Samuel

From Brazil (UTC-3)

Back-end Web Developer|Middle-to-senior

Skills and seniority verified on Apr 4, 2025

Samuel – .NET, .NET Core, C#

Samuel is a competent .NET developer with 6 years of professional experience. He is skilled in API design focused on scalability, performance, and maintainability. He also has experience with front-end technologies like Angular and React. Samuel leverages AI tools daily to optimize code efficiency and streamline development. With a lifelong learning mindset, he constantly enhances his skills.

6 years of commercial experience in

Banking

Credit and lending

E-commerce

Fintech

Food and beverages

Govtech

Healthcare

Healthtech

Human resources

Pet care

Public services

Recruiting

Sales

Smart cities

HRMS

SaaS

Main technologies

.NET

6 years

.NET Core

6 years

PostgreSQL

2 years

Entity

3 years

Additional skills

Angular

AWS

React

GitHub Copilot

Selenium

GitHub Actions

NoSQL

CI/CD

Docker

Jenkins

AWS Lambda

SQL

DynamoDB

Kubernetes

Microservices

API

Kafka

API Gateway

Microsoft Azure

ElasticSearch

Azure Functions

RabbitMQ

MongoDB

Azure DevOps

JavaScript

Direct hire

Possible

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Experience Highlights

Back-end Developer

Apr 2021 - Ongoing4 years 7 months

Project Overview

The payments microservices of the McDonald's global mobile app to manage customer cards, payment methods, and sales transactions with PSPs and integrate with fraud service providers (FSPs).

Responsibilities:

Designed and implemented new payment methods integration;
Created new queues and consumers for SQL data migration in AWS SQS;
Updated a version of payment provider integration;
Worked on troubleshooting and providing hotfixes for production issues;
Developed unit tests with XUnit and end-to-end integration tests using Cypress;
Refactored code for SonarQube compliance;
Provided support for production deployments by monitoring prod transactions, logs, and performance;
Collaborated with cross-functional teams.

Project Tech stack:

.NET

.NET Core

ADO.NET

API

API Gateway

API testing

ASP.NET

ASP.NET CORE

ASP.NET Web API

AWS

AWS Lambda

Agile

Amazon RDS

Amazon SQS

Cassandra

Confluence

Consul

Containers

Cryptography

Cypress

Dependency Injection

Docker

Docker Compose

DynamoDB

ElastiCache

Git

GitHub Actions

GitHub Copilot

Integration testing

JSON

Jenkins

Kubernetes

Kafka

Manual Testing

Microservices

NoSQL

PayPal Api

Postman

REST API

Redis

SOLID

YAML

Visual Studio Code

Vault

Unit testing

Selenium

SonarQube

SQL

SQL Server

Microsoft SQL Server

Swagger

Back-end Developer

Jan 2021 - Ongoing4 years 10 months

Project Overview

It's a SaaS for digital hiring in Brazil that collects employee data and documents via OCR and integrates them with popular payroll systems.

Responsibilities:

Optimized the back end by refactoring code and adding caching to boost response time;
Designed and provided technical analysis for new features implementation;
Incorporated payroll system integrations such as SAP and TOTVS;
Delivered bug fixes and feature enhancements for the Angular front end.

Project Tech stack:

.NET Core

.NET

API

ASP.NET

Angular

Angular JS

Azure DevOps

Azure Functions

Microsoft Azure

CQRS

Dependency Injection

Containers

ElasticSearch

Git

JSON

JSON Schema

Kanban

MongoDB

NoSQL

PostgreSQL

Postman

RabbitMQ

Redis

SPA

SQL

Swagger

TelegramBotAPI

Web Workers

Webhooks

Full-stack Developer

May 2020 - May 20211 year

Project Overview

It's a medical certificate emission system to be used by medical centers across Espírito Santo state in Brazil.

Responsibilities:

Built the back end and front end of the medical certificate system from scratch;
Delivered bug fixes for a legacy system built with WebForms and jQuery;
Created unit tests to ensure code reliability;
Handled project deployment using Microsoft Azure.

Project Tech stack:

.NET Core

Angular

PostgreSQL

REST API

JavaScript

Trello

Azure DevOps

ASP.NET

Back-end Developer

Mar 2020 - Jan 202110 months

Project Overview

It's the company responsible for developing and maintaining city hall's public systems. The projects included user authentication and pet adoption systems.

Responsibilities:

Added new features to the authentication system used by all city hall services;
Delivered bug fixes and new features for a public pet adoption system;
Set up a data replication system between databases using RabbitMQ queues.

Project Tech stack:

.NET

.NET Core

jQuery

Microsoft SQL Server

PostgreSQL

Redmine

Jenkins

Redis

SQL

JavaScript

CSS

RabbitMQ

Entity

Full-stack Developer

Jun 2019 - Mar 20209 months

Project Overview

It's a Brazilian bank offering financial solutions for customers and local companies in Paraná and Rio Grande do Sul states.

Responsibilities:

Improved an ASP.NET application for managing customer credit cards with bug fixes and new features;
Contributed to migrating a legacy application to .NET Core;
Built a full-stack project from scratch with React and .NET Core;
Integrated Google Maps API and PostgreSQL geolocation queries to find nearby stores for customers;
Created unit tests using XUnit and NUnit frameworks.

Project Tech stack:

.NET

.NET Core

PostgreSQL

REST API

jQuery

CSS

JavaScript

Kibana

ASP.NET MVC

MVC

React

Google Maps API

NUnit

Keep in mind, the experience summary might exclude non-relevant projects

Languages

English

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