Williams Mata R
I architect scalable distributed systems and high-performance software solutions, integrating advanced AI architectures like RAG and Agentic workflows.
Professional Profile
I am a Senior Software Engineer with a focus on building robust, scalable, and maintainable applications. My core expertise lies in modern Fullstack development (Next.js, NestJS, PostgreSQL) and distributed architectures. I specialize in elevating traditional software by integrating AI-native capabilities, such as RAG systems and autonomous agents, ensuring that innovation always serves business scalability and clean code standards.
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, which reduced 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.
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 rigorous unit testing.
Core Expertise
Frontend & UI
TypeScript
React
Next.js
Tailwind CSS
Zustand
Backend & Cloud
Node.js
NestJS
Supabase
Prisma
Docker
Databases
PostgreSQL
MongoDB
Redis
AI & Automation
OpenAI & RAG
Gemini
RetellAI
OpenClaw
n8n
Featured Projects
Loadify AI - Logistics Orchestrator
Architected an end-to-end B2B SaaS that leverages 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 and cost-optimized LLM consumption.
TLDR Bot - Advanced RAG Assistant
A high-precision RAG system for massive Telegram chat histories. I optimized information retrieval by implementing Hybrid Search (combining pgvector semantic search and tsvector lexical search) with a Re-ranking layer. This architecture ensures highly relevant context for the LLM while significantly reducing token costs and latency.
Event-Driven Microservices Architecture
Designed a scalable backend ecosystem using NestJS and NATS for 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 state management to handle real-time concurrency. Includes a real-time analytics dashboard for game economy monitoring and live tuning.
Karma Bot
Karma Bot is a simple Telegram bot for tracking karma points in a group chat. Users can give each other karma points by responding to messages with +1 or -1. The bot also provides commands for checking a user's current karma score and for seeing a leaderboard of the top users with the most karma. Built with Node.js and MongoDB.
Contact
Let's build the future
Open for collaborations on high-impact AI and Fullstack engineering projects.