Daniel Jablonski

Owned end-to-end delivery of web features spanning React frontends, API services, and data layers, with emphasis on performance, reliability, and integration. Integrated Ethereum wallet connections using Web3.js for secure smart contract interactions. Implemented real-time UI updates via WebSocket events, optimized rendering and API usage, and designed authentication flows with JWT-based security. Collaborated with backend teams to align smart contract events with API contracts and frontend state, and established CI/CD pipelines and monitoring for reliable deployments.

Developed production-grade React and TypeScript UIs tightly integrated with REST and GraphQL APIs; built reusable UI components and shared state patterns; implemented token-based authentication; enabled real-time feedback; collaborated with QA and product teams to improve automated testing and reduce regression risk.

Delivered client-facing web systems from discovery through production, focusing on clean architecture, integrations, and iterative delivery. Built backend integrations with third-party systems to ensure reliable data exchange and predictable frontend behavior. Introduced API versioning, feature flags, and structured logging to improve deployment safety and debugging efficiency. Worked directly with stakeholders to demo frontend functionality, gather feedback, and iterate within agile sprint cycles. Mentored junior engineers on frontend patterns and TypeScript codebases.