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Jr Developer Jobs in Alton, IL (NOW HIRING)

Meridian Systematics

Software Developer

Saint Louis, MO · On-site

$90K - $110K/yr

Software Developer Position Overview We are seeking an experienced Software Developer to support the Geospatial Services & Solutions (GSS) business area in delivering high-quality, cost-effective ...

New

Meridian Systematics

Software Developer

Saint Louis, MO · On-site

$90K - $110K/yr

Parental leave Software Developer Position Overview We are seeking an experienced Software Developer to support the Geospatial Services & Solutions (GSS) business area in delivering high-quality ...

New

Meridian Systematics

Software Developer

Saint Louis, MO · On-site

$90K - $110K/yr

Software Developer Position Overview We are seeking an experienced Software Developer to support the Geospatial Services & Solutions (GSS) business area in delivering high-quality, cost-effective ...

New

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 ...

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 ...

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 ...

Sovereign Technologies

C# Web Developer

Saint Louis, MO · On-site

As a Web Developer, work with members of a Scrum / Agile project team to develop the site concept, interface design, and architecture of the company website. Under general direction, you will design ...

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 ...

Booz Allen Hamilton

Agentic AI Developer

O Fallon, IL · On-site

$99K - $225K/yr

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 statistical ...

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 ...

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Showing results 21-40

All JobsJr Developer JobsJr Developer Jobs in Alton, IL

Jr Developer information

See Alton, IL salary details

$23.1K

$85.6K

$132.2K

How much do jr developer jobs pay per year?

As of Aug 13, 2026, the average yearly pay for jr developer in Alton, IL is $85,560.00, according to ZipRecruiter salary data. Most workers in this role earn between $64,400.00 and $83,700.00 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 cities near Alton, IL are hiring for Jr Developer jobs? Cities near Alton, IL with the most Jr Developer job openings:
Jr Developer jobs near you
Infographic showing various Jr Developer job openings in Alton, IL as of August 2026, with employment types broken down into 79% Full Time, 6% Part Time, and 15% Contract. Highlights an 84% Physical, 3% Hybrid, and 13% Remote job distribution, with an average salary of $85,560 per year, or $41.1 per hour.

Software Developer

Meridian Systematics

Saint Louis, MO • On-site

$90K - $110K/yr

Full-time

Posted 2 days ago

New

Job description

Software Developer

Position Overview

We are seeking an experienced Software Developer to support the Geospatial Services & Solutions (GSS) business area in delivering high-quality, cost-effective software solutions within a sophisticated enterprise environment.
The Software Developer will participate in SAFe and Scrum development teams and contribute throughout the Software Development Life Cycle (SDLC), including requirements analysis, design, development, testing, deployment, and sustainment. The developer will build and deploy custom applications and services supporting the customer's enterprise and GEOINT mission. 
Responsibilities

  • Research, design, develop, test, deploy, and maintain enterprise applications and software solutions.
  • Analyze user and business requirements and translate them into effective technical solutions.
  • Write well-designed, efficient, maintainable, and testable code.
  • Develop automated unit and integration tests, resolve defects, and support formal testing and releases.
  • Design and maintain application code across development, test, production, and on-premises/data-center environments.
  • Utilize the customer's enterprise DevSecOps and CI/CD pipelines to build, test, integrate, and deploy software.
  • Develop and maintain application monitoring while adhering to established security requirements.
  • Participate in sprint planning, backlog refinement, story development, estimation, retrospectives, and other SAFe/Scrum activities.
  • Communicate progress, technical risks, dependencies, and delivery concerns to the Scrum Master and development team.
  • Maintain technical documentation and recommend improvements to application processes, performance, reliability, and maintainability.
  • Provide technical support and consultation for application, database, and infrastructure issues.
  • Develop solutions that integrate enterprise data, databases, geospatial systems, and customer workflows.
Required Qualifications

  • Active TS/SCI clearance required; eligibility to obtain a CI polygraph.
  • Bachelor's degree in Computer Science, Engineering, Mathematics, or a related technical discipline, or equivalent education, technical training, or professional/military experience, and 5+ years of related software development experience.
  • Expert proficiency in at least one programming language and experience with multiple technologies such as Python, Java, JavaScript, React, or .NET/Visual Basic.
  • Strong understanding of software development processes and DevSecOps practices.
  • Experience with Docker and Kubernetes and container-based application development.
  • Experience with CI/CD tools such as GitLab, Jenkins, or Nexus.
  • Experience with SQL data stores and enterprise databases.
  • Experience deploying software to on-premises/data-center infrastructure.
  • Strong problem-solving, troubleshooting, communication, and collaborative development skills.
  • Experience using Jira and Confluence in an Agile development environment.
Preferred Qualifications

  • Experience developing containers for Red Hat OpenShift.
  • Experience with Elasticsearch.
  • Front-end development experience with HTML, CSS/Sass/Less, JavaScript, or React.
  • Experience with Infrastructure as Code using Helm or Terraform.
  • Experience with AWS/cloud infrastructure.
  • Experience with PostgreSQL or other relational/object-relational databases.
  • Experience with ArcGIS, MAPINFO, or other geospatial technologies.
  • Familiarity with NGA systems architecture, GEOINT workflows, imagery databases, or intelligence-community mission systems.
  • Experience developing dashboards, workflow automation, APIs, or data-integration solutions.

Location: On Customer Site
US Citizenship Required