About

Arjun Verma

I've been writing code since I was twelve and still can't leave a system alone once I've seen inside it. These days it's mostly AI infrastructure, retrieval that actually retrieves and agents that finish the job. I once trained a 100M-parameter model on four billion tokens of Reddit Hinglish to see if it could text like my friends. It could, mostly. I build AI systems for a living, and take a few apart to see how they work.

I use Arch btw.

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Experience

Sep 2026 – presentSan Francisco, California (Remote)

Own Plutus, Atlan's AI for the finance team's month-end close. 1,000+ commits in 6 weeks, about 96% of the repo since I joined.
Gave the agent hands: it edits bank lines, schedules and close tasks as you, but only behind a card you approve, with undo.
Put a gate in front of the sandbox (concurrency caps, a waiting room, memory fences) so one heavy upload can't take prod down.

Jul 2026 – Sep 2026Remote

Built the software factory: a Linear ticket goes in, one tested, human-approved pull request comes out. 710 tests, ~47K lines of TypeScript.
The agent plans, a separate verifier re-runs the tests every round, and nothing can merge or touch main without a human.
Built the context system that hands developers the requirements and strips who they're for. A salted-hash leak gate catches what the model misses.

May 2026 – Jul 2026Bengaluru, India (Onsite)

Built Encube, which turns pharma SOPs into Duolingo-style lessons in 4 languages, on LangGraph, hybrid RAG and a Neo4j graph.
Kept working memory under 8K tokens with 3-stage context compression. LLM spend down 54%.
PDF parsing 150x faster with PyMuPDF, lesson generation 7x faster with async fan-out.

Feb 2026 – Apr 2026Bengaluru, India (Hybrid)

Rebuilt production RAG into a 5-stage pipeline. Answer quality 4.12 → 8.93, latency 12s → under 5s.
Picked the stack with data, not vibes: an LLM-as-judge harness, 33 experiments, 12 rerankers.
Fine-tuned Qwen 3.5 (27B) into a tutor that stays in character. Rubric score 48% → 87%.

May 2025 – Jan 2026Chennai, India (Onsite, then Remote)

Wired 50+ SliverC2 ops into an MCP layer to test whether an LLM can drive offensive-security tooling.
Fine-tuned open-weight models with SFT + DPO until they stopped refusing legit security questions. Refusals 88% → 14%.
Served them on one A100 at ~250 tokens/sec with vLLM and 4-bit AWQ. Only intern offered a remote extension.

Links

Letter of Recommendation

Attachments

CyStar Completion Certificate.pdfAttachment

Feb 2025 – Mar 2025Remote (Paid)

Made Express APIs serving 10K+ requests a day 40% faster, mostly by cutting query time 60% on the hot paths.
Shipped JWT auth and role-based access across 5,000+ accounts.

Dec 2024 – Jan 2025New Delhi, India (Onsite, AICTE HQ)

Built an offline-first message queue for Samvadini, the government's messenger. Failed deliveries down 85%.
Hunted down N+1 queries on the busiest routes. P95 latency down 47%.

Links

Samvadini Messenger

Extracurricular

First place at Smart India Hackathon 2025, out of 72,000+ participants, the largest hackathon in the country. We built Prashikshak, a national-scale testing platform for the NDMA.

Links

LinkedIn post

Photos · 5

First place at Hacktivate 2025, against 1,200+ teams.

Links

Certificate

Runner-up at the Level Super Minds Hackathon, out of 23,000+ participants.

Links

Certificate

Runner-up at Brain Battles 2024, a national hackathon.

Links

Certificate

Finalist at E-Summit 2025, a national hackathon.

Links

Certificate

Finalist at Code of Phoenix 2025, a national hackathon.

Links

Certificate

The highest grant the university awarded under its Capacity Building for Design and Entrepreneurship program, run by the E-Cell.

Links

Elsewhere

Experience

Sep 2026 – presentSan Francisco, California (Remote)

Own Plutus, Atlan's AI for the finance team's month-end close. 1,000+ commits in 6 weeks, about 96% of the repo since I joined.
Gave the agent hands: it edits bank lines, schedules and close tasks as you, but only behind a card you approve, with undo.
Put a gate in front of the sandbox (concurrency caps, a waiting room, memory fences) so one heavy upload can't take prod down.

Jul 2026 – Sep 2026Remote

Built the software factory: a Linear ticket goes in, one tested, human-approved pull request comes out. 710 tests, ~47K lines of TypeScript.
The agent plans, a separate verifier re-runs the tests every round, and nothing can merge or touch main without a human.
Built the context system that hands developers the requirements and strips who they're for. A salted-hash leak gate catches what the model misses.

May 2026 – Jul 2026Bengaluru, India (Onsite)

Built Encube, which turns pharma SOPs into Duolingo-style lessons in 4 languages, on LangGraph, hybrid RAG and a Neo4j graph.
Kept working memory under 8K tokens with 3-stage context compression. LLM spend down 54%.
PDF parsing 150x faster with PyMuPDF, lesson generation 7x faster with async fan-out.

Feb 2026 – Apr 2026Bengaluru, India (Hybrid)

Rebuilt production RAG into a 5-stage pipeline. Answer quality 4.12 → 8.93, latency 12s → under 5s.
Picked the stack with data, not vibes: an LLM-as-judge harness, 33 experiments, 12 rerankers.
Fine-tuned Qwen 3.5 (27B) into a tutor that stays in character. Rubric score 48% → 87%.

May 2025 – Jan 2026Chennai, India (Onsite, then Remote)

Wired 50+ SliverC2 ops into an MCP layer to test whether an LLM can drive offensive-security tooling.
Fine-tuned open-weight models with SFT + DPO until they stopped refusing legit security questions. Refusals 88% → 14%.
Served them on one A100 at ~250 tokens/sec with vLLM and 4-bit AWQ. Only intern offered a remote extension.

Links

Letter of Recommendation

Attachments

CyStar Completion Certificate.pdfAttachment

Feb 2025 – Mar 2025Remote (Paid)

Made Express APIs serving 10K+ requests a day 40% faster, mostly by cutting query time 60% on the hot paths.
Shipped JWT auth and role-based access across 5,000+ accounts.

Dec 2024 – Jan 2025New Delhi, India (Onsite, AICTE HQ)

Built an offline-first message queue for Samvadini, the government's messenger. Failed deliveries down 85%.
Hunted down N+1 queries on the busiest routes. P95 latency down 47%.

Links

Samvadini Messenger

Extracurricular

First place at Smart India Hackathon 2025, out of 72,000+ participants, the largest hackathon in the country. We built Prashikshak, a national-scale testing platform for the NDMA.

Links

LinkedIn post

Photos · 5