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Junior Software Developer Jobs in Belleville, IL

Junior Software Developer

Saint Louis, MO · On-site

$60K - $65K/yr

Interco is seeking a talented Junior Software Developer with a strong background in JavaScript and React.js to contribute to an innovative Enterprise Resource Planning (ERP) project. In this role ...

Junior Software Developer

Saint Louis, MO · On-site

$60K - $65K/yr

Interco is seeking a talented Junior Software Developer with a strong background in JavaScript and React.js to contribute to an innovative Enterprise Resource Planning (ERP) project. In this role ...

NET Software Developer / Software Engineer / Web Application Developer MarketVolt, LLC, a digital marketing software and services firm based in St. Louis, seeks a creative software developer who can ...

NET Software Developer / Software Engineer / Web Application Developer MarketVolt, LLC, a digital marketing software and services firm based in St. Louis, seeks a creative software developer who can ...

Software Developer Lead

Saint Louis, MO · On-site

$112K - $141K/yr

Software Developer Lead Location: HYBRID, St. Louis, MO (2x a week on-site) Security Clearance ... Mentoring Mid and Junior engineers and removing roadblocks. Nice to have * Experience working with ...

The Leidos FS2 Aero team has an opening for a junior (entry level) software developer to work on the design and coding with software solutions for the Aeronautical Navigation Office. The ideal ...

The Leidos FS2 Aero team has an opening for a junior (entry level) software developer to work on the design and coding with software solutions for the Aeronautical Navigation Office. The ideal ...

Junior C# Developer

Saint Louis, MO · On-site

$65K - $84K/yr

Company Description The individual in the Programmer Analyst role is responsible for using technical skills and programming experience to define and program solutions to problems and requests of ...

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Junior Software Developer information

See Belleville, IL salary details

$23.3K

$86.4K

$133.6K

How much do junior software developer jobs pay per year?

As of Aug 7, 2026, the average yearly pay for junior software developer in Belleville, IL is $86,422.00, according to ZipRecruiter salary data. Most workers in this role earn between $65,100.00 and $84,500.00 per year, depending on experience, location, and employer.

What are some typical challenges a junior software developer might face when starting out, and how can they overcome them?

Junior Software Developers often encounter challenges such as understanding large codebases, managing their time effectively between learning and delivering tasks, and adapting to new development tools or frameworks. To overcome these hurdles, it's helpful to actively seek guidance from more experienced team members, participate in code reviews, and make consistent use of documentation. Regular communication within the team and a willingness to ask questions can significantly speed up the learning process and help build confidence in your role.

What does a junior software developer do?

A junior software developer works on a development team writing and maintaining code for computer applications. As a junior software developer, your primary responsibilities are to learn the codebase, work on small bug fixes, and participate in paired programming with mid-level and senior developers. Junior software developers are entry-level positions, but as you gain experience and build up your programming skills, you will start to take on larger projects. Your job duties include attending and contributing to development team meetings, troubleshooting, patching computer code, and collaborating with other developers to create applications.

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

To thrive as a Junior Software Developer, you need proficiency in programming languages (such as Python, Java, or JavaScript), algorithms, and problem-solving, often supported by a relevant degree or coding bootcamp experience. Familiarity with version control systems like Git, basic knowledge of databases, and experience with development frameworks are valuable technical assets. Strong communication, teamwork, and a willingness to learn help you adapt and contribute effectively in collaborative environments. These skills and qualities are essential for delivering reliable code, supporting team goals, and growing in a fast-evolving tech landscape.

What does a junior software developer do?

A Junior Software Developer is an entry-level professional who assists in designing, coding, testing, and maintaining software applications. They typically work under the supervision of more experienced developers and contribute to various stages of the software development lifecycle. Their responsibilities often include writing basic code, debugging, collaborating with team members, and learning new technologies to improve their skills. This role is a great starting point for individuals looking to build a career in software development.
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:
What are popular job titles related to Junior Software Developer jobs in Belleville, IL? For Junior Software Developer jobs in Belleville, IL, the most frequently searched job titles are:
What cities near Belleville, IL are hiring for Junior Software Developer jobs? Cities near Belleville, IL with the most Junior Software Developer job openings:
Infographic showing various Junior Software Developer job openings in Belleville, IL as of August 2026, with employment types broken down into 87% Full Time, 8% Part Time, 3% Contract, and 2% Nights. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution, with an average salary of $86,422 per year, or $41.5 per hour.

Junior Software Developer

Interco Trading

Saint Louis, MO

$60K - $65K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 9 days ago


Job description

Company Description

Interco is a global metals trading and recycling company headquartered in St. Louis with facilities in Missouri and Illinois. The company buys, sells, and processes nonferrous metals and electronics scrap worldwide utilizing established partnerships with end consumers in the United States, Europe, Latin America,and Asia.

Job Description

Interco is seeking a talented Junior Software Developer with a strong background in JavaScript and React.js to contribute to an innovative Enterprise Resource Planning (ERP) project. In this role, the successful candidate will take the lead in crafting and executing sophisticated user interfaces for the company's ERP software, aiming to deliver an unparalleled user experience. The Software Developer will collaborate with development team members and management to ensure projects align with the needs of the company. This role involves turning project requirements into functional, visually captivating interfaces that solve problems, optimize workflows, and provide valuable data that offers real-time business insight. Join Interco to be at the forefront of developing solutions that redefine efficiency and impact in ERP systems. 

Responsibilities Include 

  • Develop responsive and user-friendly front-end interfaces for our ERP software using JavaScript, HTML, CSS, and React.js. 
  • Collaborate with development team to design, consume, and integrate RESTful APIs that retrieve and update data from PostgreSQL backends. 
  • Work closely with UI/UX designs to translate wireframes and mockups into functional user interfaces, ensuring consistency with design guidelines and best practices. 
  • Participate in defining API contracts, perform contract and integration debugging, and collaborate on end-to-end testing. Collaborate on CI/CD pipelines and use containerized development environments. 
  • Write and maintain technical documentation. 
  • Implement and maintain reusable components and libraries to streamline development and ensure consistency across ERP software. 
Qualifications
  • Bachelor's degree in Computer Science, Software Engineering, or a related field. 
  • Proven experience as a Software Developer, building complex web applications or ERP systems with a portfolio representative of a strong technical acumen. 
  • Proficiency in front-end technologies such as HTML5, CSS3, JavaScript, and various front-end frameworks (e.g., React, Angular, Vue.js) with a solid understanding of responsive design principles. 
  • Practical experience consuming and integrating RESTful APIs; experience building RESTful APIs with FastAPI is a plus. 
  • Solid working knowledge of PostgreSQL (writing queries, schema design, indexing, migrations) 
  • Experience with version control systems and collaboration tools such as Git and Figma. 
  • Strong problem-solving skills and attention to detail to identify and resolve issues effectively. 
  • Excellent communication and teamwork skills to collaborate with cross-functional teams effectively. 
Additional Information
  • $60,000-$65,000 
  • Salary plus annual performance review and bonus 
  • 401(k) with generous company match after one year 
  • Paid vacation Christmas Eve through - New Year's Day for all employees 
  • Accelerated paid Vacation time 
  • Company paid $25K life insurance policy 
  • 100% Company-paid Short-Term Disability, Long-Term Disability 
  • 100% Company-paid Medical, Dental, Vision 

As a matter of company policy, the Company does not sponsor employment visas or hire from out of the USA nor does the company sponsorcandidates who do not currently reside within the USAwithout an existing H-1B visa. 

This job description is designed to provide a general overview of the requirements of the job and does not entail a comprehensive listing of all activities, duties or responsibilities that will be required. Interco reserves the right to modify this job description at any time, including assigning or reassigning job duties or eliminating this position at any time. 

Candidate information will be kept confidential according to EEO guidelines. 

Work remotely: No 

www.intercojobs.com 

Company Information 

Interco has been recycling computers, batteries, metals, and electronics with a focused track record of innovation and integrity since 1996. The company specializes in the placement of smelter-ready materials catering to commercial, industrial, dealer, and government organizations nationwide. 

The Interco recyclingfacilities are separated into three departments: nonferrous metals, computers and electronics, and battery processing. The nonferrous facility is located on the 40-acre main campus in Madison (IL) while the computers and electronics are processed in Edwardsville where the Administrative and some logistics offices are located. The commercial department is located on The Hill in St. Louis. 

www.intercojobs.com Â