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Hi, I’m Mike, a Senior Frontend Engineer with 10+ years of experience building scalable, high-performance web applications using React, Next.js, and Angular. I work with SaaS companies, startups, and enterprise teams to turn designs into fast, maintainable, and user-friendly interfaces that scale with real business needs. Core Expertise & Technologies Frontend Development - JavaScript (ES6+), TypeScript, HTML5, CSS3 - React, Next.js, Angular, Gatsby - Component-driven architecture and design systems - Responsive and accessible UI development - Styling & Collaboration - Styled-components, CSS Modules, Tailwind, Bootstrap - Git, GitHub / GitLab, agile team workflows - Code Quality & Performance - I focus on clean, modular, and maintainable code with strong attention to performance, accessibility, and long-term scalability. - Test-Driven Development using Jest, Mocha, and Sinon - End-to-end testing with Selenium and Protractor - Cross-browser and cross-device validation - AI & LLM Integration Experience In addition to frontend development, I have hands-on experience integrating AI and LLM features into production web applications, including: - Chat and support interfaces using OpenAI / GPT APIs - Context-aware UIs for summarization, classification, and content generation - Secure prompt handling, token optimization, and function calling - AI-assisted workflows and internal tooling I focus on practical, secure, and performant AI integrations that improve real user experiences. What I Bring to the Table - Modern, scalable React and Next.js frontends - Pixel-perfect implementation from design specs - Performance and UX improvements - Clear communication and reliable delivery - Frontend development with optional AI integration expertise Clients looking for a senior React or Angular developer, especially with AI integration experience, will find my skill set well suited to modern web applications. Let’s connect and discuss how I can help bring your product to life. Mike Taatgen

With 9 years in business ownership and varying experience spanning 11 years in web development and project management, I'm able to bring a unique perspective to your product in addition to software solutions. In my last W2 role as Senior Engineer - Frontend, I delivered enterprise legacy maintenance, extension, and greenfield development for Fortune500 companies through my 200 person employer. PG&E, Bank of America, Johnson & Johnson, Lumen, Southwest Airlines, and many other companies have used my software implementations and fixes. I've led teams, managed scrums, collaborated cross functionally, co-founded an international programming bootcamp and startup accelerator, ran a software agency, and freelanced after obtaining my A.A. in Web Design & New Media from Academy of Art Academy in San Francisco. Currently, I am pursuing long term part time ~20 hour a week web application development as I self manage real estate. My career background is roughly 70% Frontend, 30% Backend. Javascript, Python Please see my github and not the Upwork portfolio as these are from many years ago. Working W2 I am not allowed to display the work, unfortunately. Here are a few reviews from prior clients who have worked with me: It was an absolute pleasure to work with Michael. He went beyond his call of duty during the time he worked on developing our website. It really felt like having an extra-team member who is committed to the project as much as we were. He constantly came up with great ideas and was very patient when we changed the scope of the project. I really appreciated Michael's skill, commitment, creativity, professionalism and communication skills. I highly recommend Michael! Sham Mustafa CEO, Correlation One (Softbank Funded Data Science Company) As a co-founder and director, Mike has been pivotal in ensuring that our non-profits financials are sound. He has been proven capable of wearing multiple hats. He has lead marketing, design and development work and has mentored all of our engineers during the training program. I absolutely trust him to execute without fail and produce high quality work. Uche Nnadi CEO, Enye Inc (501(c)(3) International Tech Charity) This is my second project with Michael, and I'd definitely hire him again! He's a total WordPress pro and was quickly able to bring a broken and very old site back to reasonable functionality (which was the goal of this project). He's also super easy to work with remotely, as he's a friendly, responsive and clear communicator. Additionally, he has excellent diagnostic skills, which made it easy to understand the site's issues and how much investment was worthwhile. Highly recommended. Deborah Schatten Senior Director of Marketing, Brandese (SF Bay Area Marketing Company) Let's have a call and get your ideas off the ground, Michael Paccione Colorado Springs, CO

Need a Wix website that looks professional, works perfectly on mobile, is easy to navigate, and actually helps your business generate leads, bookings, customers, or sales? I’m a Wix Website Designer and Wix Expert specializing in Wix website design, Wix website redesign, Wix development, Wix Studio, Wix SEO, responsive design, UI/UX, eCommerce, landing pages, integrations, and ongoing Wix website support. Whether you need a Wix website built from scratch, an existing Wix website updated and improved, a complete Wix redesign, a responsive website built from a mockup, or help fixing a Wix issue, I can help you turn your requirements into a polished, professional website. WHAT I CAN HELP YOU WITH • Wix Website Design & Development • Wix Website Redesign & Website Revamp • Wix Studio & Wix Editor • Wix Business & Service Websites • Wix Landing Pages • Wix eCommerce & Online Stores • Wix Responsive & Mobile-Friendly Design • Wix UI/UX & Navigation Improvements • Wix SEO & On-Page SEO • Wix CMS & Dynamic Pages • Wix Forms, Bookings & Lead Capture • Wix Payments & Third-Party Integrations • Wix Velo & Custom Functionality • Wix Website Updates, Fixes & Troubleshooting • Wix Performance & Website Optimization • Wix AI-Assisted Website Building & Improvements IF YOUR EXISTING WIX WEBSITE NEEDS WORK I can update an existing Wix website without unnecessarily rebuilding everything. That can include improving the layout, updating content, fixing spacing and responsiveness, reorganizing navigation, improving the look and feel, adding new sections or pages, fixing functionality, improving calls-to-action, connecting forms or integrations, and making the website easier for you to manage. My goal is not simply to make a Wix website “look better.” I look at how the website works for real visitors. MY WIX WEBSITE DESIGN APPROACH I focus on: ✓ Clean, modern and professional design ✓ Responsive desktop, tablet and mobile layouts ✓ Clear navigation and user experience ✓ Strong page structure and calls-to-action ✓ Conversion-focused layouts ✓ SEO-friendly page structure ✓ Fast, easy-to-manage Wix websites ✓ Consistent branding and visual hierarchy ✓ Proper testing before launch If you already have a completed mockup, reference website, Canva design, existing website, brand guide, content, or template, I can translate that direction into a functional Wix website while preserving the intended look and user experience. I can also work with Wix templates and AI-assisted workflows when they make sense for the project, while still customizing the final website so it doesn't feel generic. WIX DEVELOPMENT & CUSTOMIZATION For projects that require more than standard Wix editing, I can work with Wix CMS, dynamic pages, forms, integrations, Velo, custom functionality, third-party tools, domain/DNS setup, and website troubleshooting. I can also help with smaller Wix tasks such as: • Fixing an existing Wix website • Updating pages and content • Adding new sections • Improving mobile responsiveness • Creating or updating landing pages • Setting up forms and bookings • Connecting payment or third-party tools • Improving SEO titles and meta descriptions • Fixing layout and functionality issues • Preparing a website for launch • Providing ongoing Wix website support WIX SEO & WEBSITE OPTIMIZATION A Wix website should not only look good. It should make it easy for visitors and search engines to understand the business. I can help optimize page structure, headings, titles, meta descriptions, image alt text, internal linking, content organization, mobile presentation, calls-to-action and other basic on-page SEO elements. WHO I WORK WITH I work with businesses, startups, entrepreneurs, consultants, professionals, service providers, eCommerce brands, nonprofits, creatives, personal brands and growing companies that need a stronger Wix website. Whether you need a simple Wix website, a complete Wix redesign, a Wix Studio website, an eCommerce store, a landing page, a responsive website from an existing design, or ongoing Wix support, I can adapt the project to your needs. WHY CLIENTS HIRE A WIX EXPERT You shouldn't have to explain basic Wix functionality repeatedly or micromanage every detail. I focus on understanding the brief, working within your existing Wix setup when appropriate, communicating clearly, paying attention to details, and delivering a website that is practical for both you and your visitors. If you already have an existing Wix website, send it over. If you have a design or reference, send that instead. Tell me what you want to build, redesign, fix or improve, and I'll help you determine the best Wix approach. Wix | Wix Website Design | Wix Website Designer | Wix Expert | Wix Redesign | Wix Development | Wix Studio | Wix Editor | Wix SEO | Wix eCommerce | Wix Landing Page | Wix Responsive Design | Wix UI/UX | Wix CMS | Wix Velo | Wix Forms | Wix Bookings | Wix Integrations | Wix AI

I'm a NY/Chicago based software engineer looking to build relationships with B2B and B2C brands. - Hydrogen, Liquid, Next.js, Stencil, Vue Storefront - Sanity, Contenful, Wordpress, Hubspot - LAMP, or MERN stack - Klaviyo, Active Campaign, SendGrid - Salesforce, Acumatica, Zoho, HubSpot, SAP - Algolia, Elastic, Nosto, Searchspring - AWS, Azure, Google APIs

Hello, I'm Mark! 👋 I'm a Senior Full Stack Developer with 5+ years of professional experience building production web, mobile, and backend applications. I specialize in React, React Native, and Node.js, helping startups and businesses turn ideas into scalable, production-ready software. I've worked independently and alongside development teams to build everything from startup MVPs to production applications used by thousands of users. I've spent the past two years as a core developer on a production healthcare platform, building frontend, backend, mobile, and real-time features while working directly with startup leadership. Previous projects include a healthcare data portal for an Upwork Enterprise client and a collaborative whiteboard application with built-in messaging and video calling. While JavaScript is my core expertise, I've also built backend systems in Python and PHP, desktop applications with Electron, and deployed production applications to AWS, Azure, and DigitalOcean. My goal is to provide practical, scalable solutions while maintaining excellent communication throughout every project. Here's what I bring to the table: ⭐ Top Rated Plus – Top 1% of talent on Upwork with a 100% Job Success Score and a history of long-term client relationships. 🚀 End-to-End Product Development – I build complete web and mobile applications from frontend to backend, database, deployment, and production support. 📱 React & React Native Expertise – Strong experience developing production applications with React, React Native, Redux, Zustand, Next.js, Express, and Typescript. 🔗 API & Backend Development – Design and build REST APIs, authentication systems, real-time applications, and integrations with third-party services. 🎨 Clean, Responsive UI – Build fast, responsive, pixel-perfect interfaces using Material UI, Tailwind CSS, HTML, CSS, and modern frontend best practices. 🤝 Communication & Reliability – Clients appreciate clear communication, realistic timelines, and clean, maintainable code that other developers can easily work with. My Work Approach: I believe great software comes from clear communication, realistic expectations, and clean, maintainable code. I keep clients updated throughout development, ask questions early to avoid surprises, and focus on delivering solutions that are reliable, scalable, and easy to maintain. Skills: ✔️ Frontend: React, React Native, Next.js, JavaScript, TypeScript, HTML, CSS, Material UI (MUI), Tailwind, Electron, WordPress ✔️ Backend: Node.js, Express, Python (Flask), PHP (Laravel), Socket io, REST APIs, OAuth, Azure AD ✔️ Databases: MySQL, MongoDB, SQL Server, DynamoDB ✔️ Cloud & DevOps: AWS, Azure, DigitalOcean, GitHub Actions Ready to get started? Next steps: 1. Invite me to your job or send me a message 2. I will send my proposal 3. We’ll iron out all the requirements and expectations 4. I’ll get the work done professionally to ensure you love the end result If you're looking for a developer who communicates well, writes clean code, and takes ownership of projects, I'd love to discuss how I can help!

Hello Hiring Manager, I help organizations navigate ongoing accessibility lawsuits through detailed accessibility audits /testing. I’m a U.S. Government CERTIFIED accessibility auditor and have audited 250+ web and mobile applications and 2,000+ documents, delivering accurate audits, precise remediation, and government grade VPAT documentation. PROJECTS / CLIENTS NJ State Parks | Salesforce | Boston University | CVS | Marks & Spencers | Teeter Inc | Protegrity Inc | Zenva Schools Australia | Hawkes Learning | dialogEDU | Bigger Brains eLearnings | Epic Instructions LLC | Agent Methods Insurances | King Fish and Partners | Voice Hive CRM | TransPerfect | Latitude Prime ACCESSIBILITY SKILLS AND QUALIFICATIONS: • Participate in the analysis and documentation of testing requirements. • Comprehensive accessibility audit and defect reporting in accordance with WCAG 2.1. • Experience with screen readers such as JAWS, NVDA, and TalkBack for Android, VoiceOver for iOS. • Expert in using automated tools like TPGi ARC, Deque Axe, AMP, Google Lighthouse, Wave, SiteImprove, and ANDI. • Understanding other assistive technology like screen magnifiers, adaptive switches, and speech recognition systems. WCAG/ARIA CODDING AND TECHNICAL SKILLS: • Scripts – WAI-ARIA, HTML5, CSS3, ReactJS, Angular, JavaScript, jQuery, ASP Net, and Java. • CMS – WordPress, Joomla , Drupal, Wix, Shopify, Squarespace, Webflow, and many more. • Accessibility Testing Tools – JAWS, NVDA, Voice Over, Talk Back, Apple Xcode, Lighthouse, TPGi ARC, Deque Axe, Wave, ANDI, Acrobat PDF Test. and CCA. • Accessibility Documentation – VPAT | ARC | A11Y Design Guideline | Technical Recommendation Guide | Accessibility Finding Dashboard. My experience in accessibility testing, design, code remediation, reporting, and my ability to develop innovative solutions and present them to cross-functional teams and product stakeholders will add value to the overall product portfolio. I look forward to discussing this position with you further. Regards, Sana Kapasi Lansdale, PA 19446  MY ACCESSIBILITY TESTING PROCESS: 1. Use automated tools like Deque Axe, ARC Toolkit, UsableNet, and Wave for initial issue detection, saving time and cost. 2. Conduct manual keyboard tests to check tab order, focus, and content layout. 3. Perform screen reader tests using NVDA & JAWS (Windows), VoiceOver (MacOS and iOS), and TalkBack (Android) for vision-impaired user issues. 4. Review Semantic HTML/ARIA code for full accessibility compliance. 5. Analyze color contrast to address color-related accessibility concerns. 6. Compile an audit report detailing necessary fixes and remediations. 7. Assist content editors and developers in resolving accessibility issues. 8. Repeat the process for all documents and web pages to ensure complete accessibility. 9. Provide VPAT documents to confirm clients' full accessibility compliance.