vishal patel
Case studies

Decisions, not buzzwords.

Each one follows the same structure: context → constraints → options → decision → outcome. Details are sanitised — no customer data or internal code.

// Core development

Platform capabilities and engineering tooling I designed and led.

01
Tech lead · Contentstack platform

Stopping unintended locale publishing: cross-locale release items

Enterprise customers were publishing content into markets it was never localised for, via master-locale fallback. I led the design that enforces the rule in the release service without breaking a single existing client.

api-designbackward-compatibilitymulti-localereleasesnode.jsmongodb
  • Rule enforced for every client (UI, API, SDK, CLI) — not just the UI
  • Zero new statuses, fields or error codes — existing integrations unaffected
  • Clear, different failure semantics for sync add, bulk add and deploy
02
Tech lead · Contentstack platform

Making branch merges explainable: per-item merge job details

Users merging content branches couldn't see what a merge actually changed, so they exported entire branches via CLI to diff them. I led the design that adds a per-item breakdown to the merge job API.

async-jobsapi-designbranchingobservabilitymongodb
  • Per-item visibility: added / modified / deleted, strategy and status
  • Global-field changes show every affected content type
  • Removed the need to export whole branches just to see what changed
03
Tech lead · Contentstack platform

Branch creation API: controlled environment cloning

Creating a branch cloned every environment's publish configuration, whether you wanted it or not. I worked on an explicit, validated control that's still backward compatible.

api-designvalidationbackward-compatibilitybranching
  • Explicit control: clone all, none, or a chosen list
  • Omitting the field keeps the old behaviour — no breaking change
  • Validated at the API edge, so bad requests fail fast
04
Tech lead · builder

AI-augmented engineering: setup agent, RAG knowledge app and LLM migration tooling

Three AI builds that removed real friction: a Claude-driven local setup agent for 60+ microservices, a RAG app over internal engineering docs, and an LLM pipeline that turns a legacy website into a CMS import package.

ai-agentsragllmdeveloper-experiencemigration
  • Local environment for 60+ services provisioned by typing "cms setup"
  • Grounded answers over internal docs with Pinecone retrieval
  • Legacy site → content model → import package, automated

// Customer solutions

Enterprise migrations and solutioning, from pre-sales to go-live.