Denys – React, JavaScript, Typescript

tvScientific is a high-growth MarTech platform specializing in Performance TV. By combining massive reach with sophisticated data science, the company empowers brands to treat television as a scalable, results-oriented performance channel.

• Architected and spearheaded the front-end infrastructure for a greenfield project, ensuring long-term scalability and high performance from the ground up.
• Established advanced technical standards and core patterns for the front-end team, significantly improving code consistency and development velocity.
• Re-engineered legacy solutions to align with evolving client strategic goals, resulting in enhanced user experience and better business outcomes.
• Designed and implemented a comprehensive testing strategy, including robust architectures for both E2E and unit testing, which increased deployment confidence and reduced production bugs.
• Seamlessly integrated diverse third-party data providers, optimizing data flow and ensuring reliable synchronization across the platform.
• Collaborated closely with the design team to refine UI/UX concepts, translating complex visual requirements into high-fidelity, interactive digital experiences.

A huge online video editor which provides you a rich functionality to create and edit marketing videos for your brand.

• Created front-end and back-end architecture;
• Redesigned the existing front end;
• Built front-end components library;
• Debugged and resolved the application issues;
• Wrote unit, integration, and e2e tests;
• Integrated with different providers;
• Refactored and rewrote legacy pieces of code according to the acceptance criteria from scratch;
• Discussed and provided the descriptions of features.

The project was on the stage of messed-up legacy code, which he had to prepare for a POC in the short term. The main issues were to set up a process of development and rebuild the architecture of the project's front-end part, as well as provide the best practices and rules for the future team's development. Also, working under the pressure of the coming deadline, the stack of the project was changed; the crucial features were reworked without clear acceptance criteria, which Denys also had to create from scratch, working with a main manager and stakeholder.

It is a platform for setting up your environment for scheduling, recording, and streaming events without any personnel. This platform allows you to buy software and book events.

• Created front-end and back-end architecture;
• Redesigned the existing front-end;
• Built front-end components library;
• Debugged and resolved the application issues;
• Wrote unit, integration, and e2e tests;
• Integrated with different providers (AWS, Nats servers, Bus streaming);
• Integrated media streaming process from the software to social platforms.

Large platform for searching and matching specialists inside the industry with the area of their proficiency plus specialists ordering. In addition, possibility to manage AWS services in a few clicks.

• Built the application architecture from scratch;
• Built front-end components library;
• Debugged and resolved the application issues;
• Wrote unit, integration, and e2e tests;
• Integrated with different providers.

The main idea of the project was to build a system that could be implemented in different hotels and let them organize ordering, processing, and shipping processes.

• Implemented difficult animation solutions adapted for all platforms;
• Prepared and supported architecture solutions of the team;
• Controlled code quality of the team.

The aim of the project was to develop a system for the company staff to maintain and schedule the transportation of high-load trucks.

• Built the system mainly using Java with JSF;
• Migrated JSF to Angular (the latest version) with modern architectural patterns and saved all the previous functionality;
• Controlled the quality of REST API services when the frontend part was being built.