joaomarcuslf/leet-discuss
Archive LeetCode Challenges
Hi, I'm João Marcus Fernandes
Staff Software Engineer | Back-end Specialist
Tech Lead | Cloud Computing | Go / Golang | Node.js | MongoDB
I’m a seasoned software engineer with over 9 years of experience building scalable, efficient, and innovative solutions. I’ve worked with companies across Brazil, North America (USA and Canada), Europe, and Asia, focusing on Back-end Engineering, Software Architecture, and Tech Leadership.
My expertise includes Go (Golang), Node.js, Cloud Computing (AWS, GCP), DevOps (CI/CD, Docker, Kubernetes), and Agile methodologies (XP, Scrum). I’m passionate about functional programming, TDD, and implementing architectures like Clean Architecture, Distributed Systems, and Event-Driven Design.
For a deeper dive into my experience, check out my Description Breakdown.
Work Experience
June 2014
Present
Description Breakdown
I’m a seasoned software engineer with over 9 years of experience building scalable, efficient, and innovative solutions. Since 2014, I’ve had the privilege of working with companies across Brazil, North America (USA and Canada), Europe, and Asia, gaining a global perspective on software development.
I hold a degree in System Analysis and Development and have focused my career on Back-end Engineering, Software Architecture, and Tech Leadership. I’ve also worked extensively as a Full-stack and Front-end Developer, giving me a well-rounded understanding of the entire software development lifecycle.
My technical expertise includes Node.js (JavaScript/TypeScript), Go (Golang), Python, Ruby (Ruby on Rails, Sinatra), and MongoDB, with a strong focus on Cloud Computing using AWS and GCP. I’ve also worked extensively with DevOps practices, including CI/CD pipelines, containerization with Docker, and orchestration with Kubernetes, ensuring scalable and reliable deployments.
As a Tech Lead, I’ve guided teams through complex projects, from initial architecture design to deployment, fostering collaboration and innovation. I’m experienced in Agile methodologies, particularly XP and Scrum, and I apply Test-Driven Development (TDD) to ensure efficiency and confidence in code changes. I’ve also implemented various software architectures, including Clean Architecture, Distributed Systems, Event-Driven Architecture, and Hexagonal Architecture, tailoring solutions to meet specific project needs.
I’m passionate about building systems that are simple, efficient, and scalable, principles that align closely with my advocacy for functional programming.
Following is a overview of my skills, you can filter by Hard Skill, Soft Skills, and others.
Projects
joaomarcuslf/gardevoir-ex-damage-calculator
Automatic Damage Calculator
joaomarcuslf/gas_sensor_iot
Gas Sensor IoT
joaomarcuslf/pico_reaction_game
Pico Reaction Game
joaomarcuslf/code-challenges
Code Challenges
joaomarcuslf/sucellus
Docker Cloud Provider
joaomarcuslf/color-generator
Color Generator API
joaomarcuslf/qr-generator
QR Generator API
joaomarcuslf/keyforge-name-of-the-day
This is my take on Twitter bot with Go.
joaomarcuslf/ticket-creator
This is a service that creates Tickets to be shared for others.
joaomarcuslf/workspace-configs
My default settings for most of my projects
arctouch/web-tests-factory
Tests Factory for most of the Web Frameworks
joaomarcuslf/go-go-url-go
This is and URL shortener repo written in Go, using Redis and Docker.
joaomarcuslf/grpc-golang-example
POC using gRPC to learn
joaomarcuslf/docker-golang-api-template
POC using gRPC to learn
joaomarcuslf/auth-blog-service
RestAPI, using JWT and Auth by Role
joaomarcuslf/mentorship
This project contains the codes used for the mentorship I'm giving
joaomarcuslf/textual-emotion-detect
POC of how to detect text emotions.
joaomarcuslf/python-advanced-studies
An repository for my studies in Python.
joaomarcuslf/react-graphql-country-list
An application built with React, and Redux. Consuming GraphQL Api.
joaomarcuslf/react-flask-application
An application built with React, Flask, Postgres and Docker.
joaomarcuslf/web-gongyo
A place to pray.
joaomarcuslf/mtg-csv-generator
This repo will show some of my data-science studies using MTG cardbase
joaomarcuslf/data-science-studies
Repo to show how my studies about data science are going
joaomarcuslf/sabaki-i18n
My contributions to Sabaki i18n
joaomarcuslf/react-express-ssr
SSR example using React and ExpressJS
joaomarcuslf/golang-studies
Repo to show how my studies about Golang are going
joaomarcuslf/react-goban
Migrated Goban component to modern React
joaomarcuslf/pbl-tcc-bucket
This is the AWS Bucket API for the PBL project
joaomarcuslf/pbl-tcc-front
This is the Front-end built in VueJS for the PBL project
joaomarcuslf/pbl-tcc-api
This is the Rest Api Back-end built in Ruby on Rails and PostgreSQL for the PBL project
joaomarcuslf/cross-event
Module for Event communication for React Native, Node and Browser
joaomarcuslf/rasp-monitor-bot
Clojure Bot for Raspberry Pi
joaomarcuslf/authorization-api
JWT Api Authorization built in several languages
joaomarcuslf/clojure-catalog-service
Example of a catalog api built in Clojure
joaomarcuslf/clojure-rest-api
Clojure REST API
Ice Breaker Topics
Baduk
Coffee
Bass Guitar
Fountain Pens
Languages
Pets
Reading
Tcg
Video Games