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welingtoncassis/README.md

Hi there, I'm Welington Assis 👋

Senior Software Engineer | AI-Native & Cloud Architecture

Specializing in scalable distributed systems, event-driven backends, and multi-agent AI systems.

LinkedIn AWS Certified Location


🚀 About Me

I am a Senior Software Engineer with 8+ years of experience building high-throughput, cloud-native backends and intelligent systems. My current focus centers on the intersection of robust distributed architecture and Generative AI applications—from multi-agent workflows and semantic search (RAG) to high-concurrency conversational commerce platforms.

  • 🛠 System Architecture & Cloud: Deep expertise in serverless architectures, event-driven design (AWS Lambda, SQS, SNS, DynamoDB), microservices, and container orchestration (Docker/K8s).
  • 🧠 AI-Native Engineering: Designing production-grade LLM architectures, multi-agent frameworks (Agno), LiteLLM multi-provider fallbacks (Gemini/GPT), vector databases, and semantic retrieval systems.
  • ⚡ Engineering Best Practices: Clean Architecture, Domain-Driven Design (DDD), CI/CD automation, and strict observability standards.

🧰 Tech Stack & Expertise

Core Languages & Backend

TypeScript Node.js NestJS Python

AI & Agentic Systems

LLMs & RAG Agno LiteLLM Vector DBs

Cloud, DevOps & Data

AWS Docker PostgreSQL MongoDB GitHub Actions


💼 High-Impact Deliveries & Architectural Experience

  • Conversational Commerce & AI Platforms: Architected and deployed production-grade Chat Commerce and agentic AI platforms leveraging WhatsApp Business APIs, LLM multi-model fallback routines, semantic caching, and real-time RAG pipelines.
  • Serverless Distributed Systems: Designed fault-tolerant serverless microservices on AWS (Lambda, API Gateway, DynamoDB, SQS), cutting operational latency and scaling effortlessly to large enterprise loads.
  • Full-Lifecycle Engineering: Led architecture decisions from schema modeling and API contract design to continuous delivery and production monitoring.

📫 Get in Touch

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    ## #1 Organize APIs ao longo de recursos
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    - Não usar verbos no nome da URI e sim substantivos que são os dados aos quais a API fornece acesso
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    - Ex: GET /v1/public/stories, GET /v1/public/stories/{storyId}/series, GET /v1/public/series
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