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Experienced QA Engineer | Manual & Automation Testing | Selenium, Playwright | API & Web/Mobile QA Specialist I’m a professional Quality Assurance Engineer with proven experience in both manual and automated testing across web, mobile, and API domains. I help startups and established tech teams deliver high-quality, bug-free software that users love. I have my own testing devices. With hands-on expertise in writing comprehensive test plans, designing and writing test cases/scripts, and building robust automation frameworks, I ensure every release meets the highest standards of performance and reliability. What I Do Best Manual QA Testing (Functional, Regression, Smoke, UAT) Automation Testing using Selenium, Cypress, Playwright API Testing & Automation (Postman, REST APIs) Cross-Browser & Cross-Device Testing Test Case Design, Execution & Bug Reporting CI/CD Integration of Test Suites (GitHub Actions, Jenkins) Test Documentation & Detailed QA Reports Tools & Technologies I Work With Automation: Selenium WebDriver, Playwright Languages: Java, JavaScript API Testing: Postman, REST APIs Test Management: Jira, TestRail Version Control: Git & GitHub Platforms: Web, Android, iOS (mobile device testing) Why Clients Choose Me Strong analytical skills and meticulous attention to detail Client-first approach — clear communication, fast responses Thorough defect reporting with reproducible steps Ability to quickly join ongoing projects and deliver immediate value Flexible engagement — hourly or milestone-based Proven track record of successful deliverables Let’s work together to make your applications more stable, scalable, and ready for production! Message me now to discuss your project goals and timelines. Knowledge of Software testing methodologies. • Designing test plans, writing test cases/scripts • Functional, Integration, Regression, User acceptance, Performance, Load testing. • Automate Web application using Selenium with Java • TestNG framework

⭐⭐ “I am QE Test Automation Engineer , Completed approx. 13,000 hours with a good rating.”⭐⭐ ⭐ AI Training Support: Assisting in model optimization through RLHF, data annotation, and strict quality control. ⭐ AI Training & Fine-Tuning: Experience in data labeling, reinforcement learning from human feedback (RLHF), and prompt engineering to improve LLM accuracy. ⭐ End-to-End AI Testing: Validating AI integrations, API responses, and edge-case behaviors in software systems. ⭐ AI Application Reviews: Evaluating AI tools and apps for usability, functional performance, and overall response quality. ⭐ AI Orchestration & Verification: Managed end-to-end AI coding plans, orchestrating models (Claude, Gemini) through draft, execution, and verification phases while monitoring live token usage and execution costs. ✔️ Automation Testing ✔️ Playwright ✔️ AI-Assisted testing ✔️ Functional QA ✔️ Website testing ✔️ Manual QA ✔️ Bug report✔️ Usability testing & App reviews✔️ iOS and Android app testing ✔️ Regression Testing✔️ Selenium WebDriver ✔️ Cypress ✔️ End-to-end testing ✔️ UI & UX testing ✔️ ChatGPT ✔️ Gemini ✔️ Copilot ✔️ Claud Are you looking to launch a flawless web or mobile app, scale your release velocity, or get deep, critical insights into why your users might be dropping off? As a Senior QA Automation & Manual Testing Engineer with over 11 years of experience across US-based enterprise platforms and high-growth startups, I don't just find bug. I protect your product’s reputation and user experience. I bridge the gap between heavy-duty engineering (building scalable automation pipelines) and high-empathy user advocacy (usability reviews, deep exploratory sessions, and UX feedback). 🚀 High-Demand QA Services I Offer: 1. Premium US-Based Web & Mobile App Reviews & Feedback Real-Device USA Reviews: Testing on actual, physical iOS and Android devices to replicate authentic US user environments, carrier networks, and localized workflows. UX & Usability Audits: Deep-dive reviews looking at user friction points, layout inconsistencies, navigation logic, and accessibility (WCAG). You receive a structured video walk-through or a comprehensive report. Exploratory & Ad-Hoc Testing: Going off-script to mimic unpredictable real-world user behavior, finding edge-case crashes before your customers do. 2. Enterprise-Grade Test Automation Frameworks: Web Automation: Architecting lightning-fast, zero-flakiness End-to-End (E2E) automation frameworks from scratch using Playwright (TypeScript/JavaScript), Cypress, and Selenium (Java).Mobile Automation: Native and cross-platform app test frameworks using Appium.CI/CD Integration: Sharding and parallelizing tests inside GitHub Actions or Jenkins so your dev team gets quality feedback in under 5 minutes on every commit. 3. Functional, Manual, & API Testing Comprehensive test plan/test case design in Jira, TestRail, or Azure DevOps. Robust REST API testing and automation utilizing Postman. Regression and Smoke testing cycles to protect critical business logic during fast-paced sprints. 🛠️ Core Technical & QA Stack: Languages: TypeScript, JavaScript, Java, Python, SQLAutomation: Playwright, Selenium WebDriver, Cypress, AppiumMobile Testing: Physical iOS (iPhones) & Android devices, BrowserStack, Firebase Test LabAPI & Backend: Postman, REST Assured Management & CI/CD: Jira, TestRail, GitHub Actions, Jenkins, Docker 💼 What You Get in Every Deliverable: Clear, Reproducible Bug Reports: Ticket-ready bug descriptions with steps to reproduce, clear environmental context, and attached screen recordings/logs. Actionable UX Feedback: Strategic product reviews detailing why a feature feels clunky and how to optimize it for higher conversion rates. Clean, Maintainable Code: Automation repositories built using the Page Object Model (POM), fully commented and ready for your developers to maintain. Whether you need a quick, meticulous usability review before a major app store launch, or a strategic partner to build an automation testing pipeline from scratch—let's chat. Click the "Invite" button on the top right, and let’s discuss how we can secure your app's quality.

Software QA Engineer with more than 4 years of experience in different types of testing including Manual and Automation. Experienced in design and execution of Test Cases based on the requirements. Expertise in bug reports. Expertise in using different bug tracking tools like Jira Experience writing automation test framework for desktop and webUI using Testcomplete Experience in Usability, API Testing, Functional Testing, Integration Testing, Data Driven Testing and Load Testing Experience in writing SQL Queries for Database Testing to verify Data Validity, Data Integrity, Data Recovery, and Data Security. Automation Tools: Selenium , JMeter, Postman

Ex-NASA & Tesla Product Development Engineer | Mechanical & Product Design Expert I’m an avid tinkerer, systems thinker, and product development engineer who thrives on tackling challenging problems and building authentic connections with the people I work alongside. My career has spanned from working at NASA to designing at Tesla, giving me a unique perspective on what it takes to bring products from the back-of-the-napkin concept stage all the way through to rolling off the manufacturing line. What I bring to your team: Full Product Lifecycle Expertise: I specialize in taking products end-to-end—from early concept sketches and CAD models to prototyping, testing, DFMEA analysis, validation, and production release. Hands-On Mechanical & Systems Design: Whether it’s mechanical design, reverse engineering, or complex system integration, I’m comfortable getting deep into the weeds to debug, optimize, and refine. Leadership & Strategic Vision: I thrive in leadership, design contributor, or mentor roles. I’m equally at home designing precision components as I am defining engineering roadmaps, aligning team priorities, and guiding engineering leads towards impactful goals. Multidisciplinary Strength: As a jack of all trades, my skillset bridges mechanical design, coding and controls, product research, branding strategy, and cross-functional integration to ensure your product is not only engineered to perform but also positioned to thrive in its market. Key Services: Mechanical Design & 3D CAD Modeling (SolidWorks Expert) Custom Part & Prototype Design Reverse Engineering & Redesign Design Failure Mode & Effects Analysis (DFMEA) Full Product Validation: Verification, Integration Testing, Compliance Reviews, Root Cause Analysis Product Research & Market-Informed Design Technical Drawings with GD&T Branding & Product Presentation Support My Philosophy: I believe great engineering is rooted in people, passion, and an unrelenting drive for discovery. I take pride in building exceptional cultures and products that push the boundaries of innovation – and I look forward to bringing that same energy and expertise to your next project. Let’s build something extraordinary together.

I've been a Software QA Engineer for 11+ years and worked in a wide range of QA projects. I was one of the first QA Engineers for Inbox at Google. ● University degree in Information Technology ● Android Developer NanoDegree certificate ● 13+ years of software testing experience ● 3+ years of technical writing experience ● Worked on projects with known companies such as Google, Visa, SurveyMonkey, Sutter Health, Tempur-Pedic ● Experience creating and using scripting languages for automated testing ● Knowledge of Software Development Life Cycle (Agile/Scrum) and Software Testing Life Cycle ● Perform functional, regression, acceptance, new features, browser compatibility and performance testing ● Tested software applications on multiple mobile platforms ● Working knowledge of software testing methodology, tools, and techniques ● Write test documentation such as test plans, test cases, test matrices, check lists ● Write easy-to-follow bug reports, reproduce and verify bug fixes in new releases ● Able to multitask in high-pressure environment Recommendations from my LinkedIn profile: "Dmitry is a very professional QA expert. He is excellent at finding bugs especially on mobile apps and very knowledgeable, always sought the best solutions to problems. He is also open to learn new things, and is a quick learner. I will recommend him without hesitation. "Dmitry's work was exemplary. He helped me track down tricky bugs for several rush features with tight deadlines and vague specs -- QA's worst nightmare! He came through again and again. I couldn't have done it without him!" "I worked with Dmitry closely, testing complex virtual desktop management product: server and client parts both. During that time he showed a number of excellent technical and communication skills. Dmitry is a highly focused, conscientious and responsive member of the QA team. He is always available to help, troubleshoot complex issues and mentor anyone in the quality assurance team. Definitely consider Dmitry for your organization." "I've had a pleasure managing Dmitry as a QA Engineer at MokaFive. Dmitry represents such qualities as attention to details, dedication and the ability to find the root cause of the issue in the product. He is very focused on investigating the issues, debugging the problem and working closely with developers to improve the quality of software. Dmitry would be a great asset to any organization!" US Work Authorization: US Citizen Technical skills: Operating Systems: Windows 10/7/XP/2003, macOS, Linux Mobile Platforms: iOS, Android OS Mobile device automation: WebDriver, Appium, KIF, TestNG, JUnit, Allure Languages: Python, Java, Swift, UNIX Shell, HTML Networking: TCP/IP, FTP, HTTP, Internet, Intranet, Active Directory, Apache Virtualization: VMWare, Virtual Box, Virtual PC, VMware Infrastructure client Containerization: Docker Bug Tracking: Bugzilla, TestLink, Wiki, Asana, JIRA Debug tools: Wireshark, Procmon, Charles, Firebug Game testing: Unity Content Management: Wordpress, PHP-Nuke Other: Microsoft Office Suite, Wireshark, ProcMon Certifications: ● 2014: WebDriver, Selenium, Java, TestNG ● 2016: Android Developer Nanodegree ● 2019: Online teacher for OTUS platform (Mobile QA Engineer Course) Other languages: ● Fluent Russian (native speaker) ● Intermediate Spanish

Most AI projects die in the notebook. They work in a demo, break in production, and never ship. That's because building an AI feature is one skill. Shipping an AI product is a different one. I do the second part. I'm a full-stack engineer who specializes in AI products. I take your idea - a RAG chatbot, an AI agent, an LLM-powered SaaS - and turn it into a deployed, working application your users can actually log into. Frontend, backend, LLM layer, database, deployment. One person, one codebase, one timeline. What I build: → RAG chatbots that answer questions from your docs, PDFs, or knowledge base (LangChain, Pinecone/Weaviate, OpenAI, streaming responses, citations) → AI agents that actually do work - not just chat (LangGraph, AutoGen, tool-calling, multi-step workflows, human-in-the-loop) → AI-powered SaaS MVPs - the full product, not just the AI part (Auth, billing, dashboards, admin panels, Stripe, the whole thing) → LLM integrations into existing apps (Adding AI features to products you've already built) The stack I actually use day-to-day: Python (FastAPI), Node.js, Next.js, React, PostgreSQL, Pinecone, OpenAI / Anthropic APIs, LangChain, LangGraph, PyTorch, Docker, AWS. How I work: 1. We get on a 20-minute call. I tell you honestly whether your idea needs AI or if a simpler solution is better. (Half the time it's simpler.) 2. I scope a fixed deliverable with milestones - no open-ended hourly trap. 3. I ship in weekly increments so you see progress, not just invoices. 4. 30 days of free support after delivery. Bugs are on me. If you have a half-built AI prototype that needs to become a real product, or an idea that needs to go from zero to deployed send me a message with what you're trying to build. I'll tell you within a day whether I'm the right fit. Usman