Hi, I'm Erichain!

1Prompt is an all-in-one AI prompts managing platform built for creating, testing, and version-controlling prompts. It can help users streamline how they manage and ship generative AI prompts at scale. Gained early traction with hundreds of real users before operations were put on hold due to funding.

• Owned the full product lifecycle end-to-end, including product design, UI design, and project architecture design.
• Wrote, tested, and shipped all frontend and backend code independently.
• Integrated LLM APIs across multiple providers (domestic and international) to power real-time prompt testing.
• Integrated Stripe for smooth payment flow.

Women's Whole-Life Health Tracking App (In development)

• Drove all pre-development groundwork: tech stack selection, UI design, PRD, and product roadmap.
• Independently built 80% of the app's features, including Apple Watch and widget support.

• Owned development and maintenance of the core AI subscription service, supporting a user base of 500K+.
• Led the end-to-end rollout of AI-driven development workflows across the project.
• Built a frontend log reporting service on top of Loki, cutting online issue resolution time by 60%.
• Adopted TDD alongside AI-assisted coding, achieving 90%+ AI-generated code in production with 70%+ unit test coverage maintained throughout.
• Introduced spec-driven development (SDD), enabling new features to be scoped and built from a single prompt. About 70% of features and bug fixes shipped right on the first pass, reducing overall development time by 50%+ at least.
• Established and enforced team-wide standards across code style, documentation, and Harness Engineering practices.

• Built a multimodal AI conversation flow supporting text generation (via streaming) and image generation;
• Implemented complex conversation management including multi-turn dialogue, message editing, response regeneration, and context-aware action suggestions per turn;
• Delivered smooth, production-grade animations and transitions throughout the conversation UI to ensure a fluid user experience.

• Abstracted an atomic-level components library within a short time, doubling page delivery efficiency and successfully supporting the game's rapid launch;
• Handled audio/video compatibility across multiple mobile browsers, including various phone brands and in-app browsers such as WeChat and QQ etc.;
• Reduced static asset load time by 45% by building an automated FFmpeg optimization script pipeline.

• Led app architecture setup, built reusable component library, and designed the data flow architecture;
• Collaborated with the backend team to design and implement a flexible, generalized approval workflow system.

• Led the frontend architecture design based on Redux + Context + Hooks, supporting complex interactions and state management across the system;
• Built a shared Hooks library and reusable business components integrated with backend APIs, enabling plug-and-play usage across the team;
• Solved complex interaction challenges within deeply nested data structures, including inline editing (onFocus/onBlur) and dynamic list rendering;
• Rolled out across the entire Waimai business unit, supporting ~20,000 OKR entries and receiving strong recognition from stakeholders.

• Led the design and development of a unified frontend toolchain adopted by the team;
• Integrated a custom build system and third-party error monitoring; established code and development standards;
• Achieved 60% team-wide project adoption with 30+ iterative releases;
• Reduced new project setup time to under 1 minute; new team members can get familiar with projects at no cost.