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Sumedh Sangle

Crafting scalable digital experiences with code and creativity. Let's build something amazing together.

Pune, Maharashtra, India

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© 2025 Sumedh Sangle. All rights reserved.

Selected Works

A selection of production systems and engineering-focused projects I’ve worked on.

Enterprise & Internship

Focus: Backend architecture & data consistency
Enterprise Testing Platform
Internship @ Gryphon Academy

Enterprise Testing Platform

An online examination system built to handle burst traffic during exam windows, with a backend optimized for write-heavy workloads and consistent data persistence.

Key Engineering
  • Handled 1,000+ concurrent users during peak exam windows.
  • Optimized write-heavy workloads for subjective & MCQ responses.
  • Designed backend workflows to guarantee write consistency for exam submissions under concurrent load.
Rest APINextJsFirebaseMongoDB
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Certificate Issuance System
Internship @ Gryphon Academy

Certificate Issuance System

A secure, role-based automated workflow for generating and verifying student credentials.

Key Engineering
  • Implemented strict RBAC for Students, Admins, and Superadmins.
  • Automated approval pipelines reducing manual verification time.
  • Generated tamper-proof PDF credentials dynamically.
ReactJsWorkflow AutomationPuppeteerAWS S3AWS RDSexpress.js
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CRM: Financial Budget Module
Internship @ Gryphon Academy

CRM: Financial Budget Module

A financial oversight module ensuring data consistency across departmental expenditures.

Key Engineering
  • Digitized Purchase Order (PO) workflows for vendor management.
  • Enforced atomic transactions to ensure budget data integrity.
  • Real-time tracking of utilized vs. allocated funds.
ReactFirebaseFinancial Logic
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System Design & Open Source

Full Stack Social
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DebugDen Q&A Platform

A developer community platform featuring reputation systems and AI-assisted answers.

Modeled complex relational data (Questions -> Answers -> Comments).
Implemented reputation-based voting logic similar to StackOverflow.
Integrated AI for automated answer suggestions.
Next.jsAppwriteZustandTailwind
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Security & DevOps
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NextJS Secure Auth Template

A production-ready authentication boilerplate implementing industry standard security patterns.

Implemented robust JWT Access/Refresh token rotation.
Designed secure session persistence and protected route barriers.
Reusable modular architecture for rapid SaaS deployment.
JWT Access/Refresh TokensSession PersistenceRoute ProtectionSecurity Patterns