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Entry Level Software Developer Jobs in O Fallon, MO

Maritz

Software Engineer I

Fenton, MO · On-site

The Software Engineer I supports the development of software that serves Maritz technology, working ... What You'll Be Doing We are looking for an entry level engineer who is eager to learn and build ...

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.

Mastercard, Inc.

Software Engineer II

O Fallon, MO · On-site

$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 ...

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All JobsSoftware Developer JobsEntry Level Software Developer JobsEntry Level Software Developer Jobs in O'Fallon, MO

Entry Level Software Developer information

See O Fallon, MO salary details

$27.6K

$93.8K

$225.8K

How much do entry level software developer jobs pay per year?

As of Jul 27, 2026, the average yearly pay for entry level software 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 Does an Entry-Level Software Developer Do?

An entry-level software developer has simpler duties compared to more senior members of the field. At the entry level, your responsibilities are to create simple, single-thread code to achieve a specific task. These bits of code can be combined to create a larger program. You may also have to create or write a design algorithm by which you create software. However, most of the time, as an entry-level developer, you are in charge of debugging. You have to comb through the code of a piece of software to remove errors.

How to get a software developer job with no experience?

Entry-level software developer positions often require demonstrating programming skills through personal projects, internships, or coding bootcamps. Building a portfolio with projects in languages like Python, Java, or JavaScript and gaining familiarity with tools like Git can improve chances; certifications can also help validate skills for employers.

What types of projects and tasks can I expect to work on as an entry level software developer?

As an entry level software developer, you will typically be assigned to work on smaller modules or features within larger projects, often under the guidance of more experienced developers. Your daily tasks may include writing and testing code, fixing bugs, participating in code reviews, and collaborating with team members through agile sprints or regular meetings. You'll also have opportunities to learn new technologies, contribute to documentation, and gradually take on more complex responsibilities as you gain experience. This environment encourages continuous learning and close collaboration with others, helping you build both technical and teamwork skills.

Will AI replace developers in 2026?

Entry level software developers will continue to play a vital role in software creation, as AI tools are designed to assist rather than fully replace human programmers. Developing skills in coding, problem-solving, and understanding AI integration will remain valuable in the evolving tech environment. AI can automate repetitive tasks, but human oversight and creativity are essential for complex software development.

Is 30 too late to become a software developer?

Entry level software developer roles are open to individuals of all ages, and many successful developers start their careers later in life. Learning programming languages, gaining relevant skills through coding projects or certifications, and building a portfolio are key steps regardless of age.

What are entry level software developers?

Entry level software developers are professionals who are at the beginning of their software development careers. They typically have foundational knowledge of programming languages, software development methodologies, and problem-solving skills. Entry level developers work under the guidance of more experienced engineers to write code, fix bugs, and contribute to software projects. Their responsibilities often include learning new technologies, collaborating with team members, and gaining practical experience to advance in their careers.

What are the key skills and qualifications needed to thrive as an Entry Level Software Developer, and why are they important?

To thrive as an Entry Level Software Developer, you need a solid understanding of programming languages such as Java, Python, or C++, along with a relevant degree or coding bootcamp experience. Familiarity with version control systems like Git, integrated development environments (IDEs), and basic knowledge of databases is important. Strong problem-solving abilities, attention to detail, and effective teamwork set standout candidates apart. These skills and qualities are crucial for building reliable software, collaborating with colleagues, and adapting to evolving technical requirements.

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

AspectEntry Level Software DeveloperJunior Software Engineer
Required CredentialsBachelor's in CS or related field, coding bootcamp experienceBachelor's in CS or related field, internship experience
Work EnvironmentTech companies, startups, software firmsTech companies, consulting firms, startups
Employer UsageCommonly used in job postings and industryOften used interchangeably with Entry Level Software Developer

Both roles typically require a bachelor's degree in computer science or related fields and some coding experience. They work in similar environments like tech companies and startups. The terms are often used interchangeably, but 'Junior Software Engineer' may emphasize a slightly more engineering-focused role. Overall, they represent entry-level positions for aspiring software professionals.

What engineer makes $500,000 a year?

While most entry-level software developers earn significantly less, highly experienced software engineers working in specialized fields such as quantitative trading, high-frequency trading, or senior roles at major tech companies can reach or exceed $500,000 annually, often including bonuses and stock options. These roles typically require advanced skills, extensive experience, and often involve working with complex systems or financial markets.
More about Entry Level Software Developer jobs
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What job categories do people searching Entry Level Software Developer jobs in O'Fallon, MO look for? The top searched job categories for Entry Level Software Developer jobs in O'Fallon, MO are:
What cities near O'Fallon, MO are hiring for Entry Level Software Developer jobs? Cities near O'Fallon, MO with the most Entry Level Software Developer job openings:
Entry Level Software Developer jobs near you
Infographic showing various Entry Level Software Developer job openings in O'Fallon, MO as of July 2026, with employment types broken down into 100% Full Time. Highlights an 93% In-person, and 7% Hybrid job distribution, with an average salary of $93,755 per year, or $45.1 per hour.

Entry-Level Connector Developer

Nomad eCommerce

Saint Louis, MO

$20 - $35/hr

Part-time

Posted 12 days ago

Job description

Entry-Level Connector Developer

About Nomad

At Nomad eCommerce, we build ecommerce solutions that connect online stores with the business systems our customers rely on every day. As an Entry-Level Connector Developer, you'll help create and maintain the integrations that allow orders, inventory, pricing, customers, and other critical business data to flow seamlessly between ecommerce platforms and ERP systems.


This is an excellent opportunity for a recent graduate or early-career developer looking to build a career in software engineering. You'll receive hands-on mentoring while working alongside experienced developers and project managers on real client implementations.


Every project is different, offering opportunities to solve technical challenges, expand your development skills, and gain exposure to enterprise software used by manufacturers, distributors, and wholesalers around the world.


What You'll Do

  • Develop and maintain software connectors using C# and .NET.
  • Build and troubleshoot REST API integrations.
  • Write SQL queries to retrieve and validate data.
  • Assist with mapping and transforming data between JSON, XML, CSV, and database formats.
  • Test integrations using Postman and internal tools.
  • Troubleshoot integration issues and assist with resolving production support tickets.
  • Work closely with developers, ERP consultants, and project managers to deliver customer solutions.
  • Document integration processes and technical solutions.
  • Participate in code reviews, team meetings, and continuous learning opportunities.
  • Continue developing technical knowledge through mentoring and hands-on project experience.
  • Other duties may be assigned to meet business needs


What We're Looking For

We're looking for someone who enjoys solving problems, likes working with data, and wants to grow as a software developer.


Required Qualifications

  • Bachelor's degree in Computer Science, Software Engineering, Information Systems, or a related field (or equivalent experience).
  • Experience programming in C#, Java, JavaScript, Python, or another object-oriented language.
  • Basic understanding of SQL and relational databases.
  • Familiarity with REST APIs.
  • Understanding of JSON and XML.
  • Strong analytical and problem-solving skills.
  • Strong communication skills.
  • Attention to detail.
  • Ability to learn new technologies quickly.
  • Ability to manage multiple tasks and priorities.


Nice to Have

  • Personal, academic, or internship projects involving APIs.
  • Experience with Git or GitHub.
  • Experience using Postman.
  • Exposure to .NET development.
  • Exposure to ERP or ecommerce systems.
  • Understanding of software debugging techniques.
  • Experience with Azure DevOps or CI/CD pipelines.
  • Knowledge of HTML, CSS, or JavaScript.


Why Join Nomad?

At Nomad, building strong relationships with our team members is central to our culture. We believe in investing in people who are eager to learn, collaborate, and grow.

You'll work on real-world software projects that directly impact our customers while receiving mentorship from experienced engineers. If you're looking for a place where you can build your technical skills, contribute meaningful work, and grow your career, we'd love to hear from you.


Communication Disclaimer
All official communications regarding this position will only come from one of the following:

  • notifications@app.bamboohr.com
  • Any email address ending in @nomadecommerce.com

If you receive communication about this position from any other source, please disregard it as it is not authorized by Nomad eCommerce.

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