https://htknguyen.dev/tags/pre-sales/Recent content in Pre-Sales on Nguyen Hoang — AI Solutions ArchitectHugo -- gohugo.ioen-UShoangtrankhoinguyen@gmail.com (Nguyen Hoang)hoangtrankhoinguyen@gmail.com (Nguyen Hoang)© 2026 Nguyen HoangThu, 20 Aug 2026 00:00:00 +0000https://htknguyen.dev/projects/ai-voice-agent-call-center/Mon, 20 Jul 2026 00:00:00 +0000hoangtrankhoinguyen@gmail.com (Nguyen Hoang)https://htknguyen.dev/projects/ai-voice-agent-call-center/Replacing a human-staffed inbound call centre with a low-latency voice agent stack — LiveKit, Deepgram, RAG grounding and live telephony handoff.https://htknguyen.dev/posts/estimating-work-nobody-has-estimated-before/Thu, 20 Aug 2026 00:00:00 +0000hoangtrankhoinguyen@gmail.com (Nguyen Hoang)https://htknguyen.dev/posts/estimating-work-nobody-has-estimated-before/Bottom-up estimation assumes you can enumerate the tasks. AI projects break that assumption. How I price the loop instead of the line — and what belongs on page 23.https://htknguyen.dev/posts/the-tragedy-of-a-software-outsourcing-company/Thu, 06 Aug 2026 00:00:00 +0000hoangtrankhoinguyen@gmail.com (Nguyen Hoang)https://htknguyen.dev/posts/the-tragedy-of-a-software-outsourcing-company/A fictional nine-month project, from the Friday-night POC to the conditional acceptance nobody wanted. Everyone hits their KPI. Nobody measures what happens after signature.https://htknguyen.dev/posts/why-not-every-problem-needs-an-llm/Mon, 03 Aug 2026 00:00:00 +0000hoangtrankhoinguyen@gmail.com (Nguyen Hoang)https://htknguyen.dev/posts/why-not-every-problem-needs-an-llm/Notes on talking clients out of AI, and why deterministic logic still wins in regulated domains.