Skip to content
Saullo.com

Saullo Bueno, from interface to code, works as...

Full Stack Developer

React • Node.js • UI/UX Design • React Native

ABOUT

I found my passion for technology after moving to the capital and getting my first computer, which started a journey of constant growth.

Child sitting on the floor stacking wooden blocks, in sepia tones

Born in Belo Horizonte, Minas Gerais, Brazil, I grew passionate about technology and design as a teenager, building my first digital interfaces.

I graduated in Multimedia Production in 2012 and worked at several companies in the field, evolving from graphic design and front-end into Full Stack software engineering.

A results-driven professional who combines a collaborative attitude, continuous learning and a strong sense of organization.

I stay persistent on complex problems, pay close attention to detail and commit to quality in every delivery.

SKILLS

A career built on design and UI/UX, consolidated in front-end development and specialized in Full Stack software engineering.

Design & UI/UX

Intuitive interfaces and visual identities focused on usability and user experience.

Back-end

Scalable APIs and services built around Clean Architecture and SOLID principles.

Front-End

High-performance SPAs and web applications with reusable components and responsive screens.

Tall tower of wooden blocks balanced on a light table

Mobile

Cross-platform mobile apps with high visual fidelity and performance.

Quality & CI/CD

Automated tests and continuous integration pipelines for fast, safe deliveries.

Architecture & Performance

Software best practices that ensure security, SEO and long-term maintainability.

SERVICES

Full command of the digital product lifecycle: from UI/UX design and visual identity to Full Stack and mobile development.

Design & UI/UX

Brands, visual identities and intuitive interfaces for web platforms and mobile apps.

Web Applications

Web ecosystems, dashboards and landing pages with clean, fast and scalable code.

APIs & Back-end

Efficient back-end services, data modeling, messaging and application containerization.

Mobile Applications

Development and publishing of mobile apps for iOS and Android.

A hand carefully pulling a block out of a wooden tower, in green tones

PROJECTS

Full Stack software engineering, modern web systems, AI-integrated solutions and high-performance applications.

Forge

AI Software Factory
Forge
Forge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshotForge - screenshot

A platform where AI agents receive engineering tasks, propose changes to real code and only apply them after a person approves. The execution timeline (plan, inspect, implement, test and review) updates live over SSE, and the approved patch is applied to an isolated copy of the repository. It includes multi-tenant RBAC, a complete audit trail, OpenTelemetry observability and AI cost control. It also ships Kanban tasks, global search, administration of users, roles, policies and agents, and secure sessions with revocation and 2FA.

  • Human in control: code writes by the AI wait for approval from a tech lead or admin
  • Multi-tenant with backend-validated RBAC, plus tool and agent policies configurable per organization
  • Per-project AI (mock, Groq, Gemini, Anthropic) with live streaming and versioned datasets in the Playground
  • RAG over real file indexing, hybrid ranking and prompt injection defense
  • Kanban tasks with dependencies, global search (Ctrl+K), notifications and single-use invites
  • Revocable sessions, TOTP 2FA, OpenTelemetry observability, CI with bundle budgets and e2e tests
Next.js 16NestJSReact 19TypeScriptPostgreSQLDrizzle ORMBullMQ / RedisOpenTelemetryVercel AI SDKMonaco EditorPlaywrightTailwind CSSTurborepo

FieldOps

Field Service Operations Platform
FieldOps
FieldOps - screenshotFieldOps - screenshotFieldOps - screenshotFieldOps - screenshot

A complete platform for managing, dispatching and executing field services. It offers smart crew routing, work order management, PWA support so technicians can work offline, and an integrated AI Copilot for operational support and real-time diagnostics.

  • Enterprise-grade pnpm / Turborepo monorepo with Next.js and NestJS
  • Smart dispatch and real-time work order management
  • Field technician support with offline operation (PWA) and automatic sync
  • Integrated AI Copilot for operational support, technical diagnostics and triage
Next.js 16NestJS 12React 19TypeScriptPostgreSQLPWA / Offline FirstVercel AI SDKTailwind CSS v4Turborepo

Nexus Developer Platform

Internal developer portal (IDP) for service catalog, deploys and incidents
Nexus Developer Platform
Nexus Developer Platform - screenshotNexus Developer Platform - screenshotNexus Developer Platform - screenshotNexus Developer Platform - screenshotNexus Developer Platform - screenshotNexus Developer Platform - screenshotNexus Developer Platform - screenshotNexus Developer Platform - screenshotNexus Developer Platform - screenshotNexus Developer Platform - screenshotNexus Developer Platform - screenshotNexus Developer Platform - screenshot

An internal developer portal (IDP): one place where engineering teams track the service catalog, deployments, incidents and observability (logs, traces and metrics) across the whole operation. It includes feature flags, CI/CD pipelines, real integrations with GitHub, Sentry, Grafana and Slack (with automatic fallback to demo mode) and an AI Engineering Copilot with real tool calling that only acts after explicit human approval.

  • 20 architectural implementation phases documented with 19 ADRs
  • AI Engineering Copilot with 16 real tools and human-in-the-loop
  • Real adapters for GitHub, Sentry, Grafana and Slack with automatic fallback
  • Advanced observability with ECharts graphs and trace waterfalls
  • Feature flags (boolean, percentage, per user/organization and rule-based) and Build → Tests → Security → Deploy pipelines
  • Realtime over SSE with toasts for deploys, incidents and AI runs, plus per-team KPIs (uptime, MTTR, deploy frequency)
Next.js 16React 19TypeScriptNestJS 12Drizzle ORMPostgreSQLVercel AI SDK v7Tailwind CSS v4Turborepo

Product Analytics OS

Product analytics tool to measure how a digital product is used
Product Analytics OS
Product Analytics OS - screenshotProduct Analytics OS - screenshotProduct Analytics OS - screenshotProduct Analytics OS - screenshotProduct Analytics OS - screenshotProduct Analytics OS - screenshotProduct Analytics OS - screenshotProduct Analytics OS - screenshotProduct Analytics OS - screenshotProduct Analytics OS - screenshotProduct Analytics OS - screenshot

A product analytics tool (in the style of PostHog, Mixpanel and Amplitude): a dashboard to follow how people use a digital product, with DAU, retention, activation funnel and churn metrics, drag-and-drop customizable dashboards, and cohort, funnel and user journey analyses. It also has an AI Analyst that automatically explains changes in those metrics, such as "why did conversion drop this week?", with root cause and evidence computed from the dataset itself.

  • Statistical AI Analyst with root-cause diagnosis and computed evidence
  • Customizable dashboards with drag-and-drop (dnd-kit) and persistence
  • Cohort (heatmap), Funnel, Segmentation and User Journey analyses
  • Deterministic synthetic data engine generated on the client
React 19ViteTypeScriptTailwind CSS v4Rechartsdnd-kitZustandReact Router

AI Customer Operations Platform

B2B customer support platform with automatic AI triage
AI Customer Operations Platform
AI Customer Operations Platform - screenshotAI Customer Operations Platform - screenshotAI Customer Operations Platform - screenshotAI Customer Operations Platform - screenshotAI Customer Operations Platform - screenshotAI Customer Operations Platform - screenshotAI Customer Operations Platform - screenshotAI Customer Operations Platform - screenshot

A customer support platform for businesses (B2B): a support inbox, in the style of Intercom + Linear, where tickets arrive, get organized and are answered by a team, with support for multiple companies on the same instance (multi-tenant). The AI is part of the real workflow: it classifies each ticket by sentiment and priority, looks up context in the knowledge base via RAG and suggests a reply using GroqCloud.

  • Natively multi-tenant architecture with RBAC and organization isolation
  • Automatic triage with AI (GroqCloud LLM) and RAG over a knowledge base
  • Asynchronous background queue with BullMQ and Redis
  • Real email notifications through the Resend API
Next.jsTypeScriptDrizzle ORMBetter AuthGroqCloud LLMPostgreSQLBullMQResendTailwind CSS

Command Center

Real-time operations center for a fleet of IoT devices
Command Center
Command Center - screenshotCommand Center - screenshotCommand Center - screenshotCommand Center - screenshot

An operations center that monitors thousands of simulated IoT devices in real time on an interactive map (MapLibre GL) with clustering, live alerts and telemetry in ECharts graphs. It features a virtualized table to handle large volumes, a Command Palette (Ctrl+K) to find any device, and an Event Replay mode that deterministically replays the state of the operation over a chosen time window.

  • High-performance interactive map with MapLibre GL and clustering
  • Deterministic Event Replay for time travel and incident analysis
  • Virtualized table for thousands of simultaneous devices
  • Keyboard-accessible Command Palette (Ctrl+K)
React 19ViteTypeScriptMapLibre GLTanStack QueryZustandTanStack TableEChartsMSWTailwind CSS v4

AI Workflow Studio

No-code visual editor to build AI automation workflows
AI Workflow Studio
AI Workflow Studio - screenshotAI Workflow Studio - screenshotAI Workflow Studio - screenshotAI Workflow Studio - screenshotAI Workflow Studio - screenshotAI Workflow Studio - screenshot

A no-code visual editor to build AI automation workflows (triggers → classification → conditions → actions), inspired by n8n. It has an infinite canvas with zoom/pan/minimap (React Flow), 5 configurable node types, simulated execution with a per-node log and duration chart, a JSON Inspector in Monaco Editor, and an AI Copilot that builds the entire workflow from a request written in plain language.

  • Interactive infinite canvas with React Flow and zoom/pan/minimap
  • AI Copilot (Vercel AI SDK + Groq) that generates workflows from natural language
  • Robust undo/redo with zundo and merged drag gestures
  • JSON Inspector (Monaco Editor) and performance chart (ECharts)
React 19ViteTypeScriptReact FlowZustandzundoZodMonaco EditorEChartsVercel AI SDKGroq

Legacy Projects

A history of visual identities, institutional platforms and projects built throughout my professional career.

Wide Cycling Ciclismo IndoorZoom Comunicação e Marketing DigitalBigráfica EditoraEspaço Divine Eventos

CONTACT

Have a project to build, want to hire my services or talk about opportunities? Let’s talk: