Remote Java React Jobs in Crystal Lake, IL (NOW HIRING)

Optum Tech is a global leader in health care innovation. Our teams develop cutting-edge solutions that help people live healthier lives and help make the health system work better for everyone. From advanced data analytics and AI to cybersecurity, we use innovative approaches to solve some of health care's most complex challenges. Your contributions here have the potential to change lives. Ready to build the next breakthrough? Join us to start Caring. Connecting. Growing together.
We are seeking a Lead Software Engineer with solid hands-on experience building modern web applications using Go (Golang) and HTMX with a server-driven UI approach, while also being comfortable collaborating in environments that include .NET services and React front ends.
You'll enjoy the flexibility to work remotely * from anywhere within the U.S. as you take on some tough challenges.
For all hires in the Minneapolis or Washington, D.C. area, you will be required to work in the office a minimum of four days per week.
Primary Responsibilities:

• Drive end-to-end design and delivery of scalable full-stack applications using Go (Golang), HTMX (server-driven UI), and modern web architectures
• Provide technical leadership and mentorship, setting engineering standards and guiding teams through design, development, and delivery
• Own architecture and solution design, ensuring secure, resilient, and high-performing systems aligned with enterprise and cloud-native best practices
• Lead cloud engineering on Azure, designing and operating scalable solutions leveraging platform services (storage, messaging, identity, serverless)
• Champion DevOps and quality practices, including CI/CD, automated testing, and efficient release management
• Ensure operational excellence, including monitoring, performance tuning, incident management, and secure data handling
• Collaborate cross-functionally with product, business stakeholders, and teams working with NET and React ecosystems to deliver integrated solutions
• Promote innovation and productivity through adoption of AI-assisted tools (e.g., GitHub Copilot, M365)

You'll be rewarded and recognized for your performance in an environment that will challenge you and give you clear direction on what it takes to succeed in your role as well as provide development for other roles you may be interested in.
Required Qualifications:

• Bachelor's degree in Computer Science/Engineering (or equivalent practical experience)
• 8+ years of experience in full lifecycle software development in an agile environment
• Solid hands-on development experience with: Go (Golang) building services/APIs and web applications HTMX (or server-driven UI frameworks/patterns) for interactive web experiences
• Experience building and consuming RESTful web services
• Experience working with relational databases such as MS SQL / PostgreSQL (or similar)
• Working experience deploying/operating solutions in Microsoft Azure, including common Azure constructs (examples include storage, messaging, secrets, identity, functions)
• Experience with AI Tools like GitHub Copilot, M365
• Familiarity with CI/CD, DevOps practices, and containerization/deployment across environments
• Proven solid communication and collaboration skills across engineering and business stakeholders

Preferred Qualifications:

• Experience with Domain Driven Design, event-driven architecture, IaC/GitOps tooling (e.g., Terraform/Helm/Flux), Kubernetes fundamentals
• Familiarity with NET / NET Core services and patterns (integration, interoperability, or migration contexts)
• Familiarity with Java & SpringBoot
• Familiarity with React and modern TypeScript front-end patterns (micro-frontends, component-based UI)
• Knowledge of security best practices (OWASP) and awareness of regulated data handling concepts (HIPAA/PHI/PII) when applicable
• Observability and monitoring tools exposure (e.g., Splunk/Dynatrace/App Insights)

*All employees working remotely will be required to adhere to UnitedHealth Group's Telecommuter Policy
Pay is based on several factors including but not limited to local labor markets, education, work experience, certifications, etc. In addition to your salary, we offer benefits such as, a comprehensive benefits package, incentive and recognition programs, equity stock purchase and 401k contribution (all benefits are subject to eligibility requirements). No matter where or when you begin a career with us, you'll find a far-reaching choice of benefits and incentives. The salary for this role will range from $112,700 - $193,200 annually based on full-time employment. We comply with all minimum wage laws as applicable.
Application Deadline: This will be posted for a minimum of 2 business days or until a sufficient candidate pool has been collected. Job posting may come down early due to volume of applicants.
At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone-of every race, gender, sexuality, age, location and income-deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes - an enterprise priority reflected in our mission.
UnitedHealth Group is an Equal Employment Opportunity employer under applicable law and qualified applicants will receive consideration for employment without regard to race, national origin, religion, age, color, sex, sexual orientation, gender identity, disability, or protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations.
UnitedHealth Group is a drug - free workplace. Candidates are required to pass a drug test before beginning employment.