Client prefers local candidates and will not accept candidates that aren't already located in Pennsylvania if not Philadelphia.
This requirement is C2H, add lines to the submission template: "Willing to convert to FTE (end client) after 6 months: Yes/No" & another line with expected salary range at conversion to FTE.
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.
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