Hire the Best PyTorch Freelancers in California

PhD Candidate in Computer Science: Specializing in Machine Learning, Recommender Systems, and Personalization. - Education: Master’s degree in Computer Science from DePaul University. - Technical Proficiency: Expert in Python; skilled in TensorFlow, PyTorch, and SQL. Proficient with AWS and Linux environments. - Research Excellence: Authored influential papers on topics such as enhancing diversity in recommender systems, multi-aspect fairness, and the dynamics of user preferences. - Key Projects: -- Twitter Misinformation Classification: Developed an NLP classifier to detect misinformation in tweets with 98% accuracy. -- Automatic Cross-topic News Fact Checker: Built an NLP system that outperforms state-of-the-art models in detecting false claims. -- eBayML Challenge (2020): Secured 2nd place with a novel weakly supervised method for product identification. -- Personalized Learning Recommendation: Implemented a system for recommending extracurricular activities to high school students. - Freelance Commitment: Eager to apply and expand my skills in AI, offering tailored solutions and strategic insights to enhance your projects and business impact. I am a soon-to-be PhD graduate in Computer Science, specializing in Machine Learning, Recommendation Systems, and Personalization. With a master's degree in Computer Science from DePaul University, I am well-versed in the latest industry trends and technologies. Over the years, I have contributed to dozens of research papers in my field, showcasing my deep understanding and passion for AI-driven solutions. As a Python expert and data engineering enthusiast, I have hands-on experience in implementing a wide range of machine learning methods and techniques. My proficiency in data-driven algorithms and tools makes me the ideal candidate to tackle complex projects in any industry. As a freelancer, I am eager to bring my expertise and research-driven approach to your organization, delivering tailored solutions that cater to your specific needs. I'm committed to working with you to identify opportunities for improvement and growth, leveraging my knowledge and skills to create a significant impact on your business. Looking forward to collaborating with you and making a difference through innovation and cutting-edge technology!

Zhiyuan (Thomas) Yang Software Engineer | Algorithm Expert | Educator Hello! I’m Zhiyuan (Thomas) Yang, a versatile and passionate professional with a Master's degree in Computer Science and a proven track record in software development, algorithm design, and education. My career spans diverse industries, including IT services, education, and biopharmaceutical research, making me a well-rounded expert ready to tackle challenging projects. What I Do Best Software Development & Programming: Proficient in multiple programming languages, including C++, Python, Java, HTML, CSS, PHP, JavaScript, and SQL. I have experience in building scalable Data solutions to solve data challenges. I specialize in building efficient systems and crafting clean, maintainable code. Algorithm Design & Optimization: With strong analytical skills and a knack for problem-solving, I excel at designing efficient algorithms and data structures to optimize application performance. Web Development: Skilled in creating user-friendly and visually appealing websites and applications using modern frameworks and tools. Agile Project Management: Experienced in leading teams using Agile methodologies, including Scrum, for successful project delivery. Technical Training & Education: As a former university lecturer, I simplify complex technical concepts and enjoy teaching algorithm design, data structures, and software engineering. My Approach I bring a unique blend of technical expertise, creativity, and professionalism to every project. Whether it's developing a custom application, troubleshooting complex systems, or mentoring teams, I strive for excellence and client satisfaction. Why Choose Me? Diverse Industry Experience: From leading startups to teaching at universities, my career journey gives me a well-rounded perspective on challenges and solutions. Cross-Cultural Collaboration: With experience in both American and Japanese professional environments, I thrive in multicultural teams. Lifelong Learner: I stay up-to-date with emerging technologies to deliver innovative and efficient solutions to my clients. Let’s Work Together! If you’re looking for a reliable and skilled professional to bring your project to life, let’s connect. Whether you need cutting-edge software development, algorithm expertise, or project leadership, I’m here to help.

I build AI-enabled web applications, LLM workflows, RAG systems, and automation tools for businesses that need practical AI implementation connected to real products, data, APIs, and users. I am an applied AI engineer and software architect with deep experience in full-stack product development, enterprise architecture, systems integration, and technical leadership. My strength is not just calling an AI API; it is designing and building maintainable software systems where AI capabilities fit the actual business process. I can help you build: • AI-enabled SaaS features and internal tools • LLM-powered chat, assistant, and workflow applications • RAG systems and document-grounded generation • Tool-calling agents and human-in-the-loop review flows • AI automation connected to APIs, databases, and business systems • Dashboards for AI agents, workflow state, approvals, and traceability • Evaluation workflows, structured outputs, and quality checks • Full-stack AI applications using Next.js, TypeScript, Python, Supabase, PostgreSQL, Vercel, AWS, OpenAI, Anthropic, and related tooling Recent AI-related work includes: • Production AI-enabled marketing SaaS using OpenAI, React, GraphQL, Node, AWS, social media APIs, email marketing APIs, billing integration, staging/production environments, and human review workflows. • AI agent dashboards using Next.js, TypeScript, Supabase, OpenAI, Vercel AI SDK, durable workflow patterns, tool-calling agents, and persistent chat history. • RAG-style biography workflow application using Next.js, Supabase, OpenAI, retrieved reference material, structured generation, and approval/disapproval routing. • Weekend planning agent using Claude, tool calling, streamed responses, weather, search, routing APIs, and live agent trace display. • MCP Web Reader server that fetches web pages and returns clean Markdown using the Model Context Protocol SDK, Puppeteer, Mozilla Readability, and Turndown. • Computer vision and deep learning work using Python, PyTorch, OpenCV, EfficientNet-B2, ResNet50, TensorBoard, dataset curation, validation macro F1, checkpointing, and inference pipelines. My background also includes senior full-stack and enterprise architecture work across React, Next.js, TypeScript, GraphQL, Node.js, PostgreSQL, AWS, Vercel, API architecture, authentication, integration patterns, testing, deployment, and maintainable application design. I am not a frontier AI researcher, and I do not present experiments as production deployments. I focus on applied AI engineering: building systems that are useful, testable, maintainable, and aligned with real workflows. If you need a senior engineer who can design the architecture, build the application, integrate AI capabilities, and think through reliability, maintainability, and business process fit, I can help.

Over the past 10 years, I've helped startups, enterprises, and growing businesses build production-grade AI systems, earning Top 1% on Upwork. I hold an MS in Computer Science from Stanford University, specializing in Artificial Intelligence, with research in Information Retrieval, NLP, and Machine Learning. ✅ 200+ AI projects completed ✅ Top 1% on Upwork ✅ $700k+ earned as a Freelancer ✅ $1M+ earned through our Upwork Agency I specialize in Generative AI, AI Agents, AI Automation, Workflow Automation, LLMs, RAG, Machine Learning, NLP, Computer Vision, Data Science, Business Intelligence, Voice AI, Multi-Agent Systems, and Enterprise AI. Core Expertise • Generative AI & LLMs: OpenAI GPT-4o/o1/o3, Claude, Gemini, Llama, Mistral, Qwen, Grok, HuggingFace, Together AI, Ollama, Groq • AI Agents: LangGraph, LangChain, CrewAI, AutoGen, OpenAI Agents SDK, DSPy, LlamaIndex, Semantic Kernel, MCP, MemGPT • AI Automation: n8n, Make, Zapier, Pipedream, APIs, Webhooks, Celery, Redis, Temporal, Human-in-the-loop workflows • Enterprise RAG: Pinecone, Qdrant, Weaviate, ChromaDB, FAISS, pgvector, Neo4j, OpenSearch, Elasticsearch • Voice AI: Whisper, Deepgram, ElevenLabs, Retell AI, Bland AI, Twilio, LiveKit, Pipecat, Tavus, HeyGen • Computer Vision: OpenCV, YOLO, OCR, Stable Diffusion, Flux, ComfyUI, multimodal AI • Machine Learning: PyTorch, TensorFlow, Scikit-learn, XGBoost, forecasting, anomaly detection, recommendation systems • Full-Stack AI: Python, FastAPI, Django, Flask, Node.js, TypeScript, React, Next.js, PostgreSQL, GraphQL • Cloud & MLOps: AWS, Azure, GCP, Docker, Kubernetes, MLflow, BentoML, CI/CD • Integrations: Salesforce, HubSpot, Slack, Google Workspace, Microsoft Graph, Stripe, Twilio, Notion, Airtable, OAuth & REST APIs Selected Projects • Enterprise Legal AI Platform with contract intelligence, semantic search & RAG • Multi-Agent AI Automation Platform integrating CRM, email, documents, APIs & business workflows • AI Trading & Forecasting Platform using ML and time-series models • Insurance Intelligence Platform for litigation analytics • Enterprise Sustainability Analytics Platform • Public Health Monitoring System improving operational efficiency and real-time reporting Why Clients Hire Me ✔ Production-ready AI architectures ✔ Business-first automation strategy ✔ End-to-end delivery from architecture to deployment ✔ Clear communication and long-term partnership If you're building AI Agents, AI Employees, Multi-Agent Systems, Enterprise RAG, Voice AI, Internal Copilots, Workflow Automation, or production LLM applications, I'd be happy to help bring your product to production.