Joann Murillo portrait

Joann Murillo

Frontend & Full-Stack

Available for short-term & long-term contracts

I build polished web & mobile products that scale

I'm Joann — a Frontend Engineer and Full-Stack developer focused on performance, accessibility, and maintainable code. I ship production-ready React, React Native and cloud-backed systems used by businesses to drive measurable results.

Let's talk — hire me Download resume (PDF) View projects →
  • Experience: 5+ years
  • Languages: EN / ES
  • Remote: Available
  • Location: Honduras

Technology Stack

Comprehensive set of technologies I use to deliver full product lifecycles — from prototype to production.

Frontend

User interfaces & UX-focused implementations

  • Languages: JavaScript, TypeScript, HTML, CSS
  • Frameworks: React, Next.js, Vite
  • Mobile: React Native, Expo
  • Styling: Tailwind CSS, CSS Modules, Styled Components
  • Accessibility: WCAG, ARIA, semantic HTML

Backend & APIs

APIs, services and server-side engineering

  • Runtimes: Node.js, Deno
  • Frameworks: Express, NestJS, Fastify
  • API Design: REST, GraphQL (Apollo), gRPC
  • Auth: OAuth2, OpenID Connect, JWT, Firebase Auth
  • Caching: Redis, CDN strategies

Databases & Cloud

Reliable storage & infrastructure

  • Relational: PostgreSQL, MySQL, SQL Server
  • NoSQL: MongoDB
  • Cloud: AWS (Lambda, ECS, EKS, RDS, S3), GCP
  • Infra: Docker
  • CI/CD: GitHub

Testing & Quality

  • Jest, React Testing Library, Detox, Cypress, Playwright
  • Type checking with TypeScript, ESLint, Prettier
  • Performance audits: Lighthouse, WebPageTest

Observability & Productivity

  • Monitoring: Sentry, Datadog, Prometheus
  • Logging: ELK / EFK, CloudWatch
  • Project tools: Jira, Linear, Notion, Figma (design → dev collaboration)

Selected Projects

Production systems, mobile apps, and developer tools.

Lili's Delivery

Local delivery mobile app with country-aware payments, order validation and driver tracking.

  • Tech: React Native, Expo, Firebase, Stripe / MercadoPago integration, Google Maps, Google Routes, Google Directions
  • Highlights: Multi-country payment flows, robust order validation, push notifications and geolocation heuristics.
Google Play ↗ Book a demo
Lili's Delivery screenshot

Legajuu!

Document management platform for teachers to store, convert and format documents (PDF generation, image preprocessing, mobile-first).

  • Tech: React, Next.js, Node.js, Firebase
  • Highlights: Image-to-PDF pipeline, user-friendly mobile capture, automated naming and templates for administrative submissions.
  • Impact: Reduced time-to-apply by 80% for target users and removed dependence on external cyber cafes.
Live site ↗ Discuss similar project
Legajuu screenshot

Maythe's Sales

Marketplace app for small vendors to share products and manage sales.

Tech: React Native, Node.js, Firebase

View on Play ↗

Hompai

Grocery list & budgeting mobile tool designed to reduce overspending at the supermarket.

Tech: React Native, LocalStorage

View on Play ↗

Why hire me?

Product-led engineering

I focus on outcomes: faster iteration, measurable KPIs, and shipping features that delight users.

End-to-end delivery

From prototypes to production: frontend, APIs, infra, monitoring and CI/CD — I take projects across the finish line.

Mentorship & collaboration

Experienced collaborating with designers, PMs and engineers; I prioritize clear code and knowledge transfer.

Ready to collaborate?

If you're looking for a pragmatic engineer who delivers across the stack, let's schedule a call.

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