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Keyul Jain

@keyuljain

India

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What I'm looking for

Backend ownership roles

Software Development Engineer with 3+ years of experience building scalable backend systems and high-throughput fintech microservices using Java and Spring Boot. Currently working at BillDesk, delivering payment platforms supporting UPI, RuPay, cards, netbanking, and cross-border transactions for 200+ merchants. Strong experience in event-driven architectures using Kafka, Consul, and Aerospike, with hands-on ownership of API design, security, and production readiness. Led award-winning initiatives including an internal API Playground and scalable DCC workflows for multi-currency payments Comfortable operating across system design, performance optimization, and DevOps using Docker, AWS, Jenkins, and GitLab. Key Skills: Java | Spring Boot | Spring Security | REST APIs | Kafka | Aerospike | Consul | Docker | Kubernetes | Jenkins | GitLab | Microservices | API Development | UPI | PCI/RBI Compliance | AWS | AI Integration | Claude/OpenAI | MCP | Github Copilot | Hibernate

Experience

Work history, roles, and key accomplishments

Current

Software Development Engineer

Current

BillDesk (IndiaIdeas.com Ltd.)

Jul 2023 - Present (3 years)

Owned end-to-end design and delivery of high-throughput fintech backend microservices, reducing API latency by 8%+ and supporting payment workflows for 200+ merchants. Built Spring Boot/AWS API Playground and event-driven payment workflows with Kafka, delivered secure REST APIs using Spring Security/JWT/RBAC, and improved release workflows by reducing deployment cycles by 40% while also architecti

Spring Boot AWS Java Microservices Distributed Systems API Design Event Driven Architecture Kafka REST APIs Spring Security JWT RBAC Jenkins CI CD Release Engineering Observability Model Context Protocol (MCP)

Software Development Engineer

BillDesk

Jul 2023 - Jul 2026 (3 years)

Built and owned high-throughput fintech microservices supporting 200+ merchants (Google, Amazon, Netflix, Apple, IRCTC), reducing API latency by 8%+. Developed API Playground, Kafka-based payment workflows, secure Spring Boot REST APIs, CI/CD pipelines, and an MCP Server enabling natural language transaction operations, improving reliability and developer productivity.