---
title: "Kalash Singh Jadoun - Software Engineer in Bengaluru | Tal"
description: "Meet Kalash Singh Jadoun, Software Engineer @ Cognam | Java · Spring Boot · Microservices · Kafka · Redis · AWS | Building cross-border payment infrastructure | Production RAG & LLM integration | Open to SDE roles based in Bengaluru. AI stack includes claude and codex."
image: "https://tal.club/meet/kalash-singh-jadoun/share-image"
---

# Kalash Singh Jadoun on Tal

## Headline

Software Engineer @ Cognam \| Java · Spring Boot · Microservices · Kafka · Redis · AWS \| Building cross\-border payment infrastructure \| Production RAG & LLM integration \| Open to SDE roles

## About

I build the backend of money movement — Java and Spring Boot services that move cross\-border payments without dropping a transaction\. For the last two years I've worked on the core of a regulated fintech platform: Spring Boot microservices and REST APIs behind a cross\-border remittance product, with a React/TypeScript admin layer on top\. The work is the unglamorous kind that matters — idempotency, audit trails, maker\-checker approvals, rate limiting, and query plans\. A few things I've shipped: → Investigated and killed a live DDoS attack draining OTP credits, deploying Redis\-based distributed rate limiting at the API gateway with zero downtime\. → Cut p95 latency on core ledger endpoints from \~800ms to \~180ms with composite indexing and query rewrites, holding through peak load\. → Replaced a 20\-day manual partner\-onboarding process with a self\-service Spring Boot pipeline \(AWS S3, Lambda, PostgreSQL\) that provisions API configs and cryptographic credentials in under 2 hours\. → Built a production Retrieval Augmented Generation pipeline with Spring AI and a vector store that cut support escalations \~80%, grounded on live campaign data and built under Responsible AI principles\. → Decomposed a monolith into a Kafka\-backed event\-driven microservice so teams could own their own transactional alerts\. Stack I reach for: Java 21, Spring Boot, Spring Security, Spring Data JPA, Spring AI, Apache Kafka, Redis, PostgreSQL, MySQL, REST API design, microservices, AWS \(EC2, S3, Lambda, CloudWatch\), Docker, Jenkins, CI/CD, JUnit 5, Mockito, React\.js, Next\.js, TypeScript\. Outside work I build systems to learn how they break — a real\-time stock portfolio engine on Kafka and Redis, and an offline UPI settlement protocol over Bluetooth mesh with exactly\-once guarantees\. I'm looking for a backend or full\-stack role where correctness under load actually matters — payments, infrastructure, or developer platforms\. Open to Delhi NCR, Bengaluru, Hyderabad, Pune and remote\. Reach me at kalashsj06@gmail\.com\.

## Location

Bengaluru

## AI stack

claude

codex

## Work experience

Software Engineer at Cognam Technologies Pvt\. Ltd\., Jul 2024 \- Present · 2 yrs 3 mos, 1\. Sole engineer who designed and shipped a full RAG pipeline on Oracle 23ai native vector search — ingestion via Spring AI EmbeddingClient, HNSW cosine index for sub\-100ms retrieval, streamed to React via SSE\. Cut analyst escalations \~80%\. 2\. Diagnosed and neutralised a live DDoS attack draining OTP credits in real time; deployed Redis token\-bucket rate limiting at API Gateway layer with zero service interruption\. 3\. Replaced a 20\-day manual partner onboarding process with a self\-service pipeline \(AWS S3, credential provisioning\) — reduced cycle time by 99%\+ to under 2 hours\. 4\. Applied vertical partitioning, composite indexing, and query rewrites to transaction\-heavy REST endpoints — p95 latency dropped from \~800ms to \~180ms; peak DB CPU down \~40%\. 5\. Built a Maker\-Checker governance engine across 4 entity types with full audit trails, satisfying compliance review requirements\.

Software Developer Internship at Cognam Technologies Pvt\. Ltd\., Jan 2024 \- Jul 2024 · 7 mos, Dwarka, Delhi, India, Decomposed a monolithic notification system into a Kafka\-backed microservice — decoupled producers from consumers, enabling non\-engineering teams to self\-serve campaign configuration without engineering involvement\. Contributed to migrating a legacy Struts admin portal to Spring Boot microservices \+ React; containerised services with Docker and set up CI/CD pipelines for independent per\-service deployments\.

## Education

Bachelor of Technology \- BTech, Computer Science, Indian Institute of Information Technology Vadodara

[View the original profile](https://tal.club/meet/kalash-singh-jadoun)

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