ymm

Full-Stack Developer · Digital Health · Mental Tech

Building software where engineering meets mental health.
104 essays on psychopathology. Lived experience. Production-grade code.

GitHub Email Live Demo Xi'an, China → Berlin/Munich, DE

Featured Product

Cognitive Posture Assessment (CPA)
Live · v1.0

A 37-question digital screening tool for cognitive posture assessment across 6 clinical dimensions: emotional rhythm, cognitive filtering, personality structure, attention systems, dissociative spectrum, and meritocratic load. Designed as a preliminary self-awareness instrument for conditions including bipolar disorder, depression, mania, ADHD, depersonalization, NPD, BPD, and meritocracy-related distress.

37
Questions
6
Dimensions
9
Conditions
0.8s
Avg Response
Self-Awareness Pre-Screening Mental Health Digital Health React Express SQLite Responsive
View Live Demo

Technical Architecture

React SPA
→
Express API
→
SQLite

Single-file HTML frontend with zero dependencies. RESTful Express backend with SQLite persistence. SSE-ready for real-time score streaming. Modular scoring engine for dimension-weighted risk calculation.

Clinical Value Proposition

Pre-Screening → Triage → Referral Pipeline

CPA is positioned as a Class I Medical Device (MDR) candidate under the German DiGA (Digitale Gesundheitsanwendungen) framework. Current implementation serves as a pre-screening tool; clinical validation and BfArM fast-track application are planned roadmap items.

MVP & Pilot Deployment
37-question assessment, risk scoring, radar chart visualization. Deployed. User data collection active.
FHIR R4 Integration
FHIR R4 Questionnaire/QuestionnaireResponse API deployed. 3 endpoints: export, template, submit. LOINC/SNOMED coded.
Clinical Validation Study
Partner with psychology department for reliability/validity study against gold-standard instruments (PHQ-9, GAD-7, MDQ).
BfArM DiGA Fast-Track
Submit for DiGA listing under §33a SGB V. Target: prescription-ready digital health application in Germany.

Other Projects

SukCommerce
Microservices 5 Services 18K LOC

Full e-commerce SaaS: 5 microservices, 2 frontends, API gateway. Built in 6 hours.

DocMind AI
RAG SSE Streaming 2-Day Build

Document Q&A with LLM streaming. RAG retrieval, citation panel, DeepSeek SSE integration.

BDI — Builder Density Instrument
Cognitive Assessment AI-Driven State Machine

AI-driven cognitive profiling system. 4-stage state machine: identity confirmation → fluid IQ → core detection → report generation.

Technical Skills

Frontend

  • React 19 + TypeScript
  • Tailwind CSS + shadcn/ui
  • GSAP + Framer Motion
  • Vite + SPA Optimization

Backend

  • Node.js + Express
  • PostgreSQL + SQLite
  • Redis + RabbitMQ
  • Docker + Nginx

AI / Data

  • LLM Integration (SSE/Streaming)
  • RAG Pipeline Design
  • REST API Architecture
  • FHIR R4 (in progress)

Domain Knowledge

  • Psychopathology (104 essays)
  • Digital Health / DiGA
  • Cognitive Assessment Design
  • MDR Class I Awareness

FHIR R4 Live API

HL7 FHIR Questionnaire Export
● Live v1.0

37-question CPA assessment exported as a standards-compliant FHIR R4 Questionnaire resource with LOINC/SNOMED coding, structured for DiGA interoperability.

// Export FHIR Questionnaire
GET 116.62.53.136:3459/api/fhir/questionnaire
→ FHIR R4 Questionnaire (37 items, 6 dimensions)
→ LOINC 44249-1 | SNOMED 13746004
// Submit & get FHIR Response
POST 116.62.53.136:3459/api/fhir/submit
→ FHIR R4 QuestionnaireResponse
→ Anonymous Patient | Device metadata
View Questionnaire JSON View Response Template
FHIR R4 HL7 DiGA LOINC SNOMED

Open to full-stack and frontend roles at Digital Health startups in Berlin · Munich · Remote
Available from October 2027 · Chancenkarte-ready

React TypeScript Node.js Digital Health DiGA FHIR