Kuldeep Kushwah

3+ years of work experience

Sep 20233 yrs 1 moPresent

India

Client: Envestnet (Fintech) — Fastlink Platform Sep 2023 — Present • Independently architected and delivered Fastlink from scratch — a financial account aggregation platform serving 60+ enterprise users, built with React.js, Node.js, MongoDB, JWT, SSO, and OAuth 2.0 Client Credentials (CC) flow. • Designed a secure backend with JWT authentication, SSO, and OAuth 2.0 CC flow, reducing average API response time by ~25-30% over the legacy system. • Built a reusable React component library from zero, enabling faster feature iteration and consistent UI across the platform. • Owned production maintenance independently — handling incidents, deploying updates, and ensuring uptime with no dedicated support team. Client: BestBuy (E-commerce) — Product Listing Page team • Developed and maintained React components for BestBuy's high-traffic product listing pages, contributing to a customer-facing surface serving millions of users globally. • Implemented performance optimisations — lazy loading, code splitting, and render cycle improvements — reducing page load time and improving Core Web Vitals scores. • Worked on A/B testing and feature flag integrations, enabling controlled rollouts of new UI features without impacting the broader user base. • Ensured cross-browser and cross-device compatibility, resolving rendering inconsistencies across Safari, Firefox, and mobile viewports.