Duration: 6 Months C2H (without sponsorship at ANY time)
Location: Philadelphia, PA (hybrid onsite Tue & Wed every week)
Rate: (Candidate must be ready for 45 days payment term)
Client: Medical Guardian
Interviews: 3 rounds, first 2 rounds are virtual & 3rd round is in person
Job Description
Principal Frontend App Developer, serving as the technical leader for the design and implementation of modern, scalable, and user-friendly applications. Will set coding standards, establish architectural patterns, and mentor a team of frontend developers while working closely with backend, AI/ML, and product teams.
Hands-on leadership focused on enabling a modular, multilingual, multi-brand digital platform supporting client customers. This role is expected to remain technically hands-on, contributing to architecture, proof-of-concepts, critical implementation efforts, and frontend platform engineering initiatives.
Will work closely with Product, UX, Platform Engineering, AI/ML, Security, and backend services teams to deliver seamless digital healthcare experiences at scale.
Required Skills & Experience
Technical Expertise
· Minimum of 8 years of professional frontend engineering experience
3+ years operating in a Principal, Staff, or Lead Engineer capacity with direct reports.
· Deep expertise in React.js, Next.js, TypeScript, JavaScript, and modern frontend architecture patterns.
· Strong experience building scalable applications using React Native.
· Experience integrating headless CMS platforms, preferably Sanity.io.
· Experience implementing authentication and identity solutions using OAuth2/OIDC platforms such as FusionAuth, Auth0, Okta, or Azure AD.
· Strong understanding of frontend state management, data-fetching, and caching architectures (React Query, Redux Toolkit, Zustand, Apollo, etc.).
· Expertise in responsive design, accessibility standards (WCAG 2.1+), and frontend performance optimization.
· Experience building and maintaining enterprise design systems and component libraries.
Architecture & Systems
· Experience designing and supporting multi-brand, multi-tenant frontend platforms.
· Strong understanding of microservices architectures and GraphQL/REST API integration patterns.
· Experience with Azure cloud services including App Services, Static Web Apps, CDN, and Blob Storage.
· Familiarity with CI/CD pipelines, containerization, and modern deployment workflows.
· Experience implementing frontend observability and monitoring solutions such as Datadog, Sentry, New Relic, or OpenTelemetry.
· Understanding of secure application development and regulated environment considerations.
Leadership & Collaboration
· Proven ability to mentor engineering teams and influence technical direction across organizations.
· Strong collaboration skills across product, UX, platform engineering, security, and executive leadership teams.
· Excellent communication skills with the ability to translate complex technical concepts into business outcomes.
Technology Stack
· React.js / Next.js
· React Native
· TypeScript
· Sanity.io
· FusionAuth
· GraphQL / REST APIs
· Azure Cloud Services
· Storybook / Design Systems
· GitHub Actions / Azure DevOps
· Datadog / Sentry / OpenTelemetry
Preferred Qualifications
· Experience building applications within healthcare, healthcare technology, or other regulated industries.
· Familiarity with HIPAA, PHI handling, HITRUST, PCI-DSS, or related compliance frameworks.
· Experience supporting multilingual and internationalized digital platforms.
· Familiarity with AI/ML-driven personalization, conversational UI, or intelligent engagement experiences.
· Exposure to Flutter or legacy hybrid mobile frameworks.
· Experience with Storybook, Figma integration workflows, and design token management.
· Experience with micro frontend architectures and edge delivery platforms.
