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Leon Hsi
Mid-level Solutions Consultant / Full-Stack Developer specializing in APIs, SQL, and cloud systems
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About
Builder with hands-on security hygiene experience from developing a helpdesk portal handling sensitive payment/invoice data, focusing on RBAC, least-privilege integrations (QuickBooks/Atera), and tightening API authorization to prevent cross-account access. Also built personal projects integrating Twilio/Callkeep/Supabase/OpenAI with strong key management and defensive handling of real-world API/network failure modes; holds an ISC2 certification and is actively deepening cloud security skills.
Experience
Education
Key Strengths
- Designs and implements RBAC and per-request authorization/ownership checks to prevent cross-account data exposure
- Practical secrets management and safe logging practices to reduce risk of credential/data leakage
- Methodical troubleshooting using logs, HTTP codes, and payload validation; reproduces issues and documents actionable summaries
- Communicates security tradeoffs to non-technical stakeholders using data-flow visualization and clear prioritization
- Integrates multiple third-party APIs and hardens against edge cases/timeouts with defensive coding
- Organizes and runs multiple concurrent onboardings/projects with proactive risk flagging and CRM-based tracking
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