Backend Engineer (AI Implementation) at ADCASA (AdGPT) (2025-06 – 2025-11)
- Designed and implemented core backend services as modular APIs, integrating LLM function calling protocols for real-time content generation.
- Adopted a strict Test-Driven Development (TDD) approach, ensuring 100% test coverage for critical endpoints while maintaining high implementation velocity.
- Architected scalable database schemas to support complex service integrations, optimizing data fetching processes to be 20x faster.
- Built robust API integrations for third-party services (ads, analytics) ensuring developer friendly documentation and maintainability.
- Refined backend infrastructure to support higher concurrency, reducing latency for customer-facing AI experiences.
Lead Backend Engineer (Freelance) at NSISONG LABS (2016-09 – 2025-05)
Led the engineering of scalable backend systems for clients in medtech and fintech, scaling team operations to 11 members.
- Implemented modular microservices using Python and NestJS, utilizing Redis-backed caching to cut response times by 35%.
- Enforced TDD workflows and automated testing pipelines across all projects to reduce regression risks.
- Engineered AI-powered automation solutions that reduced manual workload by streamlining complex business logic into efficient API services.
- Managed full lifecycle deployment using Docker and GitHub Actions, ensuring smooth CI/CD transitions for high-traffic applications.
LIS Automation Engineer at Duchess Int'l Hospital (2023-10 – 2025-01)
- Engineered a high throughput automation layer to interface directly with Mindray machines and Hematology analyzers, eliminating manual data entry and human error.
- Developed a custom middleware to parse and transmit HL7 (Health Level Seven) messages, ensuring seamless bidirectional communication between laboratory hardware and the hospital's central database.
- Handled low-level serial/network socket programming to capture raw machine output, transforming unstructured data into validated, production-ready JSON payloads for the backend.
- Implemented a strict validation engine to ensure 100% accuracy of patient results during the automated transfer, critical for clinical diagnostic reliability.
Lead Blockchain Engineer at P2PFI (2022-01 – 2023-01)
- Designed and developed smart contract systems powering a decentralized peer-to-peer financial platform.
- Built backend services integrating blockchain events with real-time application dashboards.
- Implemented decentralized liquidity mechanisms enabling automated asset exchange.
- Developed scalable backend APIs supporting secure financial transactions.
- Optimized blockchain event processing pipelines, reducing latency and improving system performance.
Blockchain Developer (Smart Contract) at MobileGo (MGO) (2018-07 – 2018-12)
- Developed and optimized Ethereum based smart contracts for the MGO token ecosystem to facilitate in-game purchases and eSports tournament rewards.
- Architected decentralized peer-to-peer (P2P) payment structures for secure transactions between gamers and developers.
- Enhanced smart contract security by implementing industry standard access control patterns, effectively protecting tournament reward pools from unauthorized withdrawals.
Junior Smart Contract Engineer at Multiven (MOM) (2018-03 – 2018-05)
- Developed and optimized Ethereum based smart contracts for the MGO token ecosystem to facilitate in-game purchases and eSports tournament rewards.
- Contributed to smart contract development for a blockchain-based decentralized marketplace for IT hardware and services.
- Assisted in building the logic for the Multicoin (MTCN) utility token to enable peer-to-peer trading without intermediaries.
- Conducted rigorous unit testing and security simulations to ensure the MTCN token was resilient against common EVM vulnerabilities like reentrancy and integer overflow.
Smart Contract Developer at FamilyPoints (2017-08 – 2018-02)
- Developed smart contracts for a rewards and review ecosystem on the NEM blockchain for the parenting products market.
- Engineered the native FPT token logic to enable cashback reward distribution and incentive based engagement.
- Optimized reward distribution algorithms to handle high transaction volumes while maintaining absolute data integrity across the decentralized review ledger.
