About · Promit Biswas
Promit Biswas. Engineer. Writer.
Building at the seam between research and production — and writing about the operational craft of keeping AI systems reliable.
I build AI systems and write about the practice of building them.
Most of my work lives at the seam between research and production — the place where a clever paper has to turn into a reliable service, handled by a small team that’s already stretched thin. I care about the boring parts: observability, error taxonomies, the shape of an interface a stranger has to read at 3am.
Currently I’m building Clarity, a strategic intelligence platform that ingests what the internet is saying and surfaces what matters — routed to the channels you actually read. It’s quietly become my favorite system I’ve ever worked on.
Before that, senior engineering roles across startups and larger companies, mostly in infrastructure and platforms. I lead by writing, reviewing carefully, and defending the team’s ability to say “not yet.”
If any of this resonates, I’d be happy to hear from you.
◆ II · TRAJECTORY
The shape of ten years.
06 chapters · 2013 — now- VI 2022 — NOW
AWS — managing engineers.
Software Development Manager · Seattle
Left IC work to lead. The operating question shifted from "is this system provably correct?" to "is this team set up to make the next five years of calls correctly?"
nowBuilding the team - V 2021 — 2022
Amazon Music — fraud & content moderation.
Senior Lead SWE
Led the team; designed automated policy-violation detection for the Music catalog; architected a streaming fraud platform doing stateful ops over millions of events per second.
millions/sstateful events processed - IV 2020 — 2021
Alexa — teaching models to listen.
Senior SWE · Music Spoken Language Understanding
Led the launch of BERT-based NLU on Amazon Music voice UX across Alexa devices, plus online multi-armed bandit ranking for voice search.
BERTNLU in production on Alexa - III 2017 — 2020
Amazon — the detail page at 200k req/s.
SDE · Product Detail Page Platform
Semantic search on the PDP via deep-learning embeddings + ANN — 143 bps lift in instant-answer rate. Then an offer aggregation platform behind Home/Search/PDP handling 200K RPS at peak.
143 bpsinstant answer rate lift - II 2015 — 2017
Amazon.in — clothes, in the right size.
SDE · Fashion Shopping Experience
One of the first engineers on Amazon.in Fashion. Built the first globalized size-chart solution across marketplaces. A/B tests kicked in ~₹57MM in incremental annualized revenue.
₹57 MMincremental annualized revenue - I 2015 — 2017 · parallel
PregBuddy — the first hard thing.
Founding Engineer · Bengaluru
Nights and weekends: founding engineer at a pregnancy-care startup. Features, rating models, the blur of trying to make something exist from nothing.
0 → 1founding engineer
◆ Frequently asked
Three questions, answered.
- 01 What does Promit Biswas do?
- Promit is a software development manager working in AI and infrastructure systems. He leads engineering teams building production AI platforms and writes about the operational craft of shipping reliable AI systems.
- 02 What is the Clarity platform?
- Clarity is a strategic intelligence platform Promit built: it ingests primary-source content at scale, runs LLM analysis across multiple personas, and delivers synthesized briefings through the channels readers actually use.
- 03 Is Promit Biswas available for consulting?
- Reach out by email at [email protected] with context on the engagement. Responses are best-effort and depend on current availability.
- 04 Where can I find Promit elsewhere?
- GitHub at github.com/promitbiswas, LinkedIn at linkedin.com/in/promitbiswas, and via the RSS feed at promitb.dev/rss.xml.
◆ Elsewhere