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I will build custom ai agent develop saas app langchain developer API integration n8n
Alexander
About this gig
Need a custom AI agent built into your SaaS app, or an API integration
that just works? I build production-ready AI automation systems using
LangChain, Claude Code, and n8n backend included.
What I deliver:
- Custom AI agent development integrated into your SaaS or backend
- API integration connecting your app to OpenAI, Claude, or custom
- endpoints
- LangChain and LangGraph-based agent workflows
- n8n automation workflows connecting your tools and data
- FastAPI backend development for AI-powered apps
- Fixing broken API integrations or slow AI backends
- Database integration so your agent reads and writes real data
Why buyers choose me:
Computer Science background plus hands-on experience as a LangChain
developer building real AI agents, not templates. I work in Python,
Node.js, and FastAPI, deploying on Docker and AWS when needed. Whether
you are building a new OpenAI assistant or need a custom workflow
automated end-to-end, I get it working right the first time.
Message me your project details before ordering so I can confirm scope
and timeline no surprises, no delays.
Let's build something that actually works.
Get to know Alexander
Alexander
Enterprise AI Agents, Voice Bots And Custom Automations That Scale
- FromCanada
- Member sinceJul 2026
- Avg. response time1 hour
Languages
English, German, French, Spanish, Portuguese
I build and repair AI-driven "second brain" systems Obsidian vaults wired to autonomous agents via MCP servers, n8n workflows, and Claude Code. I specialize in fixing broken Vibe Coded automations, deploying 24/7 self-hosted agent dashboards, and connecting local LLMs to real productivity pipelines. Background in automation engineering and AI agent orchestration. I deliver working systems, not templates tested, documented, and stable in production. Let's turn your scattered notes into an agent that actually works for you.
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Other AI Development Services I Offer
FAQ
What's included in the custom AI agent build?
A fully functional AI agent using LangChain, integrated into your SaaS app or backend, tested and connected to your chosen AI model (OpenAI, Claude, etc).
Can you integrate AI into my existing app?
Yes. Send me your app's stack and what you want the AI to do I'll connect it via API without disrupting your existing codebase.
Do you work with LangGraph or Make.com too?
Yes, alongside LangChain and n8n I also use LangGraph for complex agent flows and can integrate Make.com if it fits your stack better.
What backend languages do you use?
Primarily Python and FastAPI, with Node.js when needed. I'll confirm the best fit for your project during scoping.
Can you fix a broken or slow AI integration?
Yes. Share your codebase or repo access and I'll diagnose the bottleneck or bug, fix it, and explain the root cause.
Do I get the source code?
Source code is included in Standard and Premium packages, with detailed comments in Premium for easier handover.
How long does delivery take?
Basic: 2 days. Standard: 5 days. Premium: 8 days. Exact timeline confirmed after I review your project scope.
Do you offer revisions?
Yes, revisions are included per package tier. Scope changes beyond the original brief are quoted separately.
Can you deploy this on AWS or Docker?
Yes, I deploy backend systems using Docker and AWS when your project needs a scalable, production-ready setup.
What do you need from me to get started?
Your app's current stack, the AI model you want integrated, and a brief description of what the agent should do.
