WSN

Hi, I'm

Wesley Sena Nogueira

Backend developer for 8+ years

Belém, PA — Brazil

Open to opportunities in Brazil and abroad.

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I've worked for

Day to day

  • Ruby on Rails
  • PostgreSQL
  • Kafka
  • Sidekiq
  • AWS
  • Microservices

About

Backend, payments and microservices

Backend developer with 8+ years of experience, working with Ruby on Rails since 2018. I've worked in fintech and payments, with microservices and integrations. Right now I'm studying Go.

Experience

Where I've worked and what I used

Blu · Software Engineer

Jun 2023 – Apr 2026

Payments and Accounts team · Jan 2025 – Apr 2026

  • Resolved a critical 3DS double-authentication incident in checkout.
  • Built an audit and tracking system for checkout states.
  • Cut sales report time from 120 s to 5 s by refactoring SQL and adding indexes.
  • Contributed to the Protege+ regulatory microservice, with integrations through Kafka, Sidekiq and STA web services over XML.
  • Ruby
  • SQL
  • Kafka
  • Sidekiq
  • Web Services (XML)

Mobile backend for a fintech · Jun 2023 – Dec 2024

  • Built and adapted 30+ API contracts during the migration from a monolith to microservices.
  • Rewrote the Farol de Crédito API, which queries credit bureaus and returns a customer's network (legal representatives and linked companies), reducing response time by more than 85%.
  • Built the Tap to Pay HTML receipts endpoint with AWS Lambda and S3.
  • Led the adoption of Insomnia as the API contract standard across teams.
  • Maintained the backend-driven mandatory app update mechanism.
  • APIs
  • Microservices
  • AWS Lambda
  • S3
  • Insomnia

Vindi · Software Developer

Jul 2022 – Apr 2023

  • Built and integrated Ruby on Rails features for digital account solutions in a microservices architecture.
  • Worked with asynchronous processing in Sidekiq and monitoring with CloudWatch and New Relic.
  • Wrote automated tests with RSpec and maintained Ruby gems.
  • Took part in refinements and technical documentation.
  • Ruby on Rails
  • Sidekiq
  • CloudWatch
  • New Relic
  • RSpec

Repassa · Backend Developer II

Aug 2021 – Jul 2022

  • Built and maintained Ruby on Rails applications with a component-based architecture.
  • Integrated GraphQL and REST APIs.
  • Set up email delivery with SendGrid, messaging with RabbitMQ and async processing with Sidekiq.
  • Monitored applications with Sentry and ELK and wrote tests with RSpec.
  • Took part in requirements analysis, documentation and code review.
  • Ruby on Rails
  • GraphQL
  • REST
  • RabbitMQ
  • Sidekiq
  • SendGrid
  • Sentry
  • ELK
  • RSpec

Jambu Tecnologia · Web Developer, Ruby on Rails

Aug 2018 – Aug 2021

  • Built web systems, APIs and views in Ruby on Rails, and created Ruby gems.
  • Built front-end features in Vue.js and integrated them with Rails APIs.
  • Tested with Capybara, Cucumber and Selenium WebDriver, plus manual testing.
  • Worked with Scrum, XP and Kanban, from requirements gathering to documentation (Markdown and UML).
  • Ran Git and Ruby workshops and mentored on Ruby on Rails and microservices.
  • Ruby on Rails
  • Vue.js
  • Capybara
  • Cucumber
  • Selenium
  • Git

Studies

Currently studying

  • Go

Education

Where I studied

  • Estácio · Bachelor's degree in Information Systems

    2019 – 2023

  • EETEPA Prof. Francisco das Chagas Azevedo · Technical High School Diploma in Informatics

    Mar 2015 – Mar 2019