With over 69 million users as of May 2025, just seven years after launching in 2018, Fintech innovator PayPay is at the forefront of creating cutting-edge financial services alongside its group companies.
PayPay Developers Meetup is designed for engineers who are passionate about cutting-edge technology and curious to explore the insights of PayPay Product development.
We are aiming to provide you a deeper level of understanding of technical challenges at PayPay Group. Don’t miss the chance to network with our engineers, exchange ideas and explore your potentials at PayPay!
July 30, 2025 (Wed) “PayPay DEVELOPERS MEETUP in TOKYO” Registration
Event Overview
Event title：PayPay DEVELOPERS MEETUP in TOKYO
Date：July 30, 2025 (Wed) 19:00-21:00
Venue：PayPay Yotsuya Office (Comore Yotsuya 23F)
- Time
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Content
- 19:00-19:10
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Opening
- 19:10-19:35
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Supporting Evolution of Super FinTech App
Yuichi Futami
Senior Engineering Manager, PayPay Corporation
This session will delve into our journey of moving from mere speed to achieving both speed and quality in development. Discover how we strategically balance the delivery of new features with the crucial development of tech enablers that drive long-term innovation. We’ll also share our experience in building a truly collaborative culture that empowers our teams to achieve remarkable outcomes in a dynamic FinTech environment.
- 19:35-20:00
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PayPay’s Shift to an Internal Messaging System
Sameer Sathar
Engineering Manager, PayPay Corporation
This session will explore our journey to enhance PayPay’s P2P functionality. We’ll walk through the limitations of our prior architecture, detail the development of our innovative new chat and web socket system, and highlight how we achieved a seamless, zero-downtime migration. Discover the technical intricacies of our updated system and the significant benefits it brings to building highly reliable and scalable messaging platforms.
- 20:00-20:25
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The Hidden Pain of TCP Connection Management
Abhishek Jain
Tech Lead, PayPay Card Corporation
This session will provide essential insights into TCP basics, exploring how applications interact with this fundamental protocol and where common pain points arise. We’ll uncover the often-overlooked struggles of load balancing TCP services and discuss the aspects of TCP you can’t control but must effectively manage. Discover practical strategies for mitigating these connection management challenges and optimizing your systems.
- 20:25-21:00
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Networking
※This meetup will be conducted in English. It is an offline event which is free of charge.
- Registration: Check-in is open from 18:40 to 19:00 at the reception desk on the 23rd floor of YOTSUYA TOWER.
- Seating: Seating is limited. Please note that if the event is oversubscribed, participants will be selected by a lottery.
- Photography and Media: Please be aware that this event may be featured on the organizer’s blog or other media. Photos taken during the event may be used, but we will ensure that individuals are not personally identifiable.
- Privacy Policy: Personal information collected for this event will be handled in accordance with our privacy policy. Please review and agree to the policy on the application form before registering.
Please check the event form below for details and registration.
July 30, 2025 (Wed) “PayPay DEVELOPERS MEETUP in TOKYO” Registration