Senior Frontend Developer

Frontend Engineer (Part-Time) – Biometric AI DashboardAbout UsWe’re building Coherence Protocol – the “nervous system” layer for AI and humans. Our system integrates biometric signals (ECG, HRV) into real-time dashboards, powering executive performance and safety-critical AI systems.The RoleWe need a dedicated Frontend Engineer to take ownership of our UI layer. You’ll translate clean backend + agent outputs into a seamless web experience, ensuring clarity, stability, and precision. You’ll collaborate with backend/agent developers and code reviewers (based in Korea and the US), but your scope is 100% frontend delivery.What You’ll BuildExtend our existing React-based dashboard to support dual-signal visualizations (ECG + HRV).Implement shared Start/Stop/Pause controls across both signals.Add UI toggles (ECG-only, HRV-only, Both).Ensure timeline synchronization between signals.Polish UX: commit SHA footer, build-mode banner, “Sim state: stopped” clarity.Maintain PR hygiene: fork → branch → PR, squash-merge via maintainers.Must-Haves2+ years in React + TypeScript (student or early-career okay if strong).Experience with data visualization (Canvas, p5.js, or D3.js).Strong attention to detail, disciplined PR workflow.Ability to work independently on 10–15 hr/week basis.Nice-to-HavesFamiliarity with biometric data streams (HRV, ECG).Experience in startups, research projects, or OSS contributions.Understanding of UI testing (Cypress/Jest).What We OfferFlexible part-time role (remote).Direct impact in a frontier AI + biotech system.Close mentorship + review loop from a highly technical founding team.Opportunity to grow into a longer-term role as we scale. To apply: Send your resume + GitHub/portfolio + a short note on your visualization experience.