Headline

Backend Software Engineer | Java & Golang | Distributed Systems, Kafka, Microservices | Fintech | 3+ YOE | Open to SDE / MTS roles

About

I build backend systems for environments where downtime isn't an option — real-time trading infrastructure, high-volume order platforms, financial data pipelines. At Ratel Fintech (OptionX), I architected a multi-tenant SaaS subscription platform serving 10K+ active subscribers across two products, built an end-to-end Razorpay payment integration (orders, webhooks, signature verification), and engineered a FIX protocol order routing gateway (QuickFIX/J + Spring Boot) processing Market, Limit, and Stop orders across multiple exchanges. I also designed a WebSocket-based real-time market data system that cut unnecessary data broadcasts by 70%, and built a custom async EventBus delivering sub-millisecond updates to concurrent clients. Before that, at Jubilant FoodWorks (Domino's India), I built microservices powering the order lifecycle for 8M+ orders/month, and a Kafka-based real-time VIP customer identification system handling 5000+ events/sec at peak — cutting response latency by 25% and improving notification reliability by 30%. What I care about: — Distributed systems that scale — Event-driven architecture done right (Kafka / RabbitMQ) — APIs that hold up under real production load, not just in staging Stack: Java, Golang, Spring Boot, Kafka, RabbitMQ, Redis, PostgreSQL, WebSockets, AWS, Docker. Currently exploring SDE / MTS backend roles at product companies. Open to a conversation —dokwalkhushi@gmail.com

Location

Gurugram

AI stack

claude code

cursor

deepseek

github copilot

grok

opencode

Work experience

Software Engineer at OptionX, Sep 2025 - Apr 2026 · 8 mos, Gurugram, Haryana, India, • Architected a scalable multi-tenant subscription platform serving 10K+ active subscribers across 2 SaaS products, enabling upgrades, extensions, coupons, and free-trial enforcement via JWT-secured REST APIs — new products onboard with zero changes to core billing logic. • Implemented end-to-end Razorpay payment workflows (order creation, webhook handling, signature verification), eliminating manual billing overhead while ensuring full regulatory compliance. • Built a subscription lifecycle engine on PostgreSQL and Redis with cron-based expiry automation; automated GST-compliant invoice generation and scaled storage to 10K+ invoices on AWS S3. • Engineered a FIX protocol order routing gateway using QuickFIX/J and Spring Boot to process Market, Limit, and Stop orders across multiple exchanges, with execution-state normalization and real-time Drop Copy processing. • Designed a WebSocket-based real-time market data streaming system with per-client subscription routing, cutting unnecessary data broadcasts by 70% and improving network efficiency. • Built a non-blocking, event-driven architecture using a custom async EventBus with optimized serialization, achieving sub-millisecond data delivery to concurrent clients.

SDE at Jubilant FoodWorks Ltd., Jul 2023 - Aug 2025 · 2 yrs 2 mos, Noida, Uttar Pradesh, India, • Built and scaled microservices powering the order lifecycle for 8M+ orders/month across Domino's India operations. • Implemented an automated rider onboarding system using RabbitMQ event-driven architecture across 1800+ stores nationwide, reducing onboarding time by 35% and cutting data inconsistencies by 40%. • Built a real-time VIP customer identification system using Java multithreading and Kafka (partitioned topics, load-balanced consumers), handling 5000+ order events/sec at peak, improving notification reliability by 30% and cutting response latency by 25%. • Engineered message-driven retry mechanisms with database synchronization, achieving 99.9% data consistency between store-specific and centralized systems. • Built an automated SMS notification service integrated with store POS systems, and enhanced a React-based POS display, reducing checkout time by 20%.

SDE - intern at Jubilant FoodWorks Ltd., Jan 2023 - Jun 2023 · 6 mos, Gurugram, Haryana, India

Education

B-tech, Computer Science, Malaviya National Institute of Technology Jaipur