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raulmn00/README.md

Raul Mariaci Neto

Senior Backend Engineer · Integrations · Node.js · TypeScript · Python · 🇧🇷
7+ years building reliable integrations and async systems for fintech and healthcare.

About

I design and own production backends focused on reliability — async pipelines, message queues, third-party integrations (credit bureaus, payment systems, AI providers), and the observability needed to debug them at 3 AM. Strong with Node.js/NestJS and Python/FastAPI; comfortable on the frontend when the project needs it.

Tech

Languages

TypeScript JavaScript Python

Backend & APIs

Node.js NestJS FastAPI

Async & Messaging — AWS SQS · BullMQ · GCP Pub/Sub · Redis · Dead-letter queues · Idempotent consumers

Databases

PostgreSQL MongoDB Redis Prisma

Cloud & Infra

AWS GCP Docker

CI/CD

GitHub Actions Bitbucket Pipelines

Frontend (when the project needs it)

React Next.js

AI tooling — OpenAI API · Azure Speech · Claude Code · Prompt Engineering · LLMs

What I work on

  • Third-party integrations that survive when the provider misbehaves — credit bureaus (Serasa, SPC, Bacen, Celcoin, Kanastra), payment systems, AI providers
  • Async pipelines processing 100k+ daily messages with zero data loss (AWS SQS + DLQs) and 50k+ daily jobs with BullMQ
  • Microservices on GCP Cloud Run sustaining 99.9% uptime for 10k+ concurrent users
  • Production systems debuggable from logs, not guesswork — structured logging, monitoring, incident response

Domains I've shipped in

  • Fintech — credit-analysis system integrating bureaus and financial institutions
  • Healthcare — medical transcription (Azure Speech) and clinical AI assistants (OpenAI)
  • EdTech & Marketing — large-scale async pipelines, caching, OAuth/SSO migrations

Contact

🇧🇷 Versão em português

Sobre

Projeto e mantenho backends em produção com foco em confiabilidade — pipelines assíncronas, filas de mensagens, integrações com terceiros (credit bureaus, sistemas de pagamento, provedores de IA) e a observabilidade necessária pra debugar tudo isso às 3 da manhã. Forte em Node.js/NestJS e Python/FastAPI; confortável no frontend quando o projeto exige.

No que trabalho

  • Integrações com terceiros que aguentam quando o provedor falha — credit bureaus (Serasa, SPC, Bacen, Celcoin, Kanastra), pagamentos, provedores de IA
  • Pipelines assíncronas processando 100k+ mensagens/dia sem perda de dados (AWS SQS + DLQs) e 50k+ jobs/dia com BullMQ
  • Microsserviços em GCP Cloud Run sustentando 99.9% de uptime para 10k+ usuários simultâneos
  • Sistemas de produção debugáveis pelo log, não por palpite — logging estruturado, monitoramento, resposta a incidentes

Domínios em que já entreguei

  • Fintech — sistema de análise de crédito integrando bureaus e instituições financeiras
  • Healthcare — transcrição médica (Azure Speech) e assistentes clínicos com IA (OpenAI)
  • EdTech & Marketing — pipelines assíncronas em escala, camadas de cache, migrações OAuth/SSO

Contato

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