Donaldo
From Guatemala (GMT-6)
5 years of commercial experience
Lemon.io stats
1
projects done224
hours workedOpen
to new offersDonaldo – React, React Native, Typescript
Sebastian, a seasoned Front-End and Mobile Developer, is your React Native expert, known for optimizing app performance and ensuring seamless usability on various screen sizes, including TV apps. His remarkable achievement includes independently customizing React Native's Flatlist component. What truly sets Sebastian apart is his sense of responsibility and dedication to delivering top-quality work. His motto, "The way to learn fast is to act now," reflects his proactive approach to growth and excellence. Beyond coding, you'll find Sebastian exploring his passion for enduro in his spare time.
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Potentially possibleExperience Highlights
Senior Software Engineer
This is a Canadian company that operates a diverse portfolio of media assets. It includes several radio stations and digital platforms, delivering a variety of content ranging from news and entertainment to music and sports. The company focuses on serving local communities with high-quality media services, engaging audiences through both traditional and digital channels.
- Created a new architecture for server-driven UI, just as Shopify for creating stores;
- Developed the mobile app;
- Built the web application's core using Typescript and Next.js;
- Created e2e and unit tests.
Senior software Engineer
This application is designed to revolutionize communication. It utilizes geofence technology to allow users to view posts within a selected perimeter.
- Created front-end architecture;
- Created landing website in Next.js;
- Wrote unit test cases;
- Integrated with maps and camera/camera roll;
- Redisigned the Figma for the app;
- Created mobile app in both iOS and Android, creating CI/CD for sending it to testflight and Google Play;
- Created mobile app version on the web with React.
Project Manager, Tech Lead
Is a CRM for clients in Spain which are mainly universities.
- Checked project roadmap;
- Created an API consolidating many APIs like META, Linkedin, etc;
- Developed the architecture of the project.
Software Developer, Team Lead
It's a streaming platform in India.
- Migrated all the code to a new architecture I created in previous projects;
- Lead the migration at a technical level;
- Created CI/CD pipelines.
Team Lead
It's a sports-based application in the Philipines that live streams events and has pre-recorded content.
- Established the front-end architecture;
- Implemented payments APIs;
- Made sure the libraries I created were maintained adequately by making CI/CD pipelines and checking PRs;
- Supervised a team;
- Conducted code reviews.
Tech Lead
It's a product app designed as a template to onboard clients as soon as possible.
- Came up with a front-end architecture and redesigned the existing front-end;
- Built Figma designs hand-to-hand with a team of designers;
- Crafted a common architecture to involve both TV and mobile apps with a shared directory;
- Created a focus library for tvOS to get a native focus navigation without any delays;
- Solved issues in CPU usage, memory RAM usage, application size, FPS, and time to interaction;
- Liaised with a team of cybersecurity engineers to ensure application safeness;
- Implemented analytics, IAP, video player, push notifications, and Firebase Crashlytics;
- Contributed to the React Native community, fixing RTL issues in libraries as React Native pager view;
- Wrote unit, integration, and e2e tests.
Team Lead
It's a streaming application in the United States.
- Maintained the app and added new features;
- Performed code reviews;
- Oversaw interactions with the client.
Tech Lead
It's a big OTT streaming app in India.
- Crafted the web architecture and optimized the app;
- Came up with SSR for app deployment and built deployment pipelines;
- Created Node server and utilized Docker and Kubernetes;
- Lead a team of 11 developers;
- Participated in discussions with clients;
- Did code reviews.