Freelance Full Stack Java Developer Jobs in Illinois

Job Summary:
Deloitte is a leading professional services firm seeking an experienced Software Engineer III - Java Full Stack Developer to join their Value-Based Care initiative. The role involves technical leadership in building and enhancing Java/Spring-based services, developing responsive UI components, and ensuring secure and reliable performance in a healthcare environment.
Responsibilities:
• Join our Value-Based Care initiative focused on reducing overall healthcare costs while improving members' quality of life. Contribute across the application stack by building and enhancing Java/Spring-based services and APIs, developing responsive UI components, Python, integrating with clinical and claims data sources, and ensuring secure, reliable performance in a healthcare environment to enable care programs and analytics to drive better outcomes and cost efficiencies.
• Technical leadership: Own architecture and implementation across front-end (React) and back-end (Python), ensuring maintainability and scalability
• Data & database engineering: Design schemas, write and optimize complex SQL queries, manage migrations, and improve performance.
• Engineering excellence: Establish and enforce standards for code quality, testing, CI/CD, documentation, and observability (logging/metrics/tracing).
• Design, develop, and optimize scalable software for AI platforms and consumer devices.
• Integrate and automate load, stress, and real-user scenario testing into the development and production lifecycle.
• Analyze, monitor, and address performance, reliability, and scalability challenges in complex systems.
• Collaborate with engineers working on custom hardware, embedded systems, and cloud infrastructure.
• Apply advanced profiling, benchmarking, and system optimization techniques.
• Contribute to solution architecture, API design, security, and system integration.
• Communicate regularly with Engagement Managers (Directors), project team members, and representatives from various functional and / or technical teams, including escalating any matters that require additional attention and consideration from engagement management
• Independently and collaboratively lead client engagement workstreams focused on improvement, optimization, and transformation of processes including implementing leading practice workflows, addressing deficits in quality, and driving operational outcomes
Qualifications:
Required:
• 7+ years of experience in software, systems, or embedded engineering.
• 7+ years of experience working Java/J2EE
• 7+ years of experience Python (building APIs/services; common frameworks such as FastAPI/Django/Flask)
• 2+ years of experience in a lead role (tech lead, team lead, or equivalent) guiding engineering decisions and delivery.
• SQL (data modeling, query optimization, indexing, performance tuning)
• React (component design, state management, performance considerations)
• Experience with microservices, event-driven architectures, or distributed systems patterns.
• Familiarity with containerization (Docker) and orchestration (Kubernetes).
• Understanding of network protocols, security best practices, and scalable API design.
• Experience with Git, CI/CD pipelines, and modern DevOps practices.
• Experience working within Agile/Scrum development teams, participating in sprint planning, code reviews, and collaborative solutioning.
• Bachelor's degree, preferably in Computer Science, Information Technology, Computer Engineering, or related IT discipline; or equivalent experience
• Limited immigration sponsorship may be available
• Ability to travel 10%, on average, based on the work you do and the clients and industries/sectors you serve
Preferred:
• Experience developing or deploying AI solutions, custom hardware, or high-performance platforms.
• Proven ability to communicate complex technical concepts clearly and effectively.
• Analytical ability to manage multiple projects and prioritize tasks into manageable work products
• Can operate independently or with minimum supervision
• Excellent Written and Communication Skills
• Ability to deliver technical demonstrations
Company:
Deloitte is a business consulting company that offers audit, consulting, financial advisory, and tax services. Founded in 1845, the company is headquartered in London, GBR, with a team of 10001+ employees. The company is currently Late Stage.