> INITIALIZING_RU_OS_V2.6...
Rupraj Singh is a Full Stack Software Engineer specializing in React, Next.js, Node.js, WebSocket systems, and modern frontend architecture.
Rupraj Singh is a Full Stack Software Engineer from India with over two years of experience building scalable web and mobile applications. His work focuses on frontend architecture, UI and UX quality, and real-time systems using React, Next.js, Node.js, and WebSockets.
SYS: ONLINE
LOC: MUZAFFARPUR, INDIA
ID: RUPRAJ_V2.6
Rupraj
Full Stack Software Engineer with 2+ years of experience building scalable web and mobile applications. Strong focus on frontend architecture, UI/UX quality, and real-time systems.
Expertise
Frontend
Backend
Mobile
Infra & Database
EXPERIENCE
Yukthi Systems Webmail
Enterprise-grade webmail product and admin panel used by a large-scale user base.
AtticBits Workstation Platform
All-in-one business and HR management workstation designed for internal teams and client operations.
E-Commerce Platforms
Offline and online e-commerce platforms with POS systems and centralized admin control.
Work
PdfWarden
Secure PDF sharing SaaS with per-link access controls (password, expiry, email gate, watermark), page-level heartbeat analytics, RAG-based AI Q&A over documents, and multi-payment-gateway subscription billing across Razorpay, PayPal, and Paddle.
Trajectory
Full Stack Developer
07/2026 - PresentFrontend Developer
08/2025 - 07/2026Software Engineer
09/2023 - 08/2025Full Stack Developer
01/2024 - PresentOpen Source
Enterprise mail infrastructure built at Yukthi Systems, released publicly under GPL-3.0.
WebMail-UI
The main webmail client — React 19, Vite 6 and TypeScript, with TanStack Router/Query, Jotai, Tiptap rich-text editing, and DOMPurify-hardened email rendering.
Phoenix-Admin-UI
Admin panel for managing mail services, domains, organizations, and policy — React + Vite with role-based views and i18n support.
Archive-UI
Compliance-grade email archiving console — search, .eml preview, 2FA, role-based access control, and full audit logging.
IMAP-To-SMTP-Sync
High-throughput Go CLI that syncs millions of emails from an IMAP mailbox to an archive server over SMTP, with resumable state and UIDVALIDITY tracking.