Hire the Best CSS3 Developers
in Sri Lanka

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
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Kasun K.

Kotte, Sri Lanka

$35/hr
4.9
188 jobs

Senior Software Engineer | 15+ Years of Experience in Web & Mobile Development As a seasoned software engineer with over a decade of experience in web and mobile development, I bring a deep understanding of the latest technologies and best practices to every project. My continuous learning and hands-on experience with complex projects ensure that I know exactly how to choose the right technologies and strategies for your specific needs. I am committed to delivering high-quality work, leveraging my extensive experience to ensure the success of your project. Your satisfaction and the success of your project are my top priorities

  • CSS
  • CSS 3
  • MySQL
  • Java
  • JavaScript
  • HTML5
  • iOS Development
  • Android App Development
  • Flutter
  • Advertisement
  • GSAP
  • HTML
  • Lottie
  • Webflow
  • Google Web Designer
  • jQuery
Kalana H.

Colombo, Sri Lanka

$20/hr
5.0
247 jobs

Looking for a Squarespace developer who can build a high-performing, visually stunning, and SEO-optimized Squarespace website? With 7+ years of experience and 450+ successful projects, I specialize in custom Squarespace design, development, and Squarespace SEO that helps businesses rank higher and convert better. What I do: ✅ Squarespace Design & Development - Custom and unique layouts. ✅ Online Booking & Scheduling Websites - Custom integrations for service-based businesses. ✅ Squarespace SEO Optimization - On-page SEO, technical fixes, and structured data to drive organic traffic - including SEO for CPG brands and product-led stores. ✅ E-Commerce Squarespace Stores - Build seamless, conversion-driven Squarespace shops. ✅ High-Converting Squarespace Landing Pages - Built to capture leads and turn visitors into customers. ✅ Squarespace ConvertKit Integration - Connect email opt-ins, automations, and signup forms to grow your list. ✅ DNS & Domain Setup on Squarespace - Smooth DNS configuration, domain connection, and email routing done right. ✅ E-Commerce Stores - Conversion-driven Squarespace shops with booking & scheduling. ✅ Squarespace 7.1 Migration - Seamless moves from WordPress, Wix, or Squarespace 7.0. ✅ Figma to Squarespace - Pixel-perfect builds tailored to your brand. ✅ HTML to Squarespace - Make your HTML files into a complete Squarespace website Why work with me: 💡 Official Squarespace Circle Member (insider knowledge & early access) 💡 7+ years and 450+ successful Squarespace web design & development 💡 Reliable, on-time, high-quality delivery 💡 100% satisfaction guarantee 💡 6 months of post-project support Whether you need a stunning Squarespace website, expert Squarespace SEO, a high-converting landing page, a clean ConvertKit setup, or a smooth migration - I've got you covered. 🔹 Ready to launch your online store? 🔹 Need a high-converting business website? 🔹 Want to rank higher on Google with expert SEO? 💬 Send me a message now and let's bring your vision to life today!

  • CSS
  • Squarespace
  • Web Development
  • SEO Keyword Research
  • Search Engine Optimization
  • Website Redesign
  • Page Speed Optimization
  • Web Design
  • Landing Page Design
  • Custom Web Design
  • CMS Development
  • No-Code Website
  • Ecommerce Website Development
  • Web Development Consultation
  • Landing Page
  • No-Code Landing Page
  • HTML
  • Website Builders & CMS Consultation
  • Website Builder
  • On-Page SEO
Jalina H.

Kaduwela, Sri Lanka

$8/hr
5.0
7 jobs

I’m a full-stack developer specializing in both web and mobile application development. On the mobile side, I primarily work with Flutter and have built and published multiple apps on the Google Play Store. I also have experience developing cross-platform apps for real-world use. On the web side, I work with React and Node.js to build scalable, user-friendly applications, including dashboards and full-stack systems. I’ve worked with databases like PostgreSQL and MongoDB to deliver complete end-to-end solutions. I focus on clean code, performance, and building products that are reliable and easy to use.

  • CSS
  • JavaScript
  • HTML
  • React
  • Next.js
  • Tailwind CSS
  • Flutter
  • Node.js
  • MongoDB
  • SQL
Mohamed I.

Nawalapitiya, Sri Lanka

$20/hr
5.0
15 jobs

🚀 Welcome to My Upwork Profile! I’m a Top-Rated Senior UI & Full-Stack Engineer with over 1300+ hours of successful Upwork projects and a decade of experience in front-end and full-stack development. Originating from Sri Lanka, I specialize in crafting high-performance web applications with cutting-edge technologies. 💡 My Expertise: ✔ Front-End Development – HTML5, CSS3, SCSS, SASS, LESS, Tailwind CSS, Bootstrap 4/5, Responsive Design, BEM Methodology ✔CMS – Wordpress, Framer ✔ JavaScript Ecosystem – Angular (4+), AngularJS, React/Redux, Next.js, Redux, Zustand, RxJS, TypeScript, ES6, WebSocket, REST APIs ✔ Back-End Development – Node.js, Express.js, Firebase, MongoDB, PostgreSQL ✔ Generative AI & AI Integration – build,io, OpenAI (ChatGPT), LangChain, LangGraph ✔ Real-Time & Cloud Services – WebSocket, Firebase, AWS 🔥 What I Bring to the Table: 🔹 Full-Cycle Development – From ideation to complex UI applications 🔹 Seamless AI Integration – Enhancing user experiences with Generative AI 🔹 Scalable & Performance-Optimized Solutions – Ensuring speed, security, and responsiveness 🔹 Team Collaboration & Leadership – Supporting teams and mentoring developers 📩 Let’s Build Something Amazing! If you’re looking for a dedicated developer to bring your project to life with modern UI, full-stack expertise, and AI-driven solutions, let’s connect!

  • CSS 3
  • JavaScript
  • HTML
  • React
  • TypeScript
  • Figma
  • Bootstrap
  • Sass
  • Adobe Photoshop
  • Angular
  • WordPress
  • Redux
  • AngularJS
  • Web Development
Maduranga P.

Divulapitiya, Sri Lanka

$20/hr
4.9
727 jobs

I'm a experienced web developer. Not only websites I develop desktop applications and mobile applications for Android OS. My aim is to deliver high quality products for my clients.

  • CSS
  • CSS 3
  • JavaScript
  • WordPress
  • HTML5
  • JSON
  • AJAX
  • HTML
  • jQuery
  • PSD to HTML
  • English
  • MySQL Programming
  • ClickFunnels
  • Email Template Development
  • Shopify
Pabasara F.

Polonnaruwa, Sri Lanka

$8/hr
5.0
2 jobs

Hi, Im Pabasara, I automate things that were manual and run 24/7 without breaking; this is my promise. I build AI workflow automation systems, RAG-powered internal tools, and custom backend integrations for startups and businesses. My focus is on turning manual workflows, scattered knowledge, and repetitive internal processes into reliable AI systems that are actually usable in production. I work across backend architecture, retrieval pipelines, local and cloud LLM integrations, and automation workflows using tools like FastAPI, LangChain, vector databases, and API integrations. What I can help with RAG-based knowledge assistants for internal docs, SOPs, PDFs, and support content AI workflow automation for repetitive business processes and internal operations FastAPI backends for AI products, internal tools, and automation systems LLM integrations, local inference setups, and retrieval pipelines Custom admin tools, orchestration logic, and API-driven workflows Recent work Proactive Multi-Agent Assistant Built a Linux-native AI assistant using LangChain multi-agent orchestration and local llama.cpp inference. The system routes tasks between specialist agents, keeps persistent memory across sessions, and uses wearable data as context for proactive recommendations. Offline AI Knowledge Assistant for Rural Communities Built a fully offline AI knowledge system for schools and libraries with no internet access. The system uses local LLM inference, a LangChain RAG pipeline over educational content, and vector search to provide grounded answers without any cloud dependency. AutoMeet – AI-Powered Meeting Scheduling Built an AI scheduling workflow that coordinates meeting logic, automation, and integrations around calendar-based scheduling. I also have experience shipping production software outside the AI automation space, including a professional Android camera app published on the Google Play Store. That background helps when a project needs not just AI logic, but real product engineering, clean architecture, and user-facing reliability. If you’re building an internal AI tool, a RAG-based system, or an automation-heavy backend product, I’d be happy to discuss the best way to structure it.

  • Machine Learning
  • Claude 3.5 Sonnet
  • AI Agent Development
  • AI Development
  • AI App Development
  • Python
  • LangChain
  • Retrieval Augmented Generation
  • FastAPI
  • Vector Database
  • n8n

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