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Freelance Java Spring Developer Jobs in Illinois

Spruce Infotech

Sr Java Developer

Chicago, IL · On-site

$59 - $75.25/hr

Senior Software Developer - Java Location: Chicago, IL (Hybrid) Contract Job Summary We are seeking ... The ideal candidate should have strong expertise in Java, Spring Framework, Microservices, and ...

Kanak Elite Services Inc

Java AWS Developer

Chicago, IL · On-site

$52.50 - $68/hr

CHICAGO, IL(HYBRID) (NEED SOMEONE WITH 5-7 YERS OF EXPERINCE) We're looking for a Java AWS Developer with strong expertise in Java (Spring Boot), AWS cloud services, and microservices development.

Spruce Infotech

Java Full Stack Developer-Azure

Chicago, IL · On-site

$54 - $69.75/hr

Job Title: Java Full Stack Developer-Azure Location: Chicago, IL (Hybrid) Positions: 1-3 Job ... The ideal candidate will have hands-on expertise in Java, Spring Boot, Microservices, React , and ...

1 point system

Java Developer

Riverwoods, IL · On-site

$53 - $68.50/hr

You'll work across Java/Spring microservices, AWS EMR/Spark workloads, and a mature testing culture ... Collaborate with cross-functional teams (cloud engineering, data engineering, architecture, QA, and ...

Spruce Infotech

Sr Java Developer PCF

Chicago, IL · On-site

$59 - $75.25/hr

Key Skills: * Java * Spring Boot * Microservices Architecture * PCF (Pivotal Cloud Foundry ... Improve overall engineering quality through best practices, code reviews, and performance ...

IVID TEK INC

Sr Java Developer

Chicago, IL · On-site

$59 - $75.25/hr

Senior Java Developer Location: Chicago, IL Employment Type: Full-time Must be legally authorized ... Develop Spring Boot microservices using JDK 11/17 , JAX-RS (Apache CXF) , and Jackson JSON/XML for ...

TOPSYSIT

Java Full Stack Developer

Chicago, IL · On-site

$54 - $69.75/hr

Java Full Stack Developer | ONLY W2 Location: Chicago, IL | Hybrid Interview: Video Key ... Develop full-stack applications using Java, Spring Boot, Microservices, and REST APIs . * Build UIs ...

Laksan Technologies

Java Fullstack Developer

Chicago, IL · On-site

$54 - $69.75/hr

Java Fullstack Developer Location: Chicago, Illinois Job Type: C2C Onsite Long-term We are looking ... Develop and maintain scalable web applications using Java (Spring Boot) and React.Design RESTful ...

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Freelance Java Spring Developer information

What is a freelance Java Spring developer?

A Freelance Java Spring Developer is a self-employed software professional who specializes in building, maintaining, and optimizing applications using the Java programming language and the Spring framework. These developers work on a contract or project basis for various clients, rather than as full-time employees for a single company. Their responsibilities often include designing backend systems, integrating APIs, and ensuring applications are scalable and secure. Freelance Java Spring Developers typically manage their own schedules and may work remotely for clients around the world.

What are the key skills and qualifications needed to thrive as a freelance Java Spring developer?

To thrive as a Freelance Java Spring Developer, you need a solid understanding of Java programming, Spring Framework (including Spring Boot), and experience with RESTful APIs, typically supported by a degree in computer science or relevant certifications. Familiarity with tools like Maven, Git, Docker, and cloud platforms such as AWS or Azure is often required. Strong problem-solving, time management, and client communication skills help you stand out in this role. These competencies ensure you can deliver robust solutions efficiently while managing multiple clients and projects in a dynamic freelance environment.

What are the most common challenges faced by freelance Java Spring developers when working with multiple clients simultaneously?

Freelance Java Spring Developers often juggle projects for multiple clients, which can pose challenges such as managing shifting priorities, aligning with different coding standards, and keeping up with varied communication styles. Successfully navigating these requires strong organizational skills, clear project documentation, and proactive communication to set expectations. Additionally, freelancers must stay updated with the latest Spring framework updates to deliver high-quality, maintainable solutions across diverse client environments.

What is the difference between Freelance Java Spring Developer vs Java Backend Developer?

AspectFreelance Java Spring DeveloperJava Backend Developer
CredentialsOften requires Java certifications, Spring certifications, and relevant experienceTypically requires a Java degree or equivalent experience, with or without certifications
Work EnvironmentIndependent, project-based, remote or on-site freelance workFull-time employment in a company or organization, often in an office setting
Employer & Industry UsageClients across various industries hiring for specific projectsEmployers in tech, finance, e-commerce, and other sectors with ongoing backend needs
Search & Comparison IntentLooking for freelance opportunities or contract work in Java Spring developmentSeeking full-time or permanent backend development roles in Java

In summary, Freelance Java Spring Developers typically work independently on short-term projects, requiring specific certifications and flexible work environments. Java Backend Developers usually hold full-time roles within organizations, focusing on ongoing backend system development.

What are the most commonly searched types of Java Spring Developer jobs in Illinois?

The most popular types of Java Spring Developer jobs in Illinois are:

What are popular job titles related to Freelance Java Spring Developer jobs in Illinois?

For Freelance Java Spring Developer jobs in Illinois, the most frequently searched job titles are:

What job categories do people searching Freelance Java Spring Developer jobs in Illinois look for?

The top searched job categories for Freelance Java Spring Developer jobs in Illinois are:

What cities in Illinois are hiring for Freelance Java Spring Developer jobs?

Cities in Illinois with the most Freelance Java Spring Developer job openings:

Freelance Java Spring Developer jobs near you

Senior Java Full Stack Engineer - Spring Boot & Spring Batch

Long Finch Technologies

Stanford, IL

$51 - $66/hr

Full-time

Posted 6 days ago

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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