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

Kelly Services

Engineer I

Saint Louis, MO

Louis, MO 9-12 Months Contract- Possibly of extension Full-Benefits- Great Role for an Entry-Level Engineer Role and Responsibilities The engineer will be a technical resource and project team member ...

MasterCard

Software Engineer II

O Fallon, MO

$91K - $124K/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.

MasterCard

Software Engineer II

O Fallon, MO · On-site

$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.

Mastercard, Inc.

Software Engineer II

O Fallon, MO · On-site

$91K - $124K/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 ...

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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 Jun 15, 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 L1, L2, L3, and L4 developer?

In the context of entry-level developers, L1, L2, L3, and L4 typically refer to different levels of experience and responsibility within a company's technical hierarchy. L1 is usually an entry-level or junior developer, L2 and L3 are mid-level roles with increasing expertise, and L4 often signifies senior or lead developers. These levels help define expectations for skills, problem-solving, and project responsibilities in a development team.

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 are entry level developers?

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.

Will AI replace coders by 2040?

Entry level developers will continue to play a vital role in software development, as AI tools are designed to assist rather than fully replace human programmers. While AI can automate routine coding tasks, skills such as problem-solving, creativity, and understanding user needs remain essential for developers. Staying updated with programming languages and tools will help new developers adapt to evolving technology.

How do I get a developer job with no experience?

Entry-level developer positions often require demonstrating foundational programming skills through personal projects, coding bootcamps, or online courses. Building a portfolio, learning relevant tools like Git, and gaining certifications can improve your chances despite limited work experience.

Can I make 200k a year as a software engineer?

Entry level developers typically do not earn $200,000 annually; such salaries are usually associated with senior roles, specialized skills, or work in high-cost living areas. Factors like experience, expertise in in-demand technologies, and company size influence earning potential. Most entry level positions start with lower salaries, but with experience and skill development, higher compensation is achievable over time.
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
Engineer I

Engineer I

Kelly Services

Saint Louis, MO

Full-time

Medical, Dental, Vision, Life, Retirement

Posted 19 days ago

Job description

Engineer I

St. Louis, MO

9-12 Months Contract- Possibly of extension

Full-Benefits- Great Role for an Entry-Level Engineer

Role and Responsibilities

The engineer will be a technical resource and project team member for the Packs Transfer Team.

  • Provide CAD design and engineering to assist in documentation changes needed for the Packs transfer project.
  • Key functions will include drawing changes & bill of material changes to support the packs transfer.
  • Will work closely with the artwork department for guidance on artwork changes needed.

Will be interfacing with internal and external customers.

  1. Ability to communicate changes to external suppliers.
  2. Participate in the change review process and part approval process.

Qualifications and Education Requirements

  • Bachelor’s degree in engineering or equivalent
  • 1-2 years’ experience in engineering

Preferred Skills

  • Solid Works proficient
  • Microsoft suite proficient

As part of our promise to talent, Kelly supports those who work with us through a variety of benefits, perks, and work-related resources. Kelly offers eligible employees voluntary benefit plans including medical, dental, vision, telemedicine, term life, whole life, accident insurance, critical illness, a legal plan, and short-term disability. As a Kelly employee, you will have access to a retirement savings plan, service bonus and holiday pay plans (earn up to eight paid holidays per benefit year), and a transit spending account. In addition, employees are entitled to earn paid sick leave under the applicable state or local plan. Click here for more information on benefits and perks that may be available to you as a member of the Kelly Talent Community.

Why Kelly® Engineering?

Your engineering skills are in demand, but how do you find the right fit? Easy. At Kelly Engineering, our team creates expert talent solutions to solve the world’s most critical challenges. We connect you with leading organizations where you can collaborate on innovative projects, work with cutting-edge technologies and accelerate your growth. Whether you prefer the variety and flexibility of short-term projects or are looking for a long-term opportunity, we’re here to guide you to the next step in your engineering career.

About Kelly

Work changes everything. And at Kelly, we’re obsessed with where it can take you. To us, it’s about more than simply accepting your next job opportunity. It’s the fuel that powers every next step of your life. It’s the ripple effect that changes and improves everything for your family, your community, and the world. Which is why, here at Kelly, we are dedicated to providing you with limitless opportunities to enrich your life-just ask the 300,000 people we employ each year.
Kelly is committed to providing equal employment opportunities to all qualified employees and applicants regardless of race, color, sex, sexual orientation, gender identity, religion, national origin, disability, veteran status, age, marital status, pregnancy, genetic information, or any other legally protected status, and we take affirmative action to recruit, employ, and advance qualified individuals with disabilities and protected veterans in the workforce. Requests for accommodation related to our application process can be directed to the Kelly Human Resource Knowledge Center. Kelly complies with the requirements of California’s state and local Fair Chance laws. A conviction does not automatically bar individuals from employment. Kelly participates in E-Verify and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S.
Kelly may use AI-powered tools during the recruitment and hiring process. For full details, including how Kelly uses AI, your rights, and how to request a reasonable accommodation, visit the Recruitment Artificial Intelligence Notice.

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