SOLUTION ARCHITECT / TECHNICAL LEAD
14 years building securities trading systems and fintech platforms.
Own the architecture of HSC's trading and digital platforms, from business requirements through design, technology selection and delivery oversight. Hands-on leadership: mentoring engineers, reviewing designs and code, and setting engineering standards for the delivery teams.
Digital health platforms for Southeast Asia: HelloBacsi (Vietnam, 20M pageviews/month), HelloSehat (Indonesia, 100M pageviews/month) and editions for 5 more markets. Plus Go.Care (medical tourism) and an interactive body-map symptom checker.
Built two job marketplaces: iTask360 for freelance work, and GoViec for recruitment.
Kept building operations systems for Japanese clients, from payroll to camera fleets.
First job: wrote a factory payroll system reading fingerprint attendance machines, IP-camera management software, and a traffic forecasting system built on vehicle GPS data.
Designed and delivered a high-performance OMS handling 10,000+ orders/second: execution states of each order applied strictly in sequence, with risk checks and order validation against exchange rules. Sub-10ms processing latency, zero downtime through high-volatility sessions.
Led the architecture of HSC's core trading systems aligned with KRX standards, improving scalability and resilience while cutting peak system load by 30–40%.
Backend engines computing P/L & ROI in real time, streamed straight to live portfolio dashboards.
Integration layer into partner banks' payment gateways: payment orders, internal transfers and withdrawals, later extended to e-KYC and settlement. Automates ~80% of cash-in/cash-out operations.
HSC's centralized OTP authentication service (SMS OTP, TOTP, HOTP), verifying users before every sensitive transaction. Designed the provider failover strategy and integration contracts for every consuming system.
Self-service portal for HSC customers: account opening, deposits, withdrawals, payments and stock utilities. Led solution design, service decomposition and API contracts with the core securities systems.
Centralized platform for the whole ecosystem: Kong API Gateway replacing point-to-point calls, centralized ELK logging for system-wide tracing, and a single CMS powering every HSC website.
Real-time notification systems (Email, SMS, API) with rule-based filtering and monitoring.