David SasakiDS
Looking for a job

David Sasaki

@davidsasaki

Senior Software Engineer with 12 years. Startup-ready. 70% frontend, 30% backend.

United States

After cutting my teeth at Google early in my career, I've spent the last decade building tools that empower creators – first at Webflow, then nearly 5 years at Figma during its explosive growth phase. My sweet spot is frontend (React, TypeScript, Next.js, modern JS frameworks), but I'm equally comfortable diving into Node.js backends when needed.

At Figma, I worked on the collaborative editing system that became our major competitive advantage. We faced fascinating technical challenges around real-time updates and conflict resolution that taught me how seemingly small UX details can make or break a product.

I'm particularly proud of optimizing our Canvas rendering performance, taking load times down by 30% while handling increasingly complex designs. This required deep diving into browser internals and rethinking our component architecture.

My time at early-stage Webflow taught me to wear multiple hats and ship quickly without sacrificing quality. Now at Deep Market Making, I've been applying these lessons building high-performance financial interfaces where milliseconds matter.

I thrive in startup environments where I can have outsized impact and ownership. Looking for a team with challenging technical problems, strong product vision, and collaborative culture. Ideal role would let me architect frontend systems while mentoring junior devs and having input on product direction.

Experience

Work history, roles, and key accomplishments

Deep Market Making logoDM
Current

Senior Software Engineer

Deep Market Making

Sep 2022 - Present (2 years 8 months)

Architected real-time trading dashboard with React, TypeScript and WebSockets. Implemented high-performance data visualizations with sub-100ms latency. Optimized backend APIs, reducing response times by 40%. Increased test coverage to 90%.

Figma logoFI

Senior Full-Stack Engineer

Nov 2017 - Sep 2022 (4 years 10 months)

Spearheaded collaborative editing features using WebSockets and Canvas API. Built real-time infrastructure supporting 5x user growth. Reduced app load time by 30%. Led cross-functional initiatives with product and design teams to enhance designer workflows.

Education

Degrees, certifications, and relevant coursework

UT

University of Tokyo

Master of Science, Computer Science

2009 - 2012

Grade: 3.9

Specialized in Human-Computer
Interaction and User Interface Design

UT

University of Tokyo

Bachelor of Science, Computer Science

2004 - 2009

Grade: 4.0

Graduated with honors

Availability

Looking for a job

Location

United States

Authorized to work in

Salary expectations

140k-160k USD

Job categories

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David Sasaki - Senior Software Engineer - Deep Market Making | Himalayas