Chang Ching

Product Designer with an MA in Human-Computer Interaction and five years of prior clinical experience. Designed and shipped a clinician-facing healthcare product and independently took an AI-powered iOS app from concept to TestFlight.

Experience spans product design, interaction design, user research, prototyping, design systems, usability testing, and implementation.

Product Designer — Independent Project at Settleo (2026-04 – 2026-08)

• Designed and built an AI-powered iOS bill-splitting app from concept to TestFlight, covering product definition, UX/UI design, prototyping, implementation, and testing.

• Designed the AI-assisted receipt scanning and itemization flow, while allowing users without paid receipt scanning to manually add items and tag people with dietary restrictions.

• Conducted observational usability testing with 4 participants, tracking task-completion problems, repeated attempts, and participant feedback to revise the core splitting flow.

• Reduced a real group bill-splitting workflow from approximately 20 minutes to 2 minutes by consolidating receipt processing, item assignment, and dietary handling into a single flow.

• Built a reusable component library and worked directly with Claude Code and Supabase/Postgres to carry designs into the functioning iOS product.

Product Designer at GattyInstruments AB (2026-01 – 2026-06)

• Owned the redesign of a complex respiratory testing product as it transitioned into clinical use, translating user and product requirements into information architecture, user flows, interaction patterns, and detailed UX/UI designs.

• Reorganized complex respiratory test results and clinical data into clearer information hierarchies for clinicians reviewing and communicating results.

• Conducted a safety-focused heuristic evaluation to identify usability problems and potential sources of user error across key workflows.

• Built high-fidelity interactive prototypes in Figma Make and Claude Code and worked with engineers to translate product requirements into implementation-ready design specifications.

• Built and scaled a Figma design system with primitive and semantic tokens for color, typography, and spacing and a library of 31 reusable components.

• Defined component states, variants, documentation, usage guidelines, and WCAG contrast requirements to support consistent and accessible implementation.

• Used an AI-assisted workflow with Claude Code to sync Figma variables to JSON design tokens and Storybook, keeping design and code consistent.

Product Designer at Shenzhen Customer Obsession Inc (2025-08 – 2026-01)

• Designed and delivered responsive websites for three client projects, from requirements gathering and UX/UI design through implementation in WordPress.

• Wrote PRDs and translated stakeholder requirements into page structures, user flows, and implementation-ready designs.

• Worked directly with stakeholders through review and iteration while managing two concurrent projects.

Registered Nurse — Psychiatric ER/ICU at Taipei, Taiwan (2018-02 – 2023-10)

• Delivered care in high-acuity psychiatric ER and ICU settings, working with multidisciplinary teams and making time-critical decisions for 6–8 patients daily.

Registered Nurse — Cardiovascular Surgery ICU at Taipei, Taiwan (2017-10 – 2017-12)

• Managed postoperative care in a 12-bed ICU, coordinating closely with surgical and anesthesiology teams.

MA in Human-Computer Interaction – Uppsala University (2026-01 – 2026-06)

BS in Nursing – Chang Gung University (2017-01 – 2017-06)