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Jr Developer Jobs in Belleville, IL (NOW HIRING)

The Timberline Group

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 ...

JS Consulting

Senior Developer

Saint Louis, MO · On-site

$53 - $70/hr

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 ...

Sovereign Technologies

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 ...

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 ...

TecTammina

Drools / JBOSS Developer

Saint Louis, MO

$49.50 - $64.25/hr

Application Designer/Developer for Redhat DROOLS Business Rules Management System [BRMS]. Develop, test and deploy complex rules in DROOLS Fusion and DROOLS CEP Experience with configuring and ...

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

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 ...

RIVIDIUM

Software Developer - Advanced

Saint Louis, MO · On-site

$150K - $160K/yr

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

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 ...

Arka Infotech Inc

Sr. Scala Developer

Saint Louis, MO · On-site

$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 ...

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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 Sep 6, 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 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 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.

How hard is it to get a junior developer job?

Securing a junior developer position typically requires foundational programming skills, a portfolio of projects, and familiarity with relevant tools like Git and common programming languages. Entry-level roles are often competitive, but candidates with relevant internships, certifications, or coding bootcamp experience have better chances of being hired.

How to get hired as a junior developer?

To get hired as a junior developer, build a strong foundation in programming languages like JavaScript, Python, or Java, and create a portfolio of projects to demonstrate your skills. Gaining experience through internships, coding bootcamps, or contributing to open-source projects can improve your chances, along with obtaining relevant certifications and preparing for technical interviews.

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, 10% Part Time, and 11% Contract. Highlights an 81% Physical, 5% Hybrid, and 14% Remote job distribution, with an average salary of $86,422 per year, or $41.5 per hour.

Lead Software Developer

The Timberline Group

Saint Louis, MO • On-site, Remote

$112K - $141K/yr

Full-time

Re-posted 20 days ago

Key responsibilities

  • Guide and mentor team members in the adoption and application of specific technologies.

  • Participate in the design, development, and troubleshooting of complex software components.

  • Collaborate with architects and other leaders to ensure technology standards and architecture alignment.

Job description

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 questions or direction relating to technologies for his/her assigned team and may be a resource for other experts around the organization. The lead developer works closely with/or is the architect to ensure that the technology fits within the overall architecture and create guidelines and standards in the use of technology. While the architect on the team has overall responsibility for the big picture view of the architecture for the system and the overall working of the system, the lead developers is responsible for making sure that specific technology (or technologies) where he/she is the expert is applied appropriately within the team.
Job Responsibilities:
The individual in this role is a senior member of the IT team who is able to understand the use of the technology, the best practices surrounding its use and how to apply it within the particular project or team. The person is part of prototyping or may even lead some of the prototyping / proof-of-concept activities. The individual guides and mentors other members of the team in their adoption of the particular technology. All this happens within the framework and process created by the architecture team, and the architecture team has the ultimate approval authority on the adoption of a particular technology. The individual will have the responsibility for the low-level design based on the high-level framework provided by the team's architect.
The lead developers also participates in the design and development activities. Because of the leadership roles, the lead developer is expected to take on complex design, development and troubleshooting tasks. The individuals leads by example by producing high quality implementation that sets the standards for how the technology is used within the team.
The lead developer also collaborates with other leaders within the organization and End-Clients to establish cross-team standards, liaising with the architect and other senior members of other application development teams. The individual also participates in researching new technologies within the organization.
Assist with other project or departmental activities as needed.
Requirements:
  • Bachelor's degree in Engineering, Computer Science, Mathematics or scientific discipline.
  • 10+ years IT experience, with at least 8 years of software development experience, and with 2+ years in a Sr. Software Engineering role.
  • 6+ years of programming experience in C# .NET.
  • Past experience developing software as part of a team in a complex n-tier application environment comprising websites, web services, databases, SOA etc.
  • Experience with Microservices architecture.
  • Experience writing SQL queries, stored procedures, and working with SQL Server.
  • Experience with Entity Framework, Web API and RESTful services.
  • Experience working with SPA applications.
  • Experience developing high quality software while adhering to unit and integration testing guidelines in an agile environment and CI/CD practices.
  • Strong programming experience with Object-Oriented Design principles and design patterns.
  • Demonstrated ability to guide and mentor other technical staff.
  • Excellent communication skills.

The Timberline Group
Phone: 636-209-5537
PO Box 385, Lebanon, MO 65536
www.timberlinegrp.com
resumes@timberlinegrp.com
"Delivering quality solutions through quality people"

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