Hire the Best Load Testing Engineers in California

• 15+ years of experience in automated and manual testing of web, mobile, desktop, SaaS, and AI applications. • Expertise in building test automation frameworks from scratch, incl. Cypress, Playwright, and Selenium. • Expert in developing test plans, creating test cases, investigating software defects, creating bug reports. ⭐ 1st US QA expert on UpWork to earn Expert-Vetted (Top 1%) badge*. 100% Job Success score. • Strong background in implementing QA methodologies and creating detailed test documentation. • Experienced with functional, usability, UAT, regression, cross-platform, API, security, and load testing. • Skilled in test management, issue/bug tracking tools, visual testing tools, and test environments. • Experienced in using AI tools to enhance the speed and coverage of manual and automated testing. • In-depth knowledge of SDLC, STLC, Agile/Scrum, Waterfall, UI/UX and accessibility best practices. • Proficient in programming and scripting languages, and databases. • Hands-on experience with version control, CI/CD, and cloud environments. • Prior experience as a Web Developer and ERP Engineer. CORE TECHNICAL SKILLS Test automation: Cypress, Playwright, Selenium WebDriver, Postman, Appium, JMeter, Testim, JUnit, TestNG, Mocha, Chai.js. Test management: TestRail, QMetry, Azure Test Plans, qTest, Tuskr, Testiny, Testmo, Xray, Zephyr. Issue and bug tracking: Jira, Azure DevOps, ClickUp, Trello, GitLab, Bugzilla, Linear, BugHerd, Asana. Languages: JavaScript, TypeScript, Java, Python, HTML, XML, CSS, SQL, XPath. AI tools: GitHub Copilot, OpenAI Codex, Playwright MCP, Cypress Prompt, Testim, Tabnine. Databases: MSSQL, Oracle, MySQL, PostgreSQL. Other: React, Vue, Next.js, Node.js, Angular, AWS, Azure, Docker, Jenkins, GitHub, CircleCI, Git, WordPress, Figma, BrowserStack, Mailosaur, Linux, Windows, macOS, iOS, Android. * Expert-Vetted badge is visible only to Upwork's Enterprise and Business Plus plan clients; others see my Top Rated Plus badge.

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

Top-Rated QA Tester with 100% Job Success Score. I specialize in manual testing for websites and mobile apps — finding the bugs that automated tools miss. I deliver clear, organized bug reports with exact steps to reproduce, so your dev team can fix issues fast. Fast turnaround, thorough testing, zero fluff.

I build real systems for real companies not templates, not demos. If you need a full-stack web app, an AI-powered SaaS platform, or a machine learning feature shipped right the first time, you're in the right place. ━━━━━━━━━━━━━━━━━━━━ WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━ ✦ AI & Machine Learning LLM apps · RAG pipelines · NLP · Chatbots · AI agents Claude · GPT · OpenAI API · LangChain · vector databases Recommendation engines · predictive models · data processing ✦ SaaS Platforms & Web Apps Next.js · React · TypeScript · Tailwind CSS ✦ Python Backends FastAPI · Django · Flask ✦ Node.js APIs Express · NestJS · REST · GraphQL ✦ Cloud & DevOps AWS · Docker · CI/CD · Vercel · scalable infrastructure ✦ Databases PostgreSQL · MongoDB · Supabase · Redis ━━━━━━━━━━━━━━━━━━━━ PROVEN RESULTS ━━━━━━━━━━━━━━━━━━━━ → Built an AI dermatology treatment recommendation system (Python + SQL) that improved clinical decision-making → Developed an NLP chatbot with Botpress for automated client interactions → Delivered a full MERN-stack website redesign for a high-traffic platform → Engineered a civic-tech MVP (React + TypeScript) for real-time consensus building → Reduced system failure rates by 70% through rigorous testing on enterprise apps ━━━━━━━━━━━━━━━━━━━━ Why clients keep working with me: - Clear communication and on-time delivery (100% Job Success) - Production-grade, tested, scalable code - I take ownership you get a partner, not just a coder → Message me for a free 15-min consultation. Let's build something great.

📣 FREE technical consultation (details below) 🐻 Proud UC Berkeley graduate (Applied Mathematics & Economics) and an entrepreneurial, reliable full-stack software developer with broad expertise across modern technologies (listed below). 💪💪💪 With experience as: • Full-Stack Team Lead at Camping World, a publicly traded company • Lead Technical Teaching Assistant at Hack Reactor, a leading software engineering bootcamp • Founder of Atini Studio, a high-performance software development agency With years of experience working with clients and leading engineering teams, I prioritize accountability, clear communication, and efficient execution. 🌈🌈🌈 I’m the founder of Atini Studio, a vibrant software development agency and a team I like to call software doctors: highly skilled engineers and creative UI/UX designers who diagnose, fix, and elevate digital products. ⌨️⌨️⌨️ What I help clients with: 📌 MVP development for startups 📌 Full-stack web applications 📌 Cross-platform mobile apps 📌 AI-powered features & integrations 📌 Clean implementation from Figma to production 📌 API integrations (Stripe, OpenAI, Google, Zoom, etc.) 📌 Performance optimization 📌 Technical architecture planning 📌 Product roadmap & scaling strategy We also leverage AI internally to accelerate development workflows and improve efficiency, so you get faster delivery without sacrificing quality. 🧩 Complimentary Technical Consultation Not sure how to move forward with your product? I can help you clarify: • The right tech stack • MVP scope • Timeline and budget expectations • System architecture decisions • Whether your current product is built correctly I offer a complimentary strategy session to help you create a clear and practical execution plan. 💻 Tech Stack: • Front End JavaScript | TypeScript | React | Next.js | React-Native | Angular | Vue.js | Tailwind CSS • Back End Node.js | NestJS | Python | Django | PostgreSQL | MongoDB | MySQL | ORM | GraphQL • API Integrations ChatGPT / OpenAI | Stripe | Google | Zoom | and more... • DevOps Amazon Web Services (AWS) | Firebase/GCP(Google Cloud Platform) | Azure | Docker • Testing Jest | Mocha | TDD • Developer Tools Git | npm | Webpack | Babel | Agile Methodology | Nginx • Design Adobe XD | Figma

With over 20 years of extensive experience in software development, a strong foundation in a variety of programming languages, and a proven track record in delivering efficient and scalable software solutions, I am confident in my ability to contribute effectively to your team. I specialize in full stack development, data engineering, database design, cloud migration, API integrations, and enterprise application modernization. My main technical strengths include .NET, C#, React, Angular, SQL Server, PostgreSQL, AWS, Azure, ETL, SSIS, Power BI, Tableau, Docker, Kubernetes, and microservices. Throughout my career, I have worked with healthcare, fintech, government, aviation, and enterprise clients. I have built web applications from the ground up, optimized slow systems, designed data warehouses, created ETL pipelines, developed reporting dashboards, migrated legacy systems to modern cloud platforms, and led development teams through full project lifecycles. I can help with: • Full stack web application development • NET / C# backend development • React / Angular frontend development • SQL Server / PostgreSQL database design • ETL, SSIS, data warehouse, and reporting • AWS / Azure cloud deployment and migration • API integrations and microservices • Power BI, Tableau, and Grafana dashboards • Legacy system modernization and performance optimization I am comfortable working independently or as part of a team, and I can take a project from requirements gathering and architecture through development, testing, deployment, and ongoing support. My goal is always to build solutions that are secure, scalable, reliable, and easy to maintain.