Software Engineer — React, Next.js, TypeScript, NestJS, Rust. Building SaaS platforms, REST APIs, and native desktop apps.
📬 fergranados.dev@outlook.com · LinkedIn · GitHub · Codeforces
A full-stack multi-tenant SaaS for restaurant operations, built as a Turborepo + pnpm monorepo with a shared @nivora/shared TypeScript package.
Frontend — 5 specialized apps:
- 2 Next.js apps with SSR: customer-facing portal and public landing page
- 3 React + Vite SPAs: admin dashboard, restaurant dashboard, and inventory dashboard
Backend — NestJS 11 REST API with Hexagonal Architecture and 4 DDD bounded contexts: identity, restaurant, reservation, and billing.
Infrastructure:
- PostgreSQL 16 with PostGIS on AWS RDS
- Redis atomic locks (
SET NX EX) for concurrent reservation management - Stripe payment integration (SetupIntent + PaymentIntent flows)
A native desktop application that parses and balances chemical equations using a full compiler pipeline written in Rust.
Compiler pipeline (Rust 2021): Lexer → Parser (recursive descent) → Semantic Analyzer → Solver (Gaussian elimination with exact rational arithmetic — zero floating-point error)
Frontend — Vanilla HTML/CSS/JS inside a Tauri WebView with real-time visualization of all pipeline phases: tokens, AST, symbol table, and error catalog.
Architecture: Clean 3-layer design (Domain / Application / Interface), dual-interface (GUI + CLI) sharing one domain library. Rust ↔ JavaScript communication via Tauri IPC.
- Building and iterating on the Nivora SaaS platform
- Exploring systems programming with Rust
- Competitive programming on Codeforces
I started programming at 12 with Python, initially drawn to game development. Over time my interests shifted toward web and systems engineering. Today I work across the full stack — building React and Next.js frontends, NestJS REST APIs, and native desktop apps with Rust and Tauri. I care about clean architecture, performance, and writing code that lasts.
© 2025 Emmanuel Granados