Levy Moreira, Developer in Dublin, Ireland
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Levy Moreira

Verified Expert  in Engineering

Software Developer

Dublin, Ireland
Toptal Member Since
June 1, 2020

In the last several years, Levy has been working as a consultant working with large companies like LG and Mastercard. He is specialized in JavaScript development but also works as a full-stack developer due to his broad knowledge in the front end, back end, and infrastructure. Levy is always ready to learn and put his knowledge in practice.


Azure, .NET, React, JavaScript, TypeScript, SQL, Chatbots, ChatGPT
SoMee Social
Amazon Web Services (AWS), Blockchain, Ethereum, Node.js, Angular, React...
Java, Angular, JavaScript, Spring, Hibernate, Spring Boot, SQL




Preferred Environment

Telegram Messenger API, Skype, Slack, Zoom, Linux, Windows, Teams, Insurance APIs, Finance, Blockchain

The most amazing...

...system I've developed was a highly customizable metadata-driven insurance application that became the main product of a multinational company.

Work Experience

Software Engineer

2020 - PRESENT
  • Released to production a portal used by Office Enterprise admins.
  • Improved the code refactoring the existing TypeScript/React portal code to be extensible and easier to test.
  • Added monitoring to understand application usage across different tenants.
Technologies: Azure, .NET, React, JavaScript, TypeScript, SQL, Chatbots, ChatGPT

Software Engineer Consultant

2019 - 2020
SoMee Social
  • Reduced Docker image sizes using Docker multi-stage builds.
  • Fixed cyclical object serialization improving response times from seconds to milliseconds.
  • Implemented solutions to prevent fake users from exploiting APIs.
Technologies: Amazon Web Services (AWS), Blockchain, Ethereum, Node.js, Angular, React, Kubernetes, SQL

Senior Software Engineer

2019 - 2019
  • Worked on payment gateway integrations on multiple products like Shopify, Joomla, and Prestashop.
  • Created unit and integration tests that cover as many edge cases as possible.
  • Worked on 3DSecure (payment multi authentication service) SDKs.
Technologies: Java, Angular, JavaScript, Spring, Hibernate, Spring Boot, SQL

Senior Software Engineer - Team Leader

2017 - 2019
Guidewire Software
  • Worked from conception to production deployment of the first SAS solution developed by Guidewire.
  • Developed production-ready software using cloud-native solutions like AWS Lambadas and DynamoDB.
  • Created and maintained deployment pipelines with rollback capacity.
Technologies: Amazon Web Services (AWS), Node.js, React, SQL

Software Engineer

2014 - 2016
Atlantic Institute
  • Implemented a web editor with mobile and cross-browser support.
  • Worked with the creation and monitoring of complex systems.
  • Developed an online network diagram designer where users could configure complex networks using a drag and drop solution created with SVG and pure JavaScript.
Technologies: JavaScript, Angular, Spring, Hibernate, Spring Boot, SQL

Senior Software Developer

2013 - 2014
ISGH (Health Institute and Hospital Management)
  • Created an Applet solution to support digital signature with physical USB devices.
  • Integrated multiple labs and hospital systems to aggregate their data and generate reports.
  • Created online timesheet control using fingerprint readers.
Technologies: JSF, JavaScript, Java, Spring, Hibernate, Spring Boot, SQL

Trainee/Junior Software Developer

2009 - 2013
Sistech Computing
  • Created dynamic reports where users could add and remove fields to adapt the report to their necessities.
  • Completed the validation of our application with the revenue to get a stamp and be able to sell the application to merchants.
  • Developed automated annual balance reports that were sent by our customers.
Technologies: Java, Delphi, SQL

DSB - Digital Small Business

A SAS application created using cloud-native solutions like AWS Lambda and DynamoDB, we not just migrated the software to the cloud but we have made it metadata-driven and highly customizable. I worked as a team leader, having crucial participation in each decision during the development, deployment, and monitoring.

SoMee Social

This is a social media application based on blockchain. I was working as a full-stack consultant and did multiple improvements in the platform: improving the website experience, removing multiple Angular observables attached to unmounted components, and improving the JSON serialization performance.
2010 - 2012

Bachelor's Degree in Analysis and System Development

Leão Sampaio University, Brazil - Brazil


React, Node.js, Telegram Messenger API


Git, GitHub, Webpack, ChatGPT, Zoom, Slack, Skype


Spring Boot, Angular, Express.js, Jest, Redux, Spring, Hibernate, JSF, .NET


JavaScript, Java, CSS, SQL, TypeScript, Delphi




MySQL, PostgreSQL


Amazon Web Services (AWS), Linux, Ethereum, Blockchain, Azure, Windows, Kubernetes


Software Development, Chatbots, Teams, Insurance APIs, Finance

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