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Arifuzzamanjoy/README.md

Arifuzzaman Joy

I put LLM and AI-agent systems into production on serverless and rented GPUs, for a fraction of what managed APIs cost.

Upwork Top Rated · 100% Job Success

Upwork

Email · LinkedIn · Portfolio

Scholar · Hugging Face · ORCID


vLLM-Omni (7.1k stars)

My main open-source focus: keeping per-request state correct in vLLM-Omni’s multi-stage serving. Voice references, LoRA adapters and engine args should never leak across requests or stages. I find these silent failures by measuring, then turn them into benchmarks and CI checks.

  • Found #8235: CosyVoice3 returned 11.7 to 25% wrong voices at concurrency 8 (fixed in #8224).
  • Merged #8456: the benchmark now takes multiple reference voices, so mixed-voice batches can expose cross-request leaks.
  • CI check: #8555 adds a nightly cross-request voice check for voice-cloning TTS, built on #8456. The missing piece is verifying who is actually speaking, which my speaker-embedding verifier (cv3_verify) does.
  • Cited in the Q4 roadmap discussion as the basis for that nightly check.
  • Merged #6783: engine args leaked between pipeline stages. One-line fix, 145 lines of tests.

Also merged


What people hire me for

  • Serverless GPU endpoints on RunPod, Modal, Vast.ai
  • RAG pipelines with LLM-as-judge evals
  • Multi-agent systems and hot-swappable LoRA adapters
  • Rescuing deployments that almost work: OOM, driver mismatch, models that barely fit

Selected work

LatentMAS-SLoRA

Extends LatentMAS (Princeton, UIUC, Stanford; ICML 2026 Spotlight). Listed as community extension #5 in the official Gen-Verse repo.

Agents pass hidden states instead of text, with role LoRA adapters switched on one base model. In my GSM8K run (26 items): 83.7% fewer output tokens and 5.5x faster than the text-based pipeline, no significant accuracy difference. I also fixed a semantic router that was quietly deciding 199 of 200 routes: 51.3% to 96.2% accuracy on 450 labelled items. Limits are in the README: PEFT switching, not true S-LoRA, adapters not trained yet. Demo.

Vast.ai installer

Hardened setup with 28 documented host failure modes. Not merged, kept as reference.


Projects


Stack

GPU: RunPod, Modal, Vast.ai, vLLM, Docker, FSDP, 4-bit quantization

LLM: PyTorch, PEFT/LoRA, Unsloth, Axolotl, LangChain, MCP, RAG

Ops: Python, FastAPI, Bash, GitHub Actions, pytest, SQL


Research

B.Sc. EEE, University of Rajshahi. 5 papers, 77 citations, h-index 5 on solar cells and medical imaging, in Solar Energy, Heliyon (first author), Nano Select, Sustainable Energy Tech. & Assessments, and IJACSA. Full list

I'm most interested in health, energy, education, and scientific tooling.


Got a model that needs to go live?

Send the model, latency target, and budget. You'll get a straight answer, including when you don't need me.

Upwork

joy.apee@gmail.com

Pinned Loading

  1. latent_mas_slora latent_mas_slora Public

    Python 7

  2. Osmantic/ODS Osmantic/ODS Public

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    Python 458 129

  4. vllm-project/vllm-omni vllm-project/vllm-omni Public

    A framework for efficient model inference with omni-modality models

    Python 7.6k 2.1k

  5. neka-nat/freecad-mcp neka-nat/freecad-mcp Public

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