Jefferson Moura Amador de Oliveira, Developer in Barnstable, MA, United States
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Jefferson Moura Amador de Oliveira

Verified Expert  in Engineering

Bio

Jefferson is a senior React developer with around six years of experience building amazing web apps for clients like iRobot, Ford, and Tremendous. He focuses on data performance and user experience, including accessibility and A/B testing, and he also has a good background in user tracking and behavior analysis. Jefferson values transparency, commitment, communication, and attention to detail.

Portfolio

Sage Intacct
React, Node.js, PostgreSQL, Swift, JavaScript, React Native, TypeScript...
Genome
React Native, React, Firebase, Unity3D, TypeScript, Next.js, GraphQL...
Tremendous, Inc
Ruby on Rails (RoR), JavaScript, React, Chrome API, Next.js, TypeScript

Experience

  • JavaScript - 10 years
  • React - 8 years
  • Node.js - 6 years
  • TypeScript - 6 years
  • AngularJS - 5 years
  • React Native - 5 years
  • Next.js - 5 years
  • Ruby on Rails (RoR) - 1 year

Availability

Part-time

Preferred Environment

MacOS, Slack, GitHub, Visual Studio Code (VS Code)

The most amazing...

...thing I worked on was Conta.no, an app that serves 2% of Norwegian people and delivers millions of quotes and invoices every day.

Work Experience

Senior Software Engineer

2021 - PRESENT
Sage Intacct
  • Idealized and implemented features for the embedded experience and refactored the Approvals page, delivering a better experience for the final client.
  • Implemented the core features of the Time Assistant desktop on macOS.
  • Helped stabilize the web client codebase to help develop new features and decrease maintenance efforts.
Technologies: React, Node.js, PostgreSQL, Swift, JavaScript, React Native, TypeScript, Flutter, Intacct, Sage Intacct

Front-end Engineer

2020 - 2021
Genome
  • Developed the CMS for the iRobot Kiosk app that you can find on BestBuy around the US.
  • Worked on the development of a prayer app that uses engagement through sharing encouragement, praying with and for others, and allowing space in your day to meditate.
  • Developed and worked on Holr, an app that allows influencers to share their content into a paid subscription format and grow their fanbase with exclusive content.
Technologies: React Native, React, Firebase, Unity3D, TypeScript, Next.js, GraphQL, Firebase Web SDK, Firebase Cloud Functions, Algolia, JavaScript

Full-stack Engineer

2020 - 2021
Tremendous, Inc
  • Implemented two new methods to redeem the rewards; one in partnership with Coinbase the clients can get cryptocurrency, and Public where the rewards can be redeemed as stocks.
  • Developed the reward recommendation redemption that highlights the best reward for users. This was foreshadowed to increase the revenue by 2.4% in the next year and the adoption rate was 34%.
  • Created a Chrome extension that allows the clients to use their rewards without leaving the website they’re currently using.
Technologies: Ruby on Rails (RoR), JavaScript, React, Chrome API, Next.js, TypeScript

Front-end Engineer

2016 - 2020
Conta AS
  • Worked on the Salg project, a quote generator that handles all of the processes from estimate to sale. The project increased the revenue by 23% and was the third most used module of the app.
  • Created A/B case tests, and was responsible for introducing and developing a big part of the accessibility code. I also implemented all animations and user interactions.
  • Implemented part of the bookkeeping module, which is the most important module of the app, and is being used by 2% of the Norwegian population.
Technologies: AngularJS, Elm, JavaScript, React

Co-founder | Full-stack Developer

2015 - 2016
Aurum Sistemas
  • Developed part of an app for a startup that made success in Kickstarter and TechCrunch in 2014; this was the controller for a boosted board, with GPS built-in.
  • Planned and developed a web app to manage a white label soccer team fan club, that was later sold for three teams of regional league in Brazil.
  • Developed the logic for an indoor tracking system to be used in a shopping center, that could give users coupons for stores they were passing by and also provide them important information about the mall.
Technologies: Node.js, React, JavaScript, Python, Django

Web Developer

2014 - 2015
Varlik Soluções
  • Created websites for dealers in the northeast and north of Brazil.
  • Developed an internal tool to accelerate the website production that increased by 33% the development speed.
  • Fixed bugs using user-tracked data, and also increased UI performance from those reports.
Technologies: WordPress, AngularJS, JavaScript, React

2GTHR App

https://play.google.com/store/apps/details?id=com.seedpray
2GTHR is a well-being app that uses engagement through sharing encouragement, praying with and for others, allowing space in your day to meditate. 2GTHR connects individuals in a meaningful relationship they can have with each other, with yourself, and with God.

Tremendous Wallet

A digital wallet to access rewards you redeemed from Tremendous.com; also fills out checkout pages with card information, gift cards codes, and coupons from your rewards without exiting the current website.

Holr App

It was a subscribe-to-follow social network that enables content creators to post exclusive content to their fanbase and generate income from those followers and generate more engagement through special events participation and perks.
DECEMBER 2020 - PRESENT

Software Development

U.S. Equivalence of Formal Education (USCES)

Libraries/APIs

React, Node.js, Chrome API, Firebase Web SDK

Tools

Intacct, Slack, GitHub

Languages

JavaScript, HTML5, TypeScript, Swift, Elm, Python, GraphQL

Frameworks

Next.js, React Native, AngularJS, Ruby on Rails (RoR), Unity3D, Django, Flutter

Platforms

Firebase, Sage Intacct, Visual Studio Code (VS Code), WordPress, MacOS, Algolia

Storage

PostgreSQL

Other

Firebase Cloud Functions

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