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Vishal Sharma

SDE-1 · Backend & Distributed Systems · Cashfree Payments | GSoC ’25 OpenELIS | IIITN ’26

Bengaluru

2+ years of work experience

Cashfree Payments
Jun 20263 mosPresent

Led end-to-end development of a promotional offers platform in Java and Spring Boot, serving 500+ merchants processing ₹100Cr+ monthly GMV Built a fault-tolerant distributed subscription billing system in Java 17 with Redis locking and idempotency guarantees, processing 8,000+ recurring payments/day Migrated payment messaging infrastructure from Apache Kafka to Redis Streams, sustaining 5,000+ events/minute while reducing infrastructure cost by 30% Optimized high-traffic MySQL queries using composite indexing and JPA Criteria API, reducing database latency by 40%
Cashfree Payments
Jul 20251 yrJun 2026

Worked with the Flowwise Native team to develop a rule-based payment routing system that lets merchants configure custom logic based on factors like amount, transaction type, and gateway success rates
Google Summer of Code
Jun 20254 mosSep 2025

Washington, United States

Architected a Spring Boot backend module integrating Open Concept Lab REST APIs, automating 50+ healthcare lab parameter mappings across facilities in 5 countries Reduced manual clinician setup time by 60%, eliminating 120+ operational hours/month across healthcare workflows Built integration test suites using MockMvc for 15+ REST endpoints, preventing regressions and reducing API response payload by 35%
Stealth Startup
May 20254 mosAug 2025

Remote

Built workflow automation on HarmonyOS that reduced health insurance claim verification time by 30%, directly cutting 4hrs/claim Designed and deployed 5 automated verification pipelines, replacing manual steps in the claims processing workflow Shipped production automation handling 1k insurance claims, improving end-to-end processing efficiency by 30%
Open Network For Digital Commerce (ONDC)
Dec 20244 mosMar 2025

Delhi, India

Developed a concurrent GraphQL-to-REST adapter in Golang for Shopify integration using goroutines and channels, onboarding 1,500+ sellers with sub-100ms latency Designed and deployed containerized microservices across 6 services using Docker Compose, Go, and AWS EC2, achieving 99.5% uptime Built observability using Prometheus exporters tracking p50/p95/p99 API latency and seller funnel metrics, reducing downstream failures by 35%
Code for Good Tech (C4GT)
Jun 20244 mosSep 2024

Remote

Built secure REST APIs for digital identity verification handling 100k requests, with 99.9% uptime under production load Optimized database query performance by 40% for identity verification workflows, reducing lookup latency from 120ms to 70ms

Vishal’s AI Stack

codex
codex
claudecode
claudecode

Education

Indian institute of information technology Nagpur

Bachelor of Technology - BTech, Computer Science

Indian institute of information technology Nagpur

20224 yrs2026
RMVM : Raman Munjal Vidhya Mandir

RMVM : Raman Munjal Vidhya Mandir

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Headline

SDE-1 · Backend & Distributed Systems · Cashfree Payments | GSoC ’25 OpenELIS | IIITN ’26

About

Software Engineer at Cashfree building payment infrastructure and distributed backend systems. Previously worked on ONDC seller integrations, healthcare interoperability systems through GSoC 2025, and large-scale identity verification platforms. Interested in distributed systems, payment infrastructure, reliability engineering, and high-throughput backend platforms. Tech stack: Go, Java, Spring Boot, gRPC, Redis, Kafka, PostgreSQL, Docker, AWS.

Location

Bengaluru

AI stack

codex

claudecode

Work experience

Software Engineer at Cashfree Payments, Jun 2026 - Present · 3 mos, Led end-to-end development of a promotional offers platform in Java and Spring Boot, serving 500+ merchants processing ₹100Cr+ monthly GMV Built a fault-tolerant distributed subscription billing system in Java 17 with Redis locking and idempotency guarantees, processing 8,000+ recurring payments/day Migrated payment messaging infrastructure from Apache Kafka to Redis Streams, sustaining 5,000+ events/minute while reducing infrastructure cost by 30% Optimized high-traffic MySQL queries using composite indexing and JPA Criteria API, reducing database latency by 40%

Software Engineer Intern at Cashfree Payments, Jul 2025 - Jun 2026 · 1 yr, Worked with the Flowwise Native team to develop a rule-based payment routing system that lets merchants configure custom logic based on factors like amount, transaction type, and gateway success rates

GSoC Contributor @OpenElis at Google Summer of Code, Jun 2025 - Sep 2025 · 4 mos, Washington, United States, Architected a Spring Boot backend module integrating Open Concept Lab REST APIs, automating 50+ healthcare lab parameter mappings across facilities in 5 countries Reduced manual clinician setup time by 60%, eliminating 120+ operational hours/month across healthcare workflows Built integration test suites using MockMvc for 15+ REST endpoints, preventing regressions and reducing API response payload by 35%

Software Engineer Intern at Stealth Startup, May 2025 - Aug 2025 · 4 mos, Remote, Built workflow automation on HarmonyOS that reduced health insurance claim verification time by 30%, directly cutting 4hrs/claim Designed and deployed 5 automated verification pipelines, replacing manual steps in the claims processing workflow Shipped production automation handling 1k insurance claims, improving end-to-end processing efficiency by 30%

Software Developer Intern at Open Network For Digital Commerce (ONDC), Dec 2024 - Mar 2025 · 4 mos, Delhi, India, Developed a concurrent GraphQL-to-REST adapter in Golang for Shopify integration using goroutines and channels, onboarding 1,500+ sellers with sub-100ms latency Designed and deployed containerized microservices across 6 services using Docker Compose, Go, and AWS EC2, achieving 99.5% uptime Built observability using Prometheus exporters tracking p50/p95/p99 API latency and seller funnel metrics, reducing downstream failures by 35%

BackEnd Developer at Code for Good Tech (C4GT), Jun 2024 - Sep 2024 · 4 mos, Remote, Built secure REST APIs for digital identity verification handling 100k requests, with 99.9% uptime under production load Optimized database query performance by 40% for identity verification workflows, reducing lookup latency from 120ms to 70ms

Education

Bachelor of Technology - BTech, Computer Science, Indian institute of information technology Nagpur

RMVM : Raman Munjal Vidhya Mandir