I design and ship interfaces that scale — accessible, fast, type-safe. Currently shipping four projects that show how I tackle real-world product problems end-to-end.
{
"name": "Josue Cortes",
"role": "Senior Frontend Engineer",
"location": "El Salvador",
"status": "Open to remote contract work",
"stack": [
"React 19",
"Next.js 15",
"TypeScript",
"Tailwind v4"
]
}-> What I do
Building interfaces that load fast and stay fast — optimizing bundles, images, and rendering paths to meet real user expectations.
Writing semantic HTML, maintaining keyboard navigation, and testing with screen readers so products work for everyone.
Designing optimistic updates, live sync, and responsive interactions that make collaborative tools feel instant.
Connecting LLMs to product workflows — streaming responses, RAG pipelines, and patterns that keep users in control of the model.
-> Where I've worked
-> Designing and developing scalable Microfrontend, enterprise-level platforms for managing real estate agent ecosystems, following strict Agile practices (Kanban/SCRUM).
-> Designing and developing scalable platforms for PBM and reimbursement systems. Managing complex healthcare ecosystems using Agile/SCRUM methodologies.
-> 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.
-> 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
Realtime Kanban with optimistic UI and full keyboard control.
// links coming soon
Chat with your documents — bring your own Anthropic key.
// status: not yet shipped
-> Let's connect
Interested in working together or just want to chat about frontend architecture? I'm always open to new opportunities and interesting projects.
jcortesdev@gmail.com