Brendan is available for hire
Hire BrendanBrendan O'Brien
Verified Expert in Engineering
React Developer
Location
Alvor, Portugal
Toptal Member Since
December 28, 2020
Brendan is a software developer with an expert skillet that includes React Native, TypeScript, GraphQL, and Node.js. He's built four minimum viable products (MVPs) using React Native and Node.js for early-stage startups, most recently for Mavely (Mavely.life). Brendan excels at rapid prototyping and is passionate about bringing life to visions and ideas while meeting deadlines.
Portfolio
Mavely
React, React Native for Web, Firebase, Apollo Server, Docker, Google Cloud...
Yotta Workout
React, React Native for Web, Node.js, Firebase, Expo, Redux, React Native
The Bet Excahnge
Node.js, Expo, Redux, React Native
Experience
Availability
Part-time
Preferred Environment
React, Redux, Firebase, Expo, Node.js, GraphQL, React Native for Web, React Native, TypeScript
The most amazing...
...thing I've developed is Mavely, where users can earn cash from home by shopping and selling female-founded and sustainable brands. Check it out at Mavely.life.
Work Experience
React Native/TypeScript Developer
2018 - 2020
Mavely
- Joined as the first engineer to rapidly prototype and get the company going by building an MVP with React Native. This helped transition the company to the current stack as the it grew.
- Incorporated intelligent deep linking among the mobile app, web app, and Shopify to help create a community of over 15,000 entrepreneurial women across the US—earning up to $5,000 in extra cash per year by sharing these links on social media.
- Integrated products, images, and more with GraphQL from over 200 retail partners including Everlane, Brooklinen, Allbirds, Outdoor Voices, Sun Basket, ABLE, and hundreds more within the mobile app to create an ideal social eCommerce experience.
Technologies: React, React Native for Web, Firebase, Apollo Server, Docker, Google Cloud, Prisma, Node.js, GraphQL, React Native, TypeScript
Lead Software Engineer
2018 - 2020
Yotta Workout
- Built out the entire app infrastructure (as a solo developer) with both React Native on the front end and Node.js/Firebase on the back end—bringing 100s of hours of mindfulness content in a streamlined, gamified interface that is both interactive and calming.
- Implemented a premium subscription service to provide dynamic media content within the mobile app, including low-impact cardio, yoga videos, and mental training to paying customers.
- Oversaw the launch process of the iOS and Android app, which can be found at Yottaworkout.com.
Technologies: React, React Native for Web, Node.js, Firebase, Expo, Redux, React Native
Lead Application Developer
2018 - 2020
The Bet Excahnge
- Built the app from scratch using designs from Zeplin and worked closely with the CTO to interface with his Ruby on Rails back end.
- Integrated charts and data visualization using React Native SVG to create a detailed UI to represent betting/sporting data.
- Tested the app with real-time data using WebSockets to help explore the future of fantasy e-sports by allowing users to places dynamic bets on futures within sports, much like traders do on stocks.
Technologies: Node.js, Expo, Redux, React Native
Co-founder | VP of Engineering
2016 - 2018
Brainbuild,, Inc.
- Built the whole product from the ground up using AngularJS and Node.js, eventually migrating to React and React Native. Hired two more full-stack JavaScript developers that I managed by building out weekly sprints while still programming myself.
- Oversaw the entire engineering team as Brainbuild grew to be an Inc. Top 30 Emerging Companies in the US: Inc.com/yeho-lucy-hwang/ss/kairos-top-emerging-us-companies-2017.html.
- Integrated an automated nutrition-and-health scheduling machine learning algorithm within the iOS and Android mobile apps. This algorithm optimizes the timing of meals, snacks, hydration, and sleep events based on a person's unique daily schedule.
Technologies: Amazon Web Services (AWS), AngularJS, MongoDB, Firebase, Node.js, Expo, Redux, React Native
Web Developer
2015 - 2015
CrowdTunes
- Leveraged various front-technologies (HTML, CSS, JavaScript, jQuery) to graph/tabulate company data on an enterprise website.
- Implemented a PHP/Parse.com database (back end) to compile company statistics.
- Utilized these statistics to better understand how to get the perfect music at every location, whether it be a gym, restaurant, or business center—Crowdtunes.com/login.
Technologies: HTML, JavaScript
Experience
Mavely
http://mavely.lifeUsers earn cash by supporting thousands of female-founded, sustainable, and “good for the world” products, curated just for them. It has over 200 retail partners including Everlane, Brooklinen, Allbirds, Outdoor Voices, Sun Basket, True Botanicals, ABLE, and hundreds more.
Skills
Languages
TypeScript, JavaScript, HTML, GraphQL, Java, C, Assembly
Frameworks
React Native, Redux, AngularJS
Libraries/APIs
Node.js, React, React Native for Web
Tools
Expo, Prisma, MATLAB
Platforms
Firebase, Docker, Amazon Web Services (AWS)
Storage
Google Cloud, MongoDB
Other
Apollo Server
Education
2012 - 2016
Bachelor's Degree in Biomedical Engineering/Electrical and Computer Engineering | Minor: Computer Science
Duke University - Durham, NC, United States
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring