Sungjoon Steve Won's Portfolio

Windows 10 / 2015

WINDOWS 10 / 2015

Helping build the next generation Windows OS for desktop and mobile.


Program Manager for Windows Lock Screen experiences / Microsoft.

Led the feature crew, consisting of developers, testers, and a designer to define and drive the vision for this area.

In addition, I initiated a concept called "Don't forget" and shipped it for Windows 10 Mobile.

Windows 10 shipped worldwide on July 2015. 


Main responsibility was to provide the vision & direction for what the Lock Screen should be in Windows 10 and plan out how to deliver on that vision. In addition, I was deeply involved in the design process by working on designs & prototypes during the concepting phase. Responsibilities also included working with numerous teams across to organization to understand the needs that were being explored by other teams to build a surface that can enable both the scenarios being explored by the Lock Screen feature crew and our partner teams.

After finishing the planning phase, I stayed in this role until the 2nd development milestone before going back to being a designer.

Lock screen is the first screen you see, and sits above the Start screen and the deep-dive App experience. Because of this unique characteristic, we defined two clear goals. It shows me important notifications and info contextual at the moment at a glance, because it knows me. I can easily unlock and get to where I need to directly from the lock screen. 

[Source: The Verge]

[Source: The Verge]

Throughout the course of planning, we designed multiple new features. One of the key challenges as  PM was prioritizing what the team should go work on and making the hard cuts on ideas that were out of the scope given the product schedule & the development resources.

Ultimately, we held off on pursuing the new features instead to build a new framework that would allow Lock screen to run better across desktop & mobile platforms and to allow our partner teams to enable new experiences in Windows 10. This made sense despite letting go of the new features we explored, because this decision helped enable new features by our partner teams on the Lock screen and created greater user benefits in the end.

Lock screen is a high visibility surface that every user encounters. We worked with partner teams to help them enable new experiences such as

Windows Hello

Microsoft Spotlight / http://www.theverge.com/2015/4/29/8514345/windows-spotlight-lock-screen-with-ads

Microsoft Spotlight / http://www.theverge.com/2015/4/29/8514345/windows-spotlight-lock-screen-with-ads

Some reviews on Windows 10


Some may argue that phones have become the center of our lives. Many of us manage our day-to-day schedule in the phone, because it is with us throughout the day & is easy to check on-the-go. The Archilles heel to a phone is its battery. The phone will shut down, along with your information, if you aren’t able to recharge it in time. I was one of many users who’ve experience this problem, which pushed me to initiate this project.

Remind the user of important schedule & tasks before the device completely shuts down

My focus was on keeping the overall experience simple and lightweight while being useful. A device can shutdown primarily because of two reasons; the device is out of battery or user manually powers it down. For both cases, a delightful reminder can benefit the user. 

We’ve explored ways to add personality to make it more delightful. As we initially leaned towards richer ways to add personality, I realized that it would be better to keep the experience simple rather than reserving more battery before the shutdown sequence kicks off. 

My day-to-day tasks included driving the idea to production with the engineering team, designing the feature, and creating an early software prototype to demonstrate the experience.

The feature shipped as part of Windows 10 release for Mobile.