George Ferreira
Verified Expert in Engineering
Full-stack Developer
Fortaleza, Brazil
Toptal member since April 7, 2021
George is a full-stack developer and problem solver—be they technical or not—with over a decade of experience developing a range of projects involving databases (Oracle PL/SQL), various programming languages (JavaScript, Java), frameworks (Express.js), and libraries (Node.js). On any project issue, he strives to understand the causes and then create accurate, durable, and elegant solutions. George prefers to work on back-end software projects, developing APIs to solve challenging issues.
Portfolio
Experience
- MySQL - 5 years
- JavaScript - 5 years
- Node.js - 4 years
- TypeScript - 2 years
- PostgreSQL - 2 years
- REST - 2 years
- Express.js - 2 years
- NestJS - 1 year
Preferred Environment
Node.js, JavaScript, TypeScript, Web Development, Relational Databases, Full-stack, Front-end, PHP, DB
The most amazing...
...thing was building a real-time indexing/searching engine running across Oracle databases (millions of attributes). It finds any customer in under one second.
Work Experience
Senior Full-stack Developer
Monument Software, Inc.
- Developed rich web applications using React, MUI, and top industry libraries such as React Query, React Hook Form, Zod, and others.
- Built a powerful REST API using TypeScript and top industry frameworks and libraries, such as Nest.js, TypeORM, and Nx.
- Guaranteed software quality by performing code reviews, pair programming, helping design test cases, and producing unit test coverage for both the back end and front end using Jest and the React Testing Library.
- Joined grooming sessions to discuss business requirements and produced task descriptions as a point of start to implementation.
Integrations Specialist
Rare Circles Inc.
- Created a Shopify app to integrate the company's proprietary platform into Shopify.
- Designed the architecture for data exchange between the company's platform and Shopify.
- Implemented an easy way to connect users and the platform.
Low-code Developer (via Toptal)
Traffic Trends Inc.
- Integrated the Shopify store with a custom app built on the Retool low-code tool.
- Created a MongoDB database and schema for data storage.
- Advised on best practices, tools, and technologies to improve software development.
Senior Software Engineer
Z-Tech
- Developed software that processes financial events and turns them into desired accounting postings. The app produces data useful for financial reconciliation.
- Built the application in a way that could be configured as necessary to adapt to any chart of accounts and any finance application of internal and external players.
- Designed an interface to allow data ingestion from several distinct formats into the application in a way that could be configured as necessary to adapt to any data source.
Senior Systems Analyst
Grupo Portfolio
- Designed the software architecture, REST APIs, database modeling, and Salesforce data modeling to integrate the company’s on-premises ERP software and Salesforce cloud.
- Integrated crucial business processes and Salesforce.
- Designed the software architecture, REST APIs, and Salesforce Marketing Cloud data modeling (data extensions) for the integration between the company’s on-premise ERP software and Salesforce Marketing Cloud.
- Built journeys, automation, landing pages, emails and SMS sending, and data updating at Salesforce Marketing Cloud.
- Automated customer data confirmation and marketing campaigns for thousands of customers.
- Designed the software architecture; also built and tested the application for search and indexing in real-time of customer information. This app can find any customer when it's informed of any of several related data points for lookup.
- Found, cleaned, and corrected customer data, saving taxes due to government regulations.
- Performed data analysis and correction—evolving and updating customer addresses targeting equalization to the Brazilian Postal Services database.
Requirements Engineer
Indra
- Built an account management platform for a large bank.
- Specified requirements and conducted surveys with the end user.
- Improved the quality of deliveries, accounted for by customer acceptance, from 10% to 90%.
Systems Analyst
VTI Tecnologia da Informação
- Created a plugin for the Eclipse IDE that helps maintain traceability between the source code and use cases.
- Developed an electronic document management system resulting in the management of thousands of digitalized documents.
- Implemented methodologies for MPS.BR and CMMI 2 certifications.
Experience
Indexing and Searching Engine
Customer Data Gathering Software
Salesforce Marketing Cloud Implementation
Salesforce Implementation
Education
Bachelor's Degree in Computer Science
Universidade Estadual do Ceará - Fortaleza, Ceará, Brazil
Certifications
AWS Certified Developer – Associate
Amazon Web Services Training and Certification
Certificate of Completion MongoDB Course
Udemy
EF SET English Certificate 94/100 (C2 Proficient)
EF Standard English Test (EF SET)
Oracle Autonomous Database Cloud 2019 Certified Specialist
Oracle
Oracle Cloud Infrastructure 2019 Certified Architect Associate
Oracle
Oracle Cloud Infrastructure Foundations 2020 Certified Associate
Oracle
Oracle Certified Associate, Java SE 7 Programmer
Oracle
Skills
Libraries/APIs
Node.js, REST APIs, React, jQuery, OpenAPI, Shopify API
Tools
Retool, Git, IBM Rational, Salesforce Sales Cloud, Oracle Application Express (APEX), Salesforce Marketing Cloud, GitHub
Languages
JavaScript, SQL, TypeScript, Java 7, PHP 5, HTML, UML, AMPscript, Java 6, CSS, XML, PHP, GraphQL, Python, Go
Frameworks
Express.js, Rational Unified Process (RUP), Jest, Koa, NestJS, Material UI
Paradigms
Object-oriented Programming (OOP), Server-side Programming, REST, Refactoring, Clean Architecture, Clean Code, Unit Testing, Low-code Development, Microservices
Platforms
Oracle Database, Web, Pentaho, Apache Kafka, Azure, Linux, Shopify, Google Cloud Platform (GCP), Docker, Amazon Web Services (AWS)
Storage
Oracle PL/SQL, Relational Databases, JSON, DB, Databases, Oracle SQL, PostgreSQL, MySQL, MongoDB
Industry Expertise
Marketing
Other
Web Development, APIs, Back-end, Legacy Code, Legacy Software, CSV Import, CSV Export, CSV, Algorithms, Customer Journey, API Integration, Software Design, Integration, Data Structures, Server-side JavaScript, Email, Marketing Cloud, TCP/IP, HTTP, Landing Pages, GTL, Architecture, Networking, Scripting, CSS Selectors, Low Code, Full-stack, Front-end, Cloud, RESTful Microservices, Technical Writing, Technical Documentation, Writing & Editing, Webhooks, Mathematics, ESLint, Full-stack Development, TypeORM
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