Open to opportunities

Deepak kumar

@deepakkumar57

I build scalable backend platforms and Android applications, from real-time data pipelines to secure mobile experiences.

India

Message

What I'm looking for

I'm looking to solve large-scale engineering challenges, build scalable production-ready systems, and mentor development teams through strong technical design and engineering practices.

I've built production software at Kradle Joy and ePayLater, spanning scalable backend services, Android applications, and real-time customer data platforms.

At Kradle Joy, I designed a Customer Data Platform from scratch using Spring Boot, Kafka, and Flink, scaling asynchronous real-time processing to thousands of records per second. I now lead a cross-functional team of frontend and backend engineers, owning system architecture and technical design for production-grade solutions.

At ePayLater, I improved mobile security to achieve VAPT approval and delivered biometric authentication, SIM/device binding, dark mode, and integrations with Paytm, Razorpay, Pine Perks, and AppsFlyer.

I've also led Android delivery at Relayapt, building customer, Wear OS, and admin dashboard modules from scratch. I enjoy solving large-scale engineering challenges and mentoring teams through code reviews, design discussions, and technical guidance.

Experience

Work history, roles, and key accomplishments

Current

Lead Software Engineer

Current

Kradle Joy Private Limited

Apr 2026 - Present (6 months)

Leading a cross-functional team of 5+ engineers, driving design, development, and delivery of scalable software solutions. Owning system architecture and technical design for production-grade backend services, mentoring engineers, and collaborating with stakeholders.