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Shashwat Singh

Senior Software Engineer at Paytm

New Delhi

3+ years of work experience

Paytm
Apr 20251 y 6 moPresent

On-site

- Built Paytm’s LLM-powered agentic platform from the ground up for customer-support live chat, serving 900K+ unique sessions daily with 98.7% end-to-end automated resolution, ~2-second time-to-first-token, and LLM agents orchestrated through configurable workflows. ● Developed production-grade AI infrastructure, building a unified multi-provider LLM inference platform with intelligent routing, streaming, fallback and usage management; onboarded 3 external clients. ● Owned the PI Decisioning Platform, Paytm's real-time payment risk infrastructure processing 9,000 TPS+ ; built and launched its core Gateway from the ground up, establishing the primary entry point for real-time risk decisioning, transaction processing and downstream risk-engine integrations. ● Built and scaled the centralized Tool Calling Platform powering tool integrations across Paytm's agentic ecosystem, processing 8.75M + requests daily at ~101 requests/second, with p90 latency under 1 second, enabling reliable, low-latency execution of agent actions at scale. ● Established production traffic replay and release validation infrastructure, replaying peak production traffic in performance environments to validate system performance and agent decision accuracy, enabling high-confidence releases with zero production rollbacks. ● Improved platform reliability and operational efficiency through end-to-end observability, SLO-based alerting, multi-tenant isolation and automated deployment practices; supported 150+ production releases and Tier-1 on-call operations.
Paytm
Jul 20231 y 8 moMar 2025

Noida

● Developed and scaled core transaction-processing infrastructure using Spring WebFlux, Redis and asynchronous processing, improving throughput, optimizing data enrichment and establishing a foundation for high-volume risk decisioning. ● Developed distributed streaming pipelines using Apache Flink and Kafka, enabling scalable event processing, stream-to-API integrations and 3× transaction-volume scaling. ● Enabled onboarding of 30+ lending partners by developing reusable integration workflows, parallel data enrichment and optimized payload processing, improving scalability across partner integrations. ● Improved platform observability and production reliability through centralized monitoring, SLA dashboards and proactive alerting, reducing incident response time by 50%.
Siemens
Jan 20226 moJul 2022

Bengaluru, Karnataka, India

Machine learning research intern

Shashwat’s AI Stack

claude code
claude code
cursor
cursor
mcp
mcp
openai
openai
claudecode
claudecode
ChatGPT
ChatGPT

Education

Bachelor of Technology - BTech, Computer Science

IIT Mandi

20194 yrs2023

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Headline

Senior Software Engineer at Paytm

About

Software Engineer @ Paytm | Ex-ML Intern @ Siemens | IIT Mandi CSE'23 I’m a Computer Science & Engineering graduate from IIT Mandi with a minor in Management. Passionate about building scalable backend systems and solving real-world problems through tech. At Paytm, I’ve worked on high-throughput distributed services, driving key feature rollouts and performance optimizations. Earlier, at Siemens, I explored applied machine learning and built RESTful APIs during my research internship. Always curious, I enjoy working at the intersection of clean code, smart design, and reliable systems.

Location

New Delhi

AI stack

claude code

cursor

mcp

openai

claudecode

ChatGPT

Work experience

Senior Software Engineer at Paytm, Apr 2025 - Present · 1 y 6 mo, On-site, - Built Paytm’s LLM-powered agentic platform from the ground up for customer-support live chat, serving 900K+ unique sessions daily with 98.7% end-to-end automated resolution, ~2-second time-to-first-token, and LLM agents orchestrated through configurable workflows. ● Developed production-grade AI infrastructure, building a unified multi-provider LLM inference platform with intelligent routing, streaming, fallback and usage management; onboarded 3 external clients. ● Owned the PI Decisioning Platform, Paytm's real-time payment risk infrastructure processing 9,000 TPS+ ; built and launched its core Gateway from the ground up, establishing the primary entry point for real-time risk decisioning, transaction processing and downstream risk-engine integrations. ● Built and scaled the centralized Tool Calling Platform powering tool integrations across Paytm's agentic ecosystem, processing 8.75M + requests daily at ~101 requests/second, with p90 latency under 1 second, enabling reliable, low-latency execution of agent actions at scale. ● Established production traffic replay and release validation infrastructure, replaying peak production traffic in performance environments to validate system performance and agent decision accuracy, enabling high-confidence releases with zero production rollbacks. ● Improved platform reliability and operational efficiency through end-to-end observability, SLO-based alerting, multi-tenant isolation and automated deployment practices; supported 150+ production releases and Tier-1 on-call operations.

Software Engineer at Paytm, Jul 2023 - Mar 2025 · 1 y 8 mo, Noida, ● Developed and scaled core transaction-processing infrastructure using Spring WebFlux, Redis and asynchronous processing, improving throughput, optimizing data enrichment and establishing a foundation for high-volume risk decisioning. ● Developed distributed streaming pipelines using Apache Flink and Kafka, enabling scalable event processing, stream-to-API integrations and 3× transaction-volume scaling. ● Enabled onboarding of 30+ lending partners by developing reusable integration workflows, parallel data enrichment and optimized payload processing, improving scalability across partner integrations. ● Improved platform observability and production reliability through centralized monitoring, SLA dashboards and proactive alerting, reducing incident response time by 50%.

Intern at Siemens, Jan 2022 - Jul 2022 · 6 mo, Bengaluru, Karnataka, India, Machine learning research intern

Education

Bachelor of Technology - BTech, Computer Science, IIT Mandi