---
title: "Bishal Chakraborty - Software Engineer II - Monitoring & AI in Bengaluru | Tal"
description: "Meet Bishal Chakraborty, Software Engineer II @OakNorth | Ex Engineer - Offline Merchants, PhonePe | Ex SDE Backend - Codezin based in Bengaluru. AI stack includes anthropic apis, claude code, and claude. Explore public work links including leetcode."
image: "https://tal.club/meet/bishal-chakraborty-1/share-image"
---

# Bishal Chakraborty on Tal

## Headline

Software Engineer II @OakNorth \| Ex Engineer \- Offline Merchants, PhonePe \| Ex SDE Backend \- Codezin

## About

Software Engineer working across Backend Engineering, Data Platforms, Conversational AI, and AI\-Assisted Automation in fintech and banking ecosystems\. • Currently building scalable calculation engine and automating data ingestion pipeline at OakNorth Bank using FastAPI, AWS , Lambda, LangGraph, Aurora PostGres, GCP Pub/Sub, AWS S3, and event\-driven architectures powering borrower analytics and lending intelligence\. • Previously worked on IVR & Conversational AI systems at PhonePe, building scalable merchant\-support automation platforms using Spring Boot microservices, VXML, NLP integrations, and distributed workflows\. • Experienced in designing high\-performance backend systems, asynchronous pipelines, ETL workflows, OCR\-based extraction systems, workflow automation, and scalable APIs handling large\-scale operational workloads\.

## Location

Bengaluru

## AI stack

anthropic apis

claude code

claude

cursor

gemini

langgraph

## Work experience

Software Engineer II \- Monitoring & AI at OakNorth, Mar 2026 \- Present · 6 mos, London, England, United Kingdom, • Engineered an AI\-powered financial document analysis pipeline — LangGraph multi\-agent orchestration with 5 Claude\-based agents \(business unit extraction, CoA rule derivation, value mapping, rule refinement\), human\-in\-the\-loop review interrupts, crash\- recoverable async processing via SQS and PostgreSQL state checkpointing; built an MCP server using FastMCP exposing operations as tools for LLM clients with Langfuse LLM observability • Designed and shipped RESTful APIs for covenant formula management and alert monitoring — discriminated\-union AST persisted as PostgreSQL JSONB, multi\-layer Pydantic v2 validation \(field\-level regex, semantic date checks, partial\-update semantics\), soft\-delete with full audit trail • Engineered an AWS Lambda calculation engine evaluating 600\+ Chart of Accounts and covenant accounts across 38 months per borrower — per\-borrower commits preventing partial rollbacks, async delivery via SNS/SQS to downstream BigQuery powering Lightdash monitoring dashboards • Built idempotent breach and CIFD alerting Lambdas — SHA\-256 content\-based hashing for exactly\-once Slack notification delivery, per\-record commits preventing partial failures, self\-correcting hash cleanup on alert resolution • Traced and eliminated a silent data\-loss bug corrupting 100% of covenant formula saves in production — root cause: Pydantic v2 custom serializer silently stripping fields on every write; fixed at model layer with full regression test coverage

Software Engineer at PhonePe, Mar 2025 \- Mar 2026 · 1 yr 1 mo, Bengaluru, Karnataka, India, 𝙀𝙣𝙜𝙞𝙣𝙚𝙚𝙧𝙞𝙣𝙜 𝙘𝙤𝙣𝙫𝙚𝙧𝙨𝙖𝙩𝙞𝙤𝙣𝙖𝙡 𝘼𝙄 𝙖𝙣𝙙 𝙞𝙣𝙩𝙚𝙡𝙡𝙞𝙜𝙚𝙣𝙩 𝙄𝙑𝙍 𝙖𝙩 𝙋𝙝𝙤𝙣𝙚𝙋𝙚 Driving Conversational AI and backend voice automation at PhonePe, India’s leading payments platform with 600M\+ users, 40M\+ merchants, 330M\+ daily transactions, and ₹150L Cr\+ annual TPV\. Enabling Multilingual voice support, for 11 primary languages across the Indian territory based on demographics\. Integrate Python\-driven LLM pipelines for real\-time speech intent parsing and multilingual classification at scale\. Automate call tagging, dynamic routing, and fallback handling through backend rule engines for 40M\+ merchant queries\. Embed semantic understanding for edge\-case resolution across diverse voice inputs nationwide\. Deploy observability hooks & async workers ensuring sub\-second response cycles across 330M\+ daily transactions\. Stack: Java, Spring Boot, Python, LLMs, VXML, Redis, Elasticsearch, REST APIs, Webhooks

Software Developer and Engineer \- Backend at Codezin Technology Solutions Private Limited, Feb 2024 \- Mar 2025 · 1 yr 2 mos, Kolkata, West Bengal, India, Built and scaled a multi\-tenant SaaS powering all major Indian ports & airports, enabling 10M\+ containers & air cargo shipments annually\. Engineered real\-time validation pipelines processing 200K\+ JSON lines/minute, reducing customs clearance delays by 95%\. Designed and deployed OCR \+ ML models parsing 50K\+ invoices, manifests & shipping bills/day, cutting manual processing time from 3 hrs → 10 mins\. Developed secure REST APIs with JWT authentication, AES encryption, and automated billing, generating invoicing/year across clients\. Architected CRM \+ cargo tracking system handling 2M\+ live tracking events/day, with <150ms API latency at scale\. Implemented containerized microservices \(Docker \+ Django\) with 99\.99% uptime, supporting 100K\+ concurrent trade ops across ports\. Stack: Python, Django, REST APIs, PostgreSQL, Redis, OCR \(Tesseract\), ML Models, JWT, Docker, Webhooks

## Education

Bachelor of Technology \- BTech \(Hons\.\), Computer science and engineering, Hooghly Engineering and Technology College

Authpur National Model Higher Secondary School

## Public links

- leetcode: https://leetcode\.com/satyanweshium235

[View the original profile](https://tal.club/meet/bishal-chakraborty-1)

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