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Developer Jobs in Belleville, IL (NOW HIRING)

Atria Group LLC

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Our company provides application analysis, design, development and programming, software engineering, systems development, testing, integration, and implementation, and management consulting services ...

Stifel

Developer II

Saint Louis, MO · On-site

The Developer II will begin to learn cross-disciplinary development skills in a full-stack environment. The Developer II will ensure that Stifel's best practices are used in all development projects ...

Booz Allen Hamilton

Agentic AI Developer

O Fallon, IL · On-site

$99K - $225K/yr

R0241538 Agentic AI Developer The Opportunity: As an experienced engineer, you know that machine learning is critical to understanding and processing massive datasets. Your ability to conduct ...

Apex Informatics

Java Developer

Saint Louis, MO · On-site

$49.50 - $64.25/hr

Java Developer Location: St Louis, MO * 10+ years of hands-on software engineering experience * Excellent hands-on experience in Java * Experience in developing REST services. * Experience in unit ...

The Timberline Group

Netsuite Developer

Saint Louis, MO · On-site +1

The Developer must have strong NetSuite customization experience, customer interfacing skills, and any web development and/or C# experience is a plus. Required Skills: * 5+ years NetSuite development

London Stock Exchange Group

DevOps Engineer

Saint Louis, MO · On-site

$51.25 - $70.25/hr

We are hiring a DevOps Engineer to own the delivery pipeline and operational automation for LSEG's internal observability platform - a high-ownership role with direct impact on how the platform gets ...

London Stock Exchange Group

DevOps Engineer

Saint Louis, MO · On-site

$49.50 - $67.75/hr

We are hiring a DevOps Engineer to own the delivery pipeline and operational automation for LSEG's internal observability platform - a high-ownership role with direct impact on how the platform gets ...

London Stock Exchange Group

DevOps Engineer

Saint Louis, MO · Remote

$51.25 - $70.25/hr

We are hiring a DevOps Engineer to own the delivery pipeline and operational automation for LSEG's internal observability platform - a high-ownership role with direct impact on how the platform gets ...

Chenega Corporation

ServiceNow Developer

Saint Louis, MO

$52.50 - $72/hr

ServiceNow Developer St. Louis, MO Are you ready to enhance your skills and build your career in a rapidly evolving business climate? Are you looking for a career where professional development is ...

Chenega Corporation

ServiceNow Developer

Saint Louis, MO

$52.50 - $72/hr

Summary ServiceNow Developer St. Louis, MO Are you ready to enhance your skills and build your career in a rapidly evolving business climate? Are you looking for a career where professional ...

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Showing results 21-40

All JobsDeveloper JobsDeveloper Jobs in Belleville, IL

Developer information

See Belleville, IL salary details

$38.9K

$125.6K

$154K

How much do developer jobs pay per year?

As of Aug 9, 2026, the average yearly pay for developer in Belleville, IL is $125,636.00, according to ZipRecruiter salary data. Most workers in this role earn between $103,000.00 and $152,500.00 per year, depending on experience, location, and employer.

What is the difference between Developer vs Software Engineer?

AspectDeveloperSoftware Engineer
CredentialsTypically requires a degree in computer science or related field, certifications varyOften requires a degree in computer science or software engineering, certifications may include Microsoft, AWS, etc.
Work EnvironmentWorks on coding, debugging, and implementing software applicationsDesigns, develops, tests, and maintains software systems, often involved in architecture decisions
Industry UsageCommonly used in tech companies, startups, and software firmsUsed across industries for system development, enterprise solutions, and software projects
Search & Comparison IntentPeople compare Developer with Software Engineer to understand roles and career paths

While both Developers and Software Engineers work on software projects, Developers primarily focus on coding and implementing features, whereas Software Engineers often take a broader role in designing and architecting software systems. The roles overlap significantly, but Software Engineers typically have a more comprehensive scope involving system design and engineering principles.

Is a developer still in demand?

Yes, developers are in high demand across many industries due to ongoing digital transformation and the need for software solutions. Skills in programming languages like Java, Python, and JavaScript, as well as experience with cloud platforms and agile development, enhance employability in this field.

What are some common challenges developers face when working on large-scale projects, and how can they overcome them?

Developers working on large-scale projects often encounter challenges such as coordinating with multiple team members, managing complex codebases, and ensuring consistent documentation. To overcome these obstacles, it's important to follow best practices like version control, code reviews, and regular communication through agile methodologies. Additionally, leveraging collaboration tools and maintaining clear documentation can help streamline workflows and minimize misunderstandings within the team.

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

To thrive as a Developer, you need strong programming skills in languages like Java, Python, or JavaScript, paired with a solid understanding of algorithms and software development principles, often supported by a degree in computer science or related field. Familiarity with version control systems (such as Git), integrated development environments (IDEs), and sometimes cloud platforms or specific frameworks is typical. Problem-solving ability, attention to detail, and effective communication are standout soft skills for this role. These competencies are crucial for building reliable, maintainable software and collaborating efficiently within development teams.

What is a developer?

A software developer—sometimes referred to as a software engineer, computer programmer, or computer scientist—designs and develops programs, applications, websites, and databases. Their responsibilities include creation, testing, and modification of the code that runs programs within IT systems. Software developers generally have a bachelor’s degree in computer science and are familiar with writing code in at least one programming language.

More about Developer jobs
What are the most commonly searched types of Developer jobs in Belleville, IL? The most popular types of Developer jobs in Belleville, IL are:
What are popular job titles related to Developer jobs in Belleville, IL? For Developer jobs in Belleville, IL, the most frequently searched job titles are:
What job categories do people searching Developer jobs in Belleville, IL look for? The top searched job categories for Developer jobs in Belleville, IL are:
What cities near Belleville, IL are hiring for Developer jobs? Cities near Belleville, IL with the most Developer job openings:
Developer jobs near you
Infographic showing various 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 $125,636 per year, or $60.4 per hour.

Java Developer

Atria Group LLC

Saint Louis, MO • On-site

$49.50 - $64.25/hr

Contractor

Re-posted 21 days ago

Job description

Company Description

We specialize in Staffing, Consulting, Software Development, and Training along with IT services to small to medium size companies. AG's primary objective is to help companies maximize their IT resources and meet the ever-changing IT needs and challenges.

In addition, AG offers enterprise resource planning and enterprise application integration, supply-chain management, e-commerce solutions, and B2B public exchanges and B2B process integration solutions. Our company provides application analysis, design, development and programming, software engineering, systems development, testing, integration, and implementation, and management consulting services to various clients - including governmental agencies and private companies - throughout the United States and India.

We provide these services in multiple computing environments and use technologies such as client/server architecture, object-oriented programming languages and tools, distributed database management systems, state-of-the-art networking, and communications infrastructures. Our honest and realistic approach to recruiting dictates that AG does not entice or lure engineers from their employers. We represent only high caliber technical professionals who have committed to making a change required by career.

Job Description

Required Skills: 

5+ years advanced computer programming skills in Java, Java Servlet, Javabean, EJB, OO Design, HTML. Advanced working skills in programming with SQL or Oracle. Experience writing JUnit test-cases and building test-suites. 5+ years of experience in systems analysis and working closely with business customer Significant working knowledge with the RAD/Eclipse/WebSphere Familiarity with J2EE technology, such as JNDI, JMS, RMI, JNDI, XML, XSL, XSL-FO and JDBC Experience with code versioning and change management concepts Experience with full life-cycle software applications development (i.e., design, construction, testing, and implementation) Experience with requirements definition and specifications design Experience analyzing functional requirements in Sprints to write component detailed design technical documents. Able to design and build systems that are integrated with other client systems Demonstrates an expert level of proficiency in the use of computer languages and utilities necessary to support application development Preferred Skills: Able to perform the complete system life cycle using the Agile Scrum Methodology phases from project initiation, analysis and requirements, design, coding, testing and implementation Able to adhere to client development standards and SOX compliance Ability to communicate to a wide variety of audiences, both business and technical Proven ability to develop and maintain system documentation Ability to work independently with minimal direction Bachelor s degree or equivalent

Additional Information

GOOD COMMUNICATION SKILLS

DURATION: 6+ Months Contract

INTERVIEW: Telephonic and Skype / Face 2 face

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