Hire the Best API Integration Freelancers
in Ukraine

Experts in API Integration and Integration Architecture for complex business systems. When business systems must exchange data reliably, simple API connections are rarely enough. We design and build production-grade API integrations connecting ERP, CRM, e-commerce platforms, and internal systems — focusing on reliability, observability, and long-term maintainability. Our work centers on custom integrations that support real business operations, not fragile scripts or quick automation hacks. 🧩 What We Do 🔹 API Integration & System Connectivity Design and implementation of reliable API integrations between ERP, CRM, e-commerce, marketing, and internal systems using REST APIs, webhooks, and secure authentication. 🔹 Integration Architecture Design of robust integration architectures including data synchronization strategies, retry logic, monitoring, error handling, and long-term maintainability. 🔹 On-premise Integration Platforms Custom API integration hubs deployed on your infrastructure (Laravel / PHP), including scheduling, logging, monitoring, and full operational control. 🔹 API Development & Consulting End-to-end API development: REST API design, OAuth authentication, webhook processing, multi-system integration strategies, system audits, and integration consulting. 🔹 Data Synchronization Reliable data pipelines between ERP, CRM, analytics, and internal systems with validation, monitoring, and recovery mechanisms. ⚙️ Our Strengths ✅ Strong focus on API integration for complex business workflows (finance, e-commerce, logistics, marketing operations) ✅ Production reliability by default — logging, retries, monitoring, and alerts included ✅ Security-first architecture suitable for on-premise and private cloud deployments ✅ End-to-end ownership — from architecture and API development to deployment and long-term support 🧠 Tech Stack Languages & Frameworks: Laravel / PHP / Node.js / Python Integration Technologies: REST APIs, Webhooks, OAuth, event-driven integrations Platforms & APIs: HubSpot, QuickBooks Online, Xero, Shopify, Acumatica, BigCommerce, Airtable, Slack, Notion, Google Workspace Infrastructure: AWS, DigitalOcean, Docker, Linux 🌟 Why Clients Choose QPMSoft 💼 $400K+ earned on Upwork | 100% Job Success | 10+ years building integration systems 🤝 Clear communication, fast response times, and realistic expectations 🚀 Flexible engagement models — from focused API integrations to long-term integration platforms Whether you need API Integration, custom API Development, or reliable system integrations between ERP, CRM, and e-commerce platforms, we focus on building systems that are stable, maintainable, and production-ready.

I’m a Full-Stack Developer with hands-on experience building and maintaining web applications, e-commerce systems, and API integrations for business clients. I specialize in working with existing codebases — fixing issues, improving performance, and ensuring data flows correctly between frontend, backend, and external systems. My core strengths include API integrations, SQL databases, debugging complex issues, and implementing business logic such as pricing, orders, and data synchronization. I regularly work on: Fixing frontend and backend bugs in existing applications API integration and troubleshooting data issues SQL queries, data cleanup, and database support E-commerce features (pricing logic, orders, integrations) Website updates, upgrades, and regression testing I focus on delivering clean, reliable, and fast solutions that keep systems running smoothly. If you need someone who can quickly understand your system, identify issues, and fix them without unnecessary complexity — I can help.

★★★★★ Professional developer. Having 8+ years of experience. Web development: ✔ PHP ✔ HTML ✔ CSS ✔ JavaScript (Jquery/Jquery UI) ✔ MySQL ✔ XML ✔ JSON ✔ CSV ✔ API ✔ Bootstrap Why should you work with me? ✔ Perform your project in a great way. ✔ high quality; ✔ Meeting deadlines; ✔ 40+ hrs/week online;

I build automation systems that replace manual work — using n8n as the core layer. I specialize in connecting Airtable, APIs, Google Drive, BigQuery, and CRMs into workflows that handle data sync, reporting, and operational logic without manual intervention. What I typically work on: - n8n workflows: REST API, webhooks, pagination, deduplication, error handling, sub-workflows - Airtable architecture: table structure, linked records, access control, sync logic - Data pipelines: CRM → BigQuery → Looker Studio, automated and reporting-ready - Operational automation: booking flows, donor reporting, invoice processing, Google Drive automation I don't just connect tools — I design how data moves between them, where it gets validated, and what happens when something breaks. Past work includes systems for humanitarian organizations (Mission Kharkiv, Eleos Ukraine) and private businesses in the UK. 100% Job Success · Top Rated

I build Python automation tools, AI-powered scripts, and backend integrations that save time and reduce manual work. My core stack: Python, OpenAI/Claude API, REST APIs, web scraping, JavaScript/TypeScript, Node.js, PHP. What I've delivered: - AI editorial review tool — processes .docx manuscripts with automated annotations - YouTube Data Scraper — collects video, comment and channel stats via Data API - JARVIS — desktop AI assistant with voice recognition and GPT integration - Real-time network security scanner with WebSocket updates I write clean, documented code and deliver on time. Available for automation scripts, AI integrations, data pipelines, and API work.

🟢 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 Dmitriy, 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.