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Samuel P.
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Samuel P.

Senior AI Engineer & Full Stack Dev | Agents & RAG | Fractional CTO

I build AI systems from the architecture up and take them all the way to production. I am a Top Rated Plus Senior AI Engineer and AI Systems Architect with more than 20 years in software engineering. I work with founders, startups, and companies that need someone senior enough to make the technical decisions and experienced enough to actually build what was designed. I am not limited to one part of the stack. I can take an idea, determine the right architecture, build the backend and frontend, integrate models and data, design the retrieval and agent layers, deploy the infrastructure, and get the system into the hands of real users. I also built Knolo, an open source knowledge infrastructure platform for AI. Building Knolo required solving problems around deterministic retrieval, portable knowledge, provenance, verification, agent infrastructure, local execution, and reproducibility. It reflects the kind of engineering work I specialize in: building the infrastructure underneath AI applications, not simply connecting an application to an LLM API. My client work includes AI MVPs, production AI applications, autonomous agents, multi agent systems, advanced RAG, private knowledge systems, voice agents, internal automation, custom AI platforms, on premise LLM deployments, local inference, GPU infrastructure, retrieval pipelines, vector search, reranking, legacy system modernization, and full stack product development. I work heavily with Python, TypeScript, React, Next.js, Node.js, Rust, Tauri, PostgreSQL, vector databases, Docker, OpenAI, Anthropic, open source models, Ollama, LangGraph, LangChain, LlamaIndex, and modern cloud and private infrastructure. I use AI assisted development tools aggressively because they allow an experienced engineer to move much faster, but generating code quickly is not the difficult part of building a production system. The difficult part is knowing what should be built. Architecture, data design, retrieval quality, model selection, agent boundaries, permissions, security, observability, evaluation, latency, infrastructure cost, failure recovery, deployment, and maintainability are where experienced engineering matters. That is where I bring the most value. Founders often hire me because they do not want to coordinate an AI engineer, backend engineer, frontend engineer, DevOps engineer, and architect just to get the first version of a product into production. I can own that entire technical path. I have founded and operated AI companies, worked in senior engineering roles, built production systems across AI, security, fraud, identity, retrieval, and infrastructure, and spent years making technical decisions where reliability matters. I am comfortable joining at the idea stage, taking over a difficult existing build, fixing an architecture that is no longer scaling, or leading development of a new AI product from zero to production. I move fast, but I do not build throwaway software. The goal is to ship something quickly without creating a system that has to be rewritten the moment customers start using it. If you need a senior engineer who can understand the business problem, design the system, write the code, make the difficult architecture decisions, and take ownership through production, that is the kind of work I do.

🇺🇸Miami Beach, United States$110/hr100% JSS4.91 (58)Since Sep 2019
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Earnings and projects

MRR
$4.6k

Last 6 months ÷ 6

World#6,364 / 412k
🇺🇸Country#2,060 / 62.1k
Revenue, last 30 days
$3.9k

Last 6 months: $27k

World#8,424 / 412k
🇺🇸Country#2,421 / 62.1k
Total earnings
$205k

Billed in all: $214k

World#14,712 / 412k
🇺🇸Country#3,603 / 62.1k
Per project
$2.5k

$9.1k in the last 6 months

World#64,676 / 412k
🇺🇸Country#10,833 / 62.1k
Projects, last 6 months
3
67% fixed33% hourly
World#66,479 / 412k
🇺🇸Country#8,998 / 62.1k
Projects in all
82

Across 87 contracts

80% fixed20% hourly
World#35,676 / 412k
🇺🇸Country#5,586 / 62.1k

Earnings, last 30 days

$214k+$3.9k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$210k$212k$214k$216kOct 8Oct 23Nov 7

Skill rankings: Top 2% in Firebase

Ranked by MRR among everyone on Upwork with the skill.

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  6. #166Firebase6,978 freelancers · 🇺🇸 #24Top 2%
  7. #265MongoDB10,865 freelancers · 🇺🇸 #22Top 2%
  8. #301Machine Learning8,972 freelancers · 🇺🇸 #86Top 3%