Fabrizio Zaffarana
Backend Software Engineer

Technical

Node.js

TypeScript

Hono

GraphQL

PostgreSQL

MySQL

MongoDB

Redis

Weaviate

Supabase

AWS

GCP

Cloudflare Workers

Serverless

Docker

Terraform

LangGraph

LangChain

Experience

Backend Software Engineer, Rocket Lab, March 2025 - Present

Backend services development for mobile ad-tech platform using Node.js, TypeScript, and AdonisJS
Real-time data pipelines, queue-based processing (BullMQ/SQS), and AI integrations with LangChain

Backend Software Engineer, Smoot, May 2023 - March 2025

AWS infrastructure management and cost optimization
Node.js API development and event-driven serverless architectures (AWS Lambda)
Analytics and data pipeline development
Integration of AI services including OpenAI and Google Cloud AI
Implementation of vector databases (Weaviate) for semantic search and retrieval

Backend Software Engineer, Mixmax, February 2022 - May 2023

Led DX (Developer Experience) initiatives: built internal tooling and CI/CD workflows to improve cross-team development velocity
AWS infrastructure management and cost optimization
Node.js API development and event-driven serverless architectures (AWS Lambda)

Backend Software Engineer, Palabra, February 2021 - February 2022

Monolith-to-microservices migration on AWS
SQL and NoSQL database management
Event-driven serverless architecture design (AWS Lambda)

Backend Software Engineer, Pruvo, August 2020 - February 2021

Built integration services connecting the platform with multiple hotel suppliers
Serverless data pipeline development (AWS Lambda, Node.js)

Backend Technical Lead, Backend Software Engineer, Worcket, January 2019 - August 2020

Feature design, analysis, and implementation
Serverless pipeline development (AWS Lambda, Node.js)
SQL and NoSQL database management
Engineering team leadership (3 developers)

Backend Technical Lead, Backend Software Engineer, Headway Digital - Marketing powered by Technology, September 2017 - January 2019

High-performance API design and development
Event-driven serverless architecture design (AWS Lambda, Node.js)
SQL and NoSQL database management
Engineering team leadership (4 developers)

Backend Technical Lead, Full-stack Developer, PlayTown S.A, January 2013 - September 2017

PHP and Node.js API development
Custom internal tooling for multiple business areas
Mobile game and app development for Android and iOS using Ionic Framework, React Native, and Unity3D

Education

System Analyst Degree, Instituto Tecnologico Beltran

Languages

Spanish, Native

English, Upper intermediate (B2)

Personal Projects

Lechuga App, https://lechuga.app

Real-time and historical exchange rates for Argentina. Track USD Blue, MEP, CCL, crypto, and more with interactive charts and price evolution.

All The Tools, https://www.allthetools.online/

Free online developer utilities for converting, formatting, and transforming data (JSON to CSV, Base64, JWT Decoder, and more).

Rust Combat Log Parser, https://www.rustcombatlog.com/

Full-stack web app that parses Rust game combat logs into interactive visualizations with shareable links and PNG export. Built with Next.js, TypeScript, and MongoDB.

SiteSpy, https://rapidapi.com/fzaffarana/api/sitespy

High-performance crawler that discovers and extracts all URLs from sitemaps, RSS feeds, and hidden site structures.

Smart Web Scraper, https://rapidapi.com/fzaffarana/api/smart-web-scraper

Extract readable content, metadata, OpenGraph tags, and SEO information from any public webpage.

URL to Markdown for AI, https://rapidapi.com/fzaffarana/api/url-to-markdown-for-ai

Convert any URL to clean, LLM-ready Markdown with RAG-optimized semantic chunking, token-aware splitting, and content quality scoring.

Web Content Analyzer & Summarizer, https://rapidapi.com/fzaffarana/api/web-content-analyzer-summarizer

AI-powered content extraction with structured summaries, sentiment analysis, entity recognition, and content classification from any URL.

Web Authority Score, https://rapidapi.com/fzaffarana/api/web-authority-score

Calculate a 0–100 authority score for any website based on content coverage, freshness, quality, technical health, and SEO.

Website Due Diligence, https://rapidapi.com/fzaffarana/api/website-due-diligence

Comprehensive trust and quality report covering DNS, SSL, security headers, content analysis, and domain age with a composite trust score.

Code to Image, https://rapidapi.com/fzaffarana/api/code-to-image

Render code snippets into styled PNG images with 22+ language support, 10 color themes, syntax highlighting, and macOS-style window chrome.

Code Transform, https://rapidapi.com/fzaffarana/api/code-transform

Convert between code and data formats in one endpoint: JSON to/from TypeScript, YAML, XML, CSV, JSON Schema; Markdown to/from HTML; HTML to JSX.

Diagram Render, https://rapidapi.com/fzaffarana/api/diagram-render

Render Mermaid diagram syntax into SVG or PNG. Supports flowcharts, sequence diagrams, ER diagrams, Gantt charts, mindmaps, and more.

Cron Toolkit, https://rapidapi.com/fzaffarana/api/cron-toolkit

Validate, explain, and calculate cron expressions. Supports Unix (5-field), Quartz (6-field), and AWS (7-field) formats with timezone support.

Schema Markup Validator, https://rapidapi.com/fzaffarana/api/schema-markup-validator

Extract and validate Schema.org structured data (JSON-LD, Microdata, RDFa) against Google Rich Results requirements with quality scoring.

OG Image Generator, https://rapidapi.com/fzaffarana/api/og-image-generator

Generate custom Open Graph images for social media previews with configurable layouts, colors, and typography.

Accessibility Audit, https://rapidapi.com/fzaffarana/api/accessibility-audit

WCAG 2.2 Level AA accessibility checker that returns a detailed audit with score, categorized issues, and actionable fix suggestions.

Content Safety, https://rapidapi.com/fzaffarana/api/content-safety

Content moderation API for detecting unsafe, harmful, or inappropriate text and images.

Disposable Email Detector, https://rapidapi.com/fzaffarana/api/disposable-email-detector

Detect disposable and temporary email addresses against 196,000+ known domains with typo detection, MX validation, and domain age analysis.

Email Auth Auditor, https://rapidapi.com/fzaffarana/api/email-auth-auditor

Validate email authentication records (SPF, DKIM, DMARC, BIMI, MTA-STS) with compliance scoring and copy-pasteable DNS fix records.

Financial Validator, https://rapidapi.com/fzaffarana/api/financial-validator