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Ilya P.

Leander, Texas

$80/hr
5.0
15 jobs

Senior full-stack engineer and team lead with 20+ years of experience. I specialize in real-time video / WebRTC streaming and in AI/ML systems that ship to production. I currently lead engineering at a live-video startup, where I architect streaming, scalable real-time chat, and AI features across the entire stack. Across my career I've built high-load platforms, custom HTML5 video players, and developer tooling serving thousands of concurrent users. I can help you with two things in particular: Real-time video & streaming: WebRTC, live streaming, HLS, HTML5 and custom video players, low-latency media pipelines, and scalable chat. AI/ML engineering: LLM-powered apps, MCP servers & plugins, autonomous agents and workflows, RAG with vector databases, model fine-tuning (Hugging Face, PyTorch, LoRA/PEFT), and reinforcement learning (training models and building custom RL environments). Core stack: TypeScript/JavaScript, Go, Python, Rust, Node.js, React, Next.js; PostgreSQL, MongoDB, Redis; Google Cloud, AWS, Docker, Kubernetes. Open-source author: I created and maintain StateFlow (stateflow.dev) โ€” a type-safe, predictable state-management library for TypeScript, running in production at the company I lead. What you get working with me: clean, testable, production-grade code; clear communication; and a senior engineer who can both lead the architecture and do the hands-on work to ship it. Building a video product, an AI/LLM feature, or an autonomous agent or need a senior lead to take something from idea to launch? Send me a message with a few details about your project and I'll tell you exactly how I'd approach it.

  • Open Source
  • TypeScript
  • Golang
  • Python
  • Rust
  • PyTorch
  • WebRTC
  • Video Stream
  • Node.js
  • LLM Prompt Engineering
  • AI Model Training
  • AI Agent Development
  • Reinforcement Learning
  • Full-Stack Development
  • SDK
Sanjay S.

Cupertino, California

$95/hr
4.9
288 jobs

I have experience in building custom software solutions tailor-made to your requirements. My skill-set spans multiple domains like financial, healthcare, eCommerce, advertising, education, life sciences, hotel/hospitality, media and entertainment, retail, real estate, sports and fitness, mobile and wireless, technology, non-profit and more industries. I use structured programming incorporating leading & tested frameworks, best programming practices, coding guidelines and standards. As the technology advances gradually and the programming landscape changes globally, inorder to accommodate the world's growing technological needs, I constantly evaluate the latest trends in the development community and try to constantly improve and upgrade my skills to provide my clients the best possible development solutions.

  • Open Source
  • .NET Framework
  • PHP
  • Database
  • Python
  • React
  • Angular
  • AJAX
  • ChatGPT
  • Google Cloud Platform
  • Facebook Development
  • Google Map Maker
  • Linux System Administration
  • Moodle
  • OAuth
Chad C.

Taylors, South Carolina

$100/hr
5.0
2 jobs

Most AI consultants build demos. I build systems that run in production. I spent 20 years shipping software before going deep on Generative AI. Now I architect and deliver RAG systems, multi-agent applications, and LLM-powered products for clients who need more than a proof of concept. I work with GPT-4, Claude, Gemini, and open-source models like Llama and Mistral. I use LangChain and LangGraph to orchestrate agents that actually coordinate work across tools, APIs, and teams. What sets me apart: I deploy AI on-premise. When your data cannot leave your building, I run models locally on Apple Silicon (MLX) and NVIDIA GPUs (CUDA). I have built HIPAA-compliant training pipelines where PHI never touches the cloud. I benchmark and optimize models on your hardware, not mine. I run Stratus Labs, a private AI R&D firm focused on forward-deployed AI engineering. I embed with clients, map their systems, build the missing pieces, train their teams, and hand off ownership. I lead a senior engineering team, communicate directly with US clients in US hours, and deliver on schedule. ๐–๐ก๐š๐ญ ๐ˆ ๐ƒ๐ž๐ฅ๐ข๐ฏ๐ž๐ซ Production RAG systems over private document sets for legal, healthcare, financial, and operational use cases. Hybrid retrieval, reranking, citation extraction, reduced hallucination. Multi-agent workflows that coordinate tasks across email, calendar, CRM, and internal tools using LangGraph orchestration with human-in-the-loop approval gates. LLM MVPs and POCs delivered fast. Spec to working demo in days, not months. Production-ready architecture from day one. Full-stack AI applications with React, Next.js, Python/FastAPI, and Node.js. APIs, integrations, and real-time AI UX. On-premise LLM deployment and fine-tuning on Apple Silicon (M1/M2/M3/M4 Ultra, Mac Studio, Mac Pro) and NVIDIA GPUs (A100, H100, RTX). Air-gapped environments with zero cloud dependency. ๐‘๐ž๐œ๐ž๐ง๐ญ ๐ƒ๐ž๐ฅ๐ข๐ฏ๐ž๐ซ๐ฒ Real estate operations: AI document intake replaced 6+ hours of manual review with 15-minute automated triage. Multi-agent email coordination now handles 80% of vendor communications. Legal services: RAG assistant over 50K+ documents cut attorney research time by 70%. Healthcare (HIPAA): On-premise LLM training on Apple Silicon. PHI stays local. Full compliance, zero cloud. Private equity: Automated due diligence extraction reduced analyst review from 2 weeks to 2 days. SaaS company: AI support triage with 60% ticket deflection and 3x faster resolution. Marketing agency: On-brand content generation trained on client voice data. 85% of first drafts pass review. ๐“๐ž๐œ๐ก ๐’๐ญ๐š๐œ๐ค LLMs: GPT-4o, o1, o3, Claude 3.5/4, Gemini 2.0, Llama 3, Qwen, Mistral, DeepSeek Agents: LangGraph, LangChain, MCP, CrewAI, LlamaIndex, DSPy, Instructor RAG: Pinecone, Qdrant, Weaviate, pgvector, Chroma, Milvus, FAISS Local Inference: Ollama, LM Studio, llama.cpp, ExLlamaV2 Fine-Tuning: LoRA, QLoRA, PEFT, Hugging Face, Axolotl, Unsloth Evaluation: LangSmith, RAGAS, DeepEval, Promptfoo, Weights & Biases Full-Stack: Python, FastAPI, Django, Node.js, React, Next.js, TypeScript, PostgreSQL, MongoDB, Redis Cloud: AWS Bedrock/SageMaker, GCP Vertex AI, Azure OpenAI, Docker, Kubernetes ๐‡๐จ๐ฐ ๐ˆ ๐–๐จ๐ซ๐ค Full lifecycle ownership: discovery, architecture, build, deploy, train your team, handoff. Direct communication. No account managers. US-based, US hours. I scope accurately and deliver what I commit to. ๐‹๐ž๐ญ'๐ฌ ๐๐ฎ๐ข๐ฅ๐ If you need production AI systems, intelligent multi-agent workflows, or private on-prem deployment on Apple or NVIDIA hardware, I can take it from architecture to production. Tell me what you're solving. I'll tell you how I'd ship it. ๐’๐ค๐ข๐ฅ๐ฅ๐ฌ: LLM Development, RAG, LangChain, LangGraph, Multi-Agent Systems, OpenAI, GPT-4, Claude, Gemini, Llama, Mistral, MLX, NVIDIA, CUDA, vLLM, Ollama, On-Premise AI, Local LLM, HIPAA AI, Pinecone, Qdrant, Weaviate, pgvector, Fine-Tuning, LoRA, LangSmith, MCP, Python, FastAPI, React, Next.js, Node.js, TypeScript, Full Stack, AI MVP, Healthcare AI, Legal AI, Document AI

  • Artificial Intelligence
  • Machine Learning
  • Natural Language Processing
  • Large Language Model
  • AI Agent Development
  • LangChain
  • Prompt Engineering
  • Retrieval Augmented Generation
  • Full-Stack Development
  • Python
  • AI Bot
  • TypeScript
  • JavaScript
  • API
  • OpenAI API
  • Automation
  • Conversational AI
  • Next.js
  • FastAPI
  • Node.js
Laiba K.

Austin, Texas

$15/hr
5.0
7 jobs

Hi, I'm Laiba๐Ÿ‘‹ Send me an invite or message, and I'll reply with a personalized Loom showing exactly how I'd automate your workflow. โœ… Saved $4,255+/mo for a leading e-commerce bookstore by automating inventory management โœ… Cut 90% of manual task delegation for Cardello Architects with an AI task-management chatbot โœ… Reclaimed $2,185/mo for a digital media agency with a fully autonomous newsletter system โ€”โ€”โ€” A longer, more detailed breakdown: Pleasure to meet you! Most clients work with me because I quickly understand messy business workflows and turn them into high-ROI automation systems. I currently serve as a lead engineer at Automation Architecture AI, a global agency focused on building operational automation systems for businesses. I also work directly with companies to eliminate CRM bottlenecks, streamline content pipelines, and build AI agents that completely handle operational work. What I'm best at: โœ… Advanced Workflow Automations I design production-grade automations built to scale. Using Make and n8n, these systems connect CRMs, email, databases, payments, and internal platforms. I specialize in automating dashboards, client onboarding and billing, content pipelines, task orchestration and lead capture systems. Every tool can be integrated with custom APIs when needed. โœ… AI Agents I develop custom AI agents and intelligent chatbots powered by GPT-5, Claude Opus/Sonnet 4.6, Gemini 3, LLaMA, and others. These agents handle lead qualification, outbound outreach, document processing, and act as digital operators for your business 24/7. โœ… CRM & Live Database Systems I automate pipelines and live data syncing with HubSpot, Salesforce, GoHighLevel, Airtable, Notion, Supabase, and Pipedrive, creating dashboards that free your team from repetitive database work and let them focus on revenue. โ€”โ€”โ€” I leverage my experience building intelligent systems to deliver high-ROI automation solutions for your business. If you're looking for a partner who can architect reliable systems that scale, send me a message. I'd love to discuss how I can help you achieve ๐ฒ๐จ๐ฎ๐ซ ๐ ๐จ๐š๐ฅ๐ฌ. Skills & Tech Stack: - Make, n8n, and Zapier - Javascript - Any CRM or database platform - Large Language Models - Generative AI - AI Chatbot - AI Agent Development - AI Bot - Conversational AI - Custom API integrations

  • Artificial Intelligence
  • AI Agent Development
  • AI App Development
  • AI Bot
  • AI Chatbot
  • Automation
  • Automated Workflow
  • n8n
  • HighLevel
  • AI Development
  • Automated Testing
Leon S.

Albany, New York

$110/hr
4.9
60 jobs

I build and fix WordPress & WooCommerce sites on fixed prices with committed delivery dates. Most projects ship in days, not weeks. $80K+ earned on Upwork across 49 jobs, including a 773-hour WooCommerce engagement for a single client: custom cart flows and a product build-out configurator for a lighting company. By day I'm a senior developer at StudioRx (Omnicom Health), building React, Next.js, TypeScript and WordPress applications under strict regulatory and accessibility standards. I'm the internal subject matter expert for ADA/WCAG accessibility, I typically handle the most complex backend work, and the signed, cross-platform desktop app I built replaced a local-server workaround for convention panels and became the standard delivery format across the practice. By night I take one or two Upwork projects at a time, so your project gets focused, senior-level attention without agency overhead. What I bring to your project: โ€ข WordPress & WooCommerce: custom themes and plugins, payment gateways (Stripe, PayPal, and friends), catalogue/enquiry builds, LMS and membership sites, migrations with SEO intact. When an off-the-shelf plugin can't do it, I read the WooCommerce core and make it do it. โ€ข Full-Stack: PHP/MySQL, Node.js, REST/GraphQL APIs, React, Vue, Next.js, Tailwind CSS. โ€ข Performance and accessibility: deep audits of bloated plugins, custom replacements, cache and asset strategies, Core Web Vitals in the green, WCAG that passes an audit. โ€ข Technical leadership: development standards, QA checklists and AI-assisted workflows that a team can run without me. โ€ข Automation-heavy delivery pipeline (scaffolding, testing, content population). It's how I quote days instead of weeks. How I work: fixed price, milestone by milestone, with a delivery date in writing. You review and approve each milestone before releasing payment. Staging first; your live site is never the test environment. If you need clean, maintainable code delivered on a date I put in writing, let's talk.

  • PHP
  • HTML
  • JavaScript
  • WordPress
  • CSS
  • WooCommerce
  • React
  • JSON
  • Redux
  • RESTful Architecture
Ilsa E.

Richmond, Texas

$20/hr
5.0
18 jobs

๐Ÿ’ก FREE AI / Backend / Automation Audit + Scalable Roadmap Before We Start Most AI and automation projects fail not because of bad ideasโ€ฆ But because the backend, agent architecture, or workflow system wasn't built to scale. โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” ๐Ÿšจ IF YOU ARE STRUGGLING WITH: โžค AI agents that don't work reliably in production โžค n8n workflows that break or can't scale โžค GHL systems that are messy or not converting โžค RAG pipelines with hallucinations or slow retrieval โžค Backend APIs that fail under load โžค AI ideas stuck in prototype phase ๐Ÿ‘‰ YOU ARE IN THE RIGHT PLACE. โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” โœ… WHAT I BUILD I build production-ready AI systems, agentic workflows, and scalable automation infrastructure. โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” ๐Ÿค– AI AGENT & LLM DEVELOPMENT โžค Multi-agent systems (LangChain, LangGraph, CrewAI) โžค RAG pipelines with vector databases (Pinecone, pgvector, Chroma) โžค LLM integration (OpenAI, Claude, Gemini) โžค Tool calling & function execution โžค Prompt engineering for production reliability โžค AI agents with memory and context management โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” โš™๏ธ n8n & WORKFLOW AUTOMATION โžค Complex n8n workflows with error handling & retry logic โžค API integrations (REST, webhooks, OAuth) โžค Self-hosted n8n deployment โžค Webhook orchestration & event-driven automation โžค Human-in-the-loop approval workflows โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” ๐Ÿ“Š GHL (GoHighLevel) EXPERTISE โžค GHL workflow automation (pipelines, triggers, actions) โžค CRM automation & lead management โžค GHL + API integrations (webhooks, custom APIs) โžค AI voice agent integration (Retell, Vapi) with GHL โžค SaaS mode setup & white-label systems โžค Funnel & automation optimization โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” ๐Ÿ BACKEND ENGINEERING โžค Python (FastAPI) โ€“ high-performance APIs โžค PostgreSQL with vector extensions (pgvector) โžค Async systems & background workers โžค Docker, cloud deployment (AWS/GCP) โžค Secure authentication (JWT, OAuth) โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” ๐Ÿ“ฆ WHAT YOU GET When we work together, you receive: โžค Production-ready AI agents and workflows โžค Clean, documented, maintainable code โžค Error handling, logging, and monitoring โžค Loom walkthroughs + written documentation โžค Systems built to scale from day one โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” ๐Ÿ“ˆ EXPERIENCE & RESULTS โžค 6+ years backend & SaaS development โžค 15+ successful Upwork projects โžค Top Rated | $2K+ earned โžค Built production AI agents, RAG systems, automation pipelines โžค Long-term partnerships with startups & agencies โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” ๐Ÿ› ๏ธ TECH STACK (by demand) High Demand (Lead with these): Python โ€ข LangChain/LangGraph โ€ข n8n โ€ข GoHighLevel โ€ข OpenAI/Claude API โ€ข RAG โ€ข Vector Databases (Pinecone/pgvector) โ€ข FastAPI โ€ข PostgreSQL Supporting: Laravel โ€ข Docker โ€ข AWS/GCP โ€ข Redis โ€ข React/Next.js โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” ๐ŸŽฏ INDUSTRIES I WORK WITH โžค AI-first SaaS startups โžค Marketing agencies (GHL users) โžค E-commerce & D2C brands โžค Real estate & PropTech โžค Healthcare & legal tech โžค Fintech & payment systems โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” ๐Ÿ“ฉ HOW WE START 1. You message me with your current challenge 2. I audit your system (AI / backend / GHL / n8n) โ€“ FREE 3. You get a clear, actionable roadmap 4. We build the right solution โ€“ the first time โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” Most developers just build features. I build systems that work reliably in production. ๐Ÿ‘‰ MESSAGE ME NOW FOR YOUR FREE AI / BACKEND / AUTOMATION ROADMAP โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ”โ” ๐Ÿ”‘ KEYWORDS (for Upwork algorithm): ai automation engineer, ai developer, virtual assistant, ai agent developer, n8n expert, python backend developer, gohighlevel expert, langchain, rag system, ai automation, workflow automation, ghl automation, agentic ai, llm integration, openai api, claude api, fastapi, vector database, multi-agent systems, production ai

  • Artificial Intelligence
  • Generative AI
  • AI Agent Development
  • n8n
  • HighLevel
  • Chatbot Development
  • OpenAI API
  • CRM Automation
  • API Integration
  • Automated Workflow
  • AI Bot
  • AI Chatbot
  • AI Platform
  • AI Development
  • Full-Stack Development
  • AI App Development
  • Automation
  • Business Process Automation
  • Lead Generation
  • Lead Generation Chatbot

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How much does it cost to hire a Open Source Developer?

Rates charged by Open Source Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a Open Source Developer in the United States on Upwork?

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Can I hire a Open Source Developer in the United States within 24 hours on Upwork?

Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive Open Source Developer proposals within 24 hours of posting a job description.