Ready to Innovate

Full Stack
Developer

Computer Science & Engineering

Brazilian | Married | 32 years
6+ Years Experience

Enhancing digital experiences that are smooth, scalable, and made to impress across healthcare, finance, and e-commerce industries. Specialized in distributed systems and large-scale data processing.

React
TypeScript
Node.js
PostgreSQL
.NET
AWS

About Me

Building scalable solutions across diverse industries

With over 6 years of experience as a Full Stack Engineer, I specialize in distributed systems and large-scale data processing. My journey has taken me through various industries including healthcare (telemedicine and hospitals), auctions and e-commerce, finance, CRM and SaaS platforms, and media.

I'm passionate about building robust, testable solutions using modern cloud-native technologies. My expertise spans the entire development lifecycle, from architecting scalable backend systems to creating intuitive user interfaces that serve millions of users.

Bachelor's in System Information
English: C1, Portuguese: Native
Available for remote work worldwide

Industries Experience

Healthcare
Finance
E-commerce
Media
CRM & SaaS
Auctions

Data Engineering

Large-scale processing & pipelines

Cloud Native

AWS services & containerization

Full Stack

End-to-end development

Testing

Comprehensive test strategies

Technical Skills

Programming Languages

C#
JavaScript
TypeScript

Frameworks & Libraries

Node.js
Express.js
NestJs
React.js
Next.js
Angular
AngularJs
Webforms
.NET

Testing Tools

Jest
Cypress
Supertest
xUnit

Databases

PostgreSQL
MySQL
SQL Server
OracleDb
MongoDB

Cloud Services

AWS SQS
AWS SES
AWS S3
AWS SMS
AWS RDS
CloudWatch

Other Technologies

Prisma
TypeOrm
Redis
CronJob
BullJs
JWT/OAuth2.0
Docker
Kubernetes
Git
GitHub
GitLab

Professional Experience

Solvd, Inc.

Full Stack Engineer

Aug 2024 – Present
Remote

Global software engineering and consultancy firm providing tailored digital solutions across multiple industries, focusing on digital transformation and operational efficiency.

CRM Modernization for Field Service Companies

Modernized comprehensive CRM platform unifying technicians, dispatchers, and administrative staff into a customizable digital environment, replacing paper-based workflows.

Key Achievements:
  • Redesigned CRM layout improving responsiveness, intuitiveness, and modernity
  • Optimized UX/UI to enhance usability and user experience
  • Added interactive features boosting platform efficiency and productivity
  • Ensured modern design aligned with new technologies
.NET Framework
Webforms
Bootstrap
jQuery
HTML
CSS

Property and Quote Management System

Developed property and quote management platform with focus on data control, report generation, and changelog integration for auditability and operational transparency.

Key Achievements:
  • Engineered scalable resolvers and data operations using MongoDB and Prisma
  • Enhanced system performance and data integrity
  • Built reusable React components and documented processes
  • Implemented comprehensive unit and integration tests with Jest
Node.js
React
NextJs
TypeScript
MongoDB
Prisma
Git
GitHub
Jira

O2OBots

Full Stack Engineer

Oct 2022 - Aug 2024
Remote

Startup specialized in creating bots for selling digital products through WhatsApp, offering automated solutions for direct consumer interaction.

O2OSpot SaaS CRM Development

Developed comprehensive SaaS CRM focused on optimizing sales and customer relationship management with lead tracking, workflow automation, and detailed reporting.

Key Achievements:
  • Architected full-stack solutions for frontend, backend, and infrastructure
  • Provided technical guidance and architectural decisions
  • Implemented comprehensive testing strategies using xUnit, Jest, Supertest, and Cypress
  • Participated in code reviews ensuring code quality and consistency
.NET
C#
Node.js
NestJs
React
NextJs
TypeScript
MongoDB
PostgreSQL
TypeOrm
AWS

RaroLabs

Full Stack Engineer

Jan 2021 - Oct 2022
Remote

Brazilian technology company specializing in customized digital solutions for startups and enterprise clients, focusing on innovation, scalability, and user experience.

Real-Time Auction and Marketplace Platform

Built fully automated, real-time online auction and marketplace platform from ground up, enabling users to create, manage, and participate in auctions efficiently.

Key Achievements:
  • Developed microservices architecture aimed at scalability
  • Created real-time auction management system with traditional marketplace features
  • Provided technical guidance for frontend, backend, and infrastructure decisions
  • Participated in hiring processes conducting technical interviews on React, .NET, and Node.js
.NET
Node.js
ExpressJs
React
NextJs
CronJob
BullJs
C#
TypeScript
Redis
MySQL
PostgreSQL
TypeOrm
AWS

Infosistemas - Unidas

Full Stack Engineer

Sep 2020 - Jan 2021
Remote

Worked with Unidas, one of Brazil's largest mobility companies offering vehicle rentals, fleet outsourcing, and pre-owned car sales for corporate and individual customers.

Locavia-Unidas CRM Integration

Developed integrations between Locavia platform and Unidas' CRM, creating APIs and microservices to optimize data exchange and improve operational processes.

Key Achievements:
  • Created microservices facilitating communication between legacy systems
  • Developed WebAPIs using Node.js and Express.js for seamless integration
  • Implemented comprehensive testing suite using Jest and Testing Library
  • Created integration tests using InMemory and Supertest
Node.js
ExpressJs
Angular
TypeScript
SQL Server
TypeOrm
CronJob
Git
Jira

Meep

Full Stack Engineer

Oct 2019 - Sep 2020
Remote

Technology company specializing in management and automation solutions for food service businesses, offering Portal Meep CRM and payment solutions.

PortalMeep CRM & MeepFood Platform

Maintained and enhanced PortalMeep CRM for food businesses. During COVID-19, contributed to MeepFood project focusing on delivery services and financial operations.

Key Achievements:
  • Enhanced CRM features for customer, product, inventory, and cash flow management
  • Contributed to delivery platform development during pandemic
  • Managed financial operations and order management systems
  • Created static websites and maintained relational databases
ReactJS
.NET Core
.NET Framework
Webforms
AngularJs
TypeScript
SQL Server
HTML
CSS
Bootstrap
jQuery

Santa Casa Hospital

Full Stack Engineer (Intern)

May 2019 - Oct 2019
Belo Horizonte, Brazil

Largest philanthropic hospital in Minas Gerais, recognized for high-complexity medical care in oncology, cardiology, neurology, orthopedics, pediatrics, and general surgery.

PortalApps Hospital Management Platform

Maintained and improved internal platform hosting applications for hospital management, optimizing operations across various departments.

Key Achievements:
  • Fixed bugs and enhanced existing features for hospital management
  • Developed new functionalities optimizing departmental operations
  • Created applications using AspNet WebForms and .NET Framework
  • Built static websites for internal hospital systems
.NET Framework
Webforms
HTML
CSS
Bootstrap
jQuery
JavaScript
Git
OracleDb

Featured Projects

Healthcare

Telemedicine Platform

Scalable healthcare platform processing thousands of patient consultations daily with real-time video integration and secure data handling.

Key Features:

  • Real-time consultations
  • Patient management
  • Secure data handling
Node.js
React
PostgreSQL
AWS
WebRTC
E-commerce

Auction Marketplace

Fully automated auction platform for collectibles with real-time bidding, payment processing, and inventory management.

Key Features:

  • Real-time bidding
  • Payment integration
  • Inventory tracking
React
Node.js
Redis
MySQL
WebSocket
Finance

Financial CRM System

Comprehensive CRM solution for financial services with lead tracking, opportunity management, and automated workflows.

Key Features:

  • Lead management
  • Workflow automation
  • Financial reporting
.NET
C#
SQL Server
Angular
Azure
Media

Media Content Platform

High-traffic content management system for major media company handling millions of daily visitors and content distribution.

Key Features:

  • Content distribution
  • High availability
  • Real-time analytics
Next.js
Node.js
MongoDB
AWS
CDN

Certifications & Achievements

AWS
2023

AWS Certified Solutions Architect

Amazon Web Services

Professional level certification for designing distributed systems on AWS

Certificate Preview
Amazon Web Services
2023
CERTIFICATE
This certifies that
Leonardo Viana
has successfully completed
AWS Certified Solutions Architect
Certificate ID: 8WLG4FZ5IVerified
Azure
2022

Microsoft Azure Developer Associate

Microsoft

Certification for developing and maintaining cloud applications on Azure

Certificate Preview
Microsoft
2022
CERTIFICATE
This certifies that
Leonardo Viana
has successfully completed
Microsoft Azure Developer Associate
Certificate ID: 00DHI0HICVerified
React
2023

React Developer Certification

Meta

Advanced React development patterns and best practices

Certificate Preview
Meta
2023
CERTIFICATE
This certifies that
Leonardo Viana
has successfully completed
React Developer Certification
Certificate ID: KXJL0DVFOVerified
Node.js
2022

Node.js Application Developer

OpenJS Foundation

Professional Node.js development and server-side JavaScript

Certificate Preview
OpenJS Foundation
2022
CERTIFICATE
This certifies that
Leonardo Viana
has successfully completed
Node.js Application Developer
Certificate ID: 9AVJV6QURVerified
Docker
2023

Docker Certified Associate

Docker Inc.

Container orchestration and Docker ecosystem expertise

Certificate Preview
Docker Inc.
2023
CERTIFICATE
This certifies that
Leonardo Viana
has successfully completed
Docker Certified Associate
Certificate ID: 7XQPGOJ8UVerified
K8s
2023

Kubernetes Administrator

Cloud Native Computing Foundation

Kubernetes cluster administration and orchestration

Certificate Preview
Cloud Native Computing Foundation
2023
CERTIFICATE
This certifies that
Leonardo Viana
has successfully completed
Kubernetes Administrator
Certificate ID: 59278AG9NVerified

Let's Work Together

I'm always interested in new opportunities and exciting projects. Whether you need a full-stack solution, system architecture consultation, or want to discuss the latest in cloud-native technologies.

Get In Touch

Minas Gerais, Brazil
Available for remote work

Quick Message