Kuanysh Tokanov

Designed and built a full-stack application from scratch using the MERN stack; defined system architecture and data models; integrated Stripe for payments and Acuity for scheduling; supported 1500+ transactions and appointments; implemented end-to-end booking, payments, and scheduling flows; led deployment and production readiness.

Owned end-to-end delivery of product features across frontend (React/TypeScript) and backend services, contributing to domain-specific and cross-domain changes to improve system consistency and integration boundaries. Optimized page load performance for merchant workflows, reducing load times from 8–11 seconds to ~3 seconds by improving data fetching patterns, reducing unnecessary requests, and optimizing rendering logic. Improved system reliability by introducing structured error handling, logging, and monitoring for critical merchant-facing workflows. Identified and resolved performance bottlenecks in API communication and frontend data handling under real production load. Coordinated cross-functional efforts to align on scalable architecture and integration patterns. Ensured production readiness by incorporating observability, feature flags, rollback strategies, and post-release monitoring into the Definition of Done. Stepped into Engineering Manager responsibilities during patern

Created a user management tool for a client-enterprise application using React, Node.js, and a custom full-stack framework; defined and consumed API contracts for complex systems; contributed to frontend/backend integration and maintainability across frontend-backend boundaries.