Top Java Developer Jobs in Chicago, IL

Develop and maintain scalable full-stack applications using Java Spring Boot and React. Build REST APIs, integrate warehouse and logistics systems, and work with Apache Kafka event streams. Support legacy application modernization, distributed systems, microservices, relational databases, production troubleshooting, performance improvements, testing, code reviews, and cross-functional technical collaboration.

Develop, test, maintain, and support secure, scalable full-stack Java applications with Angular user interfaces. Write complex code and SQL, create technical designs and documentation, conduct code and design reviews, and ensure compliance with security, audit, regulatory, and SDLC requirements. Collaborate with architects and business partners in an Agile/Scrum environment, lead project delivery, mentor globally distributed junior engineers, and participate in on-call support.

Lead the architecture and modernization of a complex enterprise SaaS platform while remaining hands-on with critical software design and development. Define technical direction, improve scalability, reliability, security, performance, and maintainability, and guide design and code reviews. Partner across engineering and product teams, resolve complex technical challenges, establish engineering standards, mentor engineers, and translate architectural strategy into practical delivery.

Seeking a Java Developer with 5+ years of experience in Java development and proficiency in RESTFUL Web Services, JBoss, AngularJS, and MS SQL.

Seeking a Java Developer to create and support enterprise-grade applications. Responsibilities include coding, testing, and documentation while adhering to specifications.

Looking for a Java Lead with 7+ years of experience in Java/J2EE development. Must have strong knowledge in Core Java, Spring Framework, and message systems and ability to solve technical issues.

The Senior Java Web Developer will design, develop, test, and implement web and API-based software solutions while collaborating with a team and managing multiple priorities.

The Senior Java Web Developer will design, develop, and implement web and API-based software solutions, ensuring quality and adherence to standards.

Design and develop web and API-based software solutions, manage multiple priorities, and ensure compliance with best practices. Requires strong collaboration and communication skills.

Responsible for the development, testing, and deployment of complex solutions, collaborating with multiple teams and overseeing technical strategies and architecture. Lead engineering efforts, mentor engineers, and improve engineering standards.

Develop and maintain Java applications, preferably across the full stack. Use Hadoop and Python, with PCF and AngularJS experience preferred. Work within an Agile development environment and contribute to client application development initiatives.

Design, implement, test, and deliver scalable server-side Java services for a Highly Autonomous Driving map platform. Participate across the Agile lifecycle, work with big-data processing (Hadoop/MapReduce), and deploy to cloud environments using AWS, Docker, and Puppet.

Develop responsive websites and full-stack applications using Java, REST APIs, Git, JSON, front-end frameworks, microservices, messaging, and relational databases. Responsibilities include debugging, problem solving, following corporate standards, adapting to new technologies, and contributing within Agile development environments. SAFe Agile experience is preferred.

Design, develop, and maintain high-performance, secure Java backend services and APIs. Ensure reliability, scalability, and cost-efficiency across microservices, databases, messaging systems, and capacity planning. Troubleshoot, profile, benchmark, and optimize systems (including ML applications) and collaborate with Kazakhstan stakeholders.

Design, develop, test, and maintain Java backend services, APIs, microservices, and distributed systems supporting enterprise claims and payment solutions. Collaborate with product and business stakeholders, contribute to architecture, build CI/CD pipelines, operate containerized applications, and support production services through monitoring and troubleshooting. Apply clean code, TDD, automated testing, security, and Agile engineering practices while helping guide the platform’s technical direction.

The Java Developer will enhance data utilization for a state-run project, developing and integrating Java web applications using the Java Server Faces Framework and working with SQL databases.

Design, develop, test, deploy, and maintain scalable Java backend applications using Spring Boot and microservices. Build RESTful and SOAP integrations, optimize performance and reliability, implement security controls, and develop relational and NoSQL database solutions. Collaborate with architects, product owners, and frontend teams; participate in design reviews and architectural decisions; troubleshoot production issues; and uphold DevOps, CI/CD, coding, and Agile practices. Mentor junior developers and guide technical discussions across enterprise development teams.

Investigate and resolve data-quality issues in large-scale distributed systems. Design Java-based repair pipelines and idempotent correction jobs for high-volume datasets, debug existing code, use AWS services for queue-driven and batch workflows, optimize performance and concurrency, and communicate technical findings and risks to stakeholders.

Designs, implements, and runs Java Spring Boot microservices and REST APIs; leads design, CI/CD, TDD, performance tuning, security, and cross-product collaboration. Coaches teams and owns product KPIs and production support.

Lead architecture and implementation of device provisioning and lifecycle management services on GCP. Own APIs, scale Postgres/AlloyDB databases, integrate AI/LLM workflows (Anthropic Claude) for automation, mentor engineers, improve pipelines and tooling, and ensure high-availability, fault-tolerant designs.

Develop and design internet/intranet applications in Java, build user interfaces, integrate applications and databases, troubleshoot across environments, produce documentation, and stay current with web technologies while working directly with clients.

Develop, test, and maintain a complex distributed processing application using Python and Java. Collaborate with product owners, data coaches, analysts, DBAs, and Agile teams to meet backend/frontend requirements. Work with distributed workloads (Spark/Hadoop), SQL/Snowflake, AWS, shell scripting, and job scheduling/process automation. Support delivery under Agile/SAFe practices and ensure alignment with program standards.

Design, develop, and maintain web-based UI and REST middleware for federal health IT systems. Participate in Agile/SAFe ceremonies, write design documents, implement features, resolve bugs, and support CI/CD pipelines while collaborating with product, QA, and stakeholders.

Lead backend architecture and implementation for Java Spring microservices, validate and own AI-assisted code, mentor engineers, collaborate with product to deliver features, and drive technical excellence and scalable, test-covered systems.

Senior Java developer responsible for designing and building distributed, web-based applications using Java/J2EE. Work includes OOA/OOD, core business logic, APIs/frameworks, UI integration, SOA/web services, test-driven development, automation tooling, and working across Unix/Windows environments. Collaborate in agile teams and use modern frameworks and messaging/DB technologies.