Software Developer

Kengo Yoshii

Kengo is a software engineer and a technical program manager. His passion is to create new products and services that solve people's unmet needs. He recently led 2 new edu-tech product developent projects in Sony R&D US from scratch, leading to a successful product launch and exiting to be accuired by a 3rd-party company. He has a combined experience of 15 years in software development, system design, and product management for both early-stage and well-established products.

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What I Do

Resume

Experience
2019 - Current Sony Corporation of America, R&D Center US, San Mateo, CA
Staff Research Engineer
  • Initiated a project and delivered an edu-tech product, Oppro, to help underserved youth connect with resources and social supports by leading research and design processes across educational institutions, achieving NPS of 40.
  • Developed and maintained a full-stack web app(React, Node.js, PostgreSQL, AWS EC2/RDS/S3, Cloud API integrations) by leading a team of 5 engineers.
  • Managed 11-member cross-functional team and delivered the project end to end from concept creation to successful product launch.
  • Led an iOS app development(Swift) for another R&D project and successfully released it on App Store, achieving the review rating 4.8. The app was acquired by an Edu-tech company in 2022.
  • Achieved 2nd Place in Global Hackathon 2020 for the Greater Good, featured by DocuSign.
2016 - 2019 Sony Interactive Entertainment LLC, Creative Center San Francisco, CA
Senior UX Engineer
  • Developed 5 wearable applications (JavaScript), increasing weekly active usage 5%.
  • Maximized 350 beta-user input by integrating their feedback to deliver open innovation project, featured by Engadget.
  • Designed a wearable audio-based AI virtual assistant and conducted user test through design sprint, leading to the successful launch of the prototypes to beta users.
2007 - 2016 Sony Corporation, Visual and Audio Business Unit, Tokyo, Japan
Software Engineer
  • Developed application framework by designing, implementing, and testing APIs for application developers.
  • Developed multiple embedded applications such as Software Keyboard, Browser, Youtube, and IPTV offerings on the Sony TV products.
  • Led 30-member global engineering team project of an embedded app framework development.
Education
2021 University of California, Berkeley, CA
Certificate in Engineering Leadership Professional Program

This program is specifically designed for rising star engineers and technical managers who want to advance their careers. ELPP is designed by engineers specifically for senior engineering leaders. The program recognizes and develops the managerial and decision-making abilities experienced engineers have acquired. ELPP enables engineers to apply their skills to the broader business, market, and competitive environments in which their companies operate. The program fully develops engineers’ innovative and entrepreneurial qualities and empowers them to apply these talents to a broader business environment.

2019 Stanford Continuing Studies, Palo Alto, CA
Principles of Product/Market Fit

Learned the basic challenge that all businesses must solve to be viable. It is product/market fit, matching what you have with what customers value and ultimately pay for.

2007 Doshisha University, Kyoto, Japan
Master of Engineering, Computer Science, GPA 3.71

My research was to develop a genetic algorithm to solve multi objective optimization problems in real world. Published international thesis as well as attending international conferences.

2005 Doshisha University, Kyoto, Japan
Bachelor of Engineering, Computer Science, GPA 3.72

Portfolio