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Junior Developer Jobs in Decatur, IL (NOW HIRING)

ADM

Extrusion Scientist - Decatur, IL

Decatur, IL · On-site

$60K - $92K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... process engineering expertise to deliver scalable, high-quality solutions.Key ... junior scientists and contribute to capability developmentSupport capital projects and continuous ...

Cresco Labs

Lead, Processing

Lincoln, IL · On-site

$100K - $131K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Demonstrated experience training, leading and/or mentoring junior staff or new hires preferred. * Must have at least 1 year of experience working in a food production or similar manufacturing ...

New

Cresco Labs

Lead, Processing

Lincoln, IL

$100K - $131K/yr

Demonstrated experience training, leading and/or mentoring junior staff or new hires preferred .   * Must have at least 1 year of experience working in a food production or similar manufacturing ...

New

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All JobsDeveloper JobsJunior Developer JobsJunior Developer Jobs in Decatur, IL

Junior Developer information

See Decatur, IL salary details

$23.3K

$86.3K

$133.4K

How much do junior developer jobs pay per year?

As of Aug 14, 2026, the average yearly pay for junior developer in Decatur, IL is $86,304.00, according to ZipRecruiter salary data. Most workers in this role earn between $65,000.00 and $84,400.00 per year, depending on experience, location, and employer.

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.

How much does a junior developer earn?

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 Java, Python, or JavaScript, and familiarity with development tools and frameworks.

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 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.

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 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 to develop their technical skills.

What are popular job titles related to Junior Developer jobs in Decatur, IL?

For Junior Developer jobs in Decatur, IL, the most frequently searched job titles are:

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

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

Junior Developer jobs near you
Infographic showing various Junior Developer job openings in Decatur, IL as of August 2026, with employment types broken down into 75% Full Time, 11% Part Time, and 14% Contract. Highlights an 80% Physical, 5% Hybrid, and 15% Remote job distribution, with an average salary of $86,304 per year, or $41.5 per hour.

Senior Java Full Stack Engineer - Spring Boot & Spring Batch

Long Finch Technologies

Lincoln, IL • On-site

$51.25 - $66/hr

Full-time

This job post has expired today. Applications are no longer accepted.

Job description

We are looking for an experienced Senior Java Full Stack Developer with strong hands-on expertise in Java, Spring Boot, Spring Batch, and QA Automation. The ideal candidate will design, develop, and support scalable enterprise applications, build high-performance microservices, implement robust batch processing solutions, and drive automation and quality engineering practices.

Key Responsibilities
  • Design, develop, and maintain high-throughput Java/Spring Boot microservices for enterprise data processing and integration workflows.
  • Lead the development of Spring Batch applications for end-to-end data pipelines, including ingestion, validation, transformation, persistence, reconciliation, and status tracking.
  • Build secure and scalable REST API integrations with internal and external systems using Spring technologies.
  • Implement OAuth2 client credentials authentication, API retry mechanisms, timeout strategies, and observability-focused logging.
  • Develop file-to-database and API-to-database synchronization processes with strong data accuracy and traceability.
  • Implement batch processing best practices including restartability, idempotency, chunk processing, partitioning, and error recovery.
  • Design and optimize database workflows using PostgreSQL, including schema-aware CRUD operations, transaction management, indexing, and query optimization.
  • Establish automated quality gates using BDD and integration testing frameworks, including Cucumber and JUnit.
  • Perform API validation, database testing, and edge-case automation to ensure application reliability.
  • Drive production readiness through monitoring, health checks, exception handling, diagnostics, alerting, and operational support practices.
  • Collaborate with cross-functional teams including QA, DevOps, Product, and Data teams to deliver reliable software solutions.
  • Mentor developers through code reviews, architecture discussions, and engineering best practices.
Required Technical Skills
  • 8+ years of hands-on experience in Java development with strong knowledge of OOP principles, collections, concurrency concepts, and clean coding practices.
  • Strong expertise in Spring Boot and Spring Batch, including:
    • Job and step configuration
    • Item readers, processors, and writers
    • Chunk-based processing
    • Partitioning
    • Job restart and recovery strategies
  • Experience developing and consuming RESTful APIs using Spring MVC/WebFlux with secure service-to-service communication.
  • Strong knowledge of PostgreSQL and SQL, including:
    • Complex queries
    • Database transactions
    • Indexing strategies
    • Performance tuning
    • Large-volume ETL/data processing workloads
  • Hands-on experience with Spring Data JPA and JDBC Template for ORM-based and query-driven data access.
  • Experience with QA automation frameworks including:
    • Cucumber
    • JUnit
    • API automation
    • Database validation testing
  • Experience with build and deployment tools such as:
    • Maven
    • Docker
    • CI/CD pipelines

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