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R.Karan · SDE · Full-stack

“Measure.Don’t tune for speeduntil you’ve measured.”

Rob Pike, Notes on Programming in C

I build systems and study how they behave under load.

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lattice

Pick a project to run its demo

Full write-up
Row window
847,21393.39
847,21487.00
847,21527.83
847,21695.70
847,21776.28
847,2183.74
847,21946.13
847,22076.10
847,22126.88
847,22297.72
847,22389.63
Rows
1,000,000
Row elements
11
DOM nodes in pool
…

Selected work

Click any project for the problem, the approach and the outcome in full.

Public repo

lattice

A spreadsheet-grade data grid for a million rows.

  • 1,000,000 rows over a fixed pool of ~560 DOM nodes
  • Formula graph on a Web Worker, so an edit touches 33 of 10,000 nodes
  • Recalc 316ms to 1.0ms, repaints at 3.4ms, on a low-end machine
TypeScriptViteWeb WorkerPlaywright
Read the full write-up
Live demo ↗ for latticeSource ↗ for lattice
Public repo

cacheopt

Cost-based query routing across a three-tier cache.

  • Estimates each query's cost the way a planner would, then picks the tier
  • Rewrites a query when a cheaper shape exists
  • 2.74x throughput at 10M rows, p95 126ms to 31ms
SQLRedisDuckDBQuery rewriting
Read the full write-up
Live demo ↗ for cacheoptSource ↗ for cacheopt
Public repo

relay

A Postgres-backed task queue with exactly-once side effects.

  • Fencing tokens reject writes from a worker that already died
  • Transactional outbox keeps the commit and the effect in one transaction
  • 22 tests against real Postgres, chaos harness with a negative control
PythonPostgresRedisFastAPIOpenTelemetry
Read the full write-up
Live demo ↗ for relaySource ↗ for relay
Public repo

quorum

Raft consensus written from scratch, behind a linearizable key-value store.

  • Raft implemented from scratch, with no consensus library underneath
  • The core is a pure function, so a whole cluster runs in one process
  • 147 tests in 25s, about 22,000 checked operations, 0 violations
PythongRPCDockerpytestmypy --strict
Read the full write-up
Live demo ↗ for quorumSource ↗ for quorum
Public repo

resume-tailor

Deterministic bullet matching that renders a tailored resume to PDF.

  • A fixed matching pass scores each bullet against the posting
  • No sampling anywhere, so the same input always yields the same PDF
  • 96 tests hold that property in place
Deterministic pipelinePDF rendering
Read the full write-up
Live demo ↗ for resume-tailorSource ↗ for resume-tailor

Background

Experience

Apr 2024 to May 2024

Data Analyst Intern

Exotic India · Delhi, India

  • Built an automated Excel-based ingestion and reporting workflow for order tracking, handling 10,000+ daily transactions.
  • Wrote transformation and segmentation logic splitting operational data across 5+ categories, replacing a manual daily compilation step for the fulfilment team.

Education

Expected May 2027

Master of Computer Applications

CHRIST (Deemed to be University) · Bengaluru

May 2025

BCA Computer Applications

CHRIST (Deemed to be University) · Delhi NCR

GPA 8.48 / 10

Also built.

Smaller projects, listed as they are.

  • realtime-dq-etl

    In progress

    A CDC-style ETL pipeline with a data-quality gate in front of the warehouse. The foundation is in place so far: source database and generator.

  • baggage-detection

    Repo ↗ for baggage-detection, opens on GitHub

    An X-ray image classifier that flags contraband in scanned baggage.

  • gaana_api

    Repo ↗ for gaana_api, opens on GitHub

    An unofficial JSON API over a music-streaming catalogue, for clients the official one does not serve.

  • gig-scanner

    Repo ↗ for gig-scanner, opens on GitHub

    A deployed FastAPI service that scans Reddit for freelance postings. Shared cloud IPs get rate-limited, so it falls back to a clearly labelled sample rather than failing quietly.

Want the long version?

Happy to talk through what was tried first, and where each project still falls short.

Email me