With over 15 million valid cards issued as of September 2025, PayPay Card continues to expand at a growth rate that surpasses industry standards. To sustain this rapid growth, it is critical to implement a scalable development environment that guarantees seamless user experience and consistent stability.
PayPay Card Developers Meetup is a tech event featuring engineers to share their experiences navigating the development processes and tackling complex technical challenges during this transformative period for PayPay Card.
We will share practical insights directly from our daily practice through real-world technical sessions and frontline engineer panel discussions. Key topics will include how we successfully balance rapid development speed with rigorous security and the strategies used to cultivate our distinct engineering culture.
At the end of the event, we will host a networking session where you can interact directly with our engineers, including the speakers. This is a valuable opportunity to hear the voices of our members and gain fresh perspectives and inspiration. We look forward to your participation.
January 31, 2026 (Sat) “PayPay Card Developers Meetup” Registration
Event Overview
Event Title: PayPay Card Developers Meetup
Date: January 31, 2026 (Sat) 13:00-15:00
Venue: PayPay Card Yotsuya Office (Comore Yotsuya 23F)
- Time
Content
- 13:00-13:10
Opening
- 13:10-13:30
LT1 (Japanese): Frontend Integration and Introduction of BFF
Wataru Tsukada
Engineering Manager, PayPay Card Corporation
In this session, I will introduce our efforts toward a major architectural overhaul, in which I integrated the previously separate frontends for PayPay mini app and web pages, and additionally introduced a BFF built with Kotlin.
- 13:30-13:50
LT2 (English): Bringing FEP Migration In-House
Sait Kareem
Engineering Manager, PayPay Card Corporation
In this session, I will introduce initiatives aimed at bringing the credit card infrastructure in-house (TBU).
- 13:50-14:05
Tech Culture Panel Discussion
- 14:15-15:00
Networking
- This is a free, offline event held in a hybrid Japanese/English format.
- Simultaneous interpretation audio will be provided via Zoom during the event. If you wish to use the interpretation service, please bring your own device (e.g., smartphone) capable of accessing Zoom and your own earphones.
- Reception is open from 12:30 PM to 1:00 PM. Please proceed to the reception desk on the 23rd floor of YOTSUYA TOWER within this time.
- Seating: Seating is limited. Please note that if the event is oversubscribed, participants will be selected by a lottery.
- Media Use: Content from this event, including photos/screen captures showing the venue atmosphere, may be featured later on our company blog or other media. All images will be published in a manner that ensures individual attendees cannot be identified. By participating, you acknowledge and agree to this.
- Privacy Policy: Any personal information collected during this event (including pre- and post-event surveys) will be handled strictly in accordance with our privacy policy. Participation implies confirmation and agreement to our policy.
Please check the event form below for details and registration.
January 31, 2026 (Sat) “PayPay Card Developers Meetup” Registration