Gurwinder Singh
Senior Software Engineer (SDE - III)
Bengaluru,Karnataka
Summary
Senior Software Engineer (SDE-3) builds 7+ Android and mobile payments features per release in high-scale fintech environments. Leads architecture and delivery for SDKs, activity modules, promotions, subscriptions, rewards, and third-party API integrations using kotlin, Java, and test-driven development. Improves reliability and performance through automated testing, code reviews, and system optimization, increasing test coverage by 5–10 points across consumer payment flows.
Overview
8
8
years of professional experience
Work History
Senior Software Engineer (SDE-3)
PayPal
Banglore
09.2022 - 08.2026
- Led development of scalable payment processing solutions, improving transaction efficiency across platforms.
- Implemented scalable software solutions for payment processing systems to elevate product capability and user experience.
- Led creation of activity module for new PayPal application (Oslo) from initial concept to deployment.
- Configured and implemented PayPal LLMs to automate processes and enhance Oslo development efficiency.
- Supervised creation of activity module for new PayPal application (Oslo) from initial concept.
- Configured and implemented PayPal LLMs for automated processes and Oslo development.
- Created proofs of concept for innovative new solutions.
- Constructed APIs enabling integration with various third-party services and applications.
- Managed On-Calls and Root cause analysis impacts to make higher availability and delivered best customer experience.
- Instituted automated testing frameworks and facilitated code reviews to strengthen reliability, maintainability, and engineering standards.
- Investigated system performance shortcomings and provided actionable recommendations for optimization using AI.
- Developed next generation integration platform for internal applications.
Senior Software Engineer - (MG02)
PayTM Payments Bank
Noida
01.2021 - 09.2022
- Streamlined P2P payments, money requests, recharge, bill payments, and beneficiary management processes within money transfer team using NPCI services per RBI guidelines, facilitating seamless transactions for millions of users daily.
- engineered payment collection and request system from the ground up for millions of users in India and abroad.
- Initiated automated IPO payments for subscription services and constructed module from inception, enabling daily use by millions of users across India and globally.
- Constructed UPI Lite and PayTM international payment module from scratch, increasing payment alternatives for users.
- Transformed PayTM into a leading fintech organization, providing extensive digital payment and financial services to consumers and merchants nationwide.
Software Engineer
Jugnoo
Chandigarh
04.2019 - 01.2021
- Engineered and established card pool and peer-to-peer car rental services from scratch leveraging kotlin, Rx-Java, Dagger 2, and MVVM.
- constructed plugins for wallet transfer live tracking and integrated payment gateways including PayTM, Stripe, PayPal
- developed integrated SaaS platform to facilitate online marketplace development
- developed integrated SaaS platform to support online marketplace development
Associate Software Engineer
Chicmic
Chandigarh
03.2018 - 04.2019
- Engineered snack tracker platform for convenient food delivery to customers' doorsteps in Australia. Integrated payment gateways like Stripe and PayPal for secure transactions.
- Developed advanced technology systems for funeral home and cremation services using Kotlin and Dagger 2 with biometric SDK for seamless service delivery.
- Positioned Chicmic as a leading company in India for web and mobile game and app development.
Education
Bachelor of Engineering - C.S.E
Guru Nanak Dev University
Amritsar, Punjab, India03-2018
Skills
Android development and SDK
Java and Kotlin programming
GraphQL
Mobile API design
System architecture
SDK development
Payment feature delivery
Application performance optimization
Third-party integration
Feature rollout planning
ACHIEVEMENTS
- Rising Star Performer (02/2026)
- Best Performer in PayPal Activity Module - Design System Architecture and Develop across the mobile platforms module in PayPal new application code from scratch.
- Rising Star Performer (06/2021)
- Star Performer in PayTM Payment bank - Android Money Transfer Team by R&R process of Software Industry - Best performer for quality delivery feature from scratch used by millions of user.
- Mediums Blogs
- Publish blog for developer's to learn and share experience of code optimisation and for design utilities for developer to reduce development time and space complexity.
Timeline
Senior Software Engineer (SDE-3)
PayPal
09.2022 - 08.2026
Senior Software Engineer - (MG02)
PayTM Payments Bank
01.2021 - 09.2022
Software Engineer
Jugnoo
04.2019 - 01.2021
Associate Software Engineer
Chicmic
03.2018 - 04.2019
Bachelor of Engineering - C.S.E
Guru Nanak Dev University