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I build production AI systems that automate real business operations. My work spans multilingual customer service pipelines, prompt security frameworks, and evaluation infrastructure — delivering 95%+ accuracy and ~90% cost reduction at scale. What I bring to your project: I've built and shipped 27+ production AI agents across 36 international markets, designed prompt injection security test suites with 100% pass rates, and engineered automated evaluation pipelines with 100-case benchmarks per agent. I've also optimized computer vision models to 98% classification accuracy under strict memory constraints. Beyond LLM systems, I've developed RAG pipelines using Pinecone, curated 30+ prompt templates for clinical applications, built a chatbot that reached 10,000+ visits, and shipped an AI-powered Python IDE with sub-1-second completions. Core expertise: Prompt Engineering, LLM Pipeline Architecture, AI Agents, NLP, RAG, Multi-Agent Systems (LangChain), Computer Vision, Python, Evaluation Frameworks Background: CS graduate from DLSU-Dasmariñas (3.7 GPA), Institutional Thesis Competition Overall Champion against 100+ theses, Top Rated Upwork contractor. I treat every project like it's my own product. Let's talk if you're building something that needs to work.
Building — top 6% on LanceRank · 24 verified projects across 1 platform · 5 years active.
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Identity verified on LanceRank · 1 of 9 trust signal
Top 6% on LanceRank
Top 6% on LanceRank
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At a glance
Mark Spencer is a Computer Vision freelancer based in Bacoor with 24 verified projects, verified Upwork reputation, estimated LanceRank Score 54/100 (Building), 5 years active, last updated 2026-05-27 on LanceRank.
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