🥇 5 plus Years of Experience in Manual QA 🥇 Full coverage of testing for Web and Mobile products, including API validation 🥇 Clear, developer friendly test documentation and bug reports 🥇 Smooth cooperation in remote teams and Agile workflows Performing such types of testing ✅ Manual ✅ Exploratory ✅ Functional ✅ System ✅ Regression ✅ Smoke ✅ UI and UX testing ✅ Cross browser and compatibility testing ✅ API testing Experienced in Reviewing requirements and clarifying acceptance criteria before testing starts Creating practical test scenarios and test cases based on real user behavior Reporting bugs with clear reproduction steps, expected versus actual results, and evidence Supporting fast release cycles by verifying fixes and running regression before production Working closely with developers and product leads to reduce regressions in complex workflows Technical expertise includes 🔎 Management tools: Jira, Azure DevOps, TestRail, Trello, Confluence, Asana 🔎 API testing: Postman, Swagger 🔎 Debugging: Datadog, Splunk, Amplitude 🔎 Cross browser testing: BrowserStack, LambdaTest 🔎 Databases: basic SQL, PostgreSQL 🔎 Remote collaboration: clear async updates and structured status reporting 🔎Mobile testing: TestFlight, Google play, Firebase, Appstore connect I have worked with SaaS style products and workflows where many objects and calculations depend on each other, so I test not only isolated features but also system behavior and edge cases. I will be glad to help your team ship stable releases that meet business needs and feel reliable for users. Feel free to message me and share your product scope. QA Tester, Manual QA, Software Quality Assurance, Web and Mobile Testing, SaaS QA, Functional Testing, Exploratory Testing, Regression Testing, Smoke and Sanity Testing, End to End User Flows, UI and UX Testing, Responsive Design Testing, Cross Browser Compatibility, iOS and Android App Testing, UAT Support, Release Verification, Production Checks, Bug Reporting, Defect Triage, Repro Steps, Test Cases and Checklists, Test Plan, Acceptance Criteria Review, Requirements Validation, Edge Case Coverage, API Testing, REST API Validation, Postman, Swagger, Chrome DevTools, Network Logs, HAR Capture, SQL Queries, PostgreSQL, Salesforce QA, SOQL, Stripe Payments Testing, Webhook Validation, Analytics Tracking Validation, Amplitude, Jira, TestRail, Confluence, Azure DevOps, Trello, BrowserStack, LambdaTest, TestFlight, Firebase, App Store Connect, Remote Testing, Azure Virtual Machines, AnyDesk, Localization QA, Content QA, Data Integrity Checks, Calculation Validation, Session Based Testing, Agile QA, Sprint Testing

👋 Hi! Thanks for stopping by. I'm a Senior Full-Stack JavaScript Developer with 5+ years of experience building modern web applications using React, Next.js, Node.js, and TypeScript. I help startups and businesses turn ideas into fast, scalable, and user-friendly products. Whether it's building an MVP, scaling an existing platform, or modernizing legacy applications, I focus on writing clean, maintainable code that delivers real business value. 🚀 My expertise ✅ React.js & Next.js ✅ TypeScript & JavaScript (ES6+) ✅ Node.js & Express.js ✅ REST API & GraphQL ✅ MongoDB, PostgreSQL, MySQL, Redis ✅ Tailwind CSS, Material UI, Bootstrap ✅ AWS, Docker, Vercel, Netlify ✅ Authentication (JWT, OAuth) ✅ Stripe & Payment Integrations ✅ Third-party API Integrations 💼 What I can help you with ✔ SaaS Development ✔ CRM & Admin Dashboards ✔ MVP Development ✔ AI-powered Web Applications ✔ E-commerce Platforms ✔ API Development & Integrations ✔ Performance Optimization ✔ Bug Fixing & Feature Development ✔ React Migration & Refactoring ⭐ Why clients work with me ⚡ Clean and maintainable code ⚡ Fast communication ⚡ Pixel-perfect implementation ⚡ Attention to performance and UX ⚡ Reliable long-term collaboration ⚡ On-time delivery I'm committed to building applications that are not only visually appealing but also scalable, secure, and easy to maintain. 🚀 Let's build something great together!

✅ 10+ 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 💼 39+ 𝗝𝗼𝗯𝘀 𝗖𝗼𝗺𝗽𝗹𝗲𝘁𝗲𝗱 ✅ 100% 𝗖𝘂𝘀𝘁𝗼𝗺𝗲𝗿 𝗦𝗮𝘁𝗶𝘀𝗳𝗮𝗰𝘁𝗶𝗼𝗻 I am a full stack web developer with over 10 years of experience, specializing in business automation, PHP, and Python development. I create custom sites, develop custom plugins, build WooCommerce add-ons, and handle custom API integrations and automation. My extensive experience and proven track record make me a valuable asset to any project. In addition to my expertise in PHP and JS, I am proficient in Python, focusing on LLM, RAG models, computer vision, business automation, and data parsing. My skills extend to Vue.js, and Node.js, providing a comprehensive solution for diverse web development needs. Key Highlights of My Services: Pixel-Perfect Theme Development: Tailored to align with design nuances. Custom WordPress Theme Design: Capturing the essence of your brand. Customized WordPress Plugins: Enhancing site functionality. Responsive WordPress Design: Ensuring seamless cross-device viewing. Python Expertise: Specializing in LLM RAG models, computer vision, business automation, and data parsing. Advanced Web Solutions: Expertise in Vue.js, and Node.js frameworks. API Development and Integration: With WooCommerce, Shopify, or any Node.js application. I leverage top-tier tools like JetBrains IDEA, VS Code, and VIM, and maintain strict version control with GitHub and GitLab. By adhering to agile methodologies, I ensure timely, efficient, and high-quality project delivery. My portfolio showcases versatility and depth, including WooCommerce marketplaces, LMS systems, intricate medical portals, and cryptocurrency platforms. Open communication, daily updates, and a commitment to understanding and executing client feedback are central to my work ethic. I champion agile methodologies and believe in proactive, transparent communication. With me, you directly communicate with the expert—no middlemen, no ambiguities. If you're seeking a seasoned developer who combines technical prowess with an impeccable track record, let's embark on your next web journey together. Best Regards, Ihor Niezhynskyi

🎯 My name is Dmytro. I'm a Full-Stack Developer specializing in Python with solid experience in building robust web applications and APIs using Django and FastAPI. 🦾 About Me: ✔ Python developer with hands-on experience in back-end and full-stack development ✔ Back-end stack: Python (Django, Django Rest Framework, FastAPI) ✔ Databases: PostgreSQL, SQLite, Redis ✔ Front-end basics: HTML, CSS, JavaScript ✔ Experience with microservices architecture, Stripe API, Telegram bot API, Celery, Docker ✔ OpenAI API integration ✔ I enjoy building efficient, testable, and scalable systems that solve real problems and deliver value JoinToIT has 10+ years of experience in top-notch software engineering worldwide. Among our clients are vendors of Tesla, UberEats competitor in the EU, and Peloton bikes competitor in the USA, utilizing different technologies such as React, React Native, Vue.js, Node.js, Laravel, Go (Golang), Django, Flask, Flutter, Firebase, etc. 🚀 🦾Our team has already worked with such industries as: ✔️ ChatGPT integration ✔️ Sport ✔️ Healthcare ✔️ Social media ✔️ Sales ✔️ Automotive ✔️ Manufacturing ✔️ Education ✔️ Finance ✔️ Legal We are eager to assist you with web & mobile applications, CRM and ERP systems, e-commerce websites, etc. We use the latest technologies: PHP, Laravel, JavaScript, React & React Native, Golang, PHP, Laravel, Python, Django, Flask, and others. Our approach to the project development is professional. We offer you a complex team, which includes QA, BA, PM, UI/UX designers, and Developers with the expertise in the needed stack for your business. We also follow Agile methodology in our work, combining SCRUM and Kanban. As well, we can refer one developer to fulfill your needs and join your team. We can provide you with a fixed price for the project. This means you will know what budget you will spend and what payment will be upon delivery. We are an organization having 12 values inside with one of them being - “Respect and honesty towards the client”. And our key competence is - “Know the client's business better than himself”. I believe this is what we will do for you doing this software. Our team counts 70+ experienced cross-platform developers skilled in PHP, JavaScript, MySQL, Python, Go, Node.js, React, etc. to deliver you the best market practices. You will be deeply involved in our project development process. Our priority and main goal is to bring your project success, whether complex, a PWA, or a slim MVP. We use the latest technologies to build and launch customers' software solutions which include: ➕Languages: PHP, JavaScript, Python, CSS, HTML ➕Frameworks: Vue.js, Node.js, ExpressJS, AdonisJS, Nust.js, React.js, React Native, Firebase, Goland, Django/Flask, Laravel, Bootstrap ➕API Integration and Development: ChatGPT, Stripe, PayPаl, Twilio, TextMagic, Xero, DocuSign, Google Maps and other maps, Facebook, Twitter, Instagram, Hellosign, etc. ➕Database Management: MySQL, PostgreSQL, MongoDB, DynamoDB, Elasticsearch, Cassandra. 🎯 Other services: ✔️Development: ERP system/ERP software, CRM system, MVP development, PWA development ✔️ Customizations: SuiteCRM, SugarCRM, Dolibarr ERP, Salesforce App Development ✔️ Adobe XD Prototyping and Wireframing, Zeplin, Invision, Marvel App ✔️ Bookkeeping Accounting, Twilio API, Payment Gateway Integration, Amazon API ✔️ Integration of Google Services ✔️ Azure Machine Learning, NLP Machine Learning ✔️ Integrations: Payment Gateway | PayPal | Stripe | Intuit QuickBooks Bookkeeping Accounting | Xero ✔️ Graphic Design Adobe Photoshop | Illustrator | Figma Feel free to reach out and create an incredible product together. Best regards, Dmytro

For over two decades, I’ve been helping many companies bring their ideas to life through software. I’m a Senior Python Developer who specializes in crafting high-quality Python backends, responsive frontends, and APIs, building platforms that are simple to use, easy to maintain, and ready to grow with the business. I like seeing teams work with systems that just make sense. 🥇𝐖𝐡𝐲 𝐏𝐚𝐫𝐭𝐧𝐞𝐫 𝐖𝐢𝐭𝐡 𝐌𝐞: ⭐ 20+ years of full-stack python development experience ⭐ 100+ successful web applications delivered ⭐ 15+ AI systems integrated with Python into business workflows ⭐ 4000+ Upwork hours ⭐ Extended team of 65+ tech experts ⭐ 70% of clients return for long-term collaboration ⭐ Transparent communication, agile mindset, and dedicated PMs available 📌 𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤 I like to keep the development process simple and clear for clients. My workflow as a Senior Python Developer is designed to make projects predictable and stress-free: ✔️ 𝐃𝐢𝐬𝐜𝐨𝐯𝐞𝐫𝐲 & 𝐏𝐥𝐚𝐧𝐧𝐢𝐧𝐠. We start by discussing your goals and examining your current systems. This lets me design a solution that fits your needs and can grow with your business. ✔️ 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧. I work on both backend and frontend and connect them so everything just works together. Mostly, I use Python (Django, Flask, FastAPI) for backend and AI/ML integration, paired with React for the frontend, but I switch tools if the project calls for it. ✔️ 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 & 𝐅𝐢𝐧𝐞-𝐓𝐮𝐧𝐢𝐧𝐠. We go through the system and identify what feels off. Then, if needed, I make adjustments so that it’s faster, error-free, and easier to use. ✔️ 𝐎𝐧𝐠𝐨𝐢𝐧𝐠 𝐒𝐮𝐩𝐩𝐨𝐫𝐭. Launch is just the beginning. I stay involved to monitor, update, and enhance the platform as your business evolves. 📌 𝐓𝐞𝐜𝐡 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 My approach as a Python Developer focuses on AI/ML integration, selecting the best technologies from a broad toolkit to build a solution that is perfectly tailored to your project's goals. ⚙️ [Backend]: ➜ Python (Django, Flask, FastAPI), PHP (Symfony, Zend, Yii, Laravel) ⚙️ [Frontend]: ➜ React.js, Vue.js, AngularJS, HTML5, CSS3, Bootstrap, jQuery ⚙️ [Databases]: ➜ PostgreSQL, MySQL, MongoDB ⚙️ [Mobile & Cross-Platform]: ➜ Java, Swift, Objective-C, PhoneGap, OpenGL ⚙️ [Cloud & Devops]: ➜ AWS, Microsoft Azure, Google App Engine ⚙️ [Methodologies]: ➜ Agile (Scrum, XP), BDD/TDD, RAD 📌 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈 𝐅𝐨𝐜𝐮𝐬 𝐎𝐧 I’ve collaborated with companies across a range of sectors, building platforms that grow with their business: ➜ 𝗘-𝗹𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 (EdTech): including LMS integrations and interactive courses ➜ 𝗙𝗶𝗻𝗮𝗻𝗰𝗶𝗮𝗹 𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 (FinTech): dashboards, analytics tools, and investment platforms ➜ 𝗛𝘂𝗺𝗮𝗻 𝗥𝗲𝘀𝗼𝘂𝗿𝗰𝗲𝘀 & 𝗥𝗲𝗰𝗿𝘂𝗶𝘁𝗺𝗲𝗻𝘁 (HR Tech): automation and management systems ➜ 𝗖𝗥𝗠 𝘀𝘆𝘀𝘁𝗲𝗺𝘀 (CRM Tech): tools to manage clients, leads, and workflows ➜ 𝗘-𝗰𝗼𝗺𝗺𝗲𝗿𝗰𝗲 & 𝗺𝗮𝗿𝗸𝗲𝘁𝗽𝗹𝗮𝗰𝗲𝘀 (E-commerce Tech): online shops, multi-vendor platforms, and order management solutions 📌 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐢𝐨𝐧 𝐌𝐨𝐝𝐞𝐥𝐬 I adapt to your needs with flexible engagement models designed for clarity and project success. ✔️ 𝐓𝐢𝐦𝐞 & 𝐌𝐚𝐭𝐞𝐫𝐢𝐚𝐥. We track the hours spent on your project, and you pay for only what’s actually done. This model is useful when the project is evolving, or you want to try out new ideas step by step. ✔️ 𝐅𝐢𝐱𝐞𝐝 𝐏𝐫𝐢𝐜𝐞. Here, the full scope and cost are agreed on from the start. This model works for projects with clear requirements and helps keep the budget and timeline predictable. ✔️ 𝐃𝐞𝐝𝐢𝐜𝐚𝐭𝐞𝐝 𝐓𝐞𝐚𝐦. My engineers join your team and follow your workflows. This cooperation model is good when you need ongoing development and want team members who fully understand your processes. Looking for an experienced Senior Python Developer to build a robust platform and modern tools? I handle both the backend and frontend and carry projects through to completion. Get in touch, and we’ll outline the way forward.

Hi! I am Viacheslav🙌 As a professional Python developer with over 8 years of experience, I have a deep understanding of the language and its many applications. From building data analytics tools to developing web applications and scripting automation solutions, I have worked on a wide range of projects that have honed my skills in Python programming. Throughout my career, I have developed proficiency in various Python frameworks and libraries, including Django, Flask, NumPy, Pandas, and Scikit-learn. I am also familiar with other technologies such as SQL, and NoSQL databases, and front-end technologies such as HTML, CSS, and JavaScript. As a detail-oriented developer, I pride myself on delivering clean, well-documented, and efficient code that meets or exceeds client expectations. **Some facts: ✅ 2000+ jobs completed on Upwork 💼 22 years of experience 🥇 Upwork Breakthrough of the Year 💪 One of the best B2B firms on Clutch 🌎 20+ Clients’ locations 💻 Full cycle development services Whether you need a custom Python solution, a web application, or a data analytics tool, I am confident that I have the skills and expertise to deliver high-quality results that meet your specific needs. Let's work together to bring your ideas to life. Keywords: python developer, python django, python django developer, machine learning python, python full stack developer, python web scraping, python full stack developer flask, python developer aws, python ai developer, Python, Django, Flask, FastAPI, Pandas, NumPy, Matplotlib, Seaborn Scikit-learn, TensorFlow, PyTorch, Keras, XGBoost, spaCy, NLTK, Transformers, BERT, GPT, OpenCV, CNN, Object Detection, PostgreSQL, MySQL, SQLite, MongoDB, Docker, AWS, Git, Linux, REST API, Web Scraping, Jupyter Notebook, Automation

🚀 With over 8 years of experience as a senior software and data engineer, I’ve honed my expertise in crafting innovative solutions in software development and data engineering. 📊 My journey began with a bachelor’s degree in software engineering and a master’s degree. 🎓 Currently, I’m pursuing a PhD in computer science to fuel my passion for technology and innovation further. 💡 🐍 Throughout my career, I’ve been deeply involved in diverse Python projects, crafting efficient and scalable solutions to meet various needs. 🌐 My proficiency in Python empowers me to tackle complex challenges and deliver high-quality software solutions. 🛠️ My core skills include: • Python 🐍 • Django 🌐 • Flask 🍶 • FastAPI 🚀 • AWS ☁️ • Software Architecture 🏛️ • PostgreSQL 🐘 • Data Engineering 📊 • Databricks 🔥 • Pandas 🐼 📚 I’m a firm believer in continuous learning and constantly strive to enhance my skills to produce top-notch code and data solutions. ✨ Beyond coding, I’m an avid sports enthusiast 🏃‍♂️ and regularly engage in various sports activities to stay energized and focused. 🏋️‍♂️

Over the last 15 years I have developed a wide range of complex web systems using: - PHP | Laravel | Symfony | CodeIgniter - JavaScript/TypeScript | Node.js | Vue.js - Tailwind CSS | HTML | CSS - MySQL | PostgreSQL | MongoDB for start-up companies and large businesses. My core competency lies in building complex client-server solutions, RESTFul APIs for mobile clients as well as front-end UI and single page applications and progressive web apps. I also have some experience with integrating payment systems like Stripe, PayPal, Authorize.NET, as well as various APIs like Facebook, Twitter, Amazon, Google Maps, Twilio, etc. I am looking for opportunity to work on interesting long-term project.

Expert Desktope Developer (Delphi, Pascal, C, C++, Assembler) I'm looking for conscientious and helpful people, with which the work becomes a pleasure.

Call me if you need safe releases, without pain in A$$ Let me use my years of experience as a QA Lead and Consultant to assist you with your needs and I am sure you will be pleased with the added value I bring to the table. What are you truly seeking? The most economical QA option or a seasoned QA Specialist who will elicit tears of joy from your customers, leaving them ecstatic with the seamless experience your project delivers ✅6+ Years of QA Experience and more than 15 completed long-term web and mobile projects Total value of finished projects and start-ups more than 1000000$ 5+ years in QA. My main goal - to help companies setup testing processes from the scratch. Don't fall into the trap, that QA needed on the last step before product launch. Domains and Products: - Web applications - Mobile applications - SaaS Products - E-commerce (Shopify) - E-learning/ Edtech - Fintech - Medical Test Management tools that I worked with : Jira, Trello, TestRail, Xray, Zephyr, TestPad, Asana, Monday, Clickup and more