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amooesther/README.md

Hi, I'm Esther πŸ‘‹

Frontend Engineer Β· React Ecosystem Specialist Β· Healthcare SaaS

I turn complex product requirements into clean, performant interfaces that real users depend on.

Portfolio LinkedIn Email GitHub


About Me

Frontend developer with 3+ years building production-grade web applications β€” from HIPAA-compliant healthcare SaaS platforms to real-time logistics dashboards and enterprise clinical systems. I specialize in the React ecosystem, shipping work that performs in production, holds up under audit, and makes the next engineer's life easier.

Based in Ondo, Nigeria Β· Available for remote roles worldwide.


πŸ›  Tech Stack

Category Technologies
Core TypeScript Β· React 19 Β· Next.js 16 (App Router) Β· Tailwind CSS v4
UI & Motion Radix UI Β· shadcn/ui Β· Framer Motion Β· TipTap Β· Monaco Editor Β· DnD Kit Β· Recharts Β· Lucide
Data & Forms React Hook Form Β· Zod Β· TanStack Query Β· TanStack Table Β· Axios
Auth & Backend Firebase (Auth/Firestore) Β· REST API Integration Β· ActionCable (WebSockets)
State Management Redux Toolkit Β· TanStack Query
Infrastructure Cloudflare Workers Β· OpenNext Β· Wrangler Β· Docker Β· GitHub Actions (CI/CD) Β· Vite
Testing & Quality Vitest Β· Playwright Β· Testing Library Β· Sentry Β· ESLint Β· OpenReplay
Integrations Stripe Β· Stream Chat Β· Strapi Β· Google Places API Β· Telnyx Voice AI

πŸ’Ό Experience

Frontend Developer β€” WithinLabs Β· Healthcare Technology Β· Remote (Dallas, TX)

Apr 2025 – Present

WithinLabs is a SaaS platform for independent mental health practices. I'm the frontend engineer responsible for the admin portal, analytics infrastructure, and marketing platform.

API & Service Layer

  • Implemented and integrated 30+ RESTful API service modules against a Rails backend β€” billing, insurance, Stripe subscriptions, coupons/promotions, waitlist management, templates, and user management β€” each with full CRUD, Zod response validation, and TanStack Query cache management
  • Built on a reusable 4-layer architecture (Types β†’ Service β†’ Hook β†’ Page) adopted consistently across 25+ dashboard modules
  • Designed a parameterized query builder used across all paginated endpoints, supporting dynamic filtering, sorting, and shareable URL-based pagination state via nuqs

Stripe & Billing

  • Integrated Stripe billing APIs: subscription migrations with proration control, versioned billing products and plans, and full coupon/promotion code lifecycle (create, activate, deactivate, validate)

Insurance & Claims

  • Built the insurance API layer β€” usage analytics, payer directory, enrollment tracking, billable-status log monitoring, stale claims detection, and ERA report attribution
  • Delivered a CSV export endpoint with client-side file download

Authentication & Security

  • Implemented token-authenticated API calls with automatic refresh queue coalescing β€” eliminating concurrent refresh race conditions and improving interface responsiveness by 40%
  • HIPAA-compliant headers on every request; HttpOnly cookie-based refresh tokens with idle session timeout

Analytics & Marketing

  • Built a real-time analytics dashboard with timezone-aware KPI filtering (revenue, retention, no-show rate), SSR-safe Recharts rendering, and per-section error boundaries β€” zero PHI exposure
  • Shipped 24+ white-labeled Next.js marketing sites on a shared WCAG 2.1 AA-compliant component library with design-token theming and JSON-LD SEO

Infrastructure

  • Maintained multi-environment CI/CD pipelines via GitHub Actions, deploying to Cloudflare Workers via OpenNext
  • Wrote unit tests with Vitest/Testing Library and E2E coverage with Playwright

Frontend Developer Intern β€” Intern Pulse Β· SaaS Development Β· Nigeria

Oct 2024 – Mar 2025

  • Designed responsive components for an auction marketplace platform, increasing user engagement by 50%
  • Streamlined REST API integrations, decreasing data latency by 60% and reducing development cycles by 30% through reusable dynamic components
  • Partnered with design teams to align feature functionality with business objectives, ensuring on-time project delivery

Frontend Developer Intern β€” Afribreath Ltd Β· E-Commerce Β· Nigeria

May 2024 – Oct 2024

  • Improved e-commerce site performance using Tailwind CSS and TypeScript, boosting page load speed by 45%
  • Implemented real-time data rendering via API integrations, improving user experience by 30%
  • Improved team output by 25% through Git-based version control workflows and code review practices

πŸš€ Selected Projects

DispatchOS β€” Real-Time Logistics & Delivery Operations Dashboard

dispatch-os-lyart.vercel.app

A production-style logistics management platform built for delivery companies. DispatchOS gives operations managers a single live interface to monitor active deliveries, track drivers in real time, manage orders and customers, and understand performance through analytics β€” all without refreshing the page.

  • Real-time driver tracking and delivery status updates via WebSockets
  • Unified operations view: orders, customers, fleet, and analytics in one dashboard
  • Built for the kind of split-second decision-making that logistics ops actually demands

Health Tech Operations Hub β€” Enterprise Clinical Operations Dashboard

health-tech-operations-hub.vercel.app

An enterprise-grade clinical operations dashboard built to manage 50,000+ patient and clinical records with zero latency, monitor real-time triage telemetry, and design clinical automation flows using an interactive node-based workflow orchestrator.

  • Handles record volumes at enterprise scale without UI degradation
  • Real-time triage telemetry monitoring for clinical decision support
  • Visual node-based orchestrator for designing and managing automation workflows β€” think clinical logic as a flowchart, not a spreadsheet

Admin Dashboard β€” User & Analytics Management Interface

admin-dashboard-virid-six-46.vercel.app

A modern, responsive admin dashboard built with React 19, Vite, and Redux Toolkit. Provides a comprehensive interface for managing users, viewing analytics, and monitoring system activity.

  • Clean, composable component architecture with Redux state management
  • Analytics views and system activity monitoring
  • Fully responsive across device sizes

πŸ“Š By the Numbers

50,000+   Patient/clinical records handled with zero latency (Health Tech Hub)
   30+    RESTful API service modules integrated on a single platform
   25+    Dashboard modules shipped on a HIPAA-compliant EHR portal
   24+    Production marketing sites delivered for healthcare clients
   40%    Improvement in interface responsiveness via auth optimization
   60%    Reduction in data latency through API integration refactoring
   45%    Boost in page load speed on e-commerce platform
     0    Concurrent refresh race conditions in auth implementation

🧠 How I Think

  • Components should be composable, not clever
  • Design tokens and shared libraries keep UI consistent across teams and brands
  • Test what matters β€” Vitest for units, Playwright for E2E coverage
  • Correctness over cleverness β€” code your teammates can read without a tour
  • Ship things that actually work in production, not just in staging

πŸŽ“ Education & Certifications

πŸŽ“ Higher National Diploma, Computer Science Osun State Polytechnic
πŸ… Frontend Web Development Women Techsters Fellowship Β· Oct 2024
πŸ… UI/UX Design Trevotech Academy Β· Dec 2024
πŸ… Frontend Web Development Her Tech Trail Academy Β· Apr 2023

πŸ“« Let's Connect

I'm open to senior frontend roles, contract work, or just a good conversation about building things that matter.

If you work on products where quality and correctness are non-negotiable β€” healthcare, fintech, logistics, developer tooling, anything with real complexity β€” I'd love to hear from you.

πŸ“§ [email protected]

LinkedIn Email Me


TypeScript Β· React Β· Next.js Β· Tailwind Β· Cloudflare Workers Β· Open to Remote Roles

Pinned Loading

  1. Dispatch-OS Dispatch-OS Public

    TypeScript

  2. health-tech-operations-hub health-tech-operations-hub Public

    TypeScript

  3. admin-dashboard admin-dashboard Public

    JavaScript

  4. form_builder form_builder Public

    JavaScript