Hi, my name is

Edcleidson S. C. Junior

I am changing a bit of the world with code.

It’s a pleasure having you around here. I hope you enjoy my work.

About Me

With more than 4 years of experience, I delivered projects for national banking and retail sectors.

I successfully led a migration to near real-time architecture from conception to production. Also delivered the Mobile Token security project, preventing billions in fraud and strengthening customer confidence.

I built and maintained LGPD-compliant systems with sensitive data, implemented crucial features for more than 100 million end customers, and significantly improved code quality, achieving 80% test coverage on projects that initially had 0%. I also supported team leadership and technologies such as Java and Spring Webflux.

Here are a few technologies I've been working with recently:
  • Java
  • Kotlin
  • Go

Experience

Backend Software Developer / Engineer - Grupo Boticário
Jan 2023 - Present
  • Led a near real-time architecture for stock update integrations between ERPs, stores, and omni systems from conception, deadline, and scope deals to production.
  • Temporary Backend Tech Leader while official tech leader is in PTO, working in couple with a frontend temporary TL.
  • Delivered a contingency feature that enables the company to sell and deliver when third-party logistics services are unavailable.
  • Drive security improvements and block security breaches in code for Omniteam.
  • Gave tech talks about LocalStack, JUnit, and Dynamic Tests.

Skills: Java · Kotlin · Amazon Web Services (AWS) · Node.js · JavaScript · Fastify · Gradle · Spring Boot · Spring Webflux · JPA · SQL · PostgreSQL · MongoDB · Apache Kafka · RabbitMQ · Terraform · GraphQL · REST APIs · Amazon SQS · AWS Lambda · Amazon Simple Notification Service (SNS) · JUnit · Mockito · Test-Driven Development (TDD) · Testes Unitários e Integrados (Unit Tests and Integration Tests) · Arquitetura Distribuída (Distributed Architecture) · Continuous Integration and Continuous Delivery (CI/CD) · Agile Methodologies · Kanban · Scrum · Design Patterns · SOLID Design Principles · Domain-Driven Design (DDD) · Microsserviços (Microservices) · Spring Framework · Git · Docker · Jenkins · New Relic · Object-Oriented Programming (OOP)

Volunteer Mentor | Tutor | Instructor | Advisor to Devs (NodeJS) - SouJunior
May 2023 - Present
  • Helping people with few or no experience developing real projects with advisors, code review, best practices, soft and hard skills.

Skills: Node.js · JavaScript · Fastify · REST APIs · Testes Unitários e Integrados (Unit Tests and Integration Tests) · Continuous Integration and Continuous Delivery (CI/CD) · SOLID Design Principles · Microsserviços (Microservices) · Git · Docker · Object-Oriented Programming (OOP)

Backend Software Developer / Engineer - Sicredi
Jun 2022 - Jan 2023

Delivered Mobile Token project, which is a critical feature to the company due to prevent security frauds.

  • Owned a server-driven UI BFF delivering data for Android and IOS using Java and Spring Webflux

  • Negotiated deadlines and scopes, was on-call, made deployments, code review and tech talks.

  • Gave tech talks about localstack, and dynamic tests.

  • Designed parts of the BFF API flow.

Skills: Java · Kotlin · Amazon Web Services (AWS) · Gradle · Spring Boot · Spring Webflux · JPA · PostgreSQL · REST APIs · JUnit · Mockito · WireMock · Test-Driven Development (TDD) · Testes Unitários e Integrados (Unit Tests and Integration Tests) · Continuous Integration and Continuous Delivery (CI/CD) · Agile Methodologies · Kanban · Design Patterns · SOLID Design Principles · Microsserviços (Microservices) · Spring Framework · Git · Docker · Jenkins · New Relic · Kubernetes · Object-Oriented Programming (OOP)

Backend Software Developer / Engineer - Americanas SA
Jun 2021 - May 2022

Worked in customer group set of microservices to handle sensitive data from bureaus according LGPD (similar to European GDPR) rules.

  • Owned the legacy My Account APIs group creating tasks, developing, reviewing, testing, deploying, and attending meetings to quantify deadlines.

  • Made bash and Scala scripts for changing more than 100 million database documents.

  • Increased test coverage and improved the team code quality by implementing SonarQube in a team of 8 people and 10 microservices APIs.

  • Implemented critical features and microservices to more than 150 million customers, like LGPD rules, bureau validations, and social work.

  • Saved company money helping implement localstack lib to mock aws.

  • Gave tech talks about competitive programming, DFS, BFS and BigO.

Skills: Java · Amazon Web Services (AWS) · Go · Gradle · Spring Boot · JPA · MongoDB · Apache Kafka · REST APIs · Amazon SQS · Amazon Kinesis · Amazon Simple Notification Service (SNS) · JUnit · Mockito · WireMock · Test-Driven Development (TDD) · Testes Unitários e Integrados (Unit Tests and Integration Tests) · Arquitetura Distribuída (Distributed Architecture) · Continuous Integration and Continuous Delivery (CI/CD) · Agile Methodologies · Scrum · Design Patterns · SOLID Design Principles · Domain-Driven Design (DDD) · Microsserviços (Microservices) · Spring Framework · Git · Docker · New Relic · Kubernetes · Object-Oriented Programming (OOP)

Fullstack Software Developer / Engineer - Invillia
Sep 2020 - Mar 2021

Consultor to PagSeguro, working in Roma squad with a bureau system and IT customer compliance.

  • Worked in one of the largest digital banks of Brazil creating features to handle people sensitive data according to compliance and LGPD (similar to European GDPR) rules.

  • Made code reviews, tests, pair programming, features, and deployments.

  • Helped to save about 2,5 million of reais using a personalized cache system for bureau paid queries.

Skills: Java · Amazon Web Services (AWS) · Node.js · JavaScript · Fastify · Gradle · Spring Boot · JPA · MongoDB · Apache Kafka · Terraform · REST APIs · Amazon SQS · Amazon Simple Notification Service (SNS) · JUnit · Mockito · Test-Driven Development (TDD) · Testes Unitários e Integrados (Unit Tests and Integration Tests) · Arquitetura Distribuída (Distributed Architecture) · Continuous Integration and Continuous Delivery (CI/CD) · Agile Methodologies · Scrum · Design Patterns · SOLID Design Principles · Microsserviços (Microservices) · Spring Framework · Git · Docker · Jenkins · New Relic · Object-Oriented Programming (OOP)

Fullstack Software Developer / Engineer - Sergipe Parque Tecnológico
Jun 2020 - Sep 2020

Consultor to SES (Sergipe Health State Department) working on SGL, a system to manage hospitals in COVID-19 crisis.

  • Started from scratch a critical project to fight against COVID managing hospitals and providing statuses to ambulances.

  • Worked on code reviews, tests, deployment, and stayed on call on weekends

Skills: Java · Gradle · Spring Boot · JPA · SQL · PostgreSQL · REST APIs · Kanban · SOLID Design Principles · Spring Framework · Git · Object-Oriented Programming (OOP)

Education

2023 - 2027
Bachelor Degree in Information Systems
Universidade Salvador - UNIFACS
GPA: Not Completed Yet
2018 - 2021
Associate of System Development
Instituto Federal de Educação, Ciência e Tecnologia de Sergipe - IFS
GPA: 7.95 out of 10

Awards: 1st Place, I Academic Week of Lagarto Programming Contest

Volunteer Work:

  • In 2018, the rate of dropout students from the IT course at IFS - Campus Aracaju was absurdly high, To help solve this situation I started volunteer classes.

Projects:

  • Fellow Researcher @ CNPQ – Conselho Nacional de Desenvolvimento Científico e Tecnológico working for reduction of costs in the construction of equipment capable of receiving, filtering, reproducing, storing, and cataloging electrocardiogram biosignals.

Projects

Star Wars API Kotlin
Kotlin Spring Webflux Docker MongDB
Star Wars API Kotlin
An abstraction of Star Wars API with a cached strategy to economize requests and improve performance using Kotlin and Spring Webflux.

Achievements

Co-author of Poetry Book Published (ISBN 978-85-9476-144-6)
Publication of a youth literary work in the IV literary anthology of the Cotinguiba Masonic store after being selected among the participants of the literary contest.
Runner-up Place in the State OBI Phase (Brazilian Informatics Olympics)
Second place solving problems using data structure and advanced algorithms.

Get in Touch

My inbox is always open. Whether you have a question or just want to say hi, I’ll try my best to get back to you!