Sep 2023 – May 2025 · 1 yr 8 mos

• Rufus, a new generative AI-powered conversational shopping experience
• Model Evaluation

Dec 2020 – Sep 2023 · 2 yrs 9 mos

• Amazon's Choice

Oct 2018 – Dec 2020 · 2 yrs 2 mos

• Personalization

Feb 2018 – Apr 2018 · 2 mos

• Backend based on Redis (with 95% of unit test coverage): https://pypi.org/project/pytwis/
• Frontend based on Flask: https://pypi.org/project/pytwask/

Oct 2016 – Dec 2017 · 1 yr 2 mos

• • Attended monthly calls to discuss and decide technical matters of AllJoyn releases and AllJoyn certification.

Jan 2016 – Oct 2018 · 2 yrs 9 mos

• Led the software development team (>20) to design software architecture and to implement integrated end-to-end IoT solutions including hardware modules, firmware, software, and cloud.
• Shipped two products within one year each and prototyped one within five months.
• o Reading Angel – A picture-book reading robot companion (>4K units sold).
• o Bingo – A free-talk & story-teller robot.
• o Cube – A STEAM toy robot which can navigate autonomously on maze maps.
• Actively drove the development life-cycle from requirements analysis, feasibility estimates, design, code, documentation, testing, implementation, and support.
• Developed project plans, resource planning, scheduling and managing development timelines.
• Co-managed and triaged all production issues related to firmware, software, and cloud.
• Formulated and enforced engineering guidelines for coding standard, code reviews, documentation, project management, and software release process, etc.
• Responsible for design reviews, code reviews, and mentoring the software development team.
• Set up, configured, and maintained the engineering system supporting >50 employees: Git for source control, Gerrit for code review, Redmine for project management, and Jenkins for continuous integration.
• Wrote customized Python and Jenkins pipeline scripts to build a continuous integration and delivery pipeline of building, testing, and deployment.
• Migrated the entire engineering system from AWS to AliCloud.

Oct 2015 – Dec 2017 · 2 yrs 2 mos

• This connector enables AllJoyn devices and applications to interoperate across wide area networks in a standard way.
• One of the two major contributors to the code and the documentation.
• Developed project plans and managed development timelines. Also reviewed submitted commits.

Jun 2011 – Jan 2016 · 4 yrs 7 mos

• Projects: Windows Threshold (10), Windows Phone Blue (8.1), Windows Phone Apollo (8.0).
• Designed and implemented components of the cellular telephony and data stack including user-mode services and kernel-mode drivers.
• Built cellular setting UI and the UI application for SIM Toolkit.
• Delivered new cellular features (e.g., Dual SIM, APN control) that ship in Windows Phone.
• Designed and implemented several key components of the software modem simulator including the call control and SMS.
• Defined and implemented the radio layer interface between OS and modem driver with modem vendors.
• Created internal test tools for debugging and root causing cellular-related issues.
• Debugged, investigated, and resolved cellular-related issues and feedbacks from both internal selfhosters and external customers.

Jun 2010 – Sep 2010 · 3 mos

• Used simplicial complexes and hypergraphs to model and characterize complex networks which are more than the sum of binary relationships, e.g. social networks with groups and cliques, wireless ad hoc networks with broadcasting or multicasting capability.
• Developed low-complexity algorithms for the shortest path problem and the minimum spanning tree problem in simplicial complexes, and apply them to solve the problems in social networks and wireless ad hoc networks. The performance of the algorithms are simulated in C++.

Dec 2009 – Mar 2010 · 3 mos

• Led a team to design a spectrum sensor for IEEE 802.22 that can detect the wireless microphone signal within the TV band. The designed spectrum sensor utilized the peak-to-average power spectrum ratio as the detection rule, and it was tested based on measured data.

Sep 2006 – Jun 2011 · 4 yrs 9 mos

• Analytically characterized the connectivity and multi-hop delay of large-scale ad hoc cognitive radio networks and verified the analytical results by network-level simulations.
• Proposed and implemented a low-complexity approximation algorithm with bounded performance guarantee for constructing the minimum-energy multicast.

Sep 2002 – Sep 2002 · 0 mo

• Won the Second Prize. Designed and implemented a digital alarm clock in VHSIC hardware description language (VHDL).