Hire the Best Bootstrap Specialists

Clients rate our Bootstrap Specialists
Rating is 4.8 out of 5.
4.8/5
Based on 2,755 client reviews

Brijesh P.

Expert WordPress & Hubspot Developer | React JS Frontend Specialist

Jaipur, India
$18 per hour
1,009 jobs
$700K+ total earnings

I am a Senior Full Stack Developer with 12+ Years of experience in ( PHP, WordPress , DIVI, Elementor , Genesis Framework, LESS, SASS, React js, Mobile Applications, Web 3.0, Hubspot, Magento, Bigcommerce, Shopify theme development ), Application Development, and IT Consulting Services. You can contact me any PHP-related work either its API integration, Web services, Third-party integration , A site from PSD to HTML, PSD to WordPress, Wordpress Plugin Development , Magento 1 & 2 development. I am looking for Some business partner for long term relations beside of doing a search project by project and i understand that this is only possible if i will give them a proper communication, A Quality work output as long term business relation give comfort at both end. My main working skills Wordpress , Hubspot, Shopify, Advance Core PHP , Graphic design , Responsive web development, Strong knowledge of jQuery Javascript and right now am getting expertise in Node js. Here at Webgensis My main constraint is to built healthy relation with people around the world. As i am expert in Website development and have +12 year experience in this profession so my main focus to provide a quality work to people.

Maulik P.

AI Architect & Full Stack Developer | .Net, LLM, Claude, Python, React

Ahmedabad, India
$25 per hour
117 jobs
$100K+ total earnings

Available for quick fixes & long-term projects ✔︎ 100+ Projects Delivered | 6,000+ Hours on Upwork ✔︎ 10+ Years Experience Building Enterprise Applications & AI-Powered Platforms ✔︎ Specialized in AI Solutions, SaaS Platforms, Cloud Architecture & Full Stack Development ✔︎ Industries: Cybersecurity, Healthcare, Travel, eCommerce, Logistics, Real Estate, FinTech, Education & Biotech Are you looking for an AI architect and full stack developer who can build scalable systems with clean architecture, reliable execution, and long-term maintainability? For the past 15 years, I have helped clients build AI-powered platforms, SaaS products, and cloud applications, with deep expertise in backend architecture, AI integrations, API development, frontend engineering, and cloud deployment. Core Capabilities: - AI & Data Engineering: OpenAI, Claude, Gemini, LLMs, Generative AI, RAG, LangChain, LangGraph, LlamaIndex, AI Agents, Multi-Agent Systems, Prompt Engineering, LLM Orchestration, AI Automation, Semantic Kernel, OpenCV, Vector Search, Embeddings, Knowledge Bases, OCR Workflows, n8n, Vapi, Retell AI, ElevenLabs, Voiceflow, Twilio - Backend & Architecture: Python, FastAPI, Django, ASP.NET Core, .NET, C#, REST APIs, Web APIs, OpenAPI, Microservices, Entity Framework, Dapper, SQLAlchemy, Pydantic, Celery, Async Python, Azure Functions, JWT, OAuth2, Azure AD B2C, Node.js, Real-Time Systems, WebSockets, Clean Architecture - Frontend Development: React.js, Angular, Next.js, JavaScript, TypeScript, HTML5, CSS3, Tailwind CSS, Bootstrap, Responsive UI Development - Database & Caching: SQL Server, PostgreSQL, MySQL, MongoDB, Redis, ChromaDB, Qdrant, Vector Databases, Database Design, Query Optimization, Semantic Search - Cloud & DevOps: Microsoft Azure, AWS, Azure API Management, Azure Functions, Azure DevOps, GitHub Actions, Docker, CI/CD Pipelines, Deployment Automation, Cloud Architecture - Third-Party Integrations: REST APIs, OpenAPI/Swagger, Webhooks, OAuth2, API Authentication, MCP, Zoom, QuickBooks, SugarCRM, PayPal, Authorize.Net, Sabre, Expedia, Hotelbeds, Travel APIs, Umbraco, DNN, CKEditor, TinyMCE, WebSocket Integrations I am committed to doing things the right way no inflated promises. I deliver what is needed with precision, integrity, and a strong work ethic. If you have got a vision or challenge in mind, let’s connect. I am ready to listen, learn, and lay out a clear, actionable path forward. Thanks!

Jonas Carl L.

AI Integration Developer | CRM Automation | Full Stack & Bubble io

Caloocan City, Philippines
$40 per hour
13 jobs

I help startups and businesses build production-grade AI automations, custom CRMs, and scalable visual applications that eliminate manual operations. With a 100% Job Success Score and 1,800+ hours delivered, I bridge the gap between traditional software engineering and rapid application delivery—turning disjointed tools into unified, automated systems. 💡 Core Specializations • AI Integration & Autonomous Workflows: Connecting LLMs (OpenAI, Claude) to production software using tool calling, webhooks, and structured outputs to trigger real-world business actions. • Custom CRM & Operational Portals: Architecting purpose-built CRMs, technician dispatch systems, and internal portals with role-based access, automated notifications, and reporting dashboards. • Rapid App Development: Building scalable web applications using Bubble, FlutterFlow, and Xano—or custom full-stack solutions with Laravel and VueJS. • Workflow Automation & APIs: Connecting disparate platforms through Make, Zapier, Twilio, Stripe, Postmark, and custom REST API endpoints. 🧠 Proven Systems Built • Field Service & Dispatch CRM: Engineered a multi-role dispatch system featuring Google API integration, Twilio alerts, dynamic job statuses, and Zapier automations. • AI-Powered Web Platforms: Built custom applications integrating OpenAI APIs to deliver dynamic responses, automated asset generation, and structured user flows. • High-Volume Business Systems: Developed enterprise timekeeping, collections tracking, and customer management tools handling mission-critical data using Laravel and VueJS. ⚙️ Core Stack • AI & Automation: OpenAI API, Claude, Make, Zapier, Webhooks, RESTful APIs • No-Code & Visual Dev: Bubble, FlutterFlow, Glide, Xano • Engineering & Databases: Laravel (PHP), VueJS, JavaScript, MySQL, PostgreSQL • Third-Party Services: Twilio, Postmark, Stripe, Google APIs If you need to connect an AI workflow to your existing CRM, automate manual data entry, or build a scalable application from scratch, let's schedule a call to map out the architecture.

Satnam S.

Shopify Plus Expert | Figma Designer | Theme & Custom Development

Ballowal, India
$12 per hour
187 jobs

🏆 Top Rated Shopify Developer | Shopify Plus Expert | Custom Themes, Apps & CRO Looking for a Shopify expert who can build, customize, and optimize your store to increase sales? I help eCommerce brands, startups, and established businesses create high-converting Shopify stores that are fast, scalable, and designed for growth. With 10+ years of experience and 170+ successful Shopify projects completed, I deliver solutions that improve user experience, boost conversions, and support long-term business success. My Shopify Expertise: ✅ Shopify Store Setup & Configuration ✅ Shopify 2.0 & Shopify Plus Development ✅ Custom Shopify Theme Development ✅ Shopify Theme Customization (Free & Premium Themes) ✅ Shopify App Development (Public & Private Apps) ✅ Shopify API & Third-Party Integrations ✅ Shopify Speed & Performance Optimization ✅ Conversion Rate Optimization (CRO) ✅ Shopify Store Migration (WooCommerce, Magento, BigCommerce, Wix) ✅ Figma, Adobe XD & PSD to Shopify ✅ Landing Pages & Product Page Customization ✅ Shopify Subscription Setup (Recharge, Bold, Skio) ✅ Shopify Store Maintenance & Technical Support Technical Skills: • Shopify Liquid • JavaScript, jQuery • React.js, Node.js • PHP, Laravel • HTML5, CSS3, Tailwind CSS • REST & GraphQL APIs • Shopify Storefront API • Git & Version Control Why Clients Work With Me: ✔ 170+ Shopify Projects Successfully Delivered ✔ 10+ Years of Web Development Experience ✔ Shopify Plus & Advanced Customization Specialist ✔ Mobile-First & Conversion-Focused Development ✔ Clean, Scalable & Maintainable Code ✔ Fast Communication & Reliable Delivery ✔ Long-Term Support & Maintenance I can help you with: 🔹 Building a new Shopify store from scratch 🔹 Redesigning an existing Shopify store 🔹 Custom theme development and customization 🔹 Shopify app development and integrations 🔹 Store speed optimization and performance improvements 🔹 Shopify Plus custom solutions 🔹 Ongoing maintenance and technical support Whether you need a complete Shopify store, custom functionality, advanced integrations, or conversion-focused improvements, I can help you achieve your business goals. 📩 Send me an invitation, and let's discuss how we can grow your Shopify business. Keywords: Shopify Developer | Shopify Expert | Shopify Plus Developer | Shopify Designer | Shopify Store Development | Shopify Theme Developer | Shopify App Developer | Shopify Customization | Shopify Liquid Expert | Shopify Speed Optimization | Shopify API Integration | Figma to Shopify | Ecommerce Developer

How it works

Post a job for freePost a job

Tell us what you need. Create your own job post or generate one with AI then filter talent matches.

Hire top talent fast

Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.

Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

Payment simplified

Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.

Don't just take our word for it

Bootstrap 3: The Leading Responsive, Mobile-First Framework

Mobile-friendly, responsive websites are no longer good-to-haves—they’re must-haves. With more people than ever before opening email, browsing the web, and shopping on their mobile devices, it’s imperative to have a mobile-first mindset. If your site isn’t responsive and optimized for mobile browsing, your bounce rates will rise and your site ranking will drop. 

The most popular way to build responsive sites right now is with the Bootstrap framework. It’s lightweight, fast, and easy to use, but beyond that—what is Bootstrap, and why should you choose it as your front-end framework? In this article, we’ll look at responsive design and some of Bootstrap’s key features.

What is responsive design?

Responsive design creates websites that automatically adjust to look good and function well on any size screen. From navigation and the way content is organized, to buttons and image scalability, responsive sites are not only designed to optimize the way people see a site, but also to prioritize what information mobile users are there to get. For example, for a large retailer, prioritizing information about finding nearby stores makes sense for mobile users vs. desktop users. 

Why should I choose the bootstrap framework for my website?

So, you know you need a responsive mobile site. If your site wasn’t designed to be responsive, you’ll need to redesign or retrofit it. But if you’re planning to build a responsive mobile website or application from scratch, the Bootstrap framework is an excellent choice for a few reasons.

  • Just enough customization. Not all Bootstrap sites look like Bootstrap sites—meaning, how customized your site gets is up to you. On the spectrum of front-end design, with completely coded-from-scratch sites on one end and CMS-powered sites with dropped-in templates on the other end, Bootstrap falls right in the middle. It’s the best of both worlds: A lot of the work is already done in advance, with the grid system and lots of helpful components. And with JavaScript effects and customizable Bootstrap CSS, it’s as unique as you want it to be.
  • A mobile-first, ground-up grid approach. Bootstrap gets designers to start small. If a site looks good on a small screen, it’s easy to scale it up from there, without things getting cluttered. A top-down approach in mobile design is counterintuitive; Bootstrap reinforces that, so sites stay clean and logical on the smallest screens. Bootstrap forces designers to build sites with small screens in mind, then go from there. Bootstrap’s grid-based layout approach is the key: you can use up to 12 columns in a layout, combining them for wider columns, which are organized in layout classes—extra small, small, medium, and large for phone, tablet, and desktop-sized screens.
  • It’s fast and easy to use. Bootstrap lets developers (even back-end developers) build front ends without a ton of HTML or CSS knowledge. Whether you’re applying Bootstrap to a static HTML site, a custom PHP-coded site, or a content management system (CMS), it’s flexible. Plus, it’s downloadable right from GitHub and lets developers get a lot of work done quickly.

Bootstrap 3 basics

Bootstrap is a front-end framework that builds responsive, mobile-first websites. With a mobile-first approach at its core, its grid system forces designers to create sites for small screens, then scale designs up from there.

It uses a mix of HTML5 markup, compiled and minified CSS styling, fonts, and JavaScript. Bootstrap CSS is customizable, and even supports Less and Sass pre-compiled CSS, in addition to plain CSS files. Other highlights:

  • What you can do with Bootstrap
    • Create transition effects, image galleries, image carousels, alert messages, tooltips, dashboards, sticky footers, buttons, progress bars, popovers, pagination, drop-down menus, cover pages, and the ScrollSpy plug-in, which automatically updates a nav bar for the user, depending on where they are on the page.
  • Variety of templates 
    • Bootstrap design templates include features like typography, forms, buttons, tables, different navigation styles, modals, and more.
  • Convenient layout classes
    • These consist of Large (desktops), Medium (smaller desktops or laptops), Small (tablets), and Extra Small (mobile phones), which include containers, rows, and up to 12 columns that can be combined to make larger columns. Bootstrap lets you start out with stacked layouts (for mobile devices) that migrate to horizontal, for desktop versions.
  • The convenience of Grunt
    • Grunt is a JavaScript task runner that’s all about automation. It handles repetitive tasks like compiling, “magnification,” and unit testing, so your team doesn’t have to.
  • Browser compatibility
    • It’s compatible with Chrome, Firefox, Internet Explorer 8 and up, Safari, and Opera. Note: Bootstrap will degrade some of its features by default to work on older browsers.
  • The Bootstrap Markup API
    • Bootstrap’s all-around best API that lets you use every JavaScript plugin without writing a single line of JS code.
  • Open source
    • Download Bootstrap from GitHub and link it right into a site’s HTML file.
  • CSS pre-processors
    • Bootstrap lets you use both the Sass and Less CSS pre-compilers.
  • Easy JavaScript extensions
    • JavaScript plugins can be downloaded in just one file. To use Bootstrap with JavaScript add-ons, just reference the jQuery library in the HTML. It’s also got custom jQuery plugins that can be used individually, or compiled and minified.
  • Compatible with Bower
    • Bootstrap can be installed with Bower, a powerful package manager that helps you manage all the parts of your website like libraries, frameworks, utilities, and more.