Frontend engineer with fullstack range, moving into AI.

I design and ship interfaces that scale — accessible, fast, type-safe — and own the full stack behind them. Lately I have been building AI products: RAG pipelines, BYOK chat, and LLM integrations with Claude, DeepSeek & OpenAI.

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~/portfolio/me.json

{
  "name": "Josue Cortes",
  "role": "Senior Frontend Engineer · Fullstack & AI",
  "location": "El Salvador",
  "status": "Open to remote contract work",
  "stack": [
    "React 19",
    "Next.js 16",
    "TypeScript",
    "Tailwind v4"
  ],
  "backend": [
    "NestJS",
    "Postgres + pgvector",
    "Drizzle",
    "Inngest"
  ],
  "ai_tooling": [
    "OpenAI API | Claude API | DeepSeek API",
    "LLM Integration",
    "RAG pipelines"
  ],
  "now_building": "DocAI — chat with your documents (RAG · BYOK)"
}▋

What I do

Focus Areas

Performance

Building interfaces that load fast and stay fast — optimizing bundles, images, and rendering paths to meet real user expectations.

Accessibility

Writing semantic HTML, maintaining keyboard navigation, and testing with screen readers so products work for everyone.

Real-time UX

Designing optimistic updates, live sync, and responsive interactions that make collaborative tools feel instant.

AI Integration

Connecting LLMs to product workflows — streaming responses, RAG pipelines, and patterns that keep users in control of the model.

Where I've worked

Industry Expertise

Real Estate

Designing and developing scalable Microfrontend, enterprise-level platforms for managing real estate agent ecosystems, following strict Agile practices (Kanban/SCRUM).

Pharmacy Benefit Management (PBM) and Reimbursement Systems

Designing and developing scalable platforms for PBM and reimbursement systems. Managing complex healthcare ecosystems using Agile/SCRUM methodologies.

Financial Services

Designing, developing, and deploying Digital Banking platforms for a new financial institution. Integration of diverse government and private payment gateways across multiple channels, defining technical architecture scope, and championing Agile/SCRUM methodologies for project implementation.

Insurance Technology

Managed the implementation of core banking and insurance platforms, focusing on achieving regulatory compliance (Compliance) and robust transactional security protocols. Expertise in end-to-end claims and claims lifecycle management.

Featured work