Maciej – Typescript, JavaScript, React

A digital market for institutional investors created by one of the largest investment banks in the world, delivering unparalleled, cross-asset access to global markets.

• Created new functionalities based on business requirements, often associated with large amounts of data and WebSocket communication;
• Added new graphs based on the D3 library;
• Fixed errors in existing applications;
• Expanded the library of UI components;
• Wrote unit tests;
• Created E2E tests using the client's framework.

Project for a leading bank in Iceland to replace a set of customer service applications with a single web solution.

• Delivered required functionalities;
• Analyzed and improved app's performance;
• Performed backlog refinement and code review of each PR;
• Did unit testing.

A project aimed to replace the old Flex application with a modern React interface and improve the skills of client programmers. The client was a Chinese bank.

• Created React app architecture;
• Delivered required functionalities;
• Conducted discussions with design and product teams;
• Analyzed and improved app's performance;
• Reviewed other developers' code;
• Resolved urgent problems to keep the team running;
• did unit testing.

A project developed to allow customers to create their own distributed ledgers, and manage the nodes and applications permitted to connect to them.

• Set up React application;
• Developed functionalities against mocked API;
• Coordinated UI work;
• Helped Product Owner to manage product backlog;
• Integrated with dockerized client's API;
• Created UI testing stack;
• Did unit testing.

The prototype illustrated the potential viability of using distributed ledger technology (DLT) as a core component of HKEX’s strategic infrastructure.

• Created React app architecture and developed the app from scratch;
• Coordinated UI work;
• Introduced WebSockets and ensured real-time application state;
• Built expanded testing stack;
• Designed API;
• Did unit testing.

The project aimed to standardize and automate cash notifications to minimize risk and optimize efficiency. The client was a British multinational asset management company.

• Implemented new features;
• Fixed bugs;
• Did unit testing.