Andrei – React, Redux, Lambda

A free-to-play poker platform tied to the World Series of Poker (WSOP).

• Developed full-stack web applications using JavaScript with React.js and Node.js (NestJS);
• Provided coaching and mentoring to junior developers to enhance team performance;
• Improved the application bundling solution, reducing the initial chunk size by over 40%;
• Implemented service workers with caching and precaching strategies, cutting initial load time by over 50%;
• Translated UI/UX designs into fully functional end-user features using React, Pixi, and other tools;
• Designed and built scalable front-end and back-end architecture.

Multi organization, multi user platform for recording and managing industrial measurements done via a device. Pub-sub functionalities were added to track live measurements on the application. Controlling a device using AWS IoT.

• Created front-end and back-end architecture;
• Implemented front-end UI;
• Implemented AWS Amplify from scratch;
• Added Appsync and GraphQL schemas;
• Created GraphQL resolvers with lambda function triggers;
• Added authentication via Cognito groups, adding the functionality to have multiple users and multiple roles (role-based access control).

National health system app, it includes a number of features to protect you, including alerts letting you know if you may have been exposed to coronavirus (COVID-19), the latest advice based on your circumstances, a symptoms checker and general information on COVID-19.

• Implemented microservices from scratch using Nodejs and AWS ecosystem
• Maintained and constantly updated the Api Gateway (openapi)
• Added and maintained new endpoints
• Did architectural meetings and planning
• Did estimation meetings
• Delegated tasks
• Did code reviews
• Did bug fixing
• Did unit testing

British multinational optical retail chain, which operates mainly in the UK. The chain offers optometry and optician services for eyesight testing and sells glasses, sunglasses, and contact lenses.

• Used graphql extensively
• Made unit testing
• Built front-end components custom library
• Did debugging, optimising the app

Participated in developing a web platform and presentation website for a green energy supplier, which provides the customers the ability to pay and manage their bills through blockchain technology.

• Implemented lazy loading on the entire application reducing the initial bundle size up to 50%
• Refactored the application to use Vuex state management stores and modules, every module being decoupled one from another
• Implemented new features which required a strong and constant communication with the team’s designer in order to deliver the product at the highest standards using Vue.js / React.js