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TokyoDev Talks Vol. 10: Hard Lessons in Abstraction / Short-Lived Certificates

2026-03-04(水)18:30 - 20:45 JST

Tokyo Innovation Base

東京都千代田区丸の内3-8-3

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申込締切 3月4日 20:45
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詳細

Join us for TokyoDev Talks, where we have presentations that cut across the stack from engineers working at some of the most interesting tech companies in Japan.

Note that attendance for this event is limited to software developers, those aspiring to become one, or working in an adjacent position (e.g. Product Managers, UI/UX Designers, Security Engineers, QA Engineers, etc). If you're unsure whether you're qualified to attend, please get in touch.

This event is being held at Tokyo Innovation Base (TiB). When attending it, you'll also need to complete the free registration process with TiB if you have not already done so. You are strongly encouraged to complete this in advance, as otherwise you'll need to complete it on site before you're allowed into the venue.

Agenda

18:30 〜 19:00 Doors open

Enjoy talking with the other participants before the presentations begin. Drinks and a light meal will be provided by TokyoDev.

19:00 〜 19:05 Opening - Paul McMahon

We'll kick things off by welcoming everyone and giving a short introduction of the event.

19:05 〜 19:30 ​Hard Lessons in Abstraction: What I Learned Wrapping Map SDKs — Masashi Katsumata

When I started building a unified abstraction over multiple map SDKs, I assumed the main challenge would be implementation.
That assumption was wrong.

This talk focuses on the engineering challenges of abstraction fundamentally different systems behind a single interface.

I'll share concrete mistakes and trade-offs, including why "just wrapping the API" failed,
how conceptual differences caused unexpected behavior, and how performance constraints forced architectural redesigns.

Drawing from both my own experience and a previous open-source project with a similar goal,
I'll discuss what worked, what didn't, and the lessons that apply for beyond map SDKs.

Masashi Katsumata (Freelance Software Engineer)

Masashi is the author of three books about the Google Maps API, creator of the Google Maps plugin for Cordova, and has experience working as a software engineer in both Japan and the US.

19:40 〜 20:05 Long Live Short-Lived Certificates! Updates on Public Key Infrastructure — Alexis Hancock

Certificates are used in TLS (the protocol behind HTTPS) to authenticate servers and enable encrypted communication between clients (such as browsers) and servers. Recent changes have reduced maximum certificate lifetimes from 90 to 45 days and introduced short-lived certificates valid for as little as 160 hours. This presentation explores these changes and why they came about.

Alexis Hancock (Director of Engineering at Electronic Frontier Foundation)

Alexis works to keep the networks strong and encrypted by managing the Certbot project. As well as ensuring external EFF tools for the public are well supported. She researches an intersection of issues on digital rights, encryption, and consumer technology. She believes in an open and equitable web through encouraging expansion of security by default, bridging engineers and security research, and advocating for better and stronger tech policy and standards.

20:05 〜 20:45 Open Networking

Discuss the presentation or anything else with the other attendees.

Want to speak at a future event?

We're looking for speakers. You can find more details and submit a proposal here.

About TokyoDev

TokyoDev's job board is filled with software developer positions at Japanese companies whose engineering team’s primary language is English. From the big companies you’ve already heard of, to smaller up-and-coming startups, our positions offer you the chance to live in Japan but work in an international environment.

Code of Conduct

All attendees, speakers, sponsors and volunteers at our event are required to agree with the following code of conduct. Organisers will enforce this code throughout the event. We expect cooperation from all participants to help ensure a safe environment for everybody.

TokyoDev is dedicated to providing a harassment-free experience for everyone, regardless of gender, gender identity and expression, age, sexual orientation, disability, physical appearance, body size, race, ethnicity, religion (or lack thereof), or technology choices.

We do not tolerate harassment of event participants in any form. Sexual language and imagery is not appropriate for any venue, including at the event itself and other online media.

Participants violating these rules may be sanctioned or expelled from the event at the discretion of the organisers.

If you are being harassed, notice that someone else is being harassed, or have any other concerns, please contact a organizer immediately. Alternatively, you may contact us via our contact page.

コミュニティについて

TokyoDev

TokyoDev

Get-togethers for developers interested starting and growing a career in Japan. Organized by TokyoDev.

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