---
title: "Subhayu Kumar Bala - Data Engineer in Greater Bengaluru Area | Tal"
description: "Meet Subhayu Kumar Bala, Data Engineer @ Loop AI based in Greater Bengaluru Area. AI stack includes claude code, codex, and mcp. Explore public work links including github, medium, and subhayu.in."
image: "https://tal.club/meet/subhayu-kumar-bala/share-image"
---

# Subhayu Kumar Bala on Tal

## Headline

Data Engineer @ Loop AI

## About

Data and infrastructure engineer specializing in high\-performance data systems and production AI/LLM pipelines\. Currently at Loop AI, previously shipped solutions for 10\+ enterprise clients at FiftyFive Technologies, including Johnson & Johnson, Advent International \(SBGC Group\), and a McKinsey partner firm\. My work sits at the intersection of traditional data engineering and modern AI\. I've replaced a 27\.5\-hour SQL process with a 5\-second DuckDB/Pandas engine on 80M\+ records, built agentic LLM systems fine\-tuned on H100 clusters with >95% accuracy, and architected the data platform behind a startup's $6M Series A\. I also write open\-source developer tools: 6 Python packages on PyPI with 43,000\+ downloads\. Published researcher in IET Quantum Communication \(quantum computing simulation\)\. Python \| SQL \| Databricks \| BigQuery \| DuckDB \| Airflow \| Kafka \| OpenAI \| LangChain \| AWS \| Azure \| GCP \| Docker \| K8s \| Terraform

## Location

Greater Bengaluru Area

## AI stack

claude code

codex

mcp

Agno

Browser Use

Wispr Flow

## Work experience

Data Engineer at Loop AI, Jan 2026 \- Present · 9 mos, Bengaluru, Karnataka, India, Platform engineer on Loop's core data team, owning ingestion, onboarding, and observability for the food\-delivery analytics platform serving major restaurant chains\. Key Contributions: • Built Loop Pulse, a full\-stack internal observability platform \(38 views, 27 API modules\) used daily by 6\+ stakeholders for ingestion monitoring, SLA tracking, and incident triage across delivery providers\. • Bootstrapped TruROI Ops, a plan\-generation platform for the finance team \(90 PRs in 45 days\)\. Replaced a CDC pipeline with direct Postgres reads, cutting data lag from 13\.7 hours to near\-zero and query costs by 16x\. • Owned numerous production incidents with explicit root causes, including a $14k BigQuery cost runaway response and authored cross\-repo cost\-safety policy, coordinating recovery campaigns and resolving provider\-level failures across multiple 3P platforms\. • Optimized BigQuery query path from 342 GB to under 6 GB via partition pruning and incremental dbt modeling, cutting scan costs by 57x\.

Data Engineer at FiftyFive Technologies, Jun 2022 \- Jan 2026 · 3 yrs 8 mos, Delivered end\-to\-end data and AI solutions for 10\+ enterprise clients across healthcare, finance, logistics, and tech\. Conducted 100\+ technical interviews, led client scoping calls, and mentored teammates\. Key engagements: • SBGC Group \(Retail Data Platform\): Owned a multi\-region Azure/Databricks platform integrating SAP, Shopify, Klaviyo, and GA4\. Unblocked Advent International due diligence by reverse\-engineering Shopify's revenue logic to cut variance from \~10% to <0\.22%\. Root\-caused a data explosion bug, slashing volume by 99%\. • CV Advisors \(Performance Engineering\): Replaced a 1900\-line SQL stored procedure with vectorized DuckDB/Pandas logic, reducing runtime from 27\.5 hours to under 5 seconds on 80M\+ records across 150 clients\. • QxLab \(LLM Infrastructure\): Led a 4\-person team fine\-tuning Llama/Mistral on H100 clusters to >95% accuracy in a production agentic system\. Architected a TB\-scale dedup pipeline \(MinHash LSH \+ FAISS\), later open\-sourced as DatasetPipeline \(9\.7k\+ downloads\)\. • AGY Logistics \(IoT & Automation\): Sole architect of a GDP\-compliant cold chain system on GCP\. Automated workflows previously requiring 10\-15 US\-based ops staff\. Reduced false positive alerts by 70%\. • Johnson & Johnson \(Healthcare CDP\): Architected Treasure Data pipelines for regulated APAC markets \(JP/ANZ\)\. Built a 12\-scenario SQL truth table for hierarchical consent resolution, ensuring GDPR/PII compliance\. • LoopKitchen \(Data Ingestion\): Built core data architecture on GCP \(BigQuery, FastAPI\) enabling a $6M Series A\. Migrated legacy scrapers to official API integrations for UberEats, DoorDash, and Grubhub\. • Prospexs \(GenAI Platform\): Built an AI outreach platform backed by a 700M\+ contact database with a 4\-entity personalization engine \(OpenAI/Perplexity\), improving response rates by 45%\.

Software Engineer Intern at FiftyFive Technologies, Jan 2022 \- May 2022 · 5 mos, Gained experience with production infrastructure, backend best practices, and client\-facing delivery\. Engagements: • Eningo: Developed a cloud\-based geospatial platform for cable network automation\. Migrated legacy data from Postgres to MongoDB for enhanced scalability\. • NIBE: Managed and established Azure DevOps CI/CD pipelines for critical services supporting 50,000\+ daily users\.

## Education

Bachelor of Technology \- BTech, Information Technology, Calcutta Institute of Engineering and Management

Higher Secondary, Science, Amrita Vidyalayam, Durgapur

## Public links

- github: https://github\.com/subhayu99
- medium: https://medium\.com/@balasubhayu99
- subhayu\.in: https://subhayu\.in/

[View the original profile](https://tal.club/meet/subhayu-kumar-bala)

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