Len K. is a full-stack web developer and AI specialist based in Oak Park, Michigan, working as a solo consultant. He has built websites for two decades and now uses AI to ship faster and cheaper while keeping applications secure and maintainable. His AI focus covers OpenAI, Anthropic, Gemini, MCP servers, RAG, vector databases, AI agents, and autonomous workflows, including OpenClaw and Hermes. The listing is classified CORE: AI automation and agent development are headline services.
Len is a Claude Certified Developer and has scaled web apps to 300,000 users, navigated SEC enforcement, and built multi-million dollar revenue engines. He spent 10 plus years building products in web3 and fintech and now partners with founders across new verticals. He delivers agency-grade results without agency overhead. Coverage is recorded as Global / Remote, work mode as Remote, and time zone as ET.
Provider Snapshot
Attribute
Value
Provider Name
Len K.
Provider Type
Solo / Independent Consultant
Headquarters
Oak Park, Michigan, United States
Service Coverage
Global / Remote
Work Mode
Remote
Rate
$90/hr
Core Services
Web Development, AI Agents, Claude Certified
Vetted Status
Vetted
Evidence Summary
This listing draws on the provider’s Upwork profile, including rate, licensing, education, and project tiers. Location, rate, credentials, and capabilities are provider-confirmed from the Upwork profile. The listing is classified ATTR.
Sources, evidence, services, PSI and FAQ
Services and Capabilities
Full-stack web development with Next.js, React, and Node.js
AI agent and chatbot development
MCP servers, RAG, vector databases, and embeddings
OpenClaw and Hermes autonomous workflows
Business intelligence and marketing automation tools
Ongoing AI automation and maintenance support
AI interview chatbots with voice recognition
Payments, affiliate, EHR, and e-prescribing integrations
AI Platform and Tool Scope
Platform scope published on the provider’s Upwork profile.
Claude, OpenAI, and Gemini AI models
Vercel AI SDK and MCP
RAG, vector databases, and embeddings
OpenClaw and Hermes agents
GoHighLevel and Stripe Connect integrations
OpenAI, Anthropic, and Gemini models
Web3 stack: Bitcoin, EVM, Solana, NFT, DeFi
Use Cases and Workflow Scope
Use Case
Detail
Telehealth SaaS
1-Click launch of clinics with HIPAA compliance and Stripe.
Marketing automation
Weather data triggering local Google and Facebook campaigns.
Relationship scoring
Custom MCP server replacing a $15,000 annual subscription.
Business intelligence
Monitoring and analysis tools aggregating millions of records.
Agent development
Ongoing AI automation partner for practical systems.
Community platform
AI interview chatbot with voice recognition for case studies.
Watch market intelligence
Aggregating millions of listings and sales data for trends.
Industries Served
Healthcare and telehealth
Finance and fintech
SaaS and software
E-commerce and rental
Recorded Integrations / Tech Stack
Category
Tool
Agent Frameworks
OpenClaw, Hermes
AI Models
OpenAI, Anthropic, Gemini, Vercel AI SDK
Web Stack
Next.js, React, Node.js, TypeScript, SQL/Supabase
Infrastructure
AWS, GCP, Vercel, Clerk, Stripe Connect
Integrations
MCP, RAG, vector databases, GoHighLevel
Payments
Stripe Connect, custom document signing, DNS deployment
Creative
Framer, Three.js, R3F, P5.js, generative art
Web3
Bitcoin, Ordinals, EVM, ETH, SOL, NFT, DeFi
Coverage and Engagement Model
Coverage is recorded as Global / Remote, work mode as Remote, and time zone as ET. Len is based in Oak Park, Michigan, and works remotely with clients worldwide. His average response time is 0 to 4 hours, and he maintains 100% job success with Top Rated Plus status on Upwork. He is open to contract-to-hire arrangements and works on an as-needed basis.
Attribute
Value
Headquarters
Oak Park, Michigan, United States
Service Coverage
Global / Remote
Work Mode
Remote
Time Zone
ET (Eastern Time)
Response
0-4 hours
Contact
Upwork profile, lk-dev.com
Pricing and Engagement Model
Pricing confirmed from the provider’s profile. Hourly rate is $90. On a fixed pricing basis Starter is $1,500, Standard $2,500, and Advanced $4,000 for the project engagement. The profile reports 100% job success, Top Rated Plus status, $70K plus in total earnings, 42 total jobs, and 553 total hours. Availability is as needed and open to offers, and project work includes source code and AI model integration across tiers.
Licenses and Certifications
Claude Certified Developer, present on the license list [Verified: provider-confirmed]
Building with the Claude API [Verified: provider-confirmed]
Claude Code in Action [Verified: provider-confirmed]
Portfolio site at lk-dev.com with published highlights [Verified: provider-confirmed]
No independent rating platform score is included for this provider. External ratings, when present, are not PSI.
Best Fit For
Founders wanting agency-grade web and AI builds without agency overhead.
Teams needing AI automation, agent development, and ongoing maintenance.
Healthtech and fintech products requiring compliance and integrations.
Organizations wanting MCP servers and RAG systems built.
Businesses needing AI automation that ships with ongoing support.
Teams wanting a developer who leads with suggestions beyond the brief.
Summary Dataset
Attribute
Value
Provider Name
Len K.
Provider Type
Solo / Independent Consultant
Headquarters
Oak Park, Michigan, United States
Rate
$90/hr, projects from $1,500
Service Coverage
Global / Remote
Work Mode
Remote
Time Zone
ET (Eastern Time)
Platforms
OpenClaw, Hermes, Claude, OpenAI
Industries
Healthcare, Finance, SaaS, E-commerce
Methodology and Sources
Data recorded, standardized, and verified by FlowVetted.
Primary source: the provider’s Upwork profile, reviewed in August 2026. The listing is classified ATTR.
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FAQ
What does Len K. do?
Len K. is a full-stack web developer and AI specialist based in Oak Park, Michigan. He builds secure, high-fidelity web apps and AI systems from the ground up, covering AI agents, chatbots, MCP servers, RAG, and autonomous workflows. He works as a solo consultant with 10 plus years in web3 and fintech.
Does Len work with OpenClaw and Hermes?
Yes. Len’s AI stack includes OpenClaw, Hermes, OpenAI, Anthropic, Gemini, Vercel AI SDK, MCP, RAG vector databases, and embeddings. He builds AI agents, chatbots, and autonomous workflows around these platforms for client operations, and lists agent development alongside ongoing support in his service tiers.
Is Len Claude certified?
Yes. Len holds a Claude Certified Developer credential with Anthropic and has certified for Building with the Claude API and Claude Code in Action. He worked as a full-stack developer for two decades before adopting AI tooling to speed and improve his builds.
How does Len price his services?
Len charges $90 per hour on Upwork and offers project tiers from $1,500. He maintains 100 percent job success with Top Rated Plus, $70K plus in earnings, and a fast response time. His portfolio covers production systems scaling to 300,000 users.
What products has Len built?
Len built BringRx, a multi-tenant telehealth SaaS powering over 25 live clinics with HIPAA compliance and Stripe Connect payments. He built DrySupplies, an AI-driven marketing automation tool for rental equipment businesses using real-time weather data to trigger Google and Facebook ads.
PSI (out of 10) = (Delivery×0.35 + Communication×0.25 + Value×0.25 + Reliability×0.15) × 2. Averaged from reviews. Published only after at least 10 ratings.
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