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I will build custom ai agents with n8n, vapi, crewai, langchain and python
Preston Zen
Level 1
5.0
5.0
About this gig
Custom AI Agents with n8n, Vapi, Zapier, Relevance AI, CrewAI & Python
Hey! Im a Full Stack AI dev from the SF Bay Area, building smart, scalable AI agents that do real work automate tasks, talk to users, fetch data, make decisions, and more.
Using tools like n8n, Vapi, Zapier, Relevance AI, CrewAI, and Python.
I build agents that:
- Intelligent chatbots
- Hold voice conversations (Vapi)
- Integrate with CRMs, Notion, Airtable, etc.
- Think with Relevance AI / CrewAI / Langchain
- Go beyond basic bots with real logic + actions
Whether you need a lead gen agent, support bot, internal ops tool, or something totally custom Ive got you covered.
I bring deep AI + dev experience, and I ship clean, production ready systems fast.
Lets turn your AI ideas into reality.
Message me with what you're building I'll make it happen.
How it works
Here are the steps to complete your Basic package project:
- 1
Video meetup We'll meet up by a video call to discuss your project face-to-face.
- 2
Research I map out your needs, learn about your application, and prepare a design for your application.
- 3
Design concept I'll design a concept for your app, which we can then develop together.
- 4
App spec I'll write specifications for the app's functionality and features.
- 5
First draft You'll get a first outline of the delivery to see how it aligns with your vision.
- 6
Development I'll develop the app and deliver a working product for your review.
- 7
Progress check We'll meet to review the status of the project and the steps required to complete it.
- 8
Final design I'll deliver the final design of the website/ app for your approval.
- 9
Final review I'll deliver the final version of the website or app for your review.
- 10
Delivery The delivery of the application.
Get to know Preston Zen
Preston Zen
Adaptive applications of the future
Level 1
- FromUnited States
- Member sinceMar 2018
- Avg. response time1 hour
- Last delivery4 months
Languages
English
🚀 Silicon Valley AI Engineer | Preston Zen
https://kaizenapps.com | https://portfolio.prestonzen.com | https://linkedtfin.com/in/prestonzen
From San Diego to the heart of Silicon Valley, I lead Kaizen Apps with a century of collective dev expertise. I specialize in AI-powered mobile/web apps, N8N automations, Twilio systems, and human-like Vapi Voice AI agents.
📞 Test my AI agent: +1 (760) 614 6290
From lean MVPs to enterprise AI, I architect systems that scale and drive revenue. I don't just code—I engineer competitive advantages. Let’s build the extraordinary. 🎯
My Portfolio
FAQ
How long does an AI application take to develop?
Depending on the specificity of the idea, how many prepared code and media files there are, and the speed of communication between progress checks, it can be done as soon as a few days to as long as a few months.
Reviews
12 reviews for this Gig
| (11) | ||
| (1) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
P peterloehfelm
United States
Preston is one of those rare "golden nuggets" found in today's noisy technical world. He has all the needed background skills and has honed them in impressive locations around the globe. We highly recommend him if you want technology support at the highest level out there. Preston and his team are...
$100-$200
Price
5 days
Duration
Helpful?B bluerock606
Australia
I am absolutely blown away by the quality and professionalism of this service! From start to finish, the entire experience was seamless and impressive. The AI agent delivered was exactly what I needed and more. The seller demonstrated deep technical expertise and took the time to understand my specific...
$100-$200
Price
4 days
Duration
Helpful?M mariocastejon
Mexico
Made my project come to life, he had a very clear communication and helped me understand along the way.
$50-$100
Price
11 days
Duration
Helpful?J juulrbv
Repeat Client
Netherlands
Preston Zen truly SHINES in AI Development! With flawless professionalism, he exceeded expectations, delivering top-tier work while maintaining quick responsiveness. Collaborating with him was a joy as he went above and beyond, making the project experience seamless and enjoyable. 👏
$800-$1,000
Price
7 weeks
Duration
Helpful?A apodeictic
United States
Super helpful. Exactly what I was looking for. Opened up a lot of paths for me to continue my own work. Really appreciate the context given, which was the exactly why I wanted to talk to a real person vs. just trying to find the answers on my own.
Up to $50
Price
3 days
Duration
Helpful?
Reviews
12 reviews for this Gig
| (11) | ||
| (1) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
P peterloehfelm
United States
Preston is one of those rare "golden nuggets" found in today's noisy technical world. He has all the needed background skills and has honed them in impressive locations around the globe. We highly recommend him if you want technology support at the highest level out there. Preston and his team are...
$100-$200
Price
5 days
Duration
Helpful?B bluerock606
Australia
I am absolutely blown away by the quality and professionalism of this service! From start to finish, the entire experience was seamless and impressive. The AI agent delivered was exactly what I needed and more. The seller demonstrated deep technical expertise and took the time to understand my specific...
$100-$200
Price
4 days
Duration
Helpful?M mariocastejon
Mexico
Made my project come to life, he had a very clear communication and helped me understand along the way.
$50-$100
Price
11 days
Duration
Helpful?J juulrbv
Repeat Client
Netherlands
Preston Zen truly SHINES in AI Development! With flawless professionalism, he exceeded expectations, delivering top-tier work while maintaining quick responsiveness. Collaborating with him was a joy as he went above and beyond, making the project experience seamless and enjoyable. 👏
$800-$1,000
Price
7 weeks
Duration
Helpful?A apodeictic
United States
Super helpful. Exactly what I was looking for. Opened up a lot of paths for me to continue my own work. Really appreciate the context given, which was the exactly why I wanted to talk to a real person vs. just trying to find the answers on my own.
Up to $50
Price
3 days
Duration
Helpful?
