N8n Automation / Integration Engineer (PostgreSQL)

Hello! I have significant experience in developing complex automation systems on n8n and deep knowledge in working with relational databases (PostgreSQL). I specialize in creating fault-tolerant workflows, optimizing SQL queries, and integrating AI into business processes.

1. Examples of my workflows on n8n:

AI-Travel Agent (Human-in-the-Loop): A complex automation that collected customer wishes, searched for tickets/hotels, and generated professional HTML proposals. The system included a human moderation stage, which required clear logic for checking data states in the database.

SEO and content automation: A Telegram bot for mass generation and distribution of SEO product descriptions. I set up data streaming and API integration for seamless content generation.

Integration of Retell AI + KommoCRM: A voice qualification system for leads. I implemented the full cycle: from the outbound call to automatic lead classification and transferring transcriptions and metadata to the CRM and relational database.
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2. Example of integration with AI/GPT:

I use AI for lead classification and entity extraction. In projects, I configure GPT for text/dialogue analysis: the model receives data, performs analysis, and returns structured JSON for correct database entry.

I developed RAG agents for education: integrated n8n with the Pinecone vector database to provide answers based on the company's internal training materials.

3. Technology stack:

Automation: n8n (Expert, self-hosted), Make.

Databases: PostgreSQL (strong SQL, working with structure, complex JOINs, aggregation), Airtable, Pinecone.

AI: OpenAI API (GPT-4), Gemini, DeepSeek, Claude, Retell AI.

API: REST API, Webhooks, JSON, Google API.

4. Rate:

$11 – $17 / hour (depending on the volume and complexity of tasks).

5. Availability:

30–40 hours per week. Ready for full-time engagement, async format, and quick response to tasks.

I can independently debug complex workflows, optimize SQL queries, and quickly understand the technical documentation of new services. I am ready to complete a test task.

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Good day.
Our team has many years of experience in developing ERP, CRM, CMS, and specialized software for businesses. We create effective digital solutions that help automate processes, increase productivity, and scale companies.

We work with modern technologies — from bots and scripts to AI agents and analytical systems. We develop websites of varying complexity. In our portfolio, we have implemented ERP solutions for the hotel business, as well as for companies engaged in the import and sale of goods, and our own product XFitness — an ERP system created specifically for fitness clubs.

We are ready to implement your project and offer the best solution tailored to your needs.
Our portfolio: Freelancehunt

We specialize in the following areas:
… - Development of ERP Systems
- Development of CRM Systems
- Development of Websites of any complexity
- Development of CMS Systems
- Support for Websites
- Development of OpenCart
- Support for OpenCart
- Modification of OpenCart
- Refinement of OpenCart
- Development of WordPress
- Support for WordPress
- Modification of WordPress
- Refinement of WordPress
- Development of ECommerce
- Support for ECommerce
- Modification of ECommerce
- Refinement of ECommerce
- Development of Web Applications
- Support for 1C Servers
- Support for Web Servers
- Development of mobile applications
- Data parsing
- Development of bots
- Development of AI agents

and on the following technologies:
- Python
- PHP
- Laravel
- Symfony
- Yii2
- JS
- NodeJS
- jQuery
- TypeScript
- MySQL
- HTML
- CSS
- Vue
- Nuxt.js
- React
- React Native
- C++

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Hello!
I am interested in your project, as it is very close to what I have been working on for many years — business process automation, integrations, data handling, and APIs.

Briefly about my background

— 6+ years of commercial experience in enterprise development (Java)
— Main focus: process automation, system integrations, data handling, stability, and support of existing solutions
— Experience with n8n is not very extensive, but the logic of workflows, triggers, data processing, debugging, and optimization are very clear to me due to many years of experience with Business Process Management, integration services, and message-driven architectures

… SQL / PostgreSQL

— 6+ years of active work with SQL, particularly PostgreSQL
— Designing and modifying database structures
— Query optimization, indexes, complex JOINs, aggregations
— Working with large volumes of data
— Refactoring and supporting existing SQL queries in production

API / integrations / webhook

I have extensive practical experience in integrations:
— REST API (creation, integration, versioning)
— Webhooks (incoming/outgoing, retries, idempotency)
— JSON / JSON Schema
— Integrations between CRMs, billing systems, third-party services, internal systems
— Working with auth (API keys, OAuth2, JWT)

These were real enterprise projects where automation, stability, and proper error handling are critically important.

Debugging:
— Strong experience in debugging production systems
— Analyzing logs, incorrect workflows, race conditions, data issues
— Quickly identifying the causes of errors and fixing them without "breaking — looking"

Examples of workflows in n8n:

RAG system for a distribution company:

A distributor of semi-finished products, clients are retail stores.
Workflow functionality:
— Incoming client requests (text or voice) via webhook
— Voice recognition through OpenAI API
— Processing and normalizing the request
— Searching in a vector database (contracts, price lists, internal company documentation)
— Forming context (RAG)
— Requesting OpenAI to generate a response
— Returning a structured response to the client (text + metadata)
— Logging requests in PostgreSQL
Tasks it solves:
— Quick access for clients to current contracts and price lists
— Consultations without burdening managers
— A single channel for working with documentation

Stack:
— n8n (self-hosted)
— Docker / Docker Compose
— OpenAI API
— SQL: PostgreSQL
— NoSQL (MongoDB / Redis — at the level of integrations)
— Java
— REST API / Webhooks
— Git
— Linux

— Rate: 500 UAH / hour
— Availability: 5–8 hours a day
— Format: async, long-term
— Ready to start

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Hello. I have experience with n8n/Node.js. I am ready to collaborate. Contact me!

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Hello! I have enough experience working with the n8n service, databases, various AI models, integrating necessary services through APIs and Webhooks. As an example, I can mention automated lead collection from Google Maps into spreadsheets and their processing using n8n and AI, creating chatbots with AI and integrating AI into already existing bots. Let me know if you are interested in this offer.

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Hello, Anastasia!

Overall, the request is clear.
I have a lot of experience working with databases, AI, Looker, marketing automation, Docker, and much more.

Recent developments include:
- A product name parsing system and reporting through AI
- An AI chatbot for a company that makes custom paintings (integration of AI and WhatsApp)
- A system for creating workspaces in Jira, Miro, Trello (without AI, just automation)
… - An AI agent as an internal assistant for the company (knows business processes, helps quickly find answers to questions)
- SEO reports (automation of data retrieval from Google Ads and distribution of data across various tables)
- Article generation for the website's blog on WordPress + integration with Search Console
- A system for monitoring and evaluating the quality of managers' calls

In general, a lot has already been developed. Over 25 years, more than 100 automations.
I can work with virtually any stack because I previously worked as a developer, so I know both front-end and back-end well. For many systems, I create web shells for convenience in configuration and management.
I won't specify a rate, as I always evaluate on a project basis. There may be certain technical difficulties. I allocate additional time for them to ensure deadlines are not shifted, and I do not want to impose costs on the client.
Availability can be significant, as I delegate some tasks to assistants (staff). Overall, I have managed to work around 130 productive hours per week. However, I have many projects, so currently, I can dedicate 35-40 effective hours per week, and when we get accustomed and you have a larger demand, I can provide more.

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