Hire the Best Unit Testing Specialists
in Poland

🟢 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.

Summary: Senior Manual QA Engineer with 10+ years experience in software quality assurance. Successfully led QA teams at Logic Software Inc., improving customer satisfaction from 70% to 99.9%. Managed and executed tests for various web-based and desktop tools, mobile apps, ensuring high-quality product delivery. Seeking to leverage extensive QA expertise to contribute to top-tier software quality at your organization. Work experience: Logic Software Inc., Senior QA Engineer / QA Manager, 2018 - 2025 • Managed projects including Easy Projects, Birdview PSA, ETT, Logic Protect, and Easy Vending, ensuring alignment with quality standards. • Developed and managed processes to ensure products met quality, function, and reliability standards, and communicated these standards to QA and product development teams. • Coordinated and improved product testing processes, increasing customer satisfaction from 70% to 99.9%. • Executed functional software and hardware tests for multi-tier web-based and mobile project and resource management systems, APIs, time-tracking tools, license management desktop tools, and vending machine management tools using Postman and Android emulators. • Supervised QA department activities and staff, establishing high-quality standards and efficient workflow. • Reviewed client, customer, and user feedback to identify areas for improvement, leading to enhanced product quality and customer satisfaction. ITA Labs, QA Engineer (part-time), 2015 - 2018 • Managed projects including IMS, IDSearch, IDCheck, and Secret Disk Enterprise, ensuring timely delivery and quality. • Performed functional, regression, integration, and usability testing of complex .NET biometric identification projects and their APIs using Target Process and Chrome Dev Tools, ensuring data protection and centralized management. • Created and maintained Windows, MS SQL Server test environments using VMware and Hyper-V, improving testing efficiency and reliability. Skills: • Strong leadership, Problem-solving and Analytical skills, Multi-tasking, Meticulous attention to detail, Focus on quality and usability, Troubleshooting, Functional testing, Non-functional testing, Software testing, Hardware testing. • Cloud technologies: MS Azure, Entra ID (Azure AD), AWS. • OS administration: Windows servers, Active Directory, Linux, Unix, macOS, Android, iOS. • RDBMS administration / reports: MS SQL, MySQL, PostgreSQL, Oracle DB; PowerBI. • Development methodologies / environment: Agile / Scrum, Waterfall; CI/CD, Azure DevOps, GitHub, MS Testing Center. • Project / resource management: Jira, Easy Projects/Birdview, Asana, Wrike, MS Project. • CRM tools: Salesforce, Hubspot, Zendesk. • Web servers: Web servers: IIS, Nginx. • Virtual machines: VMware, Hyper-V, VirtualBox. • Rest API tools: Postman, SoapUI, Swagger. • Integration tools: Zapier, Albato. • Monitoring tools: Fiddler, New Relic, Azure DevOps Dashboards, Chrome dev tools, Logcat, Grafana. • Mobile / Web testing: Android Studio, Android/iOS emulators, LambdaTest, Browserstack, Figma, HTML/CSS, JSON/XML. • Shells: PowerShell, Bash. • Containers / MQ: Docker, Kubernetes; RabbitMQ. • Network technologies: TCP/IP, Ethernet, FTP, Firewalls, Wireless. • Authentication protocols / specifications: OAuth2, SAML, LDAP, Azure AD, ADFS. Languages: Russian: Native. English: B2 Upper Intermediate. Education: BSUIR University of Informatics and Radioelectronics Bachelor of Science degree in Computer Engineering.

Looking for a high-quality, responsive website or app within your budget? I deliver fast, scalable, and tailored solutions to meet your business needs. I’m ready to bring your vision to life. Whether it’s a web-page, web-app, e-commerce store, or blog. I specialize in building web projects from scratch, optimizing existing sites, and ensuring smooth performance with modern code practices. With expertise across front-end development and a trusted network of backend developers and designers, I offer full-stack solutions that include everything from design integration to final deployment. Why choose me? Comprehensive Services: From landing pages to full e-stores and promotional sites, I can deliver on time and within budget. Client-Centric Approach: I work with clients across all budget ranges and adapt to their unique project needs, ensuring a flexible and personalized approach. End-to-End Solutions: I collaborate with expert backend developers to provide full project implementation, from architecture to deployment, ensuring seamless and efficient development. Clear Communication: I offer free consultations, detailed project plans, and transparent cost breakdowns, keeping you informed every step of the way. I also mentor aspiring developers at Glo-Academy, which sharpens my problem-solving and communication skills—qualities I bring to every project. Let’s collaborate and create something exceptional! Technical Expertise: GitHub nickname: Krobirow Prog. languages: JavaScript, TypeScript, HTML, CSS, JSON, PHP(entry lvl) Some libraries working with: Tailwind CSS, Bootstrap 3+ / 4+ / 5+, Materialize CSS, Material UI, jQuery, SCSS Framework: React, React-Native, Node.js (redux, react-redux, thunks, axios, rtk-query, formik, react-hook-form, yup, styled-components, expo, expo-router, express) Backend toolkits: Elastic-search, Swagger CMS: Wordpress / OpenCart Source control: GIT / BitBucket / Azure Testing: Jest, Mocha, react-testing-library Toolkits: GULP, NPM, Webpack, REST API OS: Windows / Unix Development tools: DOCKER, VS Code, Figma, Avocode, Lunacy, FileZilla, PhotoShop, AdobeXD, Teamwork: JIRA, Azure, Trello (SCRUM) Languages: English (Fluent), Ukrainian(native), Polish (Fluent)