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Software Developer Internship Jobs in Belleville, IL

Maritz

Software Engineer I

Fenton, MO · On-site

The Software Engineer I supports the development of software that serves Maritz technology, working ... experience; internships, co-ops, and academic or personal projects will be considered. Cloud ...

Solutions AEC LLC

Electrical Intern

Saint Louis, MO · On-site

$18 - $20/hr

Electrical Engineering Internship About Us: At Solutions AEC, we're a design-build engineering firm ... Utilizing design software (Revit and others) to produce electrical drawings * Supporting the ...

Sargent & Lundy

Civil Engineer - Mid-Level

Clayton, MO · On-site

$69K - $99K/yr

Related engineering internship or co-op work experience. * Successful completion of the ... Software Engineering, or related fields that helps you apply automation or agentic AI to real ...

Sargent & Lundy

Civil Engineer - Mid-Level

Clayton, MO · Hybrid

$69K - $99K/yr

Related engineering internship or co-op work experience. * Successful completion of the ... Software Engineering, or related fields that helps you apply automation or agentic AI to real ...

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All JobsSoftware Developer JobsSoftware Developer Internship JobsSoftware Developer Internship Jobs in Belleville, IL

Software Developer Internship information

See Belleville, IL salary details

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How much do software developer internship jobs pay per hour?

As of Aug 7, 2026, the average hourly pay for software developer internship in Belleville, IL is $22.24, according to ZipRecruiter salary data. Most workers in this role earn between $17.98 and $23.56 per hour, depending on experience, location, and employer.

What is a software developer internship?

A Software Developer Internship is a temporary position designed for students or recent graduates to gain hands-on experience in software development. Interns work alongside experienced developers to assist in coding, debugging, testing, and sometimes designing software solutions. The role helps interns improve their programming skills, understand software development workflows, and gain exposure to industry tools and practices. Many internships also offer mentorship and networking opportunities, which can lead to full-time positions after graduation.

What types of projects or assignments can I expect as a software developer intern?

As a Software Developer Intern, you'll typically work on real-world projects that support the ongoing development goals of your team, such as building features, fixing bugs, or participating in code reviews. Many internships involve collaborating with full-time developers, attending daily stand-ups, and sometimes contributing to documentation or testing efforts. This hands-on experience not only helps you apply classroom knowledge but also exposes you to agile development methodologies and workplace best practices. You'll have the opportunity to make impactful contributions while learning from experienced mentors and peers.

What are the key skills and qualifications needed to thrive in a software developer internship, and why are they important?

To thrive as a Software Developer Intern, you need a foundational understanding of programming languages such as Python, Java, or C++, typically supported by relevant coursework or coding projects. Familiarity with version control tools like Git, basic software development frameworks, and participation in coding bootcamps or certifications is advantageous. Strong problem-solving ability, eagerness to learn, and effective communication skills set top candidates apart. These skills and qualities enable interns to effectively contribute to projects, collaborate with teams, and adapt quickly to professional development environments.

What are the most commonly searched types of Software Developer jobs in Belleville, IL? The most popular types of Software Developer jobs in Belleville, IL are:
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Software Developer Internship jobs near you
Infographic showing various Software Developer Internship job openings in Belleville, IL as of August 2026, with employment types broken down into 86% Full Time, and 14% Part Time. Highlights an 93% In-person, and 7% Remote job distribution, with an average salary of $46,254 per year, or $22.2 per hour.

Software Engineer I

Maritz

Fenton, MO • On-site

Other

Medical, Dental, Vision, Life, Retirement, PTO

Posted 27 days ago

Job description

Where Human Connection Fuels Possibility

At Maritz, decades of innovation and perseverance have built more than just a strong reputation - they've shaped a culture where human connection and collaboration are at the heart of everything we do.

Joining Maritz means becoming part of a workplace grounded in a critical truth; people and their potential is our greatest resource.

Maritz helps companies achieve their business goals by inspiring people to perform their best. We design experiences, incentives, and recognition programs that spark action and deliver measurable impact.

And we've brought this human-first design inward - intentionally building teams that care for each other and collaborate powerfully. In our most recent employee survey, nearly 90% of respondents said that their managers care about their concerns and 82% said they feel genuinely appreciated. We know that when employees feel seen, supported, and celebrated for who they are, they thrive and so does our business.

That's why we've created a flexible, environment that empowers you to do your best work without sacrificing what matters most to you. In fact, in that same survey, nearly 90% of respondents said they have the flexibility they need to balance work and personal life and nearly 80% said Maritz does a great job prioritizing employee well being.

We have a passion for excellence and genuine care for the people making it possible.

We are building a cloud-native, AI-forward technology organization. The Software Engineer I supports the development of software that serves Maritz technology, working closely with and under the guidance of fellow engineers on the team. In this role, you will help build and maintain application features and services, with growing exposure to AI-assisted engineering practices.

What You'll Be Doing

We are looking for an entry level engineer who is eager to learn and build strong technical foundations. You will work alongside senior engineers across codebases, cloud platforms, and engineering toolchains, contributing to project execution under guidance. The ideal candidate brings foundational knowledge in systems or software engineering and curiosity toward emerging technologies, including AI-driven tooling.

80% - Software Engineering Project Support

  • Performs routine to moderately complex development work across a variety of environments, with support from senior engineers on more complex or nonroutine tasks.

  • Uses AI-assisted coding tools (e.g., GitHub Copilot, Claude) to accelerate development and improve code quality and throughput.

  • Participates in code reviews of peers' work - including AI-generated code - to help ensure quality, security, and adherence to standards.

  • Actively participates in and helps facilitate Agile ceremonies (sprint planning, stand-ups, retrospectives).

  • Seeks guidance from senior engineers on effective, responsible adoption of AI-assisted development tools.

  • Supports efforts to apply AI and automation to improve deployment frequency and increase system reliability.

20% - Problem Solving & Operational Reliability

  • Assists withresolvingservice interruptions and contributes to root cause analysis during post-mortems under the guidance of senior engineers.

  • Helps identify trends, anomalies, and failure patterns; recommends solutions with input from senior team members.

  • Actively participates in a culture of continuous improvement, learning, and operational excellence within the team.

  • Supports cross-functional teams during major incidents, helping ensure clear communication and timely updates throughout the lifecycle of an event.

What You'll Bring

  • Bachelor's degree in a technology-related field, or equivalent practical experience demonstrating the required skills.1-2 years of relevant experience; internships, co-ops, and academic or personal projects will be considered. Cloud platform, or AI-related certifications are a plus.

  • Foundational knowledge of web application frameworks, object-oriented languages, functional programming techniques, design patterns, and secure coding practices, gained through coursework, internships, or professional experience.

  • Exposure to building web applications or web-services, preferably REST

  • Basic familiarity with relational and/or NoSQL databases and core concepts such as ACID transactions, data retrieval, search, and persistence paradigms.

  • Developing triage skills, with the ability to assist in root cause analysis under guidance.

  • Basic exposure to at least one major cloud platform (AWS, GCP, or OCI).

  • Growing ability to interpret and apply security requirements across infrastructure and software systems.

  • Experience using AI-assisted development tools (e.g., GitHub Copilot, Claude) to generate, review, and improve code.

  • Growing ability to evaluate AI-generated code and configurations for correctness, security, and performance, with support from senior engineers.

  • Understanding of responsible AI use principles in an enterprise engineering context.

  • Proficient written and verbal communication skills, with the ability to engage both technical and non-technical audiences.

Things You Should Know

  • This is a hybrid role based in Fenton, MO (Tuesday | Wednesday | Thursday).

DISCLAIMER: This job description is designed to indicate the general nature and level of work performed by associates within this classification. It is not designed to confirm or be interpreted as a comprehensive summary of all duties, responsibilities and qualifications required of associates assigned to this job.

Maritz offers a comprehensive benefits package for full-time employees including medical, dental, vision, life insurance, disability, paid parental leave, 401k, tuition reimbursement, paid time off, year end holiday closure, and more!

View all details at: www.MaritzBenefits.com

Maritz will only employ applicants who have authorization to work permanently in the U.S. This is not a position for which sponsorship will be provided. Those who need sponsorship for work authorization now or in the future are not eligible for hire. No calls or agencies please.

Maritz is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to sex, race, color, religion, national origin, age, marital status, political affiliation, sexual orientation, gender identity, genetic information, disability or protected veteran status. We are committed to providing a workplace free of any discrimination or harassment.

If you have a disability and are having difficulty accessing or using this website to apply for a position, you can request help by calling 1-636-827-0380 or by sending an email to recruitment@maritz.com.

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