Riku Kenju
Product Engineer & Founder.

Platform team - frontend architecture, the design system, and agentic developer tooling.

• –Proposed and owned the removal of Blueprint.js, the core component library blocking UI customization - delivered ahead of estimate with zero reported bugs in production, unblocking the upgrade to React 19.
• –Led the Nexus migration from a legacy data source to a new service: managed evolving data structures and architecture, revamped the UI of Connect (core product), coordinated customer communication with PMs, and deprecated the legacy UI code.
• –Partnered with UX to rebuild the design system - consistent design tokens plus a Figma-to-code Claude plugin that generates production code in our design language, enabling non-engineers to ship product-quality UI from Figma designs.
• –Built Claude skills for FE/BE deployment and parallel Linear ticket work (subagents + git worktrees, each ending in a tested, reviewed PR), letting me focus on work needing deeper attention while smaller, simpler tickets complete in the background.

Building AI-native products - home of the Fully Baked pipeline and Arotaro, an AI-powered mental health app live on Android and iOS.

• –Co-founded a three-person startup; designed and launched arotaro.ai (https://arotaro.ai/) - an AI-powered mental health app with a fortune-telling twist, built with React Native + FastAPI, live on the Android and iOS stores.
• –Designed and run the Fully Baked pipeline - an end-to-end agentic automation that ships my startup ideas as deployed prototypes, 17+ apps to date.
• –Integrated PostHog for product analytics - used funnels and engagement data to detect drop-off points and confusing features, driving every product iteration.
• –Migrated infrastructure from AWS to Azure (Microsoft for Startups credits), which allowed us to provide the app for free and study user behavior for improvements.
• –Built an internal agent creator that automates company operations and mundane tasks.

Feature work across the Windows 11 Widgets canvas in the Experience & Devices org.

• –Designed and shipped the Inline Video feature for Widgets - a video feed that reaches hundreds of millions of devices, driving +0.2% DAU, +1% engagement via non-navigation clicks, and transferring +1.69% of users to the Windows homepage. The architecture was adopted by the Games and Windows 10 teams for their own inline feeds.
• –Lived a telemetry-centric life: ran multiple flights (A/B experiments) per feature and analyzed scorecards to pick the best version before rollout.
• –Owned feature work across core Widgets experiences, including the notification and weather cards.
• –Eliminated and consolidated redundant background API calls for the widget, cutting server cost and reducing loading time: −3.67% AppError, −3.83% Time to Visual Readiness.

Frontend engineer on the MSN.com rebuild.

• –Rebuilt the MSN.com frontend from React to Web Components on a newly formed team, delivering full UI parity with the legacy (C#) MSN.com.
• –Drove the global rollout by analyzing per-market (country) flight scorecards and executing necessary adjustments to release the new MSN.com worldwide.
• –Shipped early Edge Sidebar features: infinite-scrolling news feed, in-place article reading, and customizable sidebar tabs.

Principal maintainer and SME for Launchpad, the company's authentication and user-management portal.

• –Architected a fast, scalable platform-wide permission service using DynamoDB, Lambda, and SQS.
• –Saw countless projects (OK, 12) from inception to production - architecture, data design, testing, infrastructure, deployment, and cross-team collaboration.
• –Earned the Relentless Award, the engineering org's recognition, for playing a critical role in the rebrand of the entire product.

Fullstack engineer across Ruby on Rails, React, and Node.js.

• –Led the transition from Backbone.js to React, improving robustness and speed.