Myroslav – React, React Native, Node.js

Self-custodial crypto wallet that lets users securely store, send, and swap digital assets, with built-in Web3 dApp integrations across multiple blockchains.

• Contributed to large open-source React Native application;
• Improved performance of the calculation-heavy UI screens, optimized caching and memoization of calculations, and composition of state with components;
• Enhanced performance and maintainability of critical UI flows by improving component architecture and data fetching;
• Led public technical discussions in GitHub via Pull Requests and Issues;
• Evaluated CI/CD infrastructure alternatives and their limitations to improve automated workflows of the project;
• Extensively tested the application, covered business logic with unit and end-to-end tests.

Debt pay-off application helping users manage debt intuitively, plan personal budgeting, and analyze bank account efficiency.

• Led development and enhancement of key application modules in a 3-person team, including a complete rebuild of complex budgeting functionality and a payment planner that accelerates debt repayment;
• Designed and implemented new features to meet business and user needs, including financial tracking tools, debt management systems, and customized budget planning utilities;
• Collaborated with cross-functional teams, including back-end developers and designers, to deliver a cohesive, user-centered financial solution;
• Integrated external services and APIs, including linking bank accounts via the Plaid SDK and Equifax data for faster debt repayment strategies;
• Maintained and improved application performance, including bug tracking and resolution via Sentry, ensuring a smoother user experience and higher app reliability.

Fintech analytics platform delivering real-time financial data visualization and reporting tools for large-scale datasets.

• Led a 5-engineer team, empowering engineers to take independent ownership;
• Owned frontend-heavy architecture and tech decisions;
• Successfully migrated GraphQL to tRPC for API communication, significantly reducing development overhead;
• Built high-performance financial UI for large datasets;
• Balanced on-demand work with architectural improvements.

Fintech CRM platform providing tasking, scheduling, and workflow management with advanced query-based search.

• Owned frontend architecture of a fintech CRM;
• Built tasking, scheduling, and workflow systems;
• Designed advanced query-based search and optimized rendering performance.

Cryptocurrency exchange SaaS platform enabling users to trade digital assets through a fast, reusable component-based interface.

• Built and maintained the frontend of a cryptocurrency exchange in Elm;
• Worked closely with backend engineers to design and integrate APIs;
• Implemented reusable UI components and application architecture;
• Participated in product planning and technical discussions with a distributed team.

Multicultural outsourcing agency delivering client projects across domains ranging from e-commerce and CMS platforms to custom business web applications.

• Worked on web and server application development for client projects;
• Communicated with the client, conducted code reviews, and managed tasks;
• Built and maintained web features, plugins, and integrations;
• Produced digital design assets when required.