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Junior Developer Jobs in Alton, IL (NOW HIRING)

Wiser

Cartographer (Junior) - TS/SCI

Saint Louis, MO · On-site

$70K - $80K/yr

Junior Cartographer - TS/SCI Location: St. Louis, MO TS/SCI Security Clearance Wiser offers innovative solutions to clients in the public, private, and government sectors. We combine technology and ...

Stereotaxis

Junior Buyer

Saint Louis, MO

$21.75 - $28/hr

The Junior Buyer supports the procurement of materials, components, equipment, and services ... Support Engineering by obtaining supplier information, documentation, and quotations for new and ...

Stellar IT Group

Core Java Developer

Saint Louis, MO · On-site

Conduct code reviews, troubleshoot issues, and provide technical guidance to junior developers. * Support CI/CD pipelines and ensure smooth deployment processes. Required Skills * Strong expertise in ...

CACI

Junior Software Engineer

Saint Louis, MO · On-site

$69K - $141K/yr

Junior Software Engineer Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: Up to 10% Type ...

E*Pro, Inc.

Jr. Validation Engineer

Saint Louis, MO · On-site

Position: Jr. Validation Engineer Location : St. Louis, MO Contract type: Contract Description : Temporary, entry-level position to mitigate expected validation workload Review requirements documents ...

Chenega Corporation

ServiceNow Developer

Saint Louis, MO · On-site

$52.50 - $72/hr

The Senior ServiceNow Developer will mentor junior developers, collaborate across engineering teams, and serve as the senior escalation point for complex technical challenges. Responsibilities * Lead ...

Automationtechies

Control Engineer

Saint Louis, MO · On-site

$81K - $105K/yr

You should be comfortable leading or supporting technical teams, mentoring junior engineers, and traveling to customer sites for startup and troubleshooting activities. Reasons you will be excited to ...

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Showing results 21-40

All JobsDeveloper JobsJunior Developer JobsJunior Developer Jobs in Alton, IL

Junior Developer information

See Alton, IL salary details

$23.1K

$85.6K

$132.2K

How much do junior developer jobs pay per year?

As of Sep 3, 2026, the average yearly pay for junior 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 junior developer?

A Junior Developer is an entry-level software professional who assists in creating, testing, and maintaining software applications. They typically work under the supervision of more experienced developers, learning best practices and acquiring new technical skills on the job. Junior Developers are expected to write code, fix bugs, and contribute to project documentation while gradually gaining experience in software development processes. This role is ideal for recent graduates or individuals transitioning into the tech industry.

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

To thrive as a Junior Developer, you need a solid understanding of programming fundamentals, basic knowledge of software development life cycles, and ideally a degree in computer science or a related field. Familiarity with coding languages like JavaScript, Python, or Java, as well as version control systems such as Git, is commonly expected. Strong problem-solving abilities, eagerness to learn, and effective communication help you integrate into teams and adapt to new challenges. These skills are crucial for producing quality code, collaborating with colleagues, and growing within the fast-paced tech environment.

What are some common challenges faced by junior developers during their first year, and how can they overcome them?

Junior Developers often face challenges such as adapting to new codebases, understanding company workflows, and bridging the gap between academic knowledge and real-world applications. It’s common to feel overwhelmed by unfamiliar technologies or debugging complex issues. Overcoming these challenges involves proactively seeking mentorship, participating in code reviews, and consistently asking questions to clarify concepts. Building strong communication skills and collaborating with more experienced team members can also accelerate the learning process and help you grow more confident in your role.

What is the difference between Junior Developer vs Software Engineer?

AspectJunior DeveloperSoftware Engineer
Required CredentialsTypically an associate degree or bootcamp certificationBachelor's degree in Computer Science or related field
Work EnvironmentEntry-level, supervised tasks, learning-focusedMore complex projects, often with team leadership responsibilities
Employer UsageCommon in startups, small companies, internshipsUsed across industries, larger companies, and tech firms
Search & Comparison IntentUnderstanding entry-level roles, career startClarifying career progression, skill requirements

In summary, Junior Developers are entry-level roles focused on learning and supporting development tasks, often requiring minimal experience. Software Engineers typically have more experience, advanced skills, and handle complex projects, making them a step up in the software development career path.

How to get a job as a junior developer?

To get a job 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 online courses can improve your chances, and applying to entry-level positions through job boards or company websites is essential.

What cities near Alton, IL are hiring for Junior Developer jobs?

Cities near Alton, IL with the most Junior Developer job openings:

Junior Developer jobs near you
Infographic showing various Junior Developer job openings in Alton, IL as of August 2026, with employment types broken down into 81% Full Time, 5% Part Time, 13% Contract, and 1% Nights. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $85,560 per year, or $41.1 per hour.

Cartographer (Junior) - TS/SCI

Wiser

Saint Louis, MO • On-site

$70K - $80K/yr

Full-time

Re-posted yesterday

Job description

Junior Cartographer - TS/SCI
Location: St. Louis, MO
TS/SCI Security Clearance
Wiser offers innovative solutions to clients in the public, private, and government sectors. We combine technology and expertise to develop inventive solutions that deliver quality results and aid in critical decision making. With the flexibility and efficiency of a small business, we provide nimble responsiveness with the low risk and strong performance experience of an established GEOINT and Geospatial service provider.
Role Description
We are presently identifying candidates for the following position: Junior Cartographer - TS/SCI. This position provides tradecraft and technical support for Foundation Data production, data integration, and data partnerships in support of the GEOINT Enterprise. The role requires a strong understanding of geography, Foundation Data processes and procedures, and Geographic Information Systems (GIS) to produce, review, and ensure the quality of geospatial data supporting map and chart production at various scales.
Responsibilities
  • Provide tradecraft and technical support for Foundation Data production, data integration, and data partnerships supporting GEOINT Enterprise operations.
  • Produce and review national and international Foundation Data for map and chart production at various scales using established Foundation Data processes and GIS principles.
  • Analyze and evaluate Foundation Data to ensure coverage, accuracy, currency, completeness, and applicability to mission and data requirements.
  • Participate in technical exchanges with Government and partner personnel at Government facilities, partner locations, and virtual collaboration environments worldwide.
  • Support Foundation Data production by developing Standard Operating Procedures (SOPs), authoring how-to guides, documenting best practices, and training team members.
  • Ensure a current and accurate International Traffic in Arms Regulations (ITAR) exemption is maintained for all requested support involving partner interactions.

Minimum Qualifications
  • U.S. Citizen
  • Active Top-Secret/SCI security clearance at time of application and willingness to complete a CI poly upon request.
  • A total of 3 points of relevant background via one of the following pathways:
    • High School diploma and 3 years of relevant military or full-time geospatial professional experience.
    • High School diploma and 2 years of experience plus relevant AIT/MOS training.
    • Relevant Bachelor's degree and 1 years of relevant experience.
    • Relevant Bachelor's degree and relevant Master's degree.
  • Demonstrated experience to performing data extraction and Imagery analysis using ArcMap/ArcGIS Pro/MAXAR.
  • Demonstrated experience as part of a team completing timely and accurate foundation data reviews.
  • Demonstrated experience as part of a team performing foundation data quality control / quality assurance analysis using GAIT/QAC software program.
  • Demonstrated experience to operate successfully in a fast-paced and dynamic environment as a team-member.
  • Basic experience understanding of and application of foundation data methodologies.
  • Basic experience to produce foundation data products

Preferred Qualifications
  • Understanding of the Technical Reference Document TRDv.4.x and UTRDv.1.x. (preferred, not required)
  • Demonstrated experience to communicate with clarity and accuracy both verbally and written (including virtually environments). (preferred, not required)
  • Extraction in support of crisis operations, geospatial Digital Twin, or AI/ML. (preferred, not required)
  • Familiarity with emerging Artificial Intelligence (AI) technologies, tools, and methodologies, with an understanding of their applications, implications, and integration into daily geospatial and intelligence workflows. (preferred, not required)

Work Environment
Team environment, onsite (Springfield, MO), Monday - Friday, full-time, flexible schedule.
*Candidates are encouraged to submit a resume that explicitly addresses each of the requirements listed above.
Wiser Imagery Services employs personnel within the states of Alabama, Colorado, Florida, Georgia, Illinois, Indiana, Kentucky, Maryland, Minnesota, Missouri, North Carolina, North Dakota, New York, Ohio, Pennsylvania, Tennessee, Texas, and Virginia.
Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans
To comply with Federal law, Wiser Imagery Services participates in E-Verify. Successful candidates must pass the E-Verify process upon hire.
Wiser Imagery Services is a drug-free workplace.
We respectfully request not to be contacted by recruiters and/or staffing agencies.

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