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Ling Lok Ngai
Mid-level Backend Software Engineer specializing in search infrastructure and AWS microservices
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Search/backend engineer with hands-on experience improving Apache Solr-based search systems end-to-end (indexing strategy changes, ETL updates, and Java/Spring Boot Search API work). Demonstrated production rigor with QA partnership, A/B testing, and rollback-safe kill switches, plus measurable product impact (e.g., +1.5% add-to-cart) and operational troubleshooting including traffic/security mitigation.
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Key Strengths
- Took search indexing optimization from research/prototype through production rollout with latency reduction
- Strong experimentation discipline: unit/integration tests plus A/B testing with rollback-safe kill switch
- Cross-functional collaboration with QA and security to validate changes and stabilize production traffic
- Systematic real-time troubleshooting: clarify, reproduce, analyze logs, identify root cause, route/escalate appropriately
- Product-impacting technical delivery: UX-driven facet/value redesign led to +1.5% add-to-cart rate and 2% drop in facet click rate
- Able to tailor technical workshops for mixed-technical audiences using demos and iterative feedback
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