~ $ whoami

FULL-STACK

// Hi, I'm Bruno Vieira 👋

This page was made with care so you can get to know your future engineer. Thanks for visiting.

Senior Full-Stack & AI EngineerI turn complex problems into software that scales.

React / Next.jsNode / NestJSAI · LangGraphAWS · Docker · K8s
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Philosophy

Good code solves a real problem.

I start from the business problem and only write the first line when I know what it must deliver. A habit built over 25 years of listening to clients before proposing solutions.

Journey

Coding since 2020. Solving problems since 1987.

I started coding after 25 years understanding business from the inside. Every milestone below was built on that foundation.

  1. 1987–2020age 13 – 46

    Before the code

    25+ years of real worldBR · USA · IT · PT

    • B2B technical sales, my own companies and major accounts: 25+ years understanding businesses from the inside.
    • Lived and worked in 4 countries; 4 languages under my belt.
    • The business fluency that now guides my code: I understand the problem before the first line.
  2. 2020age 46

    Harvard CS50

    First lines of codePortugal

    • Started studying programming in Portugal, between rides as an app driver.
    • Harvard's CS50: computer science fundamentals.
    • First test pages in HTML and CSS, the beginning of the second career.
  3. 2020age 46

    TrueCoders

    Software Development BootcampBirmingham, USA · live, remote

    • Intensive 500+ hour, project-based bootcamp at a US school with live classes.
    • C#, .NET Core, ASP.NET MVC, MySQL, Git and HTML, solo and in teams.
    • The foundation in object orientation and strong typing I carry to this day.
  4. 2020–2024age 46 – 50

    Frontend, design & creativity

    Continuous immersion: the robustness needed to look good

    • With a solid backend foundation, I devoted myself to frontend and design: now I needed to build pages that were beautiful and efficient.
    • Rocketseat Ignite (2021–2023): immersive, advanced training in Node.js, React, Next.js and React Native with TypeScript, building full-stack applications end to end.
    • Deep JavaScript with Cod3r (async, functional, RxJS) and B7Web; frontend and UX/UI with Origamid; interface design and prototyping with Figma Descomplicado.
    • The creative finish: Bruno Simon's Three.js Journey (WebGL, shaders, 3D) and GSAP (high-performance animation). It's the layer you're seeing on this page.
  5. 2023age 49

    WB Digital Solutions

    Founder · the second career becomes a businessSão Paulo · Remote

    • Back in Brazil, I founded my software house: now it was about building for real, for real clients.
    • First clients and first products in production.
  6. 2023age 49

    Full Cycle

    Architecture, software engineering & DevOps

    • I went deep into software architecture and engineering: the foundation for building systems that scale.
    • DDD, clean and hexagonal architecture applied to hands-on projects.
    • And the DevOps world: Docker, Kubernetes and the culture of shipping code to production with confidence.
  7. 2023–2024age 49 – 50

    Data & AI

    A new tool and a new world arriving in force

    • It was impossible to ignore: AI was redefining what software means. So I went to study it in depth.
    • Data science, fundamentals and deep AI concepts at the Data Science Academy.
    • The foundation that today becomes AI agents (LangGraph, RAG) running in production.
  8. 2024age 50

    Go, Rust & infrastructure

    Learning straight from the source: documentation and targeted courses

    • With programming now mature, learning changed shape: official documentation and targeted courses on Alura and Udemy.
    • Go and Rust: modern, fast and safe backend languages for high-performance services.
    • Computer networking for DevOps (HTTP, DNS, sockets, Wireshark) and project management with SCRUM and GTD.
  9. 2023 – todayage 49 – 52

    Products in production

    From architecture to deploy, end to endBrazil · Italy · USA

    • Revalida Italia: a robust learning platform built from scratch, with classes in a 3D environment, API integrations and AWS hosting.
    • The studio's 3D website live: a scroll-driven experience with Three.js, living proof of the stack.
    • An AI-powered CRM that automates my own sales process: lead qualification, proposals and financial analysis.
    • Systems with AI agents (LangGraph, RAG) integrated into real products.
    • Cloud-native deploys on AWS with Docker, Terraform and Kubernetes, for clients in Brazil, Italy and the USA.
  10. 2025–2026age 51

    MBA in Software Engineering with AI

    Full Cycle · in progress

    • 400-hour MBA focused on the new engineer profile of the AI era.
    • Architecture in the AI era: agents vs microservices, MCP and A2A protocols, RAG and vector databases.
    • AI-driven development workflow, agent development (LangGraph, CrewAI), prompt engineering and DevOps/SRE with AI.
    • The formalization of a path I already practice in production: AI in the daily workflow and agents in real systems.
  11. 2026–2027age 52

    Postgraduate in Go Expert (Golang)

    Full Cycle · Lato Sensu · in progress

    • 360-hour lato sensu postgrad focused on advanced Go, from internals to production.
    • Internals and concurrency: runtime, goroutines, scheduler and garbage collector; channels, workers, mutex and race conditions.
    • REST, gRPC and GraphQL APIs with Clean Architecture and SOLID; real testing (unit, e2e, benchmarking and fuzzing).
    • Messaging with RabbitMQ and deploy with Docker/Kubernetes; special module with Robert C. Martin (Uncle Bob).
Skills

How I build.

Languages

TypeScriptJavaScriptPythonGoRustC#

Frontend

ReactNext.jsReact NativeThree.js / R3F & WebGLGSAPTailwind CSS

Backend

Node.js / NestJSGoRustDDD & Hexagonal ArchitectureREST / APIs & integrations

AI & Data

PythonMachine LearningNeural networks & TransformersLLMs & Computer visionLangGraph & LangChainRAG & AgentsStatistics & multivariate analysisTime series (Spark, Databricks)SageMaker & Microsoft FabricDashboards & data storytellingVector databases & embeddings (Pinecone)

AI-Driven Development

AI-driven workflow & agent modeClaude Code, Cursor & CopilotPrompt & Context EngineeringMCP (Model Context Protocol)Design docs as AI contextAI-assisted testing & code reviewAgent & LLM evaluation (Langfuse, LangGraph)Token caching & LLM cost control

Cloud & DevOps

AWSDockerTerraformKubernetesAnsibleLinuxCI/CDNetworking (HTTP, DNS, sockets)

Security

HTTPS/TLS, CSP & security headersOWASP: XSS, SQLi, CSRFAuthentication & authorization (JWT, OAuth, RBAC)Cryptography & password hashingAWS IAM & least privilegeVPC, security groups & firewallSecrets managementSSH & Linux hardeningRate limiting & API protectionDependency auditingLGPD & privacyBackups & recoveryOWASP Top 10 LLM & Gen AI (prompt injection, guardrails)
Projects

Built and shipped.

A selection of what left my hands and is running in production. Every project has a full case study on the studio site.

Revalida Italia

Revalida Italia

Learning Platform

A complete, tailor-made online learning platform — courses, video lessons, mock exams, smart flashcards with performance tracking, an interactive community and automatic certificate issuance — built on an enterprise architecture (NestJS, PostgreSQL, Redis and async queues) with thousands of automated tests and AWS infrastructure provisioned via Terraform and Ansible.

Next.jsNestJSTypeScriptPostgreSQLPrismaRedisBullMQAWS+3
View case
WB CRM

WB CRM

CRM & Sales Platform

A complete sales CRM: lead, contact and deal management on a kanban pipeline, cadences and activities, email (with warming) and WhatsApp campaigns, GoTo telephony with transcription, AI-agent call and meeting analysis, automations and proposals — on an enterprise architecture.

Next.jsNestJSTypeScriptPostgreSQLPrismaGoogle APIs+4
View case

AI Agents

Multi-agent System

A multi-agent AI system orchestrated with LangGraph: a router classifies intent and dispatches to specialized agents (CRM and finances) that act by connecting to the platform services. Powered by OpenAI and Anthropic models, exposed as a FastAPI service.

PythonFastAPILangGraphLangChainOpenAIAnthropic+1
View case
Vetor

Vetor

Income-Tax Review (Desktop)

A desktop app (Tauri + Rust + React) for reviewing IRPF (Brazilian income-tax) returns: it imports and parses .DEC declaration files from Receita Federal, extracts data per taxpayer (CPF) and tax year (taxable, exempt and exclusively-taxed income) and organizes it locally in SQLite — with device-bound licensing (JWT) and a NestJS licensing backend.

TauriRustReactTypeScriptSQLiteNestJS+3
View case

Finances

Finance & Investments

A complete personal finance and investments system: accounts, transactions, categories, cost centers, budgets and goals, recurring entries and invoices, contributions, a crypto portfolio and market data (B3, Yahoo Finance, Binance) — including the Magic Formula stock screener. Go backend (DDD) with a Next.js frontend.

GoNext.jsTypeScriptPostgreSQLPythonDocker+2
View case
Salto

Salto

Website & Proposals

Salto's multilingual website with protected sales decks (automation, websites, Google Business and service orders), briefing and service-order forms that generate PDFs and trigger automatic emails — GSAP animations, smooth scroll (Lenis) and event tracking.

Next.jsTypeScriptnext-intlGSAPLenisReact EmailResendjsPDF+1
View caseLive site
Building

Building now.

A product I am building right now. It is not in production yet and has no real users, but it shows how I think about product and engineering: what already runs and what is designed, honestly separated.

~/projects/treino-aliadoIn development

Treino Aliado

The differentiator: for curriculum-based modalities like jiu-jitsu, attendance reveals which techniques each student has already seen and flags churn risk, to grow and retain students, not just store data.

A multi-tenant SaaS to run academies end to end, with per-academy configurable modalities: from martial arts (jiu-jitsu) to weight training and other activities. It manages the academy, the students and the training, in a mini-startup model: sales page, self-service checkout and automatic provisioning of a subdomain per academy.

Not in production yet, no real users.

Already built and tested

  • Multi-tenancy and identity (the most mature context): academy as a Host-resolved tenant, people, roles (owner/professor/student), locally verified Ed25519 JWTs, rotating refresh tokens with reuse detection, idempotency and argon2 hashing.
  • Students: profiles, belt and graduation history, plans and membership status.
  • Training: ad-hoc and recurring classes, idempotent attendance check-in, techniques taught per class and private per-student professor comments.
  • Modalities: per-academy configurable catalog (from jiu-jitsu to weight training and other activities); this is what lets the platform serve academies of different kinds.
  • Insights (the differentiator): a read-model (CQRS) via a transactional outbox that derives each student's technique coverage, streaks and progress.
  • Quality: contract-first API (OpenAPI) with a CI drift gate, HTTP→Postgres integration tests and CI with lint, vet and gitleaks. 19 ADRs and design docs.

Designed, on the roadmap

  • Payments: Asaas (student→academy) and Mercado Pago (academy→platform).
  • Event broker (RabbitMQ) with a DLQ.
  • Community service (feed and posts) in NestJS.
  • Media upload with CDN; caching and rate-limiting with Redis.
  • Student app in React Native.
  • Marketing site with self-service checkout and automatic tenant provisioning.
  • White-label and per-academy theming; isolation with Postgres RLS.
GoDDDHexagonal architecturePostgreSQLCQRSNext.jsCaddyDockerOpenAPI
Languages

Four languages to work on any team.

  • PortugueseNative / Bilingual
  • EnglishFull Professional
  • ItalianFull Professional
  • SpanishProfessional Working

Currently learning: German (beginner)

About

Behind the terminal.

Divorced, I was married for 17 years, and from that story came my children: Gabriel, in Hamburg (Germany), and Stephanie, in Lisbon (Portugal). I talk to them every day.

Today I'm in Petrópolis (RJ), living a nomadic life through Airbnb. Over the past year I lived in towns on the northern coast of SP, in the south of MG, and now in Rio de Janeiro.

Reading

I read about 3 books a month, stoicism, Russian classics, personal development, health and much more.

Culture

A devourer of films and series. I love theater and live shows.

Sport & adventure

Jiu-jitsu, swimming (pool and open water), paragliding (pilot), hiking, weight training and cycling.

Remote setup

MacBook Pro M3 Max with 48 GB of RAM, two monitors (one ultrawide), mechanical keyboard, ergonomic mouse, headset and a gamer chair for comfort. On standby: a Mac mini running Ubuntu and a Windows laptop. The desk folds into a slim case: the office travels with me.

Study discipline

I study every single day: consistency is what matters. That's how the career change happened and how it continues, from German to whatever AI ships next.

Craft

Code is for people.

A machine will run anything; the ones who read, maintain and use it are people. I write for the end user and for the next dev after me.

Contact

Let's build something together.

The fastest way to reach me:

Download CVCV in English. For another language, switch the page language.
EmailGitHubLinkedInWhatsApp

Above all, what always works: hard work, done with a lot of love.

© Bruno Vieira · wbdigitalsolutions.com