🟢 100+ successful projects | Top Rated Plus | 10+ years of experience 🟢
I help businesses collect reliable data, automate workflows, integrate APIs, and build AI-powered systems that reduce manual work and turn messy processes into clean, scalable, production-ready solutions.
I’m Sergii, Senior Automation & AI Engineer at DataOx. For 10+ years, we’ve helped startups, small businesses, and growing teams build custom data extraction systems, workflow automation tools, API integrations, backend platforms, data pipelines, and practical AI automation solutions.
What I can help you with:
• Web scraping & data extraction
Custom scraping systems for websites, marketplaces, directories, eCommerce platforms, real estate platforms, job boards, online portals, social networks, and other public or structured data sources.
• Data processing & data pipelines
Cleaning, structuring, normalizing, transforming, and preparing data for reporting, analytics, dashboards, CRMs, databases, Google Sheets, Airtable, internal tools, or AI systems.
• Workflow automation & browser automation
Automation systems that replace repetitive manual work, connect tools, handle business logic, run scheduled processes, and reduce operational workload over time.
• API integration & backend systems
REST API integrations, third-party API connections, custom API development, backend logic, database workflows, admin panels, internal platforms, and scalable business systems.
• AI automation & AI-powered tools
AI agents, ChatGPT / OpenAI API integration, Claude, Gemini, AI-driven workflows, document processing, natural language interfaces, AI-generated reports, classification, extraction, and decision-making support systems.
• Existing system improvement
Bug fixing, refactoring, stabilization, performance improvements, error handling, documentation, feature enhancements, and long-term support for existing automation, scraping, backend, or AI systems.
Typical projects we build:
• Web scraping and data extraction platforms
• Price monitoring and competitor monitoring tools
• Lead generation and contact data collection systems
• Workflow automation and process automation tools
• API integrations between CRMs, databases, SaaS tools, and internal systems
• AI-powered assistants, AI agents, and business automation tools
• Document parsing, classification, and reporting systems
• Data pipelines, ETL processes, and structured datasets
• Dashboards, admin panels, and backend web applications
• Google Sheets, Airtable, Telegram bot, and email automation workflows
Why clients work with us:
• Strong experience with similar projects
• Clear understanding of technical requirements and business goals
• Reliable communication and structured project delivery
• Clean, maintainable, and scalable architecture
• Strong problem-solving approach
• Ability to handle changing requirements and real-world edge cases
• Production-ready solutions with error handling and clear documentation
• Long-term support after the first version is delivered
Tech stack and tools:
Python, Java, FastAPI, Django, Spring Boot, PostgreSQL, MySQL, MongoDB, REST APIs, Selenium, Playwright, Scrapy, BeautifulSoup, Pandas, ETL pipelines, cloud services, OpenAI API, ChatGPT, Claude, Gemini, Google Sheets API, Airtable API, CRM APIs, payment APIs, and custom backend systems.
I work best with clients who need more than just a quick script. If you need an experienced developer or technical partner who can understand the goal, clarify the scope, build a reliable solution, and support it over time, I can help.
Send me a message with your project details, data sources, tools, API requirements, or current workflow, and I’ll help you define the best technical approach.
Python
API
API Integration
Automation
Artificial Intelligence
Web Development
Data Mining
Machine Learning
API Development
Data Extraction
PostgreSQL
SQL
Web Crawling
Natural Language Processing
Bot Development
Java
Selenium
ETL Pipeline
Data Scraping
JavaScript
Maksim S.
Gdansk, Poland
$30/hr
5.0
15 jobs
Hello everyone👋! My name is Maksim. I am a Python + JavaScript Full Stack developer 👨🏻💻.
I help clients achieve efficient and modern solutions to their tasks by utilizing cutting-edge technologies of 2024. My development skills enable me to create effective and innovative solutions that contribute to increasing profitability and business growth📈.
The process of my work includes the following steps:
1️⃣ Discussing project details.
2️⃣ Choosing the technologies to use.
3️⃣ Setting a deadline.
4️⃣ Starting the work.
5️⃣ Throughout the project, I share progress updates and gather client feedback to achieve the desired outcome.
6️⃣ Testing the project.
7️⃣ Completing the project. I make sure that all client requirements are met and deliver the final result, including source code.
My skills:
✅ Professional in Backend development.
✅ API integration and development.
✅ Bot development.
✅ Docker containerization.
✅ Microservices development.
✅ Frontend experience in React.
My "nevers":
❌ I never miss deadlines.
❌ I never take on more work than I can handle.
❌ I never submit proposals before thoroughly reading and analyzing the task.
❌ I never disappear in the middle of a project and ensure its complete execution.
❌ I never finish a project until I am proud of it.
❌ I never use technologies I don't fully understand.
I am looking forward to the opportunity to collaborate with you and turn your ideas into reality using Python + JS👋!
Web Development
API Integration
Microservice
API Development
GPT API
AI Model Integration
Bot Development
AI Chatbot
Web API
Telegram API
Facebook Live API
WhatsApp
GPT Chatbot
Scripting
Binance Coin
Andrei K.
Gdansk, Poland
$30/hr
5.0
2 jobs
Senior software developer with 10 years of commercial experience, working in teams ranging
from 2 to 50 members, both remotely and on-site. Have 2 years of team-leading experience.
Built full cycle of development: from gathering product owner requirements to establishing
fully automated release process with high test coverage, detailed analytics and CI/CD. Having
been an employee of ButcherBox.com from the very beginning and playing a significant role in
the technical development of the company, it has now grown to be worth $550 million.
Enhanced full stack development by integrating product marketing strategies, such as A/B
testing and SEO optimizations.
My skills include:
• Node.js 10-18, TypeScript, Express.js, Nest.js, TypeORM, Sequalize, Socket.io
• Python 2-3 - Flask, FastAPI, Pandas, NumPy, Selenium, Chromedriver, Scrapy
• PHP 4-8 - Laravel 4-10, Symfony 1-5, CodeIgniter 1-4, Yii 1-2
• OOP, Design patterns, SOLID, DRY, Unit and Integration tests
• MySQL, PostgreSQL - complex queries, data locking, transactions, performance optimization, PostGIS
• HTML 4/5, CSS 2/3 - Figma or PSD to complete responsive, mobile-friendly layout using LESS, SASS, Bootstrap, Material, Tailwind
• CMSs: Joomla 1-3, Drupal 4-8, Wordpress 2-5
• Blockchain/Crypto - Web3.js, Metamask, Ganache, Truffle, Alchemy, EVM compatible( ETH, BSC, TRX ), BTC, SOL
• Custom CMS/Frameworks/Libraries/APIs development
• React/Hooks/React-query/GraphQL/Hasura/Next.js/Redux/Gatsby/React Native/Expo
• Vue.js/Vuex/Nuxt.js/Vue Router/Vue CLI
• High-load/site speed and bottlenecks performance optimization
• Secure code that prevents SQL/Code injections, XSS, CSRF and other vulnerabilities
• Payment gateways integration: Stripe, PayPal, Google Checkout, 2Checkout, Authorize.net, Cybersource, Jeton, Pay4fun, MuchBetter, Astropay, PayDo, Moonpay, Oobit, Paxful
• Web services ( XML, SOAP, JSON, RSS, REST )
• SVN, Git, Mercurial version control systems
• SEO, internet marketing
• Web crawlers/parsers using Selenium, Puppeteer
• Linux administration - Ubuntu, CentOS ( Nginx, Apache, php-fpm, Iptables, Mysql )
• AWS( EC2, ECS, RDS, Lambda, Amplify, API Gateway, DynamoDB, SQS, SNS, CloudFront, S3)
• APIs integration: Shopify, Zapier, Facebook, Twitter, Google maps, Google Analytics, OAuth, Twilio, SalesForce, SugarCRM, Zurmo, Thumblr, RETS, NetForum, Leads360, Zoom, Mandrill, Mixpanel and more
• ElasticSearch/Sphinx/Solar full text search engines
• CI/CD/DevOps using Docker, Ansible, CircleCI, New Relic, Datadog, Logrocket, Sentry
PHP
Node.js
React
Vue.js
MySQL
Laravel
ExpressJS
NestJS
Linux
Sergei L.
Gdansk, Poland
$40/hr
5.0
8 jobs
I have 6 years of experience in full-cycle software development, I have worked on developing web, integration, embedded and database applications, and AI technology.
The main technologies that I used in my previous projects were Python, Angular, React, SQL, Linux, AWS, Javascript, HTML, CSS, Azure, and Arduino.
Methodologies - Scrum, Agile.
TECHNOLOGIES FAMILIAR WITH
● Python 3; Python 2;
● Django; Flask; FastAPI; SQLAlchemy, PyQt;
● StableDiffusion, Transformers, Tesseract, Scikit Learn, TensorFlow, NLTK;
● JS; TypeScript; Angular; NodeJS; ReactJS;
● Debian; CentOS; Ubuntu; LinuxMint;
● SQL; PostgreSQL; MySQL;
● MongoDB; ElasticSearch;
● jQuery, Ajax;
● Bootstrap; HTML/CSS; MaterialUI;
● Docker; Kubernetes;
● AWS EC2; AWS S3; AWS Lambda; AWS DynamoDB;
● Azure Cloud; Heroku; Google cloud;
● Bitcoin; Ethereum; Dash;
● Git;
My personal qualities - good team player, creativity, brilliant communication skills, constantly learning new.
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