Luis Fernando (Luiz1nn) — Full Stack Software Engineer

LuisFernando

Luiz1nn

Full Stack Software Engineer

I design and build scalable full-stack products, AI-powered automations, and cloud-native systems that turn complex operations into simple, efficient digital experiences.

Made in Brazil

Focus

ReactNode.jsPythonAI/MLAWSKubernetes

Profile

Full Stack Software Engineer with 5+ years of experience building scalable applications, AI-powered systems, and cloud-native products. I work across backend, frontend, infrastructure, and automation, combining React, Next.js, Angular, Node.js, Python, Go, Docker, Kubernetes, GCP, and AWS to transform complex business requirements into reliable, high-performance software. My focus is delivering products that solve real problems, improve operational efficiency, and create measurable impact for companies, teams, and users.

2020 — Present

Selected Work

2024 — Present

Full Stack Software Engineer

INOV.AI TECH

  • Built and maintained AI-powered legal tech products, including Cadastro 4.0 and LAIS, focused on automating judicial workflows and reducing operational bottlenecks.
  • Designed end-to-end solutions across Angular front-end, Python and Go microservices, and Google Cloud/Kubernetes infrastructure, ensuring scalability, maintainability, and production reliability.
  • Optimized document analysis workflows in Cadastro 4.0, reducing processing time from approximately 5 minutes to 6 seconds and increasing operational efficiency by up to 98%.
  • Implemented cloud-native architecture practices using GCP, Kubernetes, APIs, and AI/ML integrations to support high-performance legal automation systems.
AngularPythonGoAI/MLGCPKubernetesMicroservices
2023 — 2024

Full Stack Software Engineer

UFT - Universidade Federal do Tocantins

  • Led the development and deployment of five critical on-premise institutional systems, improving internal operations across authentication, storage, and academic management workflows.
  • Built full-stack applications such as unified login, institutional storage, and enrollment management systems using React, Next.js, Node.js, and Python.
  • Designed scalable and maintainable software foundations for a new development unit, enabling better knowledge transfer, technical organization, and long-term system evolution.
  • Implemented agile development practices, modular architecture, and production-ready delivery processes to improve team execution and software quality.
ReactNext.jsNode.jsPythonOn-PremiseAPIs
2022 — 2023

Full Stack Software Engineer

Oxen

  • Built a complete delivery platform from scratch, covering customer-facing flows, administrative operations, order management, and business control features.
  • Designed and implemented scalable front-end modules with Angular and a backend API in C# using Clean Architecture principles.
  • Integrated PostgreSQL as the main database layer, ensuring reliable persistence, structured business data, and consistent platform operations.
  • Delivered a production-ready solution aligned with business needs, supporting the company's goal of launching a robust digital delivery product.
AngularC#Clean ArchitecturePostgreSQLREST APIsAzure DevOps
2021 — 2022

Full Stack Software Engineer

Nortesys

  • Developed and maintained the web interface for NTS Contábil, a tax management platform designed to simplify communication between companies and accountants.
  • Built modular and responsive Angular components integrated with a C# backend API, enabling real-time access to tax documents and fiscal data.
  • Optimized usability and performance for workflows involving high volumes of tax information, improving the accountant's ability to search, filter, and analyze company data.
  • Contributed to the modernization of document exchange processes, reducing dependency on email, spreadsheets, remote access, and manual communication.
AngularC#REST APIsResponsive UITax SystemsERP

Projects

Node.js Microservices

Event-driven microservices architecture built with Node.js, TypeScript, Fastify, RabbitMQ, PostgreSQL, Docker, Kong API Gateway, Pulumi, and OpenTelemetry. The system separates order and invoice services, using asynchronous messaging and distributed observability.

Node.jsRabbitMQPostgreSQLDockerKongPulumiOpenTelemetry
Open link

Zard UI

Contributed to ZardUI, an open-source Angular component library inspired by shadcn/ui, focused on accessible, customizable, and production-ready UI components. Worked within a Nx monorepo architecture using Angular, TypeScript, TailwindCSS, component-driven patterns, documentation workflows, reusable blocks, CLI tooling, and testing practices.

AngularTypeScriptTailwindCSSNxOpen SourceDesign System
Open link

Stoquei

Mobile-first inventory SaaS for small merchants, built with Next.js, TypeScript, Supabase, PostgreSQL, RLS, and shadcn/ui. The platform supports products, categories, stock movements, audit history, plan limits, and in-app low-stock alerts for active products.

Next.jsSupabasePostgreSQLRow Level SecurityMulti-tenant Architecture
Open link

Fast Feet API

Logistics backend API built with NestJS, TypeScript, PostgreSQL, and Drizzle ORM. It manages deliveries, drivers, recipients, authentication, delivery lifecycle workflows, nearby delivery search, proof-of-delivery uploads, and email notifications.

NestJSPostgreSQLCloudflare R2ResendDockerVitestOpenAPI
Open link

Tech Newsletter

AI-powered newsletter automation service built with Bun and TypeScript. It fetches RSS/Atom feeds, summarizes tech stories with OpenAI, renders HTML emails, and sends scheduled newsletters through Resend.

BunTypeScriptHonoOpenAIResendZodDocker
Open link

Let’s Connect

I collaborate with teams that care about craft and long-term product quality. Reach out for projects, consulting, or a thoughtful conversation.

luiscodes@outlook.com.br→
GitHub@Luiz1nnLinkedInLuis Fernando da SilvaX@_anak1nnTabNews@Luiz1nn