Case Studies
CASE_001 · ERP / Industrial
Server-Driven UI Framework with Custom DAO
Dannie.CC · 2023–2024
// The Problem
Manufacturing facility with 9 departments required real-time UI updates across complex production lines. Standard deployment cycles (3-4 hours) were blocking business velocity, and legacy database interactions were becoming untraceable.
// Approach & Design
Architected a TypeScript-based Platform delivering JSON UI descriptors over WebSocket channels.
Designed and built DAO (Data Access Object): a custom ArangoDB ORM for high-performance graph/document queries and audit-safe ledgering.
Implemented a Dynamic Frontend Runtime in React that renders complex terminal views from server-side fragment definitions.
Centralized all business logic in the backend, enabling daily UI iterations with zero client-side deployments.
// Key Architecture Decisions
// Measurable Outcomes
// What We Shipped
Digitized 9 departments with an 80% reduction in frontend overhead. The system became the backbone for IATF 16949 certification by ensuring 100% server-side logic auditability.
CASE_002 · HealthTech / FHIR Compliance
Professional IoT & FHIR Data Platform
Actimi GmbH · 2022–2023
// The Problem
Building a remote monitoring platform for German providers required strict FHIR R4 and GDPR compliance. Existing medical data storage lacked proper clinical resource indexing, and device lifecycle management was manually error-prone.
// Approach & Design
Integrated IoT Medical Devices (Tablets, ECG, Blood Pressure monitors) into a unified clinical pipeline.
Automated Device Lifecycle Management: factory wipe + UUID regeneration via MDM for 100% GDPR traceability.
Redesigned the database with PostgreSQL GIN Indexes for high-frequency clinical FHIR searches (Patient, Observation, Encounter).
Implemented vendor-agnostic FHIR Adapters supporting both Aidbox and Medplum layers.
// Key Architecture Decisions
// Measurable Outcomes
// What We Shipped
Reduced clinical query latency from 800ms+ to 560ms while successfully passing three GDPR audits and scaling across Germany.
CASE_003 · Fintech / High-Performance Crypto
High-Frequency Crypto Trading & Copy-Trade Engine
DigiAlpha · 2021–2022
// The Problem
DigiAlpha needed a scalable exchange architecture for thousands of orders per second. The challenge was building a lock-free matching engine while managing complex multi-currency positions and virtual ledger balances.
// Approach & Design
Designed a Single-Threaded Matching Engine avoiding distributed consensus latency, fed by ordered event logs.
Built a Microservices Mesh handling KYC, Payment (Fiat/Crypto), Order Management, and Wallet services.
Developed an Internal Double-Entry Ledger for instant virtual settlements, reconciled asynchronously with blockchain confirmations.
Implemented Copy-Trading Logic using message broadcasting via RabbitMQ to trigger mirror orders with near-zero latency.
// Key Architecture Decisions
// Measurable Outcomes
// What We Shipped
Launched 5 trading modes in 12 months with zero data loss. The modular architecture easily scaled to support high-volume Copy-Trading features.