AI Systems Architect — n8n + LLM Agent Builds (Individual freelancers only)

@kishanbwts

I understand you need a detailed Loom walkthrough, but here’s a clear, practical approach to your questions. For the Loom, I’ll show my most complex n8n workflow handling multi-step error handling with modular sub-workflows, webhook triggers, and dynamic context passing. This example highlights clean architecture with reusable components, matching your complexity needs. To call Claude API from n8n, I use an HTTP Request node with OAuth authorization. I send the document text plus a prompt focused on extracting structured data fields. The response is parsed with a function node to enforce a consistent JSON schema—catching any missing fields and normalizing formats before output. For per-client memory, I build isolated Google Sheets to hold context profiles updated after reviewer feedback. n8n polls sheets or listens to submission webhooks, appends corrections, and dynamically loads that updated context into Claude API calls. This creates a continuously learning system, client by client, with strict credential segregation. Given scope and iteration, my rate for a 150–200 hour build is $12,000, with a $1,500 monthly retainer for updates, monitoring, and new clients onboarding. Ready to start your walkthrough video and dive into building robust, modular, multi-tenant AI automation systems as you grow.

@TechizeBuilder

Hi, I came across your project "AI Systems Architect — n8n + LLM Agent Builds (Individual freelancers only)" and I'm confident I can help you with it. About Me: I'm a agency owner with over 8+ years of experience in PHP, JSON, REST API, OpenAI. , and I understand exactly what’s needed to deliver high-quality results on time. Why Choose Me? - ✅ Expertise in required Technologies and 1 year post deployment free support - ✅ On-time delivery and excellent communication - ✅ 100% satisfaction guarantee Let’s discuss your project in more detail. I’m available to start immediately and would love to hear more about your goals. Looking forward to working with you! Best regards, Deepak

@MQamar123

As a IT professional with over 7 years of experience, my abilities extend far beyond the basic definition of 'developer.' Choosing me as your technical partner would mean gaining access to a profound understanding of industry-leading technologies, such as n8n, REST API, Claude API, and others. I have expertly implemented these tools across my varied projects and am more than capable of constructing and maintaining complex architectures with the utmost efficiency and accuracy. More than just a developer, I'm your long-term solution provider who thrives on building clean, documented and production-ready workflows every time anew precisely because no two clients emphasize their needs similarly. Rest assured; your investment in me isn't restricted to immediate returns; it includes consistent work, clear briefs, timely payments, and a retainer that grows alongside our clientele expansion. Through application-oriented thinking clubbed with dedication towards meeting client's expectations; I ensure that every aspect of your projects receives the attention they deservedly demand.

@mayankinnovative

Hi, As per my understanding: You need a long-term technical partner to design and maintain complex, production-grade AI automation systems for multiple clients. Each build must be custom, scalable, and isolated per client, with strong n8n architecture, advanced LLM integration, structured data handling, and reliable API-based operations. Implementation approach: I will design modular n8n workflows using sub-workflows, robust error handling, and webhook-based triggers to ensure scalability and maintainability. For AI processing, I’ll integrate OpenAI/Claude APIs with structured prompt engineering to produce consistent JSON outputs for extraction and categorization. I’ll implement per-client memory systems using structured data stores (Sheets/DB) with dynamic context injection and feedback loops for continuous learning. Secure multi-tenant architecture will isolate credentials using OAuth2 and environment-based configs. Additionally, I’ll handle REST write operations, Google Workspace automation, and optional accounting integrations with clean documentation for each build. A few quick questions: 1. Do you prefer Claude, OpenAI, or hybrid usage per use case? 2. Where should client memory persist—Sheets, DB, or custom storage? 3. Any preferred hosting environment for n8n (self-hosted/cloud)? 4. Expected concurrency/load per client system?

@nadeemkhan7

Hello, I went through your project description and it seems like that I am a great fit for this job. I have an expert team with many years of experience in PHP, Java, Software Architecture, JSON, REST API, OpenAI, AI Development, n8n. Lets connect in chat so that we discuss further. Regards

@hr157

Hello, With 13 years of experience in AI development, automation, and system integration, I specialize in building complex, production-ready n8n workflows, advanced prompt engineering with Claude/OpenAI APIs, and structured multi-client automation systems. I excel at per-client context profiles, automated learning from human corrections, and secure REST API integrations—including Google Workspace and financial platforms like QuickBooks Online. Deliverables: Fully documented n8n workflows, structured JSON outputs from AI agents, isolated multi-tenant client systems, and ongoing maintenance support. Why hire me? My technical depth, attention to clean architecture, and commitment to long-term collaboration ensure scalable, reliable, and efficient automation solutions. Best regards

@ahmetTC

Hope you are doing well! Your requirement for a long-term technical partner to build production-grade AI automation systems using n8n, Claude/OpenAI APIs, REST integrations, and Google Workspace is clearly understood. Potential challenges include maintaining multi-tenant architecture, handling OAuth credential isolation per client, ensuring reliable webhook/error handling in complex n8n workflows, and achieving consistent structured JSON outputs from LLM processing. Strong experience includes building modular n8n architectures with sub-workflows, webhook triggers, retry/error queues, and API orchestration for CRM, finance, and document automation systems across multiple industries. In similar projects, issues such as inconsistent LLM outputs and workflow failures were resolved through strict prompt schemas, validation nodes, fallback logic, and structured JSON parsing layers to ensure stable production automation. Per-client context systems were implemented using dedicated databases and dynamic context loaders so AI agents maintain memory, learn from reviewer corrections, and update operational rules automatically. I know what do I build for you, can complete it to your full satisfaction within your timeline. I am ready for you and waiting here. Thank you.

@adityakhuman006

My name is Adityakhumar, and I want to be your long-term technical partner for AI system architecture. My expertise in complex architecture, error handling, webhook triggers, and modular design makes me the ideal candidate to build and maintain the unique systems you require. I bring diverse skills to the table, including proficiency in n8n, Claude API or OpenAI, AI agent architecture, REST API (with write-access operations), and Google Workspace. Regarding multi-tenant system design, I understand the importance of maintaining separate builds per client for isolated credentials and data. In line with your requirement for cross-industry automation experience, I have built solutions for various verticals - a testament to my adaptability and desire to deliver tailored results. Perhaps most crucially, my approach aligns perfectly with your need for a committed partner who can create clean, documented, and production-ready workflows every time – research is something that comes second nature to me. A particularly relevant project I can proudly highlight was a robust backend system which streamlined financial data between platforms - akin to your demand of QuickBooks Online or Xero write-access API familiarity.

@amaank66

Hello, Your Laravel-based healthcare CRM aligns well with our experience in modernizing complex systems with a focus on usability, scalability, and performance. **Our Approach:** **1. Technical Completion** We’ll audit the current system, fix bugs, optimize performance, and ensure clean, maintainable Laravel architecture across all modules. **2. UI/UX Redesign** Design a modern, intuitive UI (Figma-based) tailored for healthcare workflows—prioritizing speed, clarity, and ease of use for staff. **3. Workflow Optimization** Streamline user journeys across modules (patient care, scheduling, billing, etc.) to reduce operational complexity. **4. Mobile Experience** • Responsive Web: Included • Fully optimized mobile UX (separate layout): Delivered as an extended phase **5. AI Integration (Optional)** • Smart documentation assistance • Auto-generated reports • Workflow automation & recommendations **Tech Stack:** Laravel + Vue/React, REST APIs, MySQL/PostgreSQL, optional AI via OpenAI/Claude **Timeline (Est.):** • Audit & Stabilization: 2–3 weeks • UI/UX + Core Improvements: 4–6 weeks • Mobile + AI Enhancements: 3–4 weeks **Why Us:** We’ve delivered CRM/ERP systems with complex workflows and focus on clean code, scalability, and long-term support. We’re committed to being a reliable, long-term partner and can share relevant work samples on request. Best regards, Amaan Khan P. CUBEMOONS PVT LTD.

@abdf2010

Hey, I noticed your project, AI Systems Architect — n8n + project and believe I can help. My work in PHP has prepared me well for this kind of project. Looking forward to hearing your thoughts.

@strdmgrblr

I’m excited to help you build intelligent automation systems that grow with your business and serve clients across industries. We’ve designed complex, scalable workflows that are clean, modular, and documented, ensuring seamless integrations and automated processes. I bring strong off-platform experience in advanced prompt engineering with Claude API and sophisticated n8n architectures involving sub-workflows and error handling. I’m comfortable managing multi-client REST API write operations and OAuth 2.0 credentialing, aligned with your need for reliable and user-friendly automation. Key skills include AI agent architecture, structured data extraction, and multi-tenant system design. We can chat more about your goals and specifics. Let’s make automation fun and flawless. Let's have a chat, Alicia

@Hemantt841

Hi, I see you’re looking for a long-term technical partner to build and maintain complex AI automation systems using n8n and LLM agents like Claude or OpenAI. Your focus on modular workflow architecture, advanced prompt engineering, and multi-client context profiles really stands out as a precise and challenging scope. You need clean, production-ready workflows with advanced error handling, OAuth 2.0 write-access operations, and dynamic Google Workspace integration. I understand the importance of building unique, isolated systems per client with structured data extraction and automated learning from human feedback, which aligns perfectly with your requirement for multi-tenant system design and cross-industry automation. I’ve built several complex n8n workflows incorporating sub-workflows, error handling, and webhook triggers, integrating OpenAI for structured JSON outputs from documents. I designed multi-client context-aware AI agents that update memory profiles based on user corrections, all managed within n8n’s modular framework. These projects included dynamic OAuth 2.0 credential management and write-access API operations for Google Workspace and QuickBooks Online. I can deliver the initial 150–200 hour build within 6 weeks and am prepared to provide ongoing maintenance under a retainer model as your client base grows. I’m ready to dive deeper into your project and discuss how to tailor the system to your exact needs.

@mohammedj95

Hello There, I have 12+ years of experience in full-stack development and AI automation, and I’m interested in working as your long-term technical partner. Experience n8n: Complex workflows, sub-workflows, error handling, webhooks OpenAI / Claude API: Structured data extraction, prompt design, consistent JSON output APIs: OAuth 2.0, write operations, multi-client setups Google Workspace: Drive, Sheets, Gmail automation Experience with multi-client (multi-tenant) systems Approach I will build clean, well-structured, and production-ready workflows for each client (no templates), with a focus on reliability and scalability. Your Questions 02 – Claude API in n8n Use HTTP request with structured prompts, enforce JSON format, and validate output before saving. 03 – Client Memory System Store client data in a database, use it in prompts, and update automatically based on user corrections. Monthly retainer: Open to discussion I understand this is a long-term role, and I’m ready to grow with your business. I can share a Loom walkthrough of my work in the next step. Best regards, Mohammed J.

@tamannarajput18

As someone who specializes in full-stack development and workflow automation using n8n, I have extensive experience in creating complex architecture just as you require. I am not only proficient in basic linear flows, but I also possess strong skills in sub-workflows, error handling, webhook triggers, and modular design, which are crucial for your project. Moreover, my proficiency with REST API and OAuth 2.0 will aid tremendously in managing multi-client credentials and write operations. Additionally, my expertise extends to Google Workspace tools like Drive, Sheets, and Gmail - ensuring structured data management and dynamic context loading. Moreover, I am well-versed with using Claude API or OpenAI for advanced prompt engineering and structured-database extraction. As you mentioned the need for customized multi-tenant system designs to facilitate isolated credentials and data for individual clients — I can meet that requirement comfortably. Furthermore, my experience of working across industries reflects my ability to build robust solutions irrespective of verticals.

@shailender18

Hi,I am an independent developer specializing in n8n orchestration and LLM agent architecture. I focus on building robust, self-healing workflows rather than simple API calls. ​Technical Expertise: ​n8n: Advanced sub-workflows, custom JS nodes, and error-handling. ​AI: Tool-calling agents, RAG (Pinecone/Supabase), and prompt engineering. ​Systems: PostgreSQL/Redis for memory management and state tracking. ​ ​I don't just connect apps; I architect agentic loops that handle real-world edge cases. I work solo, respond fast, and deliver clean, documented workflows that you can actually maintain. ​Would you like to see a quick loom video of a multi-agent n8n system I recently deployed? ​Best, Shailender

@skolarai

I've built n8n systems with nested sub-workflows and webhook orchestration for clients handling 50k+ daily transactions—the modular approach matters when scaling. You mention needing someone who understands system architecture beyond linear flows; most builders don't think about error recovery or state management across workflows, which is where things break. What's your typical workflow complexity—are we talking multi-step agent loops with LLM decision points, or more sequential automation with conditional branching? Let me know if you want to discuss the technical approach.

@gsinfotechopcp4

At GSINFOTECH OPC Pvt. Ltd., we recognize what it takes to transform entrepreneurial ideas into powerful, successful digital products. With hands-on experience in AI development, Java, and PHP, plus utilizing modern and scalable technologies like React JS, Node JS, MongoDB and more; your need for a skilled individual capable of breathing life into complex architectures matches my expertise perfectly. To demonstrate my capabilities in n8n, I am ready to provide a detailed Loom walkthrough of one of the most intricate workflows I've built, showcasing both my comprehension of the system itself as well as an understanding of the objectives behind it. Additionally, envisioning how I'd call Claude API to extract structured data from documents and integrate consistently with JSON won't be a problem. My proficiency with the Prompt Engineering side will streamline this process.

@Sudhi190

As an AWS Certified Full-Stack Developer with a passion for creating innovative and scalable solutions, I am highly skilled in the areas that your project demands. From writing complex architectures in n8n, managing REST APIs and OAuth 2.0, to working with Google Workspace platforms like Drive, Sheets, Gmail, I have done it all. Furthermore, my proficiency extends to designing and building AI agent architectures with per-client context profiles that automate learning from human corrections. This aligns perfectly with your objective of creating fresh builds for each client. In addition to these requirements, I offer valuable expertise in developing multi-tenant systems with isolated credentials and data for different clients—a crucial skill for maintaining the integrity and confidentiality of your business. Moreover, my cross-industry automation experience ensures that I can cater to your needs regardless of the industry vertical. Lastly, I understand that this is a long-term engagement and not a one-off project. With my strong communication skills and systematic approach to completing tasks within deadlines, you can trust me to deliver consistently high-quality work; no reused systems or templates! Choosing me as your technical partner means getting more than just a freelancer, but also a teammate who's committed to your project's success. Indulge me the opportunity and let's build something impactful together!

@techwagger

This is exactly the kind of work I’m looking for—serious, long-term system building with clean architecture, not quick hacks. From your description, you don’t just need workflows, you need *scalable, client-isolated automation systems* that actually hold up in production. I’ve built complex n8n setups with modular sub-workflows, retry logic, and webhook-driven pipelines—especially where AI + APIs + structured data all intersect. **How I’d approach your requirements:** * **Claude via n8n (structured extraction):** Use HTTP node → send document content with a strict prompt + JSON schema → enforce response format using validation node → fallback/retry on malformed outputs → optional post-processing for normalization. * **Per-client memory system:** Each client gets a dedicated data store (Sheets/DB) holding context + history → dynamically injected into prompts → reviewer corrections captured via webhook → stored + appended → used to refine future outputs (feedback loop). * **System design:** Fully modular workflows (input → processing → validation → output) Credential isolation per client (OAuth + environment separation) Clear documentation + handover-ready builds **Relevant experience:** I’ve built multi-step AI automation systems combining APIs, structured outputs, and human-in-the-loop correction—used for operations, lead processing, and internal tooling. If you’re building this as a long-term engine, I’m in. Let’s talk.