Williams Mata R
I architect maintainable software systems with Hexagonal Architecture, DDD, and SOLID, integrating production-grade AI solutions.
Professional Profile
I am a Senior Software Engineer specializing in building distributed, scalable, and highly maintainable systems. My core strength lies in combining solid software architecture foundations (Hexagonal Architecture, Domain-Driven Design, and SOLID Principles) with cutting-edge AI capabilities (Hybrid RAG, Autonomous Agents, and LLM Orchestration). I ensure every AI integration is backed by a clean, decoupled, and production-ready architecture.
Professional Experience
Oct 2025 - Present
Oct 2025 - Present
Lead AI Engineer
Loadify (Logistics SaaS)
Architected an autonomous agent system based on ReAct loops and Tool-Calling to automate logistics operations. Integrated real-time voice agents (RetellAI) and complex n8n orchestrations, enabling the AI to execute calls, verify data, and handle errors autonomously under a resilient infrastructure, reducing manual operational load by 90%.
Mar 2024 - Oct 2025
Mar 2024 - Oct 2025
Lead Full Stack Developer
Cercademi
Spearheaded the end-to-end development of a mission-critical medical appointment ecosystem. Implemented complex payment orchestrations with MercadoPago and optimized database queries for high-concurrency handling. Reduced technical debt by migrating to a modular TypeScript architecture built on SOLID principles.
Jul 2023 - Feb 2024
Jul 2023 - Feb 2024
Full Stack Developer
Argxp
Developed 2 high-traffic web applications from the ground up using SCRUM. Engineered reusable component libraries and established CI/CD best practices, ensuring 99.9% deployment uptime and high-quality code standards through modular development and unit testing.
Core Expertise
Frontend & UI
TypeScript
React
Next.js
Tailwind CSS
Zustand
Backend & Cloud
Node.js
NestJS
Hexagonal Architecture & SOLID
Supabase
Prisma
Docker
Databases
PostgreSQL
MongoDB
Redis
AI & Automation
OpenAI & RAG
Gemini
RetellAI
OpenClaw
n8n
Featured Projects
Loadify AI - Logistics Orchestrator
Architected an enterprise B2B SaaS leveraging RAG agents to automate freight discovery. Integrated a real-time Voice AI agent for rate negotiation, resulting in a 90% reduction in manual operational time. Built with a focus on high availability, resilience, and cost-optimized LLM consumption.
TLDR Bot - RAG Assistant & Hexagonal Architecture
High-precision RAG system for Telegram chat histories, refactored using Hexagonal Architecture (Ports & Adapters). Decoupled the core RAG domain from AI providers and the presentation layer (Telegram/Discord), enabling seamless integration with new platforms with minimal code changes. Features Hybrid Search (semantic pgvector + lexical tsvector) and Re-ranking.
Event-Driven Microservices Architecture
Designed a scalable backend ecosystem using NestJS and NATS for event-driven inter-service communication. Implemented multi-database persistence (PostgreSQL, MongoDB) and Stripe integration for high-volume transaction processing, packaged with Docker for seamless orchestration.
Graggle - High-Concurrency Mini App
Native Telegram gaming Mini App engineered for mass user engagement. Built with Next.js Server Actions and Redis-backed async state management to handle real-time concurrency. Includes a real-time analytics dashboard for game economy monitoring and live tuning.
Karma Bot - Event-Driven Engagement
Micro-rewards and community engagement system for Telegram. Built with Node.js and MongoDB, optimized for real-time asynchronous event handling, lightweight persistence, and leaderboard analytics in high-traffic groups.
Contact
Let's build the future
Open for collaborations on software architecture, AI engineering, and high-impact Fullstack projects.