You will get LLM App API and Backend Build
Project details
You'll get a production-ready LLM API backend — built, tested, and deployed to your infrastructure.
I build LLM-powered APIs for startups and product teams who need a reliable backend, not just a script. Whether you're adding AI features to an existing app or building a new product on top of OpenAI, Anthropic, or open-source models, I deliver clean, maintainable code that actually ships.
What you'll receive:
• REST API with LLM endpoints (streaming + standard)
• Tool use / function calling support
• Error handling, retries, and rate limit management
• Environment setup and documented configuration
• Source code with inline documentation
I've shipped production LLM systems including a voice receptionist handling 46+ calls/day and a real estate deal analysis engine processing broker submissions end-to-end. Same engineering rigor applies here.
I build LLM-powered APIs for startups and product teams who need a reliable backend, not just a script. Whether you're adding AI features to an existing app or building a new product on top of OpenAI, Anthropic, or open-source models, I deliver clean, maintainable code that actually ships.
What you'll receive:
• REST API with LLM endpoints (streaming + standard)
• Tool use / function calling support
• Error handling, retries, and rate limit management
• Environment setup and documented configuration
• Source code with inline documentation
I've shipped production LLM systems including a voice receptionist handling 46+ calls/day and a real estate deal analysis engine processing broker submissions end-to-end. Same engineering rigor applies here.
AI Algorithms
Large Language Model, Transformer ModelAI Applications
Conversational AI, Natural Language UnderstandingAI Models
AlphaCodeWhat's included
| Service Tiers |
Starter
$499
|
Standard
$999
|
Advanced
$2,499
|
|---|---|---|---|
| Delivery Time | 1 day | 3 days | 7 days |
AI Model Integration | |||
Batch Normalization | - | - | - |
Database Integration | - | - | - |
Detailed Code Comments | - | - | - |
Image Upscaling | - | - | - |
MLOps | - | - | - |
Model Deployment | - | - | - |
Model Documentation | |||
Model Monitoring | - | - | - |
Model Testing & Optimization | - | - | - |
Model Tuning | - | - | - |
Natural Language Processing | - | - | - |
NLP Tokenization | - | - | - |
Pre-Training | - | - | - |
Prompt Engineering | |||
Setup File | - | - | - |
Source Code |
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CD
Chris D.
May 21, 2026
Deal Desk broker analysis model
Andriy is a stud. Jumped on my project, and completed it well ahead of schedule. Provided great communication, as well as his own thoughts on areas for improvement. Overall I ended up with a much better product. I'd love to have Andriy on my team full time.
SW
Selma W.
Mar 7, 2022
From Scratch Full Stack Dynamic Website Architect Needed
Andy helped create a react native prototype for a travel app built from conversations and hand drawn sketches. Andy was great at helping identify the most impactful features to prioritize and has a positive can do attitude. I’d hire him again.
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Jul 16, 2021
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Mark B.
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About Andriy
US-Based AI Developer | Custom Agents, LLM Apps & Automation
Aventura, United States - 5:55 pm local time
Recent builds:
- AI receptionist handling 46+ inbound calls/day for a home services business — custom voice agent + CRM integration, fully autonomous routing and booking. $8K/month new revenue.
- Broker analysis AI — multi-stage LLM pipeline that processes deal briefs, applies underwriting logic, and outputs scored analysis. Built on Cloudflare Workers + D1, shipped to production.
- Lead enrichment pipeline — Clay + n8n + custom Node.js middleware, processing 500+ records/day with idempotency and error recovery.
What I build:
- Custom AI agents with tool-calling, memory, and multi-step reasoning (Claude, OpenAI, Workers AI)
- RAG systems, LLM applications, and AI-powered backends
- Production APIs and event-driven architectures: Cloudflare Workers, Node.js, Python
- Webhook-driven pipelines, async queues, real-time data flows
- CRM and platform integration when it's the output, not the whole job
Platforms I use as tools (not my identity): GoHighLevel, HubSpot, n8n, Make, Zapier, Airtable, Shopify, Twilio.
MS in Computer Science, UC Berkeley. 10+ years building production software. US-based, Miami FL.
Steps for completing your project
After purchasing the project, send requirements so Andriy can start the project.
Delivery time starts when Andriy receives requirements from you.
Andriy works on your project following the steps below.
Revisions may occur after the delivery date.
Architecture & Setup
I review your requirements, design the API structure, and set up the project with dependencies and environment configuration.
API Build & Integration
Build the LLM endpoints, streaming handlers, tool use, error handling, and integrate with your chosen provider.