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andrepieresan/README.md

I'm Andre 👋

Software Engineer | Agentic Engineer

I build and operate B2B SaaS platforms, AI-assisted engineering workflows, automations, crawlers, and high-volume integrations.

With 7 years of experience in software engineering and 9 years in technology, I work across the full development lifecycle—from architecture and product decisions to deployment, observability, and production operations.

My background combines engineering, product, and business perspectives, with a focus on modernizing legacy systems, improving operational resilience, and delivering scalable solutions for complex environments.

What I Do

  • Design and evolve multi-tenant B2B SaaS platforms
  • Build robust APIs, automations, crawlers, and system integrations
  • Modernize legacy applications while preserving business rules
  • Develop resilient data processing and integration workers
  • Operate Docker and Kubernetes workloads in production
  • Apply Agentic Engineering with human oversight, guardrails, and evidence-based validation

Tech Stack

Languages & Runtimes

Backend & Frontend

Data & Infrastructure

DevOps & Delivery

Additional experience with Fastify, Helm, SOPS, K9s, Puppeteer, n8n, Evolution API, Salesforce Lightning, Vitest, REST, OpenAPI and Webhooks.

Selected Work

🚗 GETOS

Multi-tenant B2B SaaS platform for service-order management.

Led its architecture and evolution from technical design to production operations, including service workflows, warranty management, repair timelines, auditing, business KPIs, and company and branch contexts.

Technologies: Vue 3, Quasar, AdonisJS, Fastify, MySQL, MongoDB, Prisma, Docker, Nginx and Vercel.

🌐 Visit GETOS

🔄 Automotive Integrations

Development and operation of crawlers and integrations connecting dealerships, CRMs, and automakers.

The ecosystem includes resilient Bun and TypeScript workers, Puppeteer automation, Salesforce Lightning, SSO/OAuth, caching, retries, concurrency control, deduplication, Kubernetes workloads, and automated integration validation.

🤖 CRM, Automation & Agent Modernization

Modernization of CRM and automation workflows through native NestJS and Fastify APIs, multi-tenant backends, WhatsApp integrations, request tracing, parity testing, and conversational-agent continuity strategies.

🗺️ Organizational Hierarchy & Data Journey

Implementation of territorial hierarchies, user management, lead and member journeys, RLS policies, RPCs, deterministic local data, and permission and integrity validation using React and Supabase/PostgreSQL.

Agentic Engineering

I use AI agents throughout the engineering lifecycle to:

  • Decompose complex problems
  • Explore and understand existing codebases
  • Plan and implement changes
  • Validate behavior with tests and evidence
  • Document decisions and operational procedures
  • Coordinate multi-agent workflows with human oversight

Connect

LinkedIn

GitHub

Email

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  1. api_fastify api_fastify Public

    API SIMPLES, EXEMPLO DE UTILIZAÇÃO FASTIFY+PRISMA+SQLite

    TypeScript 1

  2. api_adonis api_adonis Public

    API SIMPLES, EXEMPLO DE UTILIZAÇÃO ADONIS+LUCID+SQLite

    TypeScript 1

  3. app_quasar app_quasar Public

    APP SIMPLES DE EXEMPLO UTILIZANDO TYPESCRIPT COM QUASAR FRAMEWORK

    Vue 1

  4. contact contact Public

    CSS