LUCAS HIAGO

Senior Software Engineer | Front-End Specialist | Architecture & Performance
lucashiago.dev@gmail.com | github.com/LucasHiago | linkedin.com/in/lucashdsf
Professional Summary
Senior Software Engineer with 10+ years building scalable web platforms and AI-powered systems for e-commerce, SaaS and enterprise clients. Strong expertise in TypeScript ecosystems and full-stack architecture with Nest.js, combined with hands-on experience integrating Large Language Models, building AI-driven features and designing production-ready AI workflows. Focused on performance, technical debt reduction and sustainable scalability, leveraging AI to automate processes, enhance decision-making and create intelligent product capabilities.
Technical Skills
Front-End: Angular (8x–19x), TypeScript, HTML5, SCSS, RxJS, Component Architecture, Design Systems
Back-End: Nest.js, Node.js, REST APIs, WebSockets, Sequelize
Data: PostgreSQL, MySQL, MSSQL, Data Modeling, Query Optimization
Architecture & Practices: SOLID, Layered Architecture, Clean Code, Refactoring, Technical Debt Reduction, Agile
Infrastructure: AWS basics, CI/CD concepts, Performance Tuning
Artificial Intelligence: LLM Integration (OpenAI API, local models via Ollama), Prompt Engineering, RAG Architecture, Embeddings & Vector Databases, AI Agents Concepts, ONNX Runtime, AI-driven automation workflows
Professional Experience
Supero (Outsourcing)
Mar 2021 – Present
Full-Stack Engineer
  • Developed and maintained enterprise applications using Angular and Nest.js
  • Led legacy refactoring initiatives migrating Java services to Nest.js improving maintainability
  • Designed and optimized relational database schemas (PostgreSQL, MySQL, MSSQL)
  • Improved code structure reducing technical debt and increasing scalability
Jet E-commerce
Feb 2021 – Nov 2023
Front-End Engineer
  • Developed scalable Angular front-end solutions for Virtuol Pro and NEO e-commerce platforms
  • Created customizable themes and modular components used by multiple stores
  • Participated in major version migrations improving performance and long-term sustainability
CARBEL – Alpes.one
May 2020 – Feb 2021
Front-End Engineer
  • Built full-stack landing pages and institutional websites using October CMS and Laravel
  • Developed semantic HTML, SCSS architecture and ES6 modules with maintainable structure
Open Digital
Front-End Engineer
  • Developed responsive and high-performance web interfaces
  • Applied modular CSS and JavaScript architecture improving maintainability
Selected Projects
Steply – SaaS Platform
Full-stack SaaS solution using Angular 19x, Nest.js and Socket.io.
TOTVS Support Portal Migration
Migrated Angular application from version 16x to 19x integrated with Zendesk and legacy Java services.
NEO E-commerce Framework v3
Led migration from Angular 8x to 16x improving performance and long-term maintainability.
AI Assistant & Automation Engine
Designed and implemented AI-powered workflows integrating LLM APIs for content generation, automation and intelligent data processing. Built structured prompt pipelines, backend orchestration in Nest.js and scalable REST endpoints for AI features.
Education
Technical Degree in Game Development | Universidade Salgado de Oliveira | Since 2016