Mohith N

• Architected and built the backend from scratch using FastAPI in a serverless AWS Lambda setup (via Mangum); enabled scalable and cost-efficient infrastructure for an early-stage construction project management platform (serving ~50 users with 10–15 DAU)
• Designed RESTful APIs supporting multi-role workflows (admin, supervisor, client) for project tracking, expenses, daily logs, document management, transactions, and punch-list issue tracking; enabled end-to-end digitization of construction project operations
• Implemented secure authentication using phone-based OTP, JWT access tokens, and rotating refresh tokens; ensured seamless session continuity and improved reliability of login flows (24-hour token rotation with near-zero unintended session drops)
• Optimized PostgreSQL performance with indexing and query improvements, eliminating N+1 query patterns; improved query efficiency and reduced backend response overhead
• Designed direct-to-S3 file upload flow using pre-signed URLs to bypass backend as a data proxy; reduced server load, avoided redundant data transfer, and improved upload efficiency (eliminated double network hop for file uploads)

• Developed backend services using Django for a student career counseling platform; enabled structured processing of academic and behavioral data for student insights
• Designed and implemented APIs to compute student performance metrics and predict future grades using heuristic-based logic; enabled data-driven evaluation and personalized academic guidance
• Built a quiz and assessment system evaluating aptitude across domains (math, reasoning, vocabulary) and mapping results to personality-based career insights; enabled personalized career recommendations and counseling workflows (supported multi-section assessments with dynamic scoring)

A multi-tenant realtime hospitality platform built around shared table sessions, with Redis-backed WebSocket fan-out, idempotent ordering, and strict tenant isolation.

Independent tenant-isolation security review closed

A segmented write-ahead log with CRC32C integrity checks, group commit, deterministic crash recovery, checkpoints, fault injection, and operational tooling.

~1M records/sec replay · 90+ tests · race-safe concurrency

Priority scheduling, delayed retries, worker recovery, and end-to-end observability, tested under sustained concurrent load and failure scenarios.

~295K requests · 0 API errors · ~153 req/s breakpoint

A URL-shared collaborative drawing surface using Yjs CRDTs and a binary WebSocket protocol, load-tested to find its real operating limits.

150 concurrent users · 100% connection success