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Tech Lead · Synup · Bengaluru

Sayantan Ghosh

I lead a team building production AI agents — and the evals, tooling and inference behind them.

Frontend-leaning fullstack, now mostly AI engineering. I like the problems where nobody has decided what the answer is yet.

Sayantan Ghosh

80%

fewer tokens per request, after re-architecting an agent's tool surface

6

stages of the agent owned end to end — architecture through to inference

2

open-source developer tools shipped and published this year

4

junior engineers mentored into full-time roles

Experience

Where I have worked

Most of it in one place

Now · Jun 2026 – Present

Tech Lead — Synup

I lead the AI product line — architecture, retrieval, tool surface, evals and inference, and the team that ships it. I also build the internal platforms the engineering org runs on.

Architecture

LangGraph state machines — tool use that is explicit and resumable.

Retrieval

RAG over a SQL vector store, grounding measured not assumed.

Tool surface

MCP servers built and integrated; the tool catalogue re-architected.

Observability

Every run traced in LangSmith, so regressions surface early.

Evaluation

Golden conversations gating every prompt and model change.

Inference

Open-weight models self-hosted on Runpod, chosen per workload.

80%

fewer tokens per request

6

stages owned, architecture to inference

  • Took an agent from research question to production, then built the eval harness before scaling it — nothing ships unless the run is green.
  • Cut tokens per request by 80% by re-architecting how the tool catalogue reaches the model.
  • Replaced a third-party issue tracker with an in-house platform and drove the migration — pilot team, automated import, parallel run, hard cut-over. An MCP integration was the lever: it offered something the incumbent could not, so the new tool became the path of least resistance rather than a mandate.
  • Built that platform end to end on React, FastAPI, PostgreSQL, Redis, Kafka and Elasticsearch.
  • Own the Python services behind the AI features alongside the React front end, and review on both sides of the stack.
  • Mentored four junior engineers into full-time roles.
  • LangGraph
  • LangChain
  • LangSmith
  • MCP
  • FastAPI
  • SQL vector store
  • Runpod
  • React

Also worked with — Azure AI Foundry

Oct 2022 – May 2026

Senior Software Engineer — Synup

Several products had drifted into their own versions of the same buttons and tables. Standardising them was a consensus problem more than a coding one: I brought the frontend engineers across teams to a single component contract rather than mandating one. Internal developers were the customers — adoption was the metric, not the release.

  • Led UI for new marketing products and mentored junior engineers, improving onboarding efficiency by about 25%.
  • Led 50 CRM integrations processing over 2M mailbox messages a month, and built a unified email-parsing suite behind them.
  • Integrated ag-Grid and dnd-kit for complex data and drag interactions, lifting functionality and UX by over 20%.
  • Refactored the legacy codebase solo: build times down 15%, page response down 10%.
  • React
  • TypeScript
  • Storybook
  • Apollo GraphQL
  • Next.js

May 2021 – Oct 2022

Software Engineer — Synup

Made test-driven development the company standard — post-release defects fell 18% and code quality rose 25% — and shipped the social and CRM integrations that grew revenue 10%.

  • React
  • TypeScript
  • Express
  • PostgreSQL

Senseforth AI

Software EngineerJun 2020 – May 2021

Upgraded a conversational chatbot platform for the BFSI domain, improving response times 15%, and cut marketing email templating effort 30% with a mini framework.

  • React
  • TypeScript

Compile Inc.

Software DeveloperApr 2020 – Jun 2020

Built a data-visualisation frontend for the life sciences sector, lifting platform adoption 20%.

  • Vue.js
  • Django

Impact Analytics

Software EngineerJan 2019 – Mar 2020

Full-stack retail allocation apps; data consistency and UX up 22%, API latency down 15%. Won an internal hackathon for the most realistic solution of 15 entries.

  • React
  • Node.js
  • PostgreSQL

Tata Consultancy Services

Assistant Systems EngineerJul 2017 – Jan 2019

Delivered five or more critical Java and Spring Boot modules on schedule, migrating customer applications off legacy stacks. Led a three-person team to first place in a business-unit hackathon for AWS microservices.

  • Java
  • Spring Boot
  • Angular

Selected work

Things I built and shipped

Open source, in the open. Both solve a problem I had first.

claix

A terminal UI for your Claude Code sessions

5

Claude Code scatters sessions across every project you have ever opened. claix indexes them all, makes them searchable, and resumes any of them in the right directory. One static binary, zero config.

install
brew install sayantanghosh-in/tap/claix
  • Go
  • Bubble Tea
  • Homebrew

swale

A developer assistant that lives in your terminal

Your pull requests, LeetCode streak, notes and todos in one local SQLite database — with an agent on top that decides for itself which to read. Works offline, against a model on your own machine.

install
npx @itssayantan/swale
  • TypeScript
  • Node
  • SQLite
  • Vercel AI SDK