Daniel Teo

I can work on .NET and C# applications, including backend development, bug fixing, database integration, API development, desktop or web application maintenance, and legacy system support. I can also help with VB-based systems and gradual modernization.

I can support legacy .NET Compact Framework projects, including maintenance, debugging, UI updates, integration fixes, and migration planning. I am comfortable working with older codebases and helping clients modernize or stabilize existing business applications.

I have strong experience using AJAX for dynamic page updates, form submissions, API calls, live search, filters, dashboards, and interactive UI features without full page reloads. I can work with vanilla JavaScript, jQuery, React, PHP, and Node.js backends.

I can maintain and improve classic ASP and ASP-based legacy websites, including bug fixing, form handling, database integration, performance improvements, and migration support. I can help modernize older systems while keeping existing business logic stable.

I can build, maintain, and improve ASP.NET web applications, including backend logic, database integration, API development, authentication, admin panels, and bug fixing. I can also support legacy ASP.NET projects and help modernize them step by step.

I have strong experience building responsive, clean, and modern websites using HTML5, CSS3, and JavaScript. I focus on semantic structure, mobile-first layouts, interactive UI, cross-browser compatibility, performance, SEO-friendly markup, and maintainable frontend code.

I can work with Java for backend development, application maintenance, API integration, debugging, and object-oriented programming tasks. I can support existing Java applications and help improve performance, structure, and reliability.

I have experience with PHP development for dynamic websites, backend logic, forms, CMS customization, ecommerce workflows, API integrations, database operations, and bug fixing. I can work with both custom PHP code and platforms like WordPress or Shopify-related integrations.

I write scripts to automate repetitive tasks, process data, integrate APIs, scrape structured information, generate reports, and improve internal workflows. I have experience with JavaScript, Node.js, Python, PHP, Bash, and automation-focused development.

I use Python for scripting, automation, backend tasks, data processing, API integration, scraping support, file handling, and workflow automation. I can create reliable scripts that save time, reduce manual work, and connect different systems together.

I can support Android-related development tasks, including responsive mobile app interfaces, API integration, bug fixing, and web-to-mobile functionality. I am especially strong in connecting mobile apps or mobile web experiences with backend services and databases.

I can work with jQuery for existing websites, legacy systems, dynamic UI behavior, AJAX features, sliders, forms, modals, validation, and plugin customization. I can also refactor older jQuery code into modern JavaScript or React when needed.

I can build Chrome and browser extensions using JavaScript, React, browser APIs, background scripts, content scripts, storage, authentication, and API integrations. I can create tools for automation, scraping support, productivity, ecommerce, and dashboard workflows.

I develop backend services and APIs using Node.js, Express, REST APIs, authentication, database integration, payment integrations, automation scripts, and server-side business logic. I focus on clean architecture, security, scalability, and reliable backend performance.

I can maintain, debug, and improve AngularJS applications, including legacy frontend updates, component fixes, API integration, performance improvements, and migration planning to modern frameworks like React, Next.js, or newer Angular versions.

I am a senior full-stack developer with experience building complete web applications from frontend to backend. I can handle UI development, APIs, databases, authentication, admin dashboards, ecommerce features, third-party integrations, deployment, debugging, and long-term maintenance.

I build modern React.js applications with reusable components, clean state management, API integration, responsive UI, forms, dashboards, authentication flows, and performance optimization. I can also work with TypeScript, Next.js, Tailwind CSS, and modern frontend architecture.

I build dynamic websites with admin panels, databases, user accounts, APIs, forms, dashboards, and real-time content updates. I can handle both frontend and backend development using modern stacks like React, Next.js, Node.js, PHP, and databases.

I create clean, professional, and responsive business websites, portfolios, service pages, and landing pages. I focus on fast delivery, modern design, mobile responsiveness, SEO-friendly structure, contact forms, and clear call-to-action sections.

I build and improve ecommerce websites with payment integrations such as Stripe, PayPal, and other checkout solutions. I can work on product catalogs, carts, checkout flows, order management, payment setup, API integrations, and conversion-focused improvements.

I develop responsive mobile-first websites and web apps that work smoothly across phones, tablets, and desktops. I focus on fast loading, touch-friendly UI, clean layouts, and modern frontend practices using HTML, CSS, JavaScript, React, and Next.js.

I have strong experience building and customizing Shopify stores, including theme development, Liquid templates, product pages, cart/checkout improvements, app integrations, payment setup, speed optimization, and responsive design. I can also fix bugs and improve conversion-focused ecommerce workflows.

I use Bootstrap to create clean, responsive, and mobile-friendly websites quickly. I can build landing pages, admin panels, forms, dashboards, and reusable UI sections while customizing Bootstrap components to match the client’s branding.

I build and improve ecommerce websites with payment integrations such as Stripe, PayPal, and other checkout solutions. I can work on product catalogs, carts, checkout flows, order management, payment setup, API integrations, and conversion-focused improvements.

I convert PSD, Figma, XD, and image-based designs into pixel-perfect, responsive HTML/CSS pages. I focus on clean code, cross-browser compatibility, mobile responsiveness, optimized assets, and accurate spacing, typography, and layout.