WeAreDevelopers Logo WeAreDevelopers
Sign in
For You LIVE
Coffee With Developers • Feb 2, 2026

API‑First: How Twilio Designs for Developers - Justin Kitagawa (Twilio)

Justin Kitagawa

Justin Kitagawa asserts that trust is your true API product. Abandon the disconnected feature factory mindset. Learn how Twilio engineers composable, backward-compatible building blocks for five-nines availability.

Pause
Mute Enter Fullscreen
#1 about 2 min

Twilio's core mission and responsibilities

An overview of the communication platform and the systems managed behind console and API endpoints.

#2 about 2 min

Maintaining high availability for critical infrastructure

Why focusing on operational excellence is necessary to achieve extreme availability metrics.

#3 about 1 min

Onboarding users through the developer console

How the console acts as the entry point for provisioning API keys and programmatic access.

#4 about 4 min

Prioritizing backward compatibility in API design

The importance of supporting existing endpoints to ensure mission-critical systems and hardware integrations do not break.

#5 about 4 min

Designing composable APIs as platform building blocks

How decomposing complex actions into reusable primitives allows customers to build custom communication workflows.

#6 about 5 min

Prioritizing impact over raw feature development

Why product teams should investigate the root intent of customer requests rather than purely becoming a feature factory.

#7 about 3 min

Overcoming organizational silos to effectively unite platforms

How aligning different channels and acquisitions prevents the product structure from suffering under Conway's Law.

#8 about 3 min

Modernizing customer support with AI and multi-channel handoffs

How combining traditional telephone technology with asynchronous chat and AI creates seamless user experiences.

#9 about 8 min

Engineering practices for extreme platform reliability

Adopting an operational mindset through cross-team alignment, incremental deployments, and cellular architecture to isolate hardware failures.

#10 about 5 min

Synchronizing documentation and SDKs declaratively

Using OpenAPI specifications to automatically generate consistent helper libraries and reference code across programming languages.

#11 about 3 min

Scaling the developer console for enterprise structure

Transitioning a platform interface to support complex organizational access controls and sub-organization management.

#12 about 3 min

Maintaining simplicity while serving enterprise complexity

Preserving the quick time-to-value for individual developers even when building advanced enterprise features.

#13 about 4 min

Treating developer documentation as a primary product

Why high-quality, self-service documentation is critical for preventing support tickets and teaching AI models.

#14 about 4 min

Securing AI agents through scoped authorization

Addressing security challenges by utilizing playgrounds and restricted permissions to safely run language models.

#15 about 4 min

Establishing trusted communications against AI spoofing

Proving brand ownership over phone numbers to combat voice cloning and fraudulent telecommunication activities.

#16 about 3 min

Opportunities for utilizing telecommunication APIs

Encouraging developers to explore communication workflows and share feedback on improving the developer experience.

#17 about 4 min

Surviving sudden scale events and malicious traffic

Lessons learned from massive traffic spikes and protecting infrastructure using cloud partner rulesets to block bad actors.

Matching moments

1:40 min

Summarizing key engineering lessons for platform API development

Anto Anto · World Congress 2024

1:59 min

Designing governed and AI-native API platforms

Gbadebo Bello Gbadebo Bello · Europe 2026 Virtual

4:42 min

Practical guidance for developing trustworthy AI applications

Christoph Bräunlein Christoph Bräunlein +3 · World Congress 2025

3:32 min

Designing outstanding APIs with simplicity, safety, and evolvability

Anto Anto · World Congress 2024

3:26 min

Designing APIs for security from day one

Philippe De Ryck · LIVE

3:20 min

Architecting the platform with modern cloud and mobile technologies

Tom George · LIVE

More from Coffee With Developers

Using Agents to Curate the Content You See Online - Dan Gish thumbnail
12:47
about 1 month ago

Using Agents to Curate the Content You See Online - Dan Gish

Dan Gish

AI Vector Search at Scale - Ewa Szyszka - Ewa Szyszka thumbnail
11:14
about 1 month ago

AI Vector Search at Scale - Ewa Szyszka - Ewa Szyszka

Ewa Szyszka

What is Cross-Origin Storage - Thomas Steiner thumbnail
34:51
about 1 month ago

What is Cross-Origin Storage - Thomas Steiner

Thomas Steiner

Women in AI - Nalini Garg thumbnail
42:19
about 1 month ago

Women in AI - Nalini Garg

Nalini Garg

Agents and People Dynamics in Shared Chats - Sam Liu thumbnail
37:41
about 2 months ago

Agents and People Dynamics in Shared Chats - Sam Liu

Sam Liu

Why Token Reduction Isn’t Cost Reduction - Dave Anderson & Sarel Weinberger, PhD. thumbnail
41:09
about 2 months ago

Why Token Reduction Isn’t Cost Reduction - Dave Anderson & Sarel Weinberger, PhD.

Dave Anderson, Sarel Weinberger, Phd

Upcoming sessions on this topic

Open session

AI Is the Easy Part: Why Faster Engineers Don't Make Faster Businesses

  • Bharat Sharma

    Booking

    Senior Engineering Manager

Open session

Beware of Strangers Bearing Code: Open Source Trust in the Agent Era

  • Vikram Vaswani

    Consultant

Open session

How We Cut Our API's p99 Latency from Minutes to Under a Second

  • Deepak Agrawal

    Atlassian

    Principal Software Engineer

Open session

Multi-Cloud Isn't a Project. It's a Side Effect.

  • Antonio Mendoza Pérez

    Temporal Technologies

    Staff Developer Success Engineer

  • Gaurav Thadani

    Temporal

    Staff Developer Success Engineer

Open session

Teaching AI Coding Agents to Build It Right the First Time

  • Sajeetharan Sinnathurai

    Microsoft

    Principal Product Manager

Open session

How is SWE & EM roles are changing in the age of AI

  • Amol Sharma

    Stripe

    Engineering Manager

Related videos

20 billion requests a week: Upgrading Twilio's API gateway at scale thumbnail
22:08
World Congress 2026 Europe • 3 months ago

20 billion requests a week: Upgrading Twilio's API gateway at scale

Ainhoa Arruabarrena Ortiz, Mario Román Dono, Marius Obert

Teaching APIs Beyond the Docs - Alex Goldman thumbnail
22:02
Coffee With Developers • 4 months ago

Teaching APIs Beyond the Docs - Alex Goldman

Alex Goldman

Lessons from Our API Past: Evolving to a Resilient API Future thumbnail
29:30
World Congress 2025 • about 1 year ago

Lessons from Our API Past: Evolving to a Resilient API Future

Yousaf Nabi

Lessons learned from observing a billion API requests thumbnail
23:47
World Congress 2025 • about 1 year ago

Lessons learned from observing a billion API requests

Pratim Bhosale

Designing APIs That Survive AI Agents at Scale thumbnail
30:39
World Congress 2026 North America • 18 days ago

Designing APIs That Survive AI Agents at Scale

Phani Pendurthi

Throwing off the burdens of scale in engineering thumbnail
32:00
World Congress 2023 • about 3 years ago

Throwing off the burdens of scale in engineering

David Singleton, Thomas Pamminger

Related articles

From learning to earning

Jobs that call for the skills explored in this talk.