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TANISH_SARKAR
// HOOK

I Build ML Systems That Are
Boring To Maintain And
Interesting To Read.

AI/ML Intern @ PGAGI // Building production-style backend systems and AI-driven services -- REST APIs, relational/vector databases, and multi-agent LLM orchestration // Open to Backend & AI-GenAI Roles

SIM_WIDGET_V1
SYS_STATUS: ONLINE LATENCY: 12ms
> Initializing model inference environment...
> Loading tensors... OK.
CONFIDENCE: 98.4% MEM: 2.4GB / 16GB
01 // SYSTEM_OUTLOOK

01 // SYSTEM_OUTLOOK

Core Statement // 2026
"I am deeply obsessed with the gap between a machine learning model that scores 94% on an offline benchmark and one that actually survives production deployment. I don't build generic tutorial wrappers. I design clean pipelines, implement architectures from scratch to truly understand their boundaries, and build systems optimized for reliable execution over academic metric inflation."
02 // FIELD_DEPLOYMENT

02 // FIELD_DEPLOYMENT

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Work // Ongoing
Jul 2026 — Present

AI/ML Intern

@ PGAGI
  • -> Built and optimized a WhatsApp-based AI document processing pipeline processing 10K+ invoices/month with 98% extraction accuracy, reducing manual validation time by 65%.
  • -> Improved document-processing reliability by implementing media validation, PDF-to-image conversion, per-user batching, and file-size safeguards, supporting robust processing of image and multi-page PDF inputs.
  • -> Evaluated LLM/VLM performance across invoice, image, and multi-page PDF scenarios by measuring extraction accuracy, latency, token usage, and inference cost, informing model and pipeline optimization.
  • -> Contributed to backend, frontend, and production engineering through REST APIs, asynchronous processing, database migration planning, React functionality, testing, logging, and debugging, while researching Excel-to-Python business-logic conversion for product integration.
03 // SYSTEM_CAPABILITIES

03 // SYSTEM_CAPABILITIES

CORE MASTERY

Languages

Python, C++, JavaScript, SQL.

PRODUCTION-READY

Backend & APIs

FastAPI, Flask, REST APIs, Async Processing, Microservices, Git/GitHub, Testing & Debugging.

-> Shipped a 6-endpoint FastAPI microservice for vendor onboarding & compliance.
CORE MASTERY

Databases

PostgreSQL, MySQL, MongoDB, SQLAlchemy, Alembic, pgvector, FAISS.

-> Paired pgvector + FAISS for dense retrieval without LangChain abstractions.
CORE MASTERY

AI/GenAI & Agentic Systems

PyTorch, HuggingFace Transformers, Sentence-Transformers, RAG, Agentic AI, LangChain, LangGraph, LLM/VLM Integration.

-> Orchestrated a 4-stage multi-agent pipeline with human-in-the-loop checkpoints.
PRODUCTION-READY

ML/DL & Transformers

Scikit-learn, TensorFlow, CNNs, Transformers, Attention, Encoder-Decoder, BERT, GPT, ViT, Model Tuning.

-> Built a GPT-2 style transformer from first principles with a custom BPE tokenizer.
PRODUCTION-READY

Cloud & Tools

Google Cloud (GCS, Vertex AI), Docker, Streamlit, NumPy, Pandas, OpenCV, AWS Certified Cloud Practitioner.

-> Integrated WhatsApp + GCS + Vertex AI/Gemini for automated invoice extraction at PGAGI.
04 // PROJECTS

04 // PROJECTS

PRO_01
FASTAPI LLM_EXTRACTION COMPLIANCE_ENGINE

Vendor Onboarding & Compliance Microservice

Built a FastAPI microservice with 6 REST endpoints for document ingestion, LLM extraction, compliance validation, duplicate detection, pipeline orchestration, and audit-log retrieval. Combined Groq (Llama 3.3 70B), Sentence-Transformers, FAISS, and PostgreSQL with Alembic to automate structured extraction, rule-based compliance checks, semantic duplicate detection, and audit logging.

IMPACT:

Reduced manual processing time by 60%, automated compliance validation for 500+ vendors.

PRO_02
MULTI_AGENT HUMAN_LOOP ORCHESTRATION ASYNC

PodFlow — Multi-Agent Newsletter Pipeline

A 4-stage multi-agent pipeline orchestrating transcript extraction, insight generation, newsletter drafting, and email delivery, converting YouTube videos into reviewable newsletter drafts. Added 2 human-in-the-loop checkpoints for content review and send confirmation, reducing reliance on single-call LLM generation.

IMPACT:

Cuts newsletter creation from 2 hours to 15 minutes, enabling batch processing of 50+ videos/month.

PRO_03
PGVECTOR RERANKING RETRIEVAL_PIPELINE

Semantic Search Engine with Neural Reranking

An end-to-end semantic retrieval pipeline combining Sentence-Transformers with pgvector/PostgreSQL for dense vector search without relying on LangChain abstractions. Implemented a 2-stage retrieve-then-rerank architecture using bi-encoder retrieval and cross-encoder reranking, deployed as an interactive Streamlit application to improve search relevance.

IMPACT:

Achieves 98% search relevance vs. baseline 60%, sub-100ms latency at scale.

PRO_04
PYTORCH ATTENTION_FROM_SCRATCH MIXED_PRECISION

GPT-2 Style LLM — Built from First Principles

Implemented a complete GPT-2 style transformer in PyTorch from scratch, building BPE tokenization, multi-head self-attention, feed-forward layers, positional encodings, and layer normalization. Built pretraining and fine-tuning pipelines with gradient clipping, learning-rate scheduling, mixed-precision training, and checkpointing, then loaded pretrained GPT-2 weights to validate implementation correctness.

IMPACT:

Validated implementation by loading OpenAI weights, achieving 100% architecture parity with original.

Currently Building

PodFlow (Restructuring)

I am entirely restructuring PodFlow into an AI-powered knowledge workspace that turns heterogeneous resources into grounded, structured knowledge artifacts that users can review, edit, share, export, send, and store.

PRO_05 COMPUTER VISION

CV Optimization (CIFAR-10)

Highly optimized CNN focused on memory efficiency and parameter reduction via pruning techniques for edge deployment.

PRO_06 COMPUTER VISION

Real-time Facial Detection

Real-time facial detection pipeline optimized for low latency inference on live video streams.

PRO_07 DEEP LEARNING

Autoencoder from Scratch

Neural autoencoder built from the ground up exploring representation learning, latent space compression, and data reconstruction.

PRO_08 MACHINE LEARNING

Heart Disease Classification

End-to-end classification pipeline deployed as a robust predictive API endpoint.

05 // TECHNICAL_BLOGS
05 // Technical Blogs

Research Logs &
Architectural Deep Dives

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06 // SYSTEM_CONTROL
SYS_TERMINAL // INTERACTIVE_MODE
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