viraj chandra

journey

work, study, contests.

work

google / software engineer ii

jul 2025 - present
  • started on home history for the google home app, then moved to monetization infrastructure, building shared infra that products like google health and payments run on.
  • architected an mcp-based agent wired to gemini that generates metadata and powers data discovery across 120+ internal tables. top-5 retrieval accuracy went from 31% to 93%.
  • led a backend migration of the query-parsing system behind a conversational assistant, fixing a signal loss that was causing 20% semantic drift and bringing it down to 2%.
  • designed a conditional iam authorization model to protect a data ingestion pipeline from unauthorized external writes.
  • built scheduling and ingest logic for premium subscription features on a consumer health platform. the placement became the second highest converting surface app-wide: 3,800+ conversions off 175k+ impressions.
  • set up automated end-to-end performance testing and alerting for a core platform service, so latency regressions get caught before production.
  • ran a 6-part company-wide ai workshop series teaching 50+ engineers to build and deploy their own agents.

tle eliminators / educator, product and operations

dec 2023 - present
  • lead product and operations.
  • teach competitive programming to a base of 10,000+ students, across codeforces, codechef and atcoder, including the tle prime cohort.
  • taken 200+ lectures and post-contest discussions.
  • wrote 200+ editorial solutions, covering the cp-31 sheet and the cses problem set.

google / swe intern, home wifi

may 2024 - aug 2024
  • worked on the internal tool that unpacks diagnostic reports from google wifi devices.
  • built the upload flow for diagnostic reports, handling files over 150 mb, fully unit tested.
  • built the viewer for report contents, whether freshly uploaded or already in the database.

education

national institute of technology, raipur

b.tech, information technology · 9.18/10

2021 - 2025

spring dale college, lucknow

cisce xii · 97.8% · icse x · 97.2%

2019 - 2021

ratings

  • codeforcesexpert, max 1740
  • codechef5 star, division 1, max 2028
  • leetcodeguardian, 2339, global rank 2.4k

contests and awards

  • icpc 2023 regionalist at the kanpur site. team rank 69 of the 100 teams that made it onsite.
  • icpc 2023 preliminaries, team rank 343 of 1500, out of 4500 teams that entered.
  • best contest finishes: codechef starters 66 div2 global rank 99, leetcode biweekly 101 global rank 467, codeforces edu round 149 div2 global rank 746.
  • 1500+ problems solved across platforms.
  • finalist at smart india hackathon 2023, 1000+ teams.
  • winner of vigyaan, aavartan 2023, the national tech exhibition at nit raipur.

positions held

convener, training and placement office · nit raipur

jul 2023 - 2025

overall coordinator, turing club of programmers · nit raipur

apr 2022 - 2025

lead, raaga music club · nit raipur