July)½ day Virtual Fridays, working from homeThe ...

Mastercard, Inc.

$92K - $147K/yr

A Software Engineer II is an early-career or entry-level engineer who contributes to the design, development, testing, and maintenance of software solutions under the guidance of more senior ...

MasterCard

Software Engineer II

O Fallon, MO

$92K - $147K/yr

A Software Engineer II is an earlycareer or entrylevel engineer who contributes to the design, development, testing, and maintenance of software solutions under the guidance of more senior engineers.

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All JobsDeveloper JobsEntry Level Developer JobsEntry Level Developer Jobs in O'Fallon, MO

Entry Level Developer information

See O Fallon, MO salary details

$27.6K

$93.8K

$225.8K

How much do entry level developer jobs pay per year?

As of Aug 7, 2026, the average yearly pay for entry level developer in O'Fallon, MO is $93,755.00, according to ZipRecruiter salary data. Most workers in this role earn between $59,400.00 and $99,100.00 per year, depending on experience, location, and employer.

What is the difference between Entry Level Developer vs Junior Software Engineer?

AspectEntry Level DeveloperJunior Software Engineer
Required CredentialsAssociate degree or coding bootcamp certificationSimilar; often an associate degree or equivalent experience
Work EnvironmentEntry-level projects, supervised tasksCollaborative team settings, basic coding tasks
Employer & Industry UsageTech companies, startups, IT departmentsSoftware firms, tech departments, consulting firms
Common Search & ComparisonYesYes

Both roles typically require similar foundational skills and certifications, with slight differences in job responsibilities. Entry Level Developers focus on learning and supporting projects, while Junior Software Engineers often have more technical responsibilities. The terms are often used interchangeably, but understanding these nuances helps in job search and career planning.

What are the key skills and qualifications needed to thrive as an entry level developer, and why are they important?

To thrive as an Entry Level Developer, you need a solid understanding of programming languages (such as Java, Python, or JavaScript), problem-solving abilities, and a relevant degree or coding bootcamp certification. Familiarity with version control systems like Git, basic knowledge of databases, and exposure to development environments or frameworks are typically required. Strong communication, teamwork, and a willingness to learn new technologies help set candidates apart. These skills and qualities are essential for contributing effectively to projects, adapting to evolving technical requirements, and collaborating within development teams.

What are some common challenges faced by entry level developers during their first year on the job?

Entry level developers often encounter challenges such as adapting to new codebases, learning company-specific development workflows, and collaborating effectively with more experienced team members. Balancing the need to ask questions with the desire to solve problems independently can also be tricky. Additionally, keeping up with frequent technology updates and understanding project requirements thoroughly are important hurdles. Most organizations offer mentorship, code reviews, and regular feedback to help new developers overcome these challenges and grow their skills quickly.

What does an entry level developer do?

As an entry-level developer, your duties are to work as part of a team to develop a piece of software or an application for a computer or web browser. Your responsibilities vary depending on your specific assignment. As an entry-level developer, you may assist in multiple aspects of the project while you determine a more specific career path. Your duties include working with QA testers to troubleshoot bugs in your programs, programming specific portions of the app or software, and collaborating with programmers, developers, and other technical professionals to understand and clarify the goals of the application.

What is an entry level developer?

Entry level developers are individuals who are starting their careers in software development, typically with less than two years of professional experience. They are responsible for writing, testing, and maintaining code under the guidance of more experienced developers. Entry level developers often work on basic coding tasks, bug fixes, and learning new technologies as part of a development team. Their role is crucial for gaining practical experience and building foundational skills needed for advancement in the tech industry.
More about Entry Level Developer jobs
What are the most commonly searched types of Developer jobs in O'Fallon, MO? The most popular types of Developer jobs in O'Fallon, MO are:
What are popular job titles related to Entry Level Developer jobs in O'Fallon, MO? For Entry Level Developer jobs in O'Fallon, MO, the most frequently searched job titles are:
What cities near O'Fallon, MO are hiring for Entry Level Developer jobs? Cities near O'Fallon, MO with the most Entry Level Developer job openings:
Entry Level Developer jobs near you
Infographic showing various Entry Level Developer job openings in O'Fallon, MO as of July 2026, with employment types broken down into 78% Full Time, 9% Part Time, and 13% Contract. Highlights an 81% Physical, 4% Hybrid, and 15% Remote job distribution, with an average salary of $93,755 per year, or $45.1 per hour.

Entry-Level Software Engineer - Maryland Heights, MO

Veteran Jobs - 2023 Mar 01 - Veterans Resources

Maryland Heights, MO • On-site

Full-time

Posted 12 hours ago

Posted today

Job description

ATTENTION MILITARY AFFILIATED JOB SEEKERS - Our organization works with partner companies to source qualified talent for their open roles. The following position is available to Veterans, Transitioning Military, National Guard and Reserve Members, Military Spouses, Wounded Warriors, and their Caregivers. If you have the required skill set, education requirements, and experience, please click the submit button and follow the next steps.
Unless specifically stated otherwise, this role is On-Site at the location detailed in the job post.
Job Description
At Boeing, we innovate and collaborate to make the world a better place. We're committed to fostering an environment for every teammate that's welcoming, respectful and inclusive, with great opportunity for professional growth. Find your future with us.
Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost-effective information technology and business intelligence solutions. With a dedicated team of approximately 500 professionals, we proudly serve 75 defense, commercial, and government clients across more than 50 U.S. locations and 9 countries worldwide.
As a trusted partner, our employees embody our core values by consistently delivering excellence, taking full ownership, and developing innovative solutions that enable critical missions and ensure the safety of our global customers and team members. Joining Tapestry Solutions means enjoying the best of both worlds: access to the vast resources of Boeing combined with the agility and people-focused, family-oriented culture of a small business where your contributions truly matter.
Tapestry Solutions, a part of Boeing Global Services (BGS), is seeking an Entry-Level Software Engineer in Maryland Heights, MO and/or Hazelwood, MO.In this role you will test software for the F-15 Mission Planning systems.
Position Responsibilities:
With general supervision, develops, documents, maintains and unit tests code by utilizing software development environments and programming languages (C#, Javascript, SQL)
Develops, documents and maintains software design by applying established methods and practices.
Performs troubleshooting of defects
Collaborate with others to propose solutions to problems
Integrates and compiles software components into builds. May test limited component level software in the target environment
Performs other duties as assigned

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