Hire the Best Python Numpy Developers in California

I'm a VP of Product who went back to the keyboard. I spent a decade leading cross-functional technical teams at fintech and AI companies. Scaled Next Insurance from 20 people to a $2.6B acquisition while training machine learning models to beat traditional actuarial pricing. Lead the GenAI team at Klarity through its $70M Series B. Shipped products used by OpenAI's accounting team and Google. Led teams of 20+ engineers, sat in boardrooms, built the roadmaps. Then AI got good. Really good. And I didn't want to manage it from a slide deck — I wanted to build it. So I went deep. LLMs, agent frameworks, RAG, prompt engineering, trading algorithms. I even got to work on AI mixed with hybrid quantum computing full stack projects. I've been hooked since GPT-3, and it's only gotten more consuming since. Now I bring both the technical chops and the exec-level judgment to every project. I can write your LLM pipeline and walk your CFO through the business case. Results Products live at OpenAI, Google, Zoom, MongoDB, Epic Games, Colgate $20M+ ARR from AI-powered SaaS platforms I built and led 25% faster implementations via prompt eval frameworks and HITL feedback loops I designed Document automation at scale: revenue recognition, invoice processing, order-to-cash, expenses What I Build - GenAI & LLM Platforms. SaaS products with RAG pipelines, prompt engineering, guardrails, HITL eval - AI Agent Systems. Autonomous agents for doc processing, workflow automation, decision support - Algo Trading Systems. Custom algos, backtesting, quantitative strategy development - Enterprise Integrations. Salesforce, SAP, ERPs, CRMs Prototypes & MVPs Background Live algo trading systems across crypto spot, futures, DeFi VP Product (First Hire) at Green — stealth fintech/crypto neobank Founding GenAI Lead at Klarity — Series A → $70M Series B Founding PM at Limit — Acquired at Series A Senior PM & Strategy at Next Insurance — Series A → $2.6B acquisition Columbia University — Math & Economics Stack AI/ML: Python, LangChain, LangGraph, LlamaIndex, OpenAI API, Claude API, Gemini, HuggingFace, RAG, Vector DBs (Pinecone, Weaviate, ChromaDB), Fine-tuning Agentic: CrewAI, AutoGen, Multi-agent Orchestration, Tool-use Agents Trading: Backtesting, Signal Generation, pandas, NumPy, scikit-learn Backend: FastAPI, Node.js, PostgreSQL, Redis, AWS (Lambda, SageMaker, Bedrock), GCP (Vertex AI), Docker, Kubernetes Enterprise: Salesforce, SAP, REST/GraphQL, OAuth I respond fast. Let's talk.

Let's make the world healthier! I am a data/research scientist with 10+ years of deep involvement in neuroscience, biomedical engineering, and clinical research. My background includes digital signal processing, machine learning, statistical modeling & testing, and research design. Successfully-completed projects: 1. Automatic EEG artifact detection and editing 2. Time-series action recognition using acoustic and accelerometric data 3. Heartbeat-related ERP (HEP) visualization 4. ABX testing on food samples 5. Designing wearable sensors 6. Human performance analysis using PPG and GSR data 7. Heart-rate variability (HRV)-based clinical diagnosis 8. Implementing an online EEG/SSVEP-based brain-computer interface (BCI) 9. Automatic sleep-stage classification using deep neural network 10. Unsupervised clustering (Kmeans, UMAP) clinical data for individualized medicine 11. Academic research (50+ peer-reviewed articles, 3000+ citations, 100+ peer-reviews) Skillset: - Programming: Python, MATLAB, R, BigQuery - ML libraries: Scipy, Scikit-Learn, Pytorch, Pandas, Numpy - Data visualization: Matplotlib, ggplot2, Tableau - Electrophysiology: EEG (research-grade/wearable), ECG, EMG, EOG, PPG, GSR, accelerometer - Data acquisition: LabStramingLayer (LSL) - EEG analysis: EEGLAB, MNE - Version control: Github - Editing: LaTeX, BibTex

AI chatbots, voice agents, and LLM integrations built in Python and FastAPI. Production-grade, not demos. 6 years. GPT-4, Vapi, Retell AI, RAG, n8n. Systems that run in production, handle real users, and get handed over documented. ✔ AI phone agent on Twilio and OpenAI Realtime API. 35% reduction in call handling time, 18% improvement in customer satisfaction ✔ Multi-agent sales system with LangGraph and CrewAI. 60% improvement in outreach efficiency ✔ n8n AI chatbot with dynamic knowledge retrieval. Delivered in 2 days, 5-star review ✔ Agentic AI shopping system. Autonomous multi-step product research and recommendation ✔ Outbound AI calling system. Lead qualification fully automated, zero manual intervention 💬 AI CHATBOTS AND RAG SYSTEMS GPT-4 and Claude chatbots backed by RAG pipelines that retrieve answers from your actual data. Document ingestion, chunking, Pinecone semantic search, LangChain orchestration. Multi-turn memory, streaming responses, and deployment across web widgets, WhatsApp, Telegram, and Slack. Customer support automation, lead qualification, and internal knowledge assistants built for your knowledge base and tested against real edge cases. 🎙️ AI VOICE AGENTS Real-time inbound and outbound voice agents with sub-second latency. Built on Vapi, Retell AI, Twilio with OpenAI Realtime API, and ElevenLabs. Handles calls, qualifies leads, books appointments, and syncs every interaction to your CRM automatically. Multilingual. Custom voice personas. Tested against interruptions and unexpected inputs before going live. 🤖 LLM INTEGRATION AND AUTOMATION LangChain and LangGraph orchestration for multi-agent and agentic workflows. n8n and Make connecting AI outputs to GoHighLevel, HubSpot, Salesforce, and any CRM via API or webhook. FastAPI backends built for the throughput AI workloads demand. Prompt engineering, Redis caching, and token cost optimization from day one. 🛠️ TECH STACK GPT-4, Claude, LangChain, LangGraph, CrewAI, Pinecone, ChromaDB, FAISS Vapi, Retell AI, Twilio, OpenAI Realtime API, ElevenLabs n8n, Make, GoHighLevel, Zapier Python, FastAPI, REST APIs, WebSockets AWS, Docker, CI/CD 🧠 HOW I WORK Scoped before development. Built for production, not a demo environment. Handed over with documentation your team can actually use. ✔ Architecture defined before any code is written ✔ Tested against real edge cases, not scripted happy paths ✔ Full documentation and handover on every project ✔ Fast communication throughout, you always know where things stand 📩 BUILD WITH ME Need an AI chatbot, voice agent, RAG system, or LLM integration? Tell me what you are building, what it needs to connect to, and the specific outcome you need. I will give you a direct answer on the right approach within 24 hours.

𝗡𝗼𝘁𝗲: 𝗧𝗵𝗶𝘀 𝗶𝘀 𝗮 𝘀𝗲𝗻𝗶𝗼𝗿, 𝗽𝗿𝗲𝗺𝗶𝘂𝗺 𝗼𝗳𝗳𝗲𝗿𝗶𝗻𝗴. 𝗘𝗻𝗴𝗮𝗴𝗲𝗺𝗲𝗻𝘁𝘀 𝗳𝗼𝗰𝘂𝘀𝗲𝗱 𝗽𝗿𝗶𝗺𝗮𝗿𝗶𝗹𝘆 𝗼𝗻 𝗰𝗼𝘀𝘁 𝗮𝗿𝗲 𝗻𝗼𝘁 𝗮𝗹𝗶𝗴𝗻𝗲𝗱. ━━━━━━━━━━━━ 𝗣𝗥𝗢𝗙𝗜𝗟𝗘 𝗢𝗩𝗘𝗥𝗩𝗜𝗘𝗪 ━━━━━━━━━━━━ I am a senior 𝗖𝗧𝗢, 𝗣𝗿𝗼𝗱𝘂𝗰𝘁 𝗠𝗮𝗻𝗮𝗴𝗲𝗿, 𝗔𝗜/𝗠𝗟 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, 𝗮𝗻𝗱 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁 with 15+ years of experience, including 8 years at BMW AG, working on enterprise-scale, safety-critical, and data-intensive systems. I help organizations design, build, and scale complex software products by combining deep technical execution with product thinking and delivery leadership. My role typically sits between engineering and business. I translate product requirements into scalable architectures, guide teams through execution, and ensure systems are production-ready, secure, and maintainable. Clients work with me when they need senior ownership, technical clarity, and predictable delivery rather than task-based development. ━━━━━━━━━━━━━━━━━━ 𝗖𝗧𝗢 𝗔𝗡𝗗 𝗣𝗥𝗢𝗗𝗨𝗖𝗧 𝗟𝗘𝗔𝗗𝗘𝗥𝗦𝗛𝗜𝗣 ━━━━━━━━━━━━━━━━━━ As a CTO and PM, I own technology strategy and product execution end to end. This includes roadmap planning, architecture decisions, sprint planning, risk management, and stakeholder alignment. I regularly support startups and growing companies with technical strategy, system design, team leadership, architecture reviews, delivery governance, and scaling decisions. I focus on reducing technical debt early and aligning engineering decisions with business outcomes. ━━━━━━━━━━━━━━ 𝗦𝗢𝗟𝗨𝗧𝗜𝗢𝗡 𝗔𝗥𝗖𝗛𝗜𝗧𝗘𝗖𝗧𝗨𝗥𝗘 ━━━━━━━━━━━━━━ I design scalable, modular architectures with clear separation of concerns and long-term maintainability. Core experience includes distributed systems, microservices, API-first architectures, event-driven systems, PostgreSQL and relational data modeling, ETL pipelines, and workflow orchestration using Airflow. I prioritize performance, fault tolerance, observability, and cost efficiency. ━━━━━━━━━━━━ 𝗔𝗜, 𝗠𝗟, 𝗟𝗟𝗠, 𝗔𝗡𝗗 𝗡𝗟𝗣 ━━━━━━━━━━━━ I build and integrate AI-driven features into real production systems. My work includes machine learning, deep learning, time-series analysis, predictive modeling, and intelligent automation. I have hands-on experience with Python, TensorFlow, NumPy, Pandas, Keras, LLM-based solutions, NLP pipelines, and AI-assisted workflows. I focus on production usability, data quality, and measurable impact rather than experimental models. ━━━━━━━━━━━━━━━ 𝗙𝗨𝗟𝗟 𝗦𝗧𝗔𝗖𝗞 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧 ━━━━━━━━━━━━━━━ I deliver end-to-end development across frontend and backend using modern, proven stacks. Key technologies include MERN stack (MongoDB, Express.js, React, Node.js), Python, Django, Django REST Framework, REST APIs, WebSockets, asynchronous processing, background workers, JSON/XML, and SQL-based databases. I emphasize clean code, testability, and scalable system design. ━━━━━━━━━━━━━━━━ 𝗖𝗟𝗢𝗨𝗗, 𝗗𝗘𝗩𝗢𝗣𝗦, 𝗔𝗡𝗗 𝗦𝗖𝗔𝗟𝗜𝗡𝗚 ━━━━━━━━━━━━━━━━ I design and operate production-grade infrastructure on AWS and Google Cloud Platform. My experience includes CI/CD pipelines, deployment automation, containerized services, monitoring and observability with Grafana, infrastructure scaling, cost optimization, and security best practices. ━━━━━━━━━━━━━━ 𝗘𝗡𝗧𝗘𝗥𝗣𝗥𝗜𝗦𝗘 𝗘𝗫𝗣𝗘𝗥𝗜𝗘𝗡𝗖𝗘 ━━━━━━━━━━━━━━ At BMW AG, I worked within large enterprise environments on autonomous driving systems, including LIDAR, RADAR, and camera-based platforms, as well as automotive UI/UX systems. This experience shaped a disciplined approach to quality, documentation, cross-team collaboration, and delivery in complex ecosystems. ━━━━━━━━━━━━ 𝗘𝗡𝗚𝗔𝗚𝗘𝗠𝗘𝗡𝗧 𝗠𝗢𝗗𝗘𝗟 ━━━━━━━━━━━━ I engage either as a hands-on senior developer or as a CTO/Tech Lead, where I define architecture, guide execution, review code, and ensure delivery quality while a team handles implementation. In all cases, I remain accountable for outcomes. ━━━━━━━━━━ 𝗪𝗛𝗢 𝗧𝗛𝗜𝗦 𝗜𝗦 𝗙𝗢𝗥 ━━━━━━━━━━ This profile is intended for organizations seeking senior leadership, strong architecture, and reliable execution. If you need a CTO-level professional who can both lead and build complex systems, I am open to serious engagements. ━━━━━━━━ 𝗙𝗜𝗡𝗔𝗟 𝗡𝗢𝗧𝗘: ━━━━━━━━ 𝗥𝗲𝗮𝗰𝗵𝗶𝗻𝗴 𝘁𝗵𝗶𝘀 𝗽𝗼𝗶𝗻𝘁 𝘁𝗲𝗹𝗹𝘀 𝗺𝗲 𝗺𝘆 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗵𝗮𝘀 𝘆𝗼𝘂𝗿 𝗮𝘁𝘁𝗲𝗻𝘁𝗶𝗼𝗻. 𝗜 𝗮𝗽𝗽𝗿𝗲𝗰𝗶𝗮𝘁𝗲 𝘆𝗼𝘂𝗿 𝘁𝗶𝗺𝗲, 𝗮𝗻𝗱 𝘁𝗵𝗲 𝗺𝗼𝘀𝘁 𝗲𝗳𝗳𝗲𝗰𝘁𝗶𝘃𝗲 𝘄𝗮𝘆 𝗳𝗼𝗿𝘄𝗮𝗿𝗱 𝗶𝘀 𝗮 𝗳𝗼𝗰𝘂𝘀𝗲𝗱 𝗱𝗶𝘀𝗰𝘂𝘀𝘀𝗶𝗼𝗻 𝘁𝗼 𝗱𝗲𝗳𝗶𝗻𝗲 𝗱𝗶𝗿𝗲𝗰𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗺𝗼𝘃𝗲 𝗶𝗻𝘁𝗼 𝗮𝗰𝘁𝗶𝗼𝗻. 𝗔𝗽𝗽𝗿𝗲𝗰𝗶𝗮𝘁𝗲 𝘆𝗼𝘂𝗿 𝘁𝗶𝗺𝗲, 𝘀𝗽𝗲𝗮𝗸 𝘀𝗼𝗼𝗻 𝗔𝗻𝗱𝗿𝗲𝘄

I have 8 years of experience in Python development and my skills are listed below: - Web scrapers, bots, automation, web automation, scripting, API scripts, ETL; - Data extraction, data cleaning, data processing, data transformation; - Backend development, web apps with Flask, Django; - Frontend coding with HTML, CSS, Js; - Covering UI with selenium tests.

Top 1% Upwork Freelancer | Senior software engineer with 10+ years of systems engineering, problem solving, and business automation tasks. I enjoy integrating LLM's (such as OpenAI) into software to enable human-like intuition and interfaces that are efficient and intuitive. Areas of Expertise: - Python: I have over 10+ years experience (since Python 2) and have worked with LangChain, FastAPI, pandas/numpy, flask/django, requests, scikt/PyTorch/tensorflow/keras, multiprocessing/apscheduler/asyncio, and BioPython. - Rust: I have built several libraries ranging from parsers to embedded applications. - React: 3+ years of experience. I've built a highly complex components as well as incorporated websockets to enable intuitive and responsive interfaces. React is my "go-to" for most UI problems. I prefer to use react in combination with Typescript, but I have no problem using vanilla Javascript. - HTML/CSS: 15+ years of experience building static HTML interfaces. - Linux/Unix: This is my preferred platform. I have 5+ years of light devops / sys admin and am able to configure the system. I've effectively used Docker in a variety of contexts. - DBs: I have experience using Postgresql, supabase, MongoDB, and many others. - Figma: I use Figma to design mock interfaces and UML diagrams. My process begins with a piece of paper, where I plan and map my actions. This process of writing my thoughts and diagramming is transferred into helpful documentation and effective code. My goal is to leave you with a solution that performs well and is easy to build upon. Let's schedule an interview and see how I can help bring your ideas to life or solve your problems.