Vishal Gupta
Vishal Gupta

Vishal Gupta

Backend & Systems Engineer

Available for Roles

I build backend systems that stay reliable when things get complicated.

Backend & systems engineer focused on distributed systems, databases, concurrency, performance, and observability.

Projects

Flagship systems, multi-tenant SaaS & AI workspaces

Multi-tenant SaaS · Link infrastructure & analytics

Linkforge multi-tenant SaaS analytics platform dashboard

Production-ready link infrastructure featuring tenant-isolated data partitioning, atomic vanity handle mutations, and low-latency clickstream analytics.

Multi-TenancyAnalyticsPostgreSQLNext.js
Testing Phase

AI agentic canvas · Diagram synthesis & workspace

Infinity AI-agentic whiteboard architecture canvas and diagram generator

Agentic vector whiteboard translating architectural prompts into geometry-validated schemas with debounced state persistence on Neon PostgreSQL.

AI Agentic CanvasDiagram SynthesisNeon PostgreSQLNext.js

Engineering Behind the Projects

I don't just ship the happy path. I investigate what happens when systems fail.

All Postmortems
Security & Incident PostmortemHIGH
March 2026 · 6 min read

OAuth State Mismatch & Session Reliability

Diagnosis and remediation of cross-origin OAuth verification rejections, cookie scoping boundaries, and dual-origin handshakes across Next.js and Express.

Domain: LinkForge · Express AuthRead Postmortem→
Concurrency & Architecture
August 2026 · 12 min read

What Happens When You Click Buy Twice?

A deep dive into race condition windows, idempotency keys, database isolation levels, and transactional rollbacks under high concurrent traffic.

Domain: Distributed Systems · RedisRead Deep Dive→

Evidence-Based Technical Stack

No subjective skill percentages. Click any technology to inspect its verified production evidence.

Languages & Runtimes

Backend & Systems

Frontend & UI

Infrastructure & Tooling

Production Evidence: PostgreSQL(Backend & Systems)
Verified in Codebase

Primary relational storage with transactional isolation and index optimization.

Deployed in Systems:

  • LinkforgeTenant-partitioned schema with atomic username mutation rollbacks.
  • InfinityNeon Serverless PostgreSQL storing debounced canvas state & JSON diagrams.
  • CareerlyRelational user assessment schemas & interview question persistence via Prisma.

Build Log & System Milestones

Chronological engineering activity, production investigations, and architectural deployments

LinkForge Database & Node.js Warning Diagnosis
April 2026Investigation

Investigated MaxListenersExceededWarning on ServerResponse and tuned pg-connection-string SSL parameters to mitigate 700ms+ database latency spikes.

OAuth Cross-Origin State Incident Resolution
March 2026Investigation

Resolved cross-origin OAuth state verification failures and cookie scoping boundaries between Express auth service and Next.js client.

LinkForge Multi-Tenant Architecture Milestone
March 2026System Architecture

Implemented tenant-isolated PostgreSQL partitioning, transactional handle renames, and decoupled async clickstream telemetry pipeline.

Infinity Debounced Persistence Engine
February 2026Milestone

Constructed 10-second debounced state normalization pipeline syncing Excalidraw vector elements to Neon PostgreSQL via Drizzle ORM.

Clariv Semantic Document Pipeline
January 2026Milestone

Shipped document chunking pipeline using Google GenAI SDK to synthesize structured tables and summaries from dense 40-page PDFs.

Contributions

Open source commits, telemetry & continuous delivery

Available For Roles & Systems Collaboration

Have a hard backend problem?

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Open for backend & systems engineering roles, architecture reviews, distributed systems collaboration, and technical discussions. Send a direct note or connect below.

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