Top Senior Java Engineer Jobs in Chicago, IL

As a Senior Software Engineer on the Bank Payments team, you will lead technical projects, mentor engineers, and develop scalable Java-based web services while driving innovation in North America's core banking payment systems.

Design, build, and maintain developer APIs and tooling for Kafka; refactor Java/Spring code; implement CI/CD pipelines; ensure platform reliability and incident response; support high-volume Kafka platform operations; deploy secure cloud-native services on OpenShift using Kubernetes and observability tools like Datadog.

Join the US Bank Accounts team to design, build, and scale banking products. Own end-to-end projects, implement high-quality APIs and tooling, improve platform robustness, and collaborate across teams to deliver production services that handle large-scale distributed workloads.

Lead and architect full-stack cloud services and user experiences for credit card acquisition, mentor engineers, own deployments, and apply emerging AI/LLM technologies to drive product and engineering improvements.

Lead and deliver high-quality, secure, scalable Java-based services (Spring Boot/WebFlux); manage two scrum teams, act as hands-on tech lead (50% coding), design systems, improve operational stability, drive automation/CI-CD, evaluate vendor architectures, and lead engineering communities of practice.

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.

Lead an agile team to design, develop, and maintain secure, scalable Java/Spring Boot microservices. Produce high-quality code, drive architecture/vendor evaluations, automate remediation, promote AI-assisted engineering practices, and ensure operational stability and secure SDLC adoption across teams.

Lead and mentor a team building cloud-native, low-latency microservices and full-stack systems using Java/Go/AWS/Angular. Drive technical modernization, collaborate with product managers, ensure regulatory compliance, and occasionally code or evaluate implementations.

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.

Lead a portfolio of backend engineering projects and a development team to design, build, and operate distributed microservices and cloud-native solutions (Java, Go, Python). Mentor engineers, collaborate with product managers, ensure regulatory-compliant systems, and occasionally code or evaluate implementations.

Senior Full Stack Engineer for Grainger's Home Page and Display Customizations team. Build and maintain reusable React components, design and evolve backend services, improve observability and reliability, modernize legacy systems, and contribute to micro-frontend architecture. Mentor junior engineers, lead team projects, and collaborate with stakeholders to deliver high-quality customer-facing features.

Design, build, and deploy scalable full-stack applications to replace legacy PIM workflows. Manage and review AI coding agent output, enforce guardrails, implement CI/CD and DevOps best practices, and mentor junior engineers while collaborating with architects and product managers.

Design, build, and maintain scalable J2EE business applications. Implement features, fix bugs, participate in code reviews, automate tests, optimize performance, and produce documentation.

Lead development of Java/J2EE applications using Spring, Hibernate, Web Services, and WebSphere. Work with PL/SQL, Adobe Flex, unit testing, basic Unix, and follow SDLC processes.

Senior Java Developer on an agile team to design, develop, test, and deploy enterprise-grade Java/J2EE web applications. Ensure performance, security, scalability, maintain documentation, review requirements, propose solutions, and improve SDLC through TDD, CI/CD automation, code reviews, and collaboration with architects and stakeholders.

Lead modernization and migration of legacy Struts 1 applications to modern Java platforms. Design, develop, and maintain scalable Java 21 applications using Spring 6 and REST APIs, troubleshoot production issues, participate in code reviews, and collaborate with cross-functional teams to deliver high-quality software.

Lead reverse-engineering of TIBCO BW/MFT processes, document business rules, and reimplement them as modular Java/Spring Boot microservices. Migrate protocols to Kafka/RabbitMQ/REST, ensure data consistency, and perform performance testing to match legacy SLAs.

Design, develop, and maintain high-performance Java microservices using Spring Boot. Implement threading/concurrency, fault-tolerance (Hystrix/circuit breakers), observability (SLI/SLO), and event-driven solutions with Kafka. Deploy and operate services on Kubernetes and AWS, mentor junior developers, and collaborate with cross-functional teams to deliver reliable, scalable features.

Design and build Java/J2EE solutions using Spring and APIs; develop webservices, DB schemas, PL/SQL and transactional SQL in DB2/Oracle; collaborate with architects, developers and DevOps to implement CI/CD (Jenkins, uDeploy), ensure code quality (Sonar), perform code reviews and testing, resolve technical roadblocks, and drive process improvements. Requires strong communication and teamwork.

Develop and maintain core Elasticsearch infrastructure and shared platform features. Design scalable APIs, solve performance and concurrency issues, improve observability and CI/CD, automate developer workflows, lead cross-team projects, support complex operational investigations, and use AI to accelerate development and debugging.

The role involves improving Elasticsearch's distributed components, maintaining cluster coordination systems, and addressing complex issues to optimize performance and scalability.

Lead design, develop, deploy, and operate cloud-native fraud protection services on AWS. Implement secure, high-quality production code, automate infrastructure and CI/CD, monitor and optimize performance, apply AI-assisted engineering practices, and drive cross-team architecture, resiliency, and compliance for high-volume transactional systems.

Design, build, and maintain scalable, highly available backend services in Java. Own backend architecture, optimize performance, develop APIs and integrations, support production, conduct code reviews, and contribute to AI engineering tools and infrastructure.

Lead design, development, maintenance, and 24/7 support of Java-based web applications on WebSphere. Collaborate with analysts and architects, write DB2 stored procedures, conduct code reviews, create automated tests, troubleshoot production issues, and guide development iterations.

Design, develop, and integrate web applications using Java and related frameworks. Create UI, database architecture, technical specs, and code components. Coordinate with analysts and architects, conduct code reviews, troubleshoot across environments, and support agile development lifecycle.