const server = new Server();await db.connect();app.listen(3000);export { router };return Response.ok();

petterson@dev: ~

$whoami

PettersonFirmino

$cat role.txt

_

$echo $SUMMARY

Building scalable backend systems with 5+ years of experience.
Specializing in high-volume APIs, payment integrations, and multi-tenant SaaS platforms.

./contact.sh>view experience

scroll

about()

developer.ts

interface Developer {
  name: "Petterson Firmino";
  role: "Backend Engineer";
  experience: "5+ years";
  location: "Brazil";
  remote: true;
}

const passion = [
  "Scalable architectures",
  "Clean, maintainable code",
  "Performance optimization",
  "Fault-tolerant systems"
];

I'm a Backend Software Engineer with a passion for designing and operating scalable systems that handle real-world complexity. My expertise lies in building high-volume transactional APIs, payment integrations, and multi-tenant SaaS platforms.

I architect idempotent, fault-tolerant services that balance performance, maintainability, and compliance. Experienced in Docker-based deployments, CI/CD pipelines, and collaborating with distributed teams across time zones.

Years Experience

Tickets Reduced

Conversion Increase

0k+

Daily Requests

experience()

Backend Developer

Studio Visual

Oct 2022 - Present

Remote

//Architected and led development of an omnichannel, multi-tenant customer support and CRM platform with payments/transactional APIs
//Designed Embedded WhatsApp integration, reducing support tickets by 80% and scaling to tens of thousands of daily requests
//Developed standalone microservice for real-time message processing using NestJS, PostgreSQL, and RabbitMQ
//Improved subscription flows for Revista Oeste, ensuring low latency under high concurrent user spikes
//Collaborated with cross-functional teams to raise conversion rates by 40%

Node.jsNestJSPostgreSQLRabbitMQTypeScript

Full-Stack Developer

Insus

Oct 2020 - Oct 2022

Remote

//Developed and maintained backend services with Node.js/TypeScript focusing on payment gateway integrations
//Delivered tailored solutions for SMEs including high-performance APIs and clean code practices
//Built custom dashboards and CRM features leveraging caching strategies and message queues

Node.jsTypeScriptPostgreSQLVue.jsRedis

skills()

Languages

TypeScriptJavaScriptGoPHPRubySQL

Frameworks

Node.jsNestJSExpressVue.jsNuxtJSReactRuby on RailsLaravel

Databases

PostgreSQLMySQLMongoDBSQLiteRedis

DevOps & Infra

DockerGitHub ActionsLinuxNginxAWSKubernetes

Specialties

{ }High-volume APIs

$Payment Integrations

~Idempotency & Fault Tolerance

#SaaS Development

@Microservices Design

*Database Modeling

contact()

contact@petterson: ~

$cat message.txt

I'm always open to discussing new opportunities,
interesting projects, or just having a chat about
backend architecture and scalable systems.

$echo $STATUS

Open to remote opportunities

pettersonfirmino.ofc@gmail.com->

github.com/hahuma->

linkedin.com/in/petterson-firmino->

@petterson_fs->