Senior Full Stack Engineer

SergioNader

Full stack engineer with 20+ years building production SaaS applications. I combine deep architectural expertise with hands-on AI integration to ship products end-to-end — from database to deployment.

Live Project

AdaptAI.chat

A full-stack AI SaaS platform I built from zero to production. Compare and use 200+ AI models from OpenAI, Anthropic, Google & Mistral through a single unified interface.

Explore the platform
200+ AI Models
1,000+ Tests
100% API Coverage

What I Do

⚙

Backend Engineering

Production APIs and service architectures built for scale, with robust testing and clean separation of concerns.

Python FastAPI Laravel PostgreSQL Redis
◊

Frontend Development

Responsive, performant interfaces with modern tooling — from data-heavy dashboards to polished user-facing applications.

React Next.js TypeScript Chakra UI
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AI Integration

Multi-provider AI orchestration, real-time streaming, prompt engineering, and cost-optimized LLM integration into production products.

OpenAI Anthropic OpenRouter SSE Streaming
☁

Cloud & DevOps

End-to-end AWS infrastructure, CI/CD pipelines, automated backups, and production deployment workflows.

AWS Docker Nginx CI/CD
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SaaS & Payments

Full billing system architecture — subscriptions, credit-based pricing, proration, webhooks, and multi-tier monetization.

Stripe Subscriptions Credit Systems

Track Record

20+

Years Shipping Software

From eCommerce platforms and retail analytics to enterprise SaaS and AI products — across PHP, Ruby, Python, and JavaScript.

8yr

Remote at The Brandit Agency

Led full-stack development for enterprise B2B SaaS clients. Built APIs, React dashboards, and AWS infrastructure serving multiple high-traffic applications.

98%

Support Workload Reduction

Built an intelligent email automation system that cut per-ticket processing from 5 minutes to 5 seconds through automated parsing and routing.

SSO

Unified Auth Platform

Designed a custom JWT-based SSO consolidating multiple client systems into a single authentication platform serving thousands of users.

Let's Build
Something

Available for full-time remote roles, consulting, and collaboration on AI-powered products. Based in Orlando, FL with 8+ years of fully remote experience.

Email
LinkedIn
linkedin.com/in/sergionader
Location
Orlando, FL, USA · Remote