Yaroslav – React, React Native, Node.js

The company is one of the world’s leading leisure travel groups, with over 220 trusted brands in 180 countries and more than 30 million customers. It fully or partially owns several travel agencies, hotel chains, cruise lines, and retail shops as well as five European airlines.

• Created and maintained web applications based on Microfrontend architecture pattern;
• Performed technical assessment of mockups/wireframes and architectural designs/specifications to ensure the possibility of their implementation;
• Extended and optimized existing Gitlab CI/CD pipelines;
• Defined and resolved complex domain-specific dependencies by communication with different company departments.

An iOS and Android app that helps with planning, conducting, and reviewing environmental research. Freelancers receive notifications about all platform updates and when they need to take action.

• Independently developed the application;
• Implemented the application based on provided Figma wireframes and designs;
• Provided feedback to designers by reviewing and assessing app design;
• Configured CI/CD pipelines for updating and building the application;
• Successfully published the application to both AppStore and PlayStore platforms.

Enterprise ChatGPT, the privacy and security-focused ChatGPT & Bard alternative.

• Built private enterprise chat GPT clone that uses Azure OpenAI;
• Created custom chat GPT that uses data from private confluence space
• Developed Python API that generates an answer for the chat GPT based on an in-context learning approach;
• Deployed Python API to Microsoft Azure and protected a web app with Azure AD authorization.

This is an ecological consultancy firm from the Netherlands that specializes in species inventories, ecological quick scans, and ecological guidance. They needed to build a platform for planning work for a season, taking into account a huge amount of conditions: from available research to sunrise.

• Created Front-end architecture and established development process;
• Developed private portal;
• Wrote unit and e2e tests using Jest and Cypress;
• Led a team of 5 Front-end developers;
• Build React Native mobile app for research (not published to AppStore yet);
• Integrated with complex ArcGIS map API: export/import of map points and polygons.

The company operates a platform where IT professionals can explore job opportunities while remaining anonymous. Candidates create profiles and allow companies to contact them without revealing their identities. Currently, the platform is suspended.

• Designed web app architecture and decided on tools and technologies to be used on the project;
• Developed complex Full-stack features;
• Wrote unit and e2e tests using Jest and Cypress;
• Led a team of 5 Front-end developers: helped to understand requirements, planned features architecture and development, code reviews, and personal growth;
• Worked closely with the designer and PO to build the most convenient UI with less development time to fit the project budget.

This is a start-up in the Netherlands that offers electric and luxury shared cars and intends to expand its products to scooters, bikes, and boats. They needed to build a mobile app where users could access their car rental services. The app was removed from AppStore as the company decided to close the stand-up.

• Created technical solutions for the project based on requirements;
• Built mobile app architecture;
• Developed React Native app using NativeBase UI library;
• Led a team of 2 mobile developers;
• Published mobile app to the AppStore.