Integral part of a fast paced team of developers assigned to the main project of a fintech company with a 8 million dollar fund series A.
Integral part of a fast paced team of developers assigned to the main project of a fintech company with a 8 million dollar fund series A.
Architectured the backend that serves the 150k users with Koa/Express, TypeScript and MongoDB, boosting performance by up to 300% in comparison with the first version. Initiated the shift to Go for further improvement. Transitioned the database architecture from MongoDB to PostgreSQL with zero downtime, ensuring data integrity through custom migration scripts. Automated the deployment process for seamless, human-independent updates, supported by extensive unit testing ensuring over 75% code coverage.
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Frontend app structure
Architectured the frontend using Ionic and Angular as the
framework. Documented it so that other developers could easily
follow the same paradigm. Fully typed with TypeScript.
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Database architecture
Started with MongoDB and later on moved to PostgreSQL. Designed
the architecture of the old MongoDB and the new PostgreSQL
database and created scripts to ensure the data is converted and
reliable. These scripts have been running without the users
feeling any kind of downtime.
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Web / Mobile app UI components
Created several UI components with Ionic / Angular to fulfill the
vision of the design. Focused mostly on the feed, notification and
chat systems.
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Backend development
Architectured and developed the whole backend with Koa / Express
as the http library, TypeScript as the main programming language
and a modified Domain-Driven Design pattern to be used as
structure. This change provided the developers a better quality of
code and the performance speed has improved in some instances
300%. Now in the process of converting to Go following the same
structure and pattern.
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SDK library
Created a SDK library to be used internally to connect to the API.
A simple way for the frontend developers to communicate to the
backend and have the code fully typed with TypeScript. This
library provided as well the interaction to the WebSocket used on
the chat and notification systems.
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Deployment process
Developed the deployment process used on the backend system. Unit
tests run, the project is created under a Docker container,
uploaded to S3 and then sent out to the Elastic Beanstalk to be
deployed. The whole process doesn’t need any human interaction
besides managing through PRs what goes into the staging and
production branches that will automatically deploy to the
respective environment.
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Unit tests on the backend
Created tests for every section of the backend. Development was
done under TDD and as such, the code coverage is over 75% . The
project isn’t able to deploy without passing all the tests and
ESlint rules.
Integrated various technologies like WebSockets for chat and streaming for a whiteboard. Refactored the backend using Node, GraphQL and PostgreSQL and decreased the requests time by 50-70%.
- Used React as the main framework for the frontend
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Integrated various technologies like WebSockets for chat and
streaming for a whiteboard
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Refactored the backend using Node, GraphQL and PostgreSQL and
decreased the requests time by 50-70%
API sdk to use with the Elasticsearch of the backend. Frontend integration of the Elasticsearch filters. Visualization of data coming from backend.
- API sdk to use with the Elasticsearch of the backend
- Frontend integration of the Elasticsearch filters
- Visualization of data coming from backend
Developed and architectured the backend that integrated various external APIs like Google API, Dropbox API, Office API and aggregated them into a single API to be used by the main project.
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Developed and architectured the backend for the aggregator API
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Integrated various external APIs like Google API, Dropbox API,
Office API and aggregated them into a single API to be used by the
main project
Developed institutional websites, games and applications for variety of clients.
Developed institutional websites, games and applications for variety of clients.
Implemented standards for the company 30 developers to follow and consequently attain a better code quality. Developed institutional websites and applications for various clients like for example Leviton.
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Implemented standards for the developers to follow and consequently
attain a better code quality
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Developed institutional websites and applications for various
clients like for example Leviton
Worked in the backend and frontend of the notification, events and playlist sections that served the 1 million registered users. Developed the translation manager that was being used by the translators to handle the multiple text throughout the application.
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Part of the integrated front end team which took care of the
styleguide and all you can see in the browser.
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Main developer of the translation manager that was being used by the
translators built in Node
Developed games, 3D environments, custom applications and other in-house software to showcases the abilities of the main product, the ability to interact with 3d sensors like the Kinect.
Developed games, 3D environments, custom applications and other in-house software to showcases the abilities of the main product, the ability to interact with 3d sensors like the Kinect.
Developed websites and games for various different clients: GoBulling, PortugalTecnológico, Universidade Católica, Condaltom, Jack Malipan, Mota-Engil...
Developed websites and games for various different clients: GoBulling, PortugalTecnológico, Universidade Católica, Condaltom, Jack Malipan, Mota-Engil...
Developed institutional websites and branding for various clients
Developed institutional websites and branding for various clients