You will get AI automation, agent development, and ongoing support | Build & Maintain
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Top Rated
Project details
I will become your ongoing AI automation and agent development partner, helping you identify, build, improve, and maintain practical AI systems for your business.
You do not need an existing AI product, technical plan, or fully developed idea. We can begin with a specific automation you want built, an inefficient process you want improved, or a review of your business to identify where AI can save time, reduce manual work, and create new capabilities.
Depending on your priorities, I can build AI agents, multi-agent workflows, custom AI applications, MCP servers, business process automations, RAG and knowledge systems, API integrations, and supporting infrastructure. I can also evaluate models, reduce AI costs, troubleshoot existing systems, and provide ongoing technical strategy and maintenance.
This is a reserved-capacity retainer rather than a rigid, predefined project. We will maintain a shared backlog, prioritize the work with the greatest business value, and make consistent progress throughout the engagement.
You will receive senior-level product thinking and hands-on implementation from an expert dev with 15 years of experience building software and business systems.
You do not need an existing AI product, technical plan, or fully developed idea. We can begin with a specific automation you want built, an inefficient process you want improved, or a review of your business to identify where AI can save time, reduce manual work, and create new capabilities.
Depending on your priorities, I can build AI agents, multi-agent workflows, custom AI applications, MCP servers, business process automations, RAG and knowledge systems, API integrations, and supporting infrastructure. I can also evaluate models, reduce AI costs, troubleshoot existing systems, and provide ongoing technical strategy and maintenance.
This is a reserved-capacity retainer rather than a rigid, predefined project. We will maintain a shared backlog, prioritize the work with the greatest business value, and make consistent progress throughout the engagement.
You will receive senior-level product thinking and hands-on implementation from an expert dev with 15 years of experience building software and business systems.
AI Development Type
Deep Learning, Knowledge Representation, Model Tuning, Recommendation System, Software MaintenanceWhat's included
| Service Tiers |
Starter
$1,500
|
Standard
$2,500
|
Advanced
$4,000
|
|---|---|---|---|
| Delivery Time | 14 days | 28 days | 28 days |
Number of Revisions | 0 | 0 | 0 |
AI Model Integration | |||
Detailed Code Comments | |||
Knowledge Graph | |||
Model Documentation | |||
Ontology | |||
Source Code | |||
Taxonomy | - | - | - |
Frequently asked questions
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SC
Sean C.
Jul 22, 2026
Trafalgar Website
Len is really passionate about what he does and you will feel that when he makes you your website. 10 out of 10 experience.
ML
Mike L.
Jul 21, 2026
Contract Developer — Demo Integration & UI Polish (Sales Demo Focus) Confidential Project
Len was very easy to work with. Met deadlines and knows his stuff. A pleasure to work with and will do so again.
JG
Jake G.
May 27, 2026
Custom Hotel Booking App, Airbnb/Vrbo Sync, NextJS
Len exceeded all expectations building out our NEW customized website for our short term rental business. He has stayed on top of every timeline and addresses promptly. I love the fact that this new website frees up more of my time on the backend and automates other processes that are tailored for how we run our business making us more efficient. I highly recommend anyone looking to get a website built for any reason to use Len. His blend of creativity and tech savy knowledge is a diamond in the rough. Thank you Len!
FS
Frank S.
May 25, 2026
Proven Full-Stack Developer Needed for Sport-Centric Web App (React / Modern Stack)
Len did an amazing job on our web app. He has an immense sense in pride for his craft with great communication, fast turnaround, and excellent attention to detail. He was professional, easy to work with, and delivered exactly what we needed.
What really stood out was his ability to understand our vision quickly and turn it into a polished, functional product with very little back-and-forth needed. He consistently went above and beyond to make improvements, solve issues proactively, and ensure everything was running smoothly from both a technical and user experience standpoint.
Throughout the project, Len was reliable, organized, and highly responsive. He handled feedback thoughtfully, met deadlines consistently, and maintained a high standard of quality in every aspect of the work. It’s clear that he genuinely cares about delivering great results and building long-term client relationships.
If your looking for someone who not only builds out what you need but is alongside you as a 'strategic partner/advisor' - Len is your guy.
Highly recommend, and will definitely be looking into his services again in the near future.
What really stood out was his ability to understand our vision quickly and turn it into a polished, functional product with very little back-and-forth needed. He consistently went above and beyond to make improvements, solve issues proactively, and ensure everything was running smoothly from both a technical and user experience standpoint.
Throughout the project, Len was reliable, organized, and highly responsive. He handled feedback thoughtfully, met deadlines consistently, and maintained a high standard of quality in every aspect of the work. It’s clear that he genuinely cares about delivering great results and building long-term client relationships.
If your looking for someone who not only builds out what you need but is alongside you as a 'strategic partner/advisor' - Len is your guy.
Highly recommend, and will definitely be looking into his services again in the near future.
BP
Bob P.
May 11, 2026
Label Maker Web App With Dynamic Canvas & Mockups
Len K. is hands-down the best developer I have worked with on this platform. We brought him a complex project—a custom AI snack bag designer—and he produced an outstanding website that hit every single mark. It is rare to find a developer who is not only technically brilliant but also highly responsive and armed with a great eye for design. Len provided phenomenal design advice throughout the development process that made our product so much better than we originally envisioned. If you need a capable, reliable, and visionary developer, do yourself a favor and hire Len. He is the only choice.
About Len
Expert Web Developer & AI Specialist | Full Stack | Claude Certified
100%
Job Success
Oak Park, United States - 3:08 pm local time
I've scaled web apps to 300k users, navigated SEC enforcement, and built $10M/yr revenue engines. I specialize in product + software to design, build and ship robust platforms that drive real users and revenue.
Why am I on Upwork?
I’ve spent the last 10+ years building cutting edge products in web3 and fintech. Now, I am leveraging Upwork to expand my footprint and partner with founders in new verticals and industries. My goal is to deliver agency-grade results without the agency bloat.
Why work with me?
Many developers will build exactly what you ask for, even if there is a better, faster, or more profitable way to do it. My approach is different. While you know your business, I know the technology. I use my experience to take the lead on development, offering suggestions and improvements that you may not have thought of.
I am part of the Claude Partner Network and am a Claude Certified Developer (CCDV-F) from Anthropic.
-- Recent Highlights --
➞ Dusted .io: Online community for product marketers to prove their craft. Traditional social network engagement features like upvotes, comments, metrics, tagging, and notifications. AI interview chatbot with voice recognition helps users generate case studies and playbooks.
➞ AdminBRx/BringRx .com - Multi-tenant SaaS that enables 1-Click launch of Telehealth clinics for GLP1/Peptide treatments. Many integrations for payments (Stripe Connect), affiliates (Fanbasis), EHR and E-Prescribing, HIPAA compliance, GoHighLevel and FB Pixel tracking/webhooks, custom doc signing, and DNS deployment. Powering over 25 live clinics.
➞ DrySupplies .com - AI driven marketing automation for equipment rental business. Agents monitor real-time weather data to identify severe weather and flood zones, which dynamically triggers localized Google and Facebook ad campaigns and content generation.
➞ G2 Venture Partners (g2vp .com) - Replaced $15,000/year Affinity subscription with custom API & MPC server for relationship scoring and historical interaction context from millions of internal emails and calendar events across the entire organization.
➞ MyWatchLLC .com - Custom AI enabled business intelligence tools (monitoring, analysis, ideas, sales). Aggregating millions of monthly watch listings and sales data across several sources for price analysis and trends.
View more highlights on my portfolio website:
🔗 lk-dev .com
➞ Web Stack: Nextjs, React, Nodejs, TypeScript, Tailwind, SQL/Supabase, AWS, GCP, Vercel, Clerk, Stripe Connect, GHL
➞ AI Stack: OpenAI, Anthropic, Gemini, Vercel AI SDK, MCP, RAG, Vector Databases, Embeddings, AI Agents, AI Chatbots, OpenClaw, Hermes, Autonomous workflows
➞ Creative Stack: Framer, Three.js, React Three Fiber (R3F), P5.js, Canvas, Generative Art
➞ Web3 Stack: Bitcoin, Ordinals, Taproot, EVM, ETH, SOL, NFT, DeFi
Bottom line: I have the skills and experience necessary to build modern, high-fidelity web applications and AI systems from the ground up, across any industry.
Steps for completing your project
After purchasing the project, send requirements so Len can start the project.
Delivery time starts when Len receives requirements from you.
Len works on your project following the steps below.
Revisions may occur after the delivery date.
Kickoff
We will begin with a kickoff call to understand your business, current processes, pain points, and goals.
Opportunity and System Review
I will assess the proposed project, review your existing systems and/or identify high-value opportunities for AI automation.