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Junior Software Developer Jobs in Belleville, IL

Lead Software Developer

Saint Louis, MO · On-site +1

$112K - $141K/yr

The Lead IT Software Developer is a well-rounded expert on the team in Front-End frameworks (Aurelia, Angular and such) and Back-End (Microsoft SQL and C#/.NET). He / She is the go-to person for any ...

Showing results 21-40

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 22, 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 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 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 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 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.

How much money do junior software developers make?

Junior software developers typically earn between $50,000 and $80,000 annually, depending on location, industry, and skills. Entry-level roles often require knowledge of programming languages like Java, Python, or JavaScript, and familiarity with development tools and frameworks.

How to get a junior software developer job with no experience?

To secure a junior software developer position with no experience, focus on building a portfolio through personal projects, contribute to open-source code, and learn relevant programming languages like Python or JavaScript. Gaining familiarity with version control tools such as Git and completing online courses or certifications can also improve your chances. Internships or apprenticeships can provide practical experience and industry exposure.

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 job categories do people searching Junior Software Developer jobs in Belleville, IL look for?

The top searched job categories for Junior Software Developer jobs in Belleville, IL 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 1% As Needed, 90% Full Time, 6% Part Time, and 3% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution, with an average salary of $86,422 per year, or $41.5 per hour.

Software Developer - Intermediate

RIVIDIUM

Saint Louis, MO

Full-time

Re-posted 29 days ago


Job description

RiVidium Inc. is seeking a Software Developer to develop, create, maintain, and write/code new (or modifies existing) computer applications, software, or specialized utility programs.

Tasks:

  • Automate the Risk Management Framework (RMF) process to the fullest extent.
  • Develop custom tools and dashboards, including executive data visualizations in Tableau, to support and enhance system continuous monitoring efforts.
  • Lead intermediate-level developers to success.
  • Act as a customer-facing representative engaging with key stakeholders.
  • Serve as a Frontend Designer to develop and design application interfaces using HTML, CSS, JavaScript, and React.
  • Write, develop, and deploy robust code across the full stack, utilizing languages such as Python.
  • Develop, integrate, and maintain databases to support backend application requirements.
  • Communicate effectively with all levels of personnel, both technical and non-technical.
  • Analyze information to determine, recommend, and plan the development of a new application or modification of an existing application.
  • Analyze user needs and software requirements to determine feasibility of design within time and cost constraints.
  • Apply coding and testing standards, apply security testing tools including "'fuzzing" static-analysis code scanning tools, and conduct code reviews.
  • Apply secure code documentation.
  • Capture security controls used during the requirements phase to integrate security within the process, to identify key security objectives, and to maximize software security while minimizing disruption to plans and schedules.
  • Compile and write documentation of program development and subsequent revisions, inserting comments in the coded instructions so others can understand the program.
  • Confer with systems analysts, engineers, programmers, and others to design application and to obtain information on project limitations and capabilities, performance requirements, and interfaces.
  • Consult with engineering staff to evaluate interface between hardware and software.
  • Correct errors by making appropriate changes and rechecking the program to ensure that desired results are produced.
  • Design, develop, and modify software systems, using scientific analysis and mathematical models to predict and measure outcome and consequences of design.
  • Develop secure code and error handling.
  • Evaluate factors such as reporting formats required, cost constraints, and need for security restrictions to determine hardware configuration.
  • Identify basic common coding flaws at a high level.

Abilities:

  • Ability to demonstrate a deep knowledge of software development and showcase a high level of understanding.
  • Ability to design and develop continuous monitoring tools and dashboards, analyzing and visualizing complex data using Tableau and other technologies.
  • Ability to operate effectively as a Full Stack Developer using Python, HTML, CSS, and JavaScript.
  • Ability to build interactive user interfaces using React and design robust database structures.
  • Ability to understand and apply the Risk Management Framework (RMF).
  • Ability to tailor code analysis for application-specific concerns.
  • Ability to use and understand complex mathematical concepts (e.g., discrete math).
  • Ability to develop secure software according to secure software deployment methodologies, tools, and practices.
  • Ability to apply cybersecurity and privacy principles to organizational requirements (relevant to confidentiality, integrity, availability, authentication, non-repudiation).
  • Ability to identify critical infrastructure systems with information communication technology that were designed without system security considerations.

Requirements:

  • Must possess established Risk Management Framework (RMF) knowledge upon hire.
  • Demonstrated experience with Python, HTML, CSS, JavaScript, and React.
  • Demonstrated experience working with databases, building visualizations in Tableau, and developing tools for continuous monitoring.
  • Bachelor degree or higher from an accredited college or university
  • Prefer an accredited Computer Science, Cyber Security, Information Technology, Software Engineering, Information Systems, or Computer Engineering degree; or a degree in a Mathematics or Engineering field.

Certifications: IAT Level 2

Active TS/SCI clearance required with the ability to get a CI Poly