Federico H.

Demo profile

Full-stack Engineer - Real-time & WebSocket Apps

Córdoba, Argentina·7+ years·Spanish / English

Bio

I build apps where things happen instantly. 7 years working with WebSockets, real-time databases, and optimistic UI updates. From chat applications to collaborative tools to live dashboards. I understand the complexity of state synchronization and conflict resolution. Self-taught developer who started fixing computers and fell in love with real-time systems. My code is clean, my commits are atomic, my pull requests include context.

Skills

TypeScriptReactNext.jsNode.jsWebSocketsPostgreSQLRedisTesting

Work style

Fast iterationDetail-orientedGreat documentationSystems thinker

Portfolio (sample case studies)

Inventory Management Dashboard

Sample

Created real-time inventory system with stock alerts, purchase order automation, and multi-warehouse support.

Next.jsPostgreSQL

E-commerce Platform Rebuild

Sample

Modernized legacy shopping cart with Next.js, improving performance by 60% and conversion by 12%. Implemented server components for product pages and optimized checkout flow.

ReactNext.js

High-volume Background Job Processor

Sample

Architected reliable job processing system handling 100K+ tasks daily with proper retry logic, dead letter queues, and observability.

Node.jsRedis

Real-time Collaboration Dashboard

Sample

Built multi-user dashboard with live updates using WebSockets and optimistic UI. Handled conflict resolution and implemented robust offline-first architecture.

WebSocketsReactNode.js

SaaS Billing & Subscription System

Sample

Designed and implemented complete subscription management with Stripe. Handled proration, dunning, usage tracking, and admin billing tools.

Node.jsPostgreSQL

Analytics Dashboard for B2B SaaS

Sample

Created complex reporting dashboard with custom date ranges, exports, and drill-down capabilities. Optimized queries to handle millions of events.

ReactPostgreSQLTypeScript