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Rafael Dalprá
Verified Expert in Engineering
Software Developer
Blumenau - State of Santa Catarina, Brazil
Toptal member since August 29, 2014
Bio
Rafael is an entrepreneur and developer with extensive experience in Web2 technologies, working full-stack. He's passionate about blockchain and crypto technologies and their potential impact. Rafael is highly motivated, creative, and efficient, with an eye for user experience.
Portfolio
Aurora Labs
APIs, TypeScript, React, Next.js, Jest, Redux, Webpack, User Experience (UX)...
Moonsama
NestJS, React, TypeScript, CSS, JavaScript, Amazon Web Services (AWS), Web3.js...
Grid Singularity
JavaScript, TypeScript, HTML, Scrum, React, Agile Software Development...
Experience
- Full-stack - 14 years
- PostgreSQL - 10 years
- Amazon Web Services (AWS) - 9 years
- Node.js - 5 years
- React - 5 years
- TypeScript - 4 years
- Solidity - 2 years
- Web3.js - 2 years
Work Experience
Full-stack Developer
2024 - 2025
Aurora Labs
- Worked on several different products as a software engineer, including AuroraCloud.dev, Aurora.plus, calyx.xyz, near-intents.org, and more.
- focused on front-end development of DApps and hybrid applications (Web2+Web3).
- Contributed to internal libraries, engineering decisions, and design implementation.
- Worked extensively with the integration of smart contracts, indexers, RPCs, and wallets.
- Built the upcoming tesseras.xyz RWA Dex application, leveraging Calyx's Web3, intents-powered Swap Widget.
Technologies: APIs, TypeScript, React, Next.js, Jest, Redux, Webpack, User Experience (UX), User Interface (UI), API Development, Artificial Intelligence (AI), Supabase
Senior Full-stack Developer
2022 - 2025
Moonsama
- Started a new project called the Moonsama Gaming platform, where Web2 games are integrated into Web3-based competitions at play.moonsama.com.
- Worked daily with blockchain tech surrounding the apps.
- Contributed to the project in a full-stack capacity, leveling up my NestJS back-end game and following responsive pixel designs.
- Took responsibility for the entire product lifecycle.
Technologies: NestJS, React, TypeScript, CSS, JavaScript, Amazon Web Services (AWS), Web3.js, Solidity, CSS3, GraphQL Code Generator, PostgreSQL, HTML5, Next.js, GraphQL, Figma, Full-stack, APIs, Node.js, WebStorm, Entrepreneurship, Chakra UI, Ethereum, Blockchain, Crypto, UI Components, Design Systems, Storybook, Microservices, Docker, Architecture, XML, Web3, Responsiveness, API Integration, Front-end Development, UI Design, DevOps, DApps, MetaMask, Ethers.js, React Query, Tailwind CSS, JSON, OAuth, RESTFul APIs, OAuth 2, Payment Gateways, AI Tools, Full-stack Development, SQL, Tailwind UI, Redux, Webpack, User Experience (UX), User Interface (UI), API Development, Artificial Intelligence (AI)
Front-end Team Lead
2020 - 2022
Grid Singularity
- Built the internal front-end team from scratch from a third-party setup with a software house.
- Worked on recruiting, reviewing, and onboarding new team members.
- Established a custom Scrum methodology for the company structure.
- Oversaw inter-team communications with design, back-end, and business teams.
- Led a mixed team to build a new version of the software in a short window of time.
Technologies: JavaScript, TypeScript, HTML, Scrum, React, Agile Software Development, Front-end, Web3.js, Solidity, CSS, Amazon Web Services (AWS), CSS3, GraphQL Code Generator, PostgreSQL, HTML5, Next.js, NestJS, GraphQL, Figma, APIs, Node.js, WebStorm, Chakra UI, Ethereum, Blockchain, Crypto, UI Components, Design Systems, Material UI, Storybook, Microservices, Docker, Architecture, XML, Electron, Web3, Responsiveness, API Integration, Front-end Development, UI Design, DevOps, DApps, MetaMask, Ethers.js, React Query, JSON, RESTFul APIs, OAuth 2, SQL, Redux, Webpack, User Experience (UX), User Interface (UI)
Senior Full-stack Developer
2019 - 2020
Simplivest
- Handled the architecture planning and execution for the entire infrastructure, from design to production.
- Worked on the API and research and development for the cache layer.
- Contributed to the entire development of the front-end application from design to production.
Technologies: PostgreSQL, Amazon Web Services (AWS), Ruby on Rails (RoR), React, HTML, Bootstrap, Scrum, JavaScript, Ruby, Agile Software Development, Front-end, React Native, CSS, CSS3, HTML5, GraphQL, Figma, Full-stack, APIs, Node.js, WebStorm, UI Components, Design Systems, Storybook, Microservices, Docker, Architecture, XML, Responsiveness, API Integration, Front-end Development, UI Design, DevOps, React Query, JSON, OAuth, RESTFul APIs, Payment Gateways, Full-stack Development, SQL, Webpack, User Experience (UX), User Interface (UI), API Development
Team Lead
2017 - 2020
PlayON
- Drove cultural and process change in the company, leading a team of five developers.
- Migrated the entire infrastructure from Rackspace to AWS.
- Created the Official Formula 1 Fantasy game—from draft to live in under two months.
Technologies: Linux, JavaScript, Amazon Web Services (AWS), Ruby, Scrum, CSS, Redis, Ruby on Rails (RoR), HTML, Bootstrap, React, Agile Software Development, Front-end, MySQL, CSS3, PostgreSQL, HTML5, Full-stack, APIs, WebStorm, Entrepreneurship, UI Components, Material UI, Storybook, Microservices, Docker, Architecture, XML, Responsiveness, Fantasy Sports, API Integration, Front-end Development, UI Design, DevOps, JSON, OAuth, RESTFul APIs, OAuth 2, Payment Gateways, Full-stack Development, SQL, User Experience (UX), User Interface (UI), API Development
WordPress Plugin Developer
2014 - 2017
Pure Charity
- Established a boilerplate plugin to ease the creation of Pure Charity's plugins.
- Created a base functionality plugin to be cloned for new instances.
- Created four other plugins using the boilerplate plugin and established patterns.
- Developed and modified several API endpoints on the Rails side.
- Made all plugins public and open-source and adopted by a variety of companies.
Technologies: Linux, JavaScript, Scrum, CSS, WordPress, PHP, HTML, Ruby, Ruby on Rails (RoR), Agile Software Development, Front-end, MySQL, CSS3, PostgreSQL, HTML5, APIs, WebStorm, UI Components, Microservices, Architecture, XML, Responsiveness, API Integration, Front-end Development, UI Design, JSON, OAuth, RESTFul APIs, SQL, User Experience (UX), User Interface (UI), API Development
Chief Technology Officer
2008 - 2014
Seekr
- Designed the user experience reference for the Seekr applications suite.
- Created a CSS pattern reference guide for the front-end developers and new employees to follow.
- Created functional tests for the Seekr Monitor application.
- Developed unit tests for the Seekr Monitor automated suite.
- Managed the development team for almost six years.
Technologies: Linux, JavaScript, Amazon Web Services (AWS), Ruby, Scrum, CSS, HTML5, CSS3, Ruby on Rails (RoR), HTML, Bootstrap, Agile Software Development, Front-end, MySQL, PostgreSQL, PHP, Full-stack, APIs, Entrepreneurship, UI Components, Microservices, Architecture, XML, Responsiveness, CTO, API Integration, Front-end Development, JSON, OAuth, RESTFul APIs, Payment Gateways, Full-stack Development, SQL, User Experience (UX), User Interface (UI), API Development
Technology Team Manager
2005 - 2006
InMeta Agência Digital
- Managed the developer team in small website projects.
- Developed small websites actively using PHP and Zend Framework.
- Conducted research to improve user experience-related flows.
- Created a reusable content management system to speed up website development.
- Created a CSS reference guide for new employees to follow.
Technologies: Linux, JavaScript, Amazon Web Services (AWS), Scrum, CSS, PHP, HTML, Bootstrap, Ruby on Rails (RoR), Agile Software Development, Front-end, MySQL, PostgreSQL, HTML5, WordPress, Full-stack, APIs, Entrepreneurship, UI Components, Architecture, Responsiveness, API Integration, Front-end Development, JSON, OAuth, Full-stack Development, SQL, User Experience (UX), User Interface (UI), API Development
Project History
Seekr Monitor
A social media monitoring system for the Seekr company in Brazil. In five years of operation from the ground up, it became the second most used social media monitoring tool in Brazil. It is now rebranded to Hi Platform.
Seekr SAC
A customer support tool for social media that works in parallel with the Seekr Monitor. This tool was established to help transition from previous generation customer support, i.e. customer centers, to the digital era through social channel support.
Official Fantasy Formula 1 Game
http://fantasy.formula1.comLed the development team behind the Official Fantasy Formula 1 game. The team was composed of:
• Two front-end developers using Ember.js
• Two back-end developers using Ruby on Rails
• One DevOps (myself)
The full initial game was built in under two months and was a launch success, with 35,000+ users signing up within the first 24 hours. Concurrent user count reaches peaks of 5,000.
The game concept was created in a joint effort by PlayON and Formula 1 teams and was long awaited by Formula 1 fans around the world.
It's a free-to-play game with rewards for the top three scoring teams at the end of the season.
• Two front-end developers using Ember.js
• Two back-end developers using Ruby on Rails
• One DevOps (myself)
The full initial game was built in under two months and was a launch success, with 35,000+ users signing up within the first 24 hours. Concurrent user count reaches peaks of 5,000.
The game concept was created in a joint effort by PlayON and Formula 1 teams and was long awaited by Formula 1 fans around the world.
It's a free-to-play game with rewards for the top three scoring teams at the end of the season.
New Simulation Tool for Grid Singularity
I developed the new generation of the D3a.io portal to modernize and bring ease of use to new and existing users. Using new 3D visualization modes, I completely redesigned the app and continue to improve it.
Moonsama Gaming Platform
The project is a gaming platform with the mission to bridge the gap between Web2 and Web3 gaming, bringing together all the benefits of blockchain technology, along with incentives for everyone. It's a decentralized platform where anyone can host a tournament, assisted by the most cutting-edge Web3 tech.
The development is continuous and new features are added every week.
I built this project from the ground up by myself, from database schema to end-user interface.
The development is continuous and new features are added every week.
I built this project from the ground up by myself, from database schema to end-user interface.
Certifications
JULY 2011 - PRESENT
Empretec
SEBRAE
Skills
Libraries/APIs
React, Node.js, React Query, API Development, Web3.js
Tools
WebStorm, Figma, MetaMask, Webpack
Languages
JavaScript, CSS3, HTML5, Ruby, HTML, CSS, TypeScript, PHP, XML, SQL, Solidity, GraphQL
Frameworks
Ruby on Rails (RoR), Bootstrap, Material UI, OAuth 2, Next.js, NestJS, Tailwind CSS, React Native, Electron, Jest, Redux
Paradigms
Agile Software Development, Scrum, Microservices, DevOps, UI Design
Platforms
Amazon Web Services (AWS), Blockchain, Linux, WordPress, Ethereum, Docker
Storage
MySQL, JSON, PostgreSQL, Redis
Other
Front-end, Entrepreneurship, Full-stack, APIs, Chakra UI, Crypto, UI Components, Design Systems, Architecture, Responsiveness, Fantasy Sports, CTO, API Integration, Front-end Development, OAuth, RESTFul APIs, Full-stack Development, User Experience (UX), User Interface (UI), GraphQL Code Generator, Storybook, Web3, DApps, Ethers.js, AI Tools, Tailwind UI, Artificial Intelligence (AI), Payment Gateways, Supabase
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