Marcela is available for hire
Hire MarcelaMarcela Kashiwagi Silveira
Verified Expert in Engineering
Software Developer
Location
San Francisco, CA, United States
Toptal Member Since
June 20, 2012
Marcela is an experienced web and mobile developer from Brazil currently living in Silicon Valley. She has a very strong understanding of software architecture and also a very strong mathematical background. She was selected by ZDNet as one of ten most influential female tech innovators in Brazil, as well as mentioned on Mashable, Forbes, and others several times.
Portfolio
Calm.com
SwiftUI, Swift, Swift 5, Objective-C, Xcode, Mobile App Design, UIKit...
Toptal Clients
Cocoa Touch, UIKit, OAuth, REST, Core Data, Parse, Firebase, Swift, iOS...
Cabe na Mala
Ruby on Rails (RoR), Ruby
Experience
Availability
Part-time
Preferred Environment
REST APIs, Firebase, Parse, Swift, Objective-C, iOS, Xcode, SwiftUI
The most amazing...
...Thing I’ve built is my own startup, Cabe na Mala, which was acquired in 2016.
Work Experience
Senior Software Engineer, iOS
2021 - PRESENT
Calm.com
- Led different projects and worked in a cross-functional team to brainstorm ideas, build new features, and maintain existing ones.
- Created new experiments using LaunchDarkly and tracked success through Amplitude.
- Used different technologies and proposed ideas to improve code quality and unit tests.
Technologies: SwiftUI, Swift, Swift 5, Objective-C, Xcode, Mobile App Design, UIKit, LaunchDarkly, Amplitude
iOS Software Engineer
2012 - PRESENT
Toptal Clients
- Contributed to the development of iOS projects using Objective-C and Swift.
- Used different APIs and SDKs to create apps from scratch and submit them to the App Store.
- Maintained and added new features to existing apps.
Technologies: Cocoa Touch, UIKit, OAuth, REST, Core Data, Parse, Firebase, Swift, iOS, Objective-C, iOS SDK, Mobile App Design
CTO
2013 - 2016
Cabe na Mala
- Helped create this startup from scratch to exit.
- Managed the technical team, a team of 20+ people based in the US and Brazil.
- Planned, executed, and measured growth strategies, partnerships, and product development.
Technologies: Ruby on Rails (RoR), Ruby
Lead Software Engineer
2011 - 2012
Zign Marketing Digital
- Developed applications and games for the iOS platform using Cocos2D, Box2D and, Chipmunk frameworks, Game Center API, Facebook, Twitter, and LinkedIn Connect.
- Integrated with native web applications using JSON, SOAP, and REST web services.
- Integrated with live TV streaming.
- Developed web applications.
Technologies: LinkedIn API, Twitter, Facebook, GameKit, OpenGL ES, Chipmunk, Box2D, Cocos2d, Objective-C
Researcher
2010 - 2011
Signal Processing Laboratory (COPPE/UFRJ)
- Contributed to the NeuralTB project, which produces software supporting the diagnosis of pulmonary tuberculosis through neural networks.
- Developed a solution for checking, transmitting, and synchronizing the databases on mobile devices, in clinics, and in hospitals.
Technologies: Mobile, Databases
Software Engineer
2010 - 2011
UPlay Mobile
- Developed applications and games for iOS using Cocos2D, Box2D, and Chipmunk frameworks, Game Center API, Facebook, and Twitter Connect.
Technologies: Twitter API, Facebook, GameKit, Chipmunk, Box2D, Cocos2d
Software Engineer
2007 - 2010
Stone Age Tech
- Developed and integrated data mining algorithms, including decision trees, linear regression, and logic regression into the company’s applications.
- Developed a CCore database management system with an architecture that ensures high performance even with large volumes of data and compatible with leading market solutions.
- Collaborated with the engineering team for a data mining application in the Object Pascal programming language, including neural network algorithms, genetic algorithms, and automatic extraction of association rules (MBA - Market Basket Analysis).
- Collaborated with the engineering team on an application made in the Object Pascal programming language to create, visualize, and distribute reports used by a number of financial institutions: Itaú, Bradesco, Unibanco, Citibank, Credicard, and BV Financeira.
Technologies: Object Pascal
Experience
As an engineer in the consumer safety team, I have been working with both Objective-C and Swift, integrating with different RESTful APIs and GraphQL to develop new features and fix bugs for Reddit's iPhone and iPad applications. That has given me a lot of experience with large scale applications, how to automate the deployment process and do continuous testing.
Reddit has reported 430 million active users (2019) and is the third-most downloaded news app in the United States.
Reddit has reported 430 million active users (2019) and is the third-most downloaded news app in the United States.
HairLooks
https://apps.apple.com/us/app/hairlooks/id1401003479?ls=1HairLooks is a platform that curates images of work done nearby on hair like yours. Think of us as a cross between Instagram and Bumble for your hair. The user profiles their hair type, cut, color, and style; specifies a service they need; then views a grid of pictures of that service done on hair like theirs. The pictures shown are based on the user's proximity to nearby hairstylists. They can click into anyone to see the hairstylist that provided the service and how to book with them.
I developed the app from the ground up and submitted it to the app store, working as a full-stack engineer. I used Swift for the iOS app and Parse for the back end, and worked with a designer
I developed the app from the ground up and submitted it to the app store, working as a full-stack engineer. I used Swift for the iOS app and Parse for the back end, and worked with a designer
Dandelin
Dandelin is democratizing access to health care by allowing everyone to have unlimited consultations at the lowest price on the market.
I developed the app from the ground up and submitted it to the App Store. For this one, I developed the iOS app using Swift and worked with a back-end engineer who used Firebase. There was also an Android developer and a designer on the team.
I developed the app from the ground up and submitted it to the App Store. For this one, I developed the iOS app using Swift and worked with a back-end engineer who used Firebase. There was also an Android developer and a designer on the team.
In/Spree
An iOS app using Swift.
Lookwiz
An iOS app using Swift.
Esporte Interativo
An iOS mobile application.
Pilar na Grécia
An iOS mobile application.
Band News
An iOS mobile application.
Burger Mania
An iOS mobile application.
Vikings x Chickens
An iOS mobile application.
Frog Jump
An iOS mobile application.
Skills
Languages
Swift 3, Swift, Swift 4, Swift 5, HTML5, Objective-C, HTML, CSS, Swift 2, CSS3, Object Pascal, Ruby, JavaScript, PHP
Libraries/APIs
Google AdWords, REST APIs, Facebook API, OpenGL ES, LinkedIn API, Twitter API
Tools
Xcode, Sublime Text, LaunchDarkly
Paradigms
Object-oriented Programming (OOP), Scrum, REST, Mobile App Design
Platforms
iOS, Mobile, Parse, Parse Server, Firebase, Twitter
Other
Software Development, Facebook, OAuth, Amplitude
Frameworks
UIKit, SwiftUI, Cocos2d, Box2D, Chipmunk, GameKit, Core Data, Cocoa Touch, Ruby on Rails (RoR), iOS SDK
Storage
MongoDB, MySQL, Databases, PostgreSQL
Education
2011 - 2011
Executive Education Degree in Project Management
Fundacao Getulio Vargas - Brazil
2011 - 2011
Executive Education Degree in Business
Babson College - Massachusetts, US
2006 - 2011
Bachelor’s Degree in Compter Science
Universidade Federal do Rio de Janeiro - UFRJ - Brazil