Fabian Terh is a Senior Software Engineer at Meta working on WhatsApp’s chat infrastructure, with nine years of experience building high-performance, reliable systems that serve billions of users. He has driven performance optimizations that reduced write latencies by 20%, led efforts to improve end-to-end testing and rollout privacy features, and scaled product features across hundreds of millions of groups. A former law student turned engineer, Fabian blends rigorous analytical thinking with pragmatic engineering—publishing about his transition and maintaining side projects and open-source contributions to keep learning. Based in San Francisco, he pairs deep backend expertise with a habit of shipping practical tooling and infrastructure improvements that improve developer productivity and user experience.
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