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San Francisco, CA, USA

Han W.

Fractional CTO, Mentor, and Builder

With over two decades of deep and diverse experience spanning startups to Google, I’ve built a toolbox to drive success in building MVPs, finding product-market fit, scaling, and managing mature products. As a Fractional CTO and advisor, I excel in helping companies navigate complexities and changes, communicating the strategies and rationales to all cross-functional stakeholders in languages they understand.

How can I add value for you?

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Han W.

Work

Sonder IPO

I joined Sonder at Series C stage. In my roughly 3 years of tenure at Sonder, I

• scaled my engineering org size from 6 to 53

• contributed to the system architecture scaling effort which transitioned a collection of monoliths to a cohesive SOA

• built out a set of processes that increased engineering productivity by 20%

• envisioned and delivered a product strategy that reduced operational cost by 78%

• contributed to the due diligence process that led to Sonder's successful IPO in early 2022

Experience

Nov 2025 — Present
ViviScout

ViviScout

Fractional

ViviScout provides real-time access to arterial health data through a non-invasive wearable device, enabling continuous monitoring of hemodynamic parameters.

Jul 2025 — Present
HW Tech Consulting LLC

HW Tech Consulting LLC

Founder

  • Fractional CTO & engineering leadership services for early stage VC-backed startups
  • Tech due diligence & post-close integration for PE firms and strategic acquirers
  • Tech consulting for SMBs to increase efficiency, grow revenue, and solve businesses challenges
  • https://hwconsulting.tech/
Sep 2022 — Present
More Good Days

More Good Days

Advisor

Digitally delivered programs grounded in the latest advancements in neuroscience and psychology for chronic pain.

Mar 2022 — Dec 2024
Google

Google

Sr. Engineering Manager

At Google, solving complex problems and creating opportunities with technology is at the heart of everything they do, aiming to improve lives globally.

  • Partnered with AI research, data science, technical writing, data engineering, and other Search teams to build and launch the Search AI Overview feature, demonstrating leadership in cross-disciplinary collaboration.
  • Owned multiple high-profile Search teams with search traffic constituting up to 4% of all Google Search, showcasing significant impact on core services.
  • Developed growth strategies and a three-year roadmap with cross-functional stakeholders, illustrating strategic planning and forward-thinking.
  • Led the launches of several key Search features by collaborating with up to six cross-organizational and cross-functional teams, contributing to a growth of Search up to 0.015%.
Jul 2021 — Mar 2022
Sonder Inc.

Sonder Inc.

Director of Engineering

Inspiring, award-winning design meets modern, mobile-first service. Welcome to the future of hospitality.

  • Created and grew strong cross-functional partnerships, leading an engineering org that supported significant growth in two major business domains at Sonder.
  • Drove company-wide adoption of a software procurement process SOP, endorsed by senior leadership.
  • Executed a tech strategy that integrated booking, operational task management, and supply chain systems into a seamless platform, achieving 22% operational efficiency and cost savings.
  • Successfully championed a low-code development model, reducing product development costs by 78% and delivery times by 75%.
Jun 2019 — Jul 2021
Sonder Inc.

Sonder Inc.

Sr. Engineering Manager

  • Drove the engineering initiative to shift the architecture from a monolith to microservices to sustain the product's growth and scale.
  • Raised engineering output by an average of 20% across all teams by revamping development processes and elevating team leaders.
  • Rebuilt the engineering career rubric for the entire organization, resulting in clearer expectations and processes.
  • Mentored and sponsored the growth and promotion of high-performing team members to tech leads and engineering managers.
Aug 2018 — Jan 2023
NachoNacho

NachoNacho

Advisor

NachoNacho is a B2B SaaS & AI + Services Marketplace powered by fintech, offering businesses massive discounts on major SaaS products and a streamlined way to manage subscriptions.

Oct 2017 — Nov 2018
Granular

Granular

Director of Engineering - AcreValue

Granular is a software and analytics platform improving farming efficiency, yields, and profits with a commitment to managing environmental impact. It's part of Corteva Agriscience, a leader in applying Silicon Valley tech to agriculture.

  • Led and drove the growth of the ML-based farmland valuation product by 10x in one year.
  • Closely collaborated with data science, product, and QA to re-architect and rebuild the data pipeline on AWS, reducing new data processing time from 2 weeks to 1 day.
  • Grew the engineering team by 5X and built out a QA team of 3.
Nov 2015 — Oct 2017
Storefront

Storefront

CTO

Storefront is a technology platform that makes retail accessible to anyone in the world, offering over 10,000 retail space listings worldwide.

Dec 2014 — Nov 2015
Soldsie

Soldsie

Director of Engineering

Soldsie is the world’s first social shopping service, helping retailers increase their profits through sales on Facebook and Instagram, managing everything from inventory to payment processing.

Jun 2014 — Nov 2014
CircleUp

CircleUp

Engineering Manager

CircleUp uses data and machine learning technology to empower entrepreneurs with funding and support, facilitating investments for 500+ brands with its platform, Helio.

Nov 2012 — Jun 2014
DemandStreet

DemandStreet

Co-founder and CTO

DemandStreet’s social media marketing platform helps small businesses generate leads, drive referrals, and publish engaging social content for industries like healthcare and beauty.

Aug 2010 — Oct 2012
MyVest

MyVest

Senior Software Developer / Technical Team Lead

MyVest provides strategic and technological investment management solutions for the financial services industry.

Jan 2009 — Aug 2010

Structural

Senior Software Developer

Aug 2005 — Dec 2008
Barclays Global Investors

Barclays Global Investors

Fixed Income Design and Development Engineer

BlackRock is a leading investment management corporation, providing asset management, risk management, and advisory services globally.

Jul 2002 — Sep 2002
Citrix Systems UK Ltd.

Citrix Systems UK Ltd.

Intern Software Engineer

Bitly enhances link management with customizable and trackable short links, QR codes, and landing page solutions.