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Jr Developer Jobs in Belleville, IL (NOW HIRING)

JS Consulting

Senior Developer

Saint Louis, MO · On-site

$53 - $70/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Job Title- Senior Developer Project Location - Hybrid in Saint Louis, MO Duration- Full-time Visa- USC Must Have: Bachelor's Degree. Benefits: Excellent pay, comprehensive healthcare packages ...

Leidos

Software Developer

Saint Louis, MO

$107K - $195K/yr

The Leidos Spatial Solutions Division has an exciting opportunity for an experienced Software Developer to help enable NGA's Geospatial Intelligence (GEOINT) mission collecting sciences, technology ...

Pyramid IT

Java Developer

Saint Louis, MO

$49.50 - $64.25/hr

Java Developer Location - St. Louis, MO Duration: Long term contract Work Authorization status : US Citizen & Green card only Mandatory Skills: J2EE (Java, JSP, Servlets, Filters, Listeners, JSTL, EL ...

SAIC

Web Software Developer

Scott Air Force Base, IL · On-site

$120K - $160K/yr

SW Engineer Schedule: Full-Time Shift: Day Job Travel: No Minimum Clearance Required: TS.SCI Clearance Level Must Be Able to Obtain: None Potential for Remote Work: ORA_ON_SITE Description SAIC is ...

Esri

Application Developer - JavaScript

Saint Louis, MO · On-site

$83K - $141K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Overview We are seeking an Application Developer to join Esri's Geo Experience Center team, where you will contribute to building prototype applications that explore digital cartography, advanced map ...

Arka Infotech Inc

Sr. Scala Developer

Saint Louis, MO

$53 - $70/hr

Sr. Scala Developer 12+ Months St. Louis, Missouri 08-03-2015 Senior Scala Developer w/hands-on experience writing Scala architecture on OS X and AWS models -- experience coding in Clojure, Java, and ...

The Timberline Group

Java/J2EE Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

Master's degree in Computer Science, Information Science, Electronic or Electrical Engineering or any related field of study, plus three (3) years of experience in the job offered or any related ...

The Timberline Group

Java/Angular Developer

Saint Louis, MO · On-site +1

$49.50 - $64.25/hr

The developer will meet with clients, analyze client requirements, propose & construct solutions and develop B2B and B2C incentive and ecommerce applications. Basic Qualifications * Bachelor of ...

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Showing results 41-60

All JobsJr Developer JobsJr Developer Jobs in Belleville, IL

Jr Developer information

See Belleville, IL salary details

$23.3K

$86.4K

$133.6K

How much do jr developer jobs pay per year?

As of Aug 15, 2026, the average yearly pay for jr 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 is a jr developer?

Jr Developers, or Junior Developers, are entry-level professionals in the software development field. They typically have less experience than mid-level or senior developers and are responsible for writing, testing, and maintaining code under the guidance of more experienced team members. Jr Developers often work on smaller tasks, bug fixes, or simple features, and are expected to learn and grow their technical skills through mentorship and hands-on experience. Their role is essential for building a solid foundation in software development and contributing to the success of development projects.

What does a junior developer do?

A junior developer assists in designing, coding, testing, and maintaining software applications under the supervision of senior developers. They typically work with programming languages like Java, Python, or JavaScript and use development tools such as version control systems. Their role involves learning best practices and gaining experience in software development processes.

How much does a junior developer get paid?

A junior developer typically earns between $50,000 and $70,000 annually, depending on location, industry, and skills. Entry-level roles often require knowledge of programming languages like JavaScript, Python, or Java, and may include benefits such as training and mentorship.

What are some common challenges a jr developer might face when joining a new team, and how can they overcome them?

As a Jr Developer, one of the most common challenges is adapting to unfamiliar codebases and workflows. It can be daunting to understand existing projects and navigate team-specific tools and processes. To overcome this, Jr Developers should proactively seek help from team members, take thorough notes, and dedicate time to reviewing documentation and code. Embracing code reviews and asking questions will not only accelerate learning but also help build relationships within the team.

What is the difference between Jr Developer vs Junior Software Engineer?

AspectJr DeveloperJunior Software Engineer
Required CredentialsTypically an associate degree or coding bootcamp certificationUsually a bachelor's degree in computer science or related field
Work EnvironmentEntry-level, supervised tasks, learning-focusedSimilar entry-level environment, often with more complex project involvement
Employer & Industry UsageCommon in tech companies, startups, and IT departmentsUsed interchangeably in many companies, especially in software development teams
Search & Comparison IntentYes, often compared for entry-level rolesYes, often searched as a more formal or technical title

While both roles are entry-level software development positions, a Jr Developer often emphasizes basic coding tasks and learning, whereas a Junior Software Engineer may involve more structured engineering responsibilities. The titles are frequently used interchangeably, but understanding the specific job description can clarify expectations.

What are the key skills and qualifications needed to thrive as a jr developer?

To thrive as a Jr Developer, you need a foundational understanding of programming languages (such as JavaScript, Python, or Java), basic software development principles, and often a relevant degree or coding bootcamp certification. Familiarity with version control systems like Git, IDEs, and workflow tools like Jira or Trello is typically required. Strong problem-solving skills, effective communication, and eagerness to learn help Jr Developers stand out in the workplace. These abilities are crucial for efficiently contributing to team projects, adapting to new technologies, and growing within a dynamic development environment.

What are popular job titles related to Jr Developer jobs in Belleville, IL?

For Jr Developer jobs in Belleville, IL, the most frequently searched job titles are:

What job categories do people searching Jr Developer jobs in Belleville, IL look for?

The top searched job categories for Jr Developer jobs in Belleville, IL are:

What cities near Belleville, IL are hiring for Jr Developer jobs?

Cities near Belleville, IL with the most Jr Developer job openings:

Jr Developer jobs near you
Infographic showing various Jr Developer job openings in Belleville, IL as of August 2026, with employment types broken down into 79% Full Time, 5% Part Time, 14% Contract, and 2% Nights. Highlights an 81% Physical, 4% Hybrid, and 15% Remote job distribution, with an average salary of $86,422 per year, or $41.5 per hour.

Senior Developer

JS Consulting

Saint Louis, MO • On-site

$53 - $70/hr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 8 hours ago

Job description

Job Title- Senior Developer

Project Location – Hybrid in Saint Louis, MO

Duration- Full-time

Visa- USC

Must Have: Bachelor’s Degree.

Benefits: Excellent pay, comprehensive healthcare packages, including medical, dental, vision and life insurance. 401K with employer match. Vacation, Personal time, holidays and winter break.

Summary: Our client is seeking a Senior Developer; this position will work with a growing team on innovative and leading-edge solutions with our Video Entertainment Team.  You will join an existing motivated and productive development team who delivers enterprise-level solutions related to delivery and playback of Hollywood content.  Swank works closely with major Hollywood studios in providing leading edge solutions for content consumption.

Description: This position is responsible for upholding the values and mission of the Information Technologies Department, this includes the establishment of customer service and satisfaction standards. Communication and understanding of customer objectives and our progress toward fulfilling these objectives is paramount to the success of this role. This position will work in a team environment using a variety of technologies for building leading edge solutions for both internal, as well as customer-facing media playback solutions.  Solutions employ advanced video security techniques including forensic watermarking, Digital Rights Management (DRM) and encryption. Technologies used include but are not limited to:

  • Work on the latest web technologies including Angular (19), .Net Core, Web API and Typescript.
  • Work on the latest technologies of .Net Core and .Net 4.
  • Windows Server and Linux.
  • Docker/Kubernetes.

 Requirements:

  • 8+ years of C# experience.
  • 6+ years of ASP.NET development, including MVC 4/5 development.
  • Strong Web Development: Typescript, HTML5 using frameworks like Angular or similar.
  • Strong knowledge of object-oriented programming.
  • Strong knowledge of web API/REST.
  • Strong knowledge of documenting technical specifications.
  • Experience with Git.
  • Experience with using SQL Server as a backend preferred.
  • Experience with Entity Framework.
  • Experience with a Continuous integration toolset (Azure DevOps, Teamcity, or similar).
  • Experience with using SQL Server as a backend preferred.
  • Experience with Entity Framework and Dapper.
  • Significant experience writing unit tests for code including client script.
  • Experience with Docker/Kubernetes as plus.
  • Ability to quickly become productive with new technologies.
  • Proven experience delivering solutions into production.
  • Must be a self-starter.
  • Excellent communication skills.
  • Must be able to participate in design and code reviews.
  • Must be able to assist team members in the completion of tasks and assignments to ensure project completion.
  • Must be able to mentor junior development team staff and ensure completion of assigned projects by the team.
  • Bachelor’s Degree.
  • Experience with streaming media and video is beneficial.