Vinay Kumar

Frontend Developer with 3 years of production experience building responsive, high-performing web applications in React.js and Next.js. Skilled at translating UI/UX designs into clean, reusable, component-based architectures, with a strong focus on performance — driving 40% gains through code-splitting, lazy loading, and memoization — and cutting code duplication by 35% through reusable component design. Experienced integrating REST and GraphQL APIs and authentication (JWT, OAuth2, SSO) into production systems, using Git-based source control and Agile workflows to ship in cross-functional teams.

Currently expanding into server-side rendering (SSR/SSG), Core Web Vitals, and technical SEO.

Frontend Developer at RandomTrees (2023-09 – Present)

• Owned the frontend build end-to-end for a browser-based system that monitors candidates in real time, with no additional hardware required on the candidate's side.
• Built a proctoring engine using face-api.js for face and eye tracking, paired with WebRTC-based interview rooms supporting JWT authentication, device selection, and automatic reconnection handling.
• Implemented batched trust-score updates every 5 seconds to flag suspicious behavior in near real time without overloading the client.
• Cut administrative monitoring effort by 40% and improved candidate completion rates by 25%.
• Owned frontend architecture for a centralized CRUD dashboard used to track and manage enterprise resources in real time.
• Centralized application state with Zustand, replacing scattered local state and reducing state-related bugs across modules.
• Integrated Azure MSAL SSO and OAuth2 for enterprise authentication, with JWT-based fallback login for edge cases.
• Integrated an existing GraphQL API into the frontend to support Microsoft-based (Azure AD) login as part of the SSO authentication flow.
• Eliminated manual data entry and cut UI state inconsistencies by 30%, driving adoption across the organization.
• Solo-owned the frontend for an AI-powered platform converting natural language input into SQL queries and executing them against BigQuery in real time.
• Built the full prompt-to-SQL interaction flow, including chat history with query search and exploratory data analysis (EDA) reporting with automated outlier detection.
• Designed interactive chart pinning and a dashboard launcher using Plotly.js, ApexCharts, and D3.js, enabling multi-format data visualization from a single interface.
• Integrated 15+ backend API endpoints spanning SQL generation, execution, visualization, and reporting, coordinating closely with backend engineers on contract design.

B.Tech in Electronics & Communication Engineering – Joginpally B.R. Engineering College (2022)