Intern Frontend Web Developer Jobs in Chesterfield, MO

Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, and data they need to feel their best. Here, you will find a culture guided by diversity and inclusion, talented peers, comprehensive benefits, and career development opportunities. Come make an impact on the communities we serve as you help us advance health equity on a global scale. Join us to start Caring. Connecting. Growing together.
Position Summary
As a Sr. Software Engineer on the MCDS (Multi Channel Claim Distribution Platform) team within Optum Technology, you will play a key role in building, modernizing, and maintaining enterprise-class full-stack solutions across frontend and backend systems. MCDS is Optum's business-critical claim distribution platform that ingests payer remittance files, consolidates and routes payments and EOBs across print and digital channels, and exposes documents via the Client Access System (CAS) portal. In this role, you will drive key engineering initiatives under CCS 2.0, architecting and migrating legacy platform components to Azure native applications and REST APIs, orchestrating data workflows using Azure Data Factory (ADF), Databricks notebooks, Azure Service Bus, Azure SQL Managed Instance (SQL MI), and Delta Lake, leading the CAS UICL to Harmony UI migration, and designing and deploying AI-powered solutions and automations to streamline complex workflows. If you are an independent self-starter who excels in full-stack architecture, thrives on untangling complex legacy codebases, and is passionate about building cloud-native and AI-driven solutions, we want to hear from you.
You will enjoy the flexibility to telecommute* from anywhere within the U.S. as you take on some tough challenges.
Primary Responsibilities:

• Design, develop, refactor, and maintain enterprise full-stack web applications and microservices using React, Node.js, .NET, and Azure native cloud services
• Architect and execute cloud migration initiatives under CCS 2.0, transitioning legacy platform components to Azure native applications and RESTful APIs
• Orchestrate and manage enterprise data integration workflows, messaging, and pipelines utilizing Azure Data Factory (ADF), Databricks notebooks, and Azure Service Bus
• Design, implement, and optimize backend data persistence layers using Azure SQL Managed Instance (SQL MI) and Delta Lake architectures for high-performance claim and document processing
• Design, develop, and deploy AI-powered solutions, platform automations, and intelligent tools to address complex business challenges with an emphasis on responsible AI use
• Leverage enterprise-approved AI tools to streamline engineering workflows, automate repetitive tasks, and drive continuous development improvement
• Evaluate emerging cloud technologies and AI trends to inform solution architecture, system optimization, and strategic platform innovation
• Analyze complex legacy code and data flows to balance feature delivery with platform refactoring, technical debt reduction, and system stabilization
• Drive front-end modernization initiatives, including CAS portal service enhancements and UI migration to Harmony
• Collaborate across cross-functional scrum teams (AFF, ADF integration, CAS portal, QE) while maintaining strict security, disaster recovery, and regulatory compliance standards

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 CS or IT or Engineering related field
• 8 years of professional experience in software solution development
• 5 years of experience in front-end web development technologies and framework architecture
• 5 years of full-stack engineering experience working across React, Node.js, and .NET
• 3 years of experience in Single Page Application (SPA) architecture, front-end build environments, and build automation tools
• 3 years of experience configuring and managing Apache Tomcat web servers
• 2 years of hands-on experience building, migrating, and deploying cloud-native applications on Microsoft Azure
• 2 years of experience in orchestrating data integration workflows and messaging using Azure Data Factory (ADF), Databricks notebooks, or Azure Service Bus
• 2 years of experience working with Azure SQL Managed Instance (SQL MI) and/or Delta Lake data architectures
• 2 years of experience using Git for source code management and collaborative engineering
• 1 year of experience designing, developing, or deploying AI-powered solutions, automated tools, or smart workflows within application architectures

Preferred Qualifications:

• Experience in healthcare payment processing, remittance files, electronic document composition, and multi-channel delivery platforms
• Experience modernizing legacy enterprise systems into Microsoft Azure cloud-native microservices and RESTful API architectures
• Experience building complex end-to-end cloud data pipelines combining Azure Data Factory, Databricks, Azure Service Bus messaging, and Delta Lake in enterprise environments
• Practical experience leveraging AI-assisted coding tools, prompt engineering, or machine learning capabilities to enhance software engineering workflows
• Experience with Quadient document processing or enterprise output management systems
• Strong proficiency in automated unit and end-to-end testing frameworks across full-stack systems

*All Telecommuters 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 $91,700 to $163,700 annually based on full-time employment. We comply with all minimum wage laws as applicable.
Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.
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.
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