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Full Stack Developer · Senior Svelte Developer · Top Rated Plus on Upwork · 7+ Years
About
Ibuildfast,scalable,andAI-enhancedwebapplications—andI'vebeendoingitfor7+years.AsaTopRatedPlusfreelanceronUpworkwitha100%JobSuccessScoreand50+completedprojects,I'vehelpedstartupsandproductteamsshippolished,high-performancewebappsacrossfintech,SaaS,cloudplatforms,andmore.Mycorestack:React·Svelte/SvelteKit·TypeScript·Node.js·Tailwind·PostgreSQL.Opentofull-timeremoterolesandhigh-impactfreelanceprojects.
Work experience
Upwork
Full Stack Developer · Top Rated Plus
Remote (Worldwide)
- Top Rated Plus badge (2026) with 100% Job Success Score across 50+ completed projects.
- Achieved JavaScript skill certification, ranking in the top 10% of Upwork developers.
- Delivered 40+ projects with a perfect 5.00 client rating and 1,500+ total hours billed.
- Specializing in SvelteKit, React, TypeScript, and Node.js for international clients.
TeamHosty
Frontend Engineer
Lithuania (Remote)
- Built a full-featured cloud management portal for managing Kubernetes clusters, firewalls, VPCs, and server infrastructure.
- Developed 20+ reusable UI components for a customized admin panel serving internal clients.
Shopping Cart Elite (HireOnceAndForever)
Frontend Engineer
New York (Remote)
- Developed 30+ UI components for a crypto banking system, improving user engagement by 30%.
- Led the conversion of a legacy .NET web application to Svelte and SvelteKit, reducing load times by 40%.
- Optimized 15 critical components, resulting in a 25% increase in overall application performance.
xBase (Ultrablue inc)
Frontend Engineer
Seoul, South Korea (Remote)
- Redesigned the full application UI, increasing user satisfaction ratings by 30%.
- Refactored 4,000+ lines of code, improving maintainability and reducing bug reports by 40%.
- Implemented drag & drop functionality and an interactive onboarding process, increasing user retention by 25%.
Kws3 Media Ltd. UK
Full Stack Developer
London (Remote)
- Developed 4+ admin dashboards with advanced reporting and charting, reducing data analysis time by 50%.
- Developed and integrated REST APIs with frontend applications for multiple client projects.
- Contributed to an internal component library, increasing team productivity by 25%.
Freelance Work & Client Projects
8+ years of freelancing on Upwork, delivering high-quality web applications for clients worldwide.
Top Rated Plus
100% Job Success
50+ Projects
1,500+ Hours
SaaS / Cloud Platform
Cloud Infrastructure Dashboard
Built a full-featured cloud management portal enabling users to manage Kubernetes clusters, firewalls, VPCs, and server infrastructure. Delivered a responsive, real-time dashboard with complex state management and secure API integration.
Delivered 20+ reusable UI components on schedule
SvelteKit
TypeScript
Tailwind
REST API
Fintech / Web App
Crypto Banking System
Developed 30+ UI components for a crypto banking platform, focusing on data-heavy dashboards, transaction flows, and user account management with a clean, accessible interface.
Improved user engagement by 30%
Svelte
SvelteKit
TypeScript
Tailwind
Web App Migration
.NET to SvelteKit Migration
Led the full conversion of a legacy .NET web application to a modern SvelteKit architecture. Rebuilt UI layer from scratch, optimized critical rendering paths, and integrated REST APIs with a clean component structure.
Reduced load times by 40%
SvelteKit
TypeScript
Tailwind
REST API
E-Commerce / GamingView Live
CS2 Skins Marketplace
Developed the frontend for a CS2 (Counter-Strike 2) skins trading marketplace. Implemented real-time price updates, item filtering, user listings, and a smooth checkout experience.
Live at csmiddler.com
SvelteKit
TypeScript
Tailwind
Job Board / Web AppView Live
Jobs Portal — Northern Ireland
Built a fully functional regional jobs portal with listings, search, filters, and employer dashboards. Integrated AWS Amplify for authentication and data management.
Live regional platform serving active job seekers
Svelte
JavaScript
AWS Amplify
Productivity / Chrome ExtensionView Live
AI-Powered Tweet Library (Tweetbase)
Redesigned the full application UI for Tweetbase, an AI-powered tweet saving and search Chrome extension. Implemented drag & drop, onboarding flows, and leveraged IndexedDB via Dexie.js for offline-first storage.
25% increase in user retention after redesign
Svelte
SvelteKit
Tailwind
TypeScript
Dexie.js
IndexedDB
I am proficient with
Svelte
SvelteKit
React
Next.js
TypeScript
JavaScript
Node.js
Tailwind CSS
PostgreSQL
Supabase
Docker
REST API
Playwright
Git
Check out projects that I have worked on
I've worked on a variety of projects, from simple websites to complex web applications. Here are a few of my favorites.
I would like to recommend a professional front-end developer with whom we have collaborated on several projects. One of the key qualities of Kawsar is his excellent communication skills and ability to work effectively in a team. Not only does he excel in fulfilling his responsibilities, but he also actively engages with other team members, fostering an atmosphere of mutual understanding and collaboration. Kawsar swiftly addresses any issues that arise, and quickly learns and integrates new technologies when involved in new projects. He has demonstrated outstanding results in his work and is not hesitant to contribute his ideas for the successful implementation of various tasks.
Kawsar can do many stuff well but he is particularly good with Svelte. He shipped an entire redesign of tweetbase app so quick that we called him Svelte ninja. If your project is written in Svelte, you will not regret hiring Kawsar.
Kawsar is a highly skilled software engineer with extensive experience in web development using svelte and react. He has a track record of delivering high-quality work and is known for his strong debugging skills and ability to work well in a team. Kawsar is a reliable and responsible professional who would be an asset to any software engineering team. I highly recommend him for any software engineering role.
I highly recommend Kawsar Ahmed for any development project. I had the pleasure of working with Kawsar at Kws3.media for over three years (2018-2021), where we collaborated on a number of bespoke applications for companies such as Social Energy, Zanussi Boilers, and Switch Energy network. Kawsar is an incredibly talented and knowledgeable developer. He has a deep understanding of modern web development technologies such as Svelte, Bulma, PHP, React, and Bootstrap, and is able to use these tools to build high-quality, scalable applications. He also has experience with API integration, CLI tasks, and database design, and is familiar with frameworks such as Laravel. Kawsar is able to quickly and efficiently solve complex problems and is always willing to learn and adapt to new technologies.
As a Full Stack Developer, Kawsar has demonstrated exceptional skills in driving multiple high-profile projects to success. His expertise in developing comprehensive solutions and adapting to diverse business needs is remarkable. With a commitment to leveraging the latest technologies and continuous learning, he has consistently delivered outstanding results.
I would like to recommend a professional front-end developer with whom we have collaborated on several projects. One of the key qualities of Kawsar is his excellent communication skills and ability to work effectively in a team. Not only does he excel in fulfilling his responsibilities, but he also actively engages with other team members, fostering an atmosphere of mutual understanding and collaboration. Kawsar swiftly addresses any issues that arise, and quickly learns and integrates new technologies when involved in new projects. He has demonstrated outstanding results in his work and is not hesitant to contribute his ideas for the successful implementation of various tasks.
Kawsar can do many stuff well but he is particularly good with Svelte. He shipped an entire redesign of tweetbase app so quick that we called him Svelte ninja. If your project is written in Svelte, you will not regret hiring Kawsar.
Kawsar is a highly skilled software engineer with extensive experience in web development using svelte and react. He has a track record of delivering high-quality work and is known for his strong debugging skills and ability to work well in a team. Kawsar is a reliable and responsible professional who would be an asset to any software engineering team. I highly recommend him for any software engineering role.
I highly recommend Kawsar Ahmed for any development project. I had the pleasure of working with Kawsar at Kws3.media for over three years (2018-2021), where we collaborated on a number of bespoke applications for companies such as Social Energy, Zanussi Boilers, and Switch Energy network. Kawsar is an incredibly talented and knowledgeable developer. He has a deep understanding of modern web development technologies such as Svelte, Bulma, PHP, React, and Bootstrap, and is able to use these tools to build high-quality, scalable applications. He also has experience with API integration, CLI tasks, and database design, and is familiar with frameworks such as Laravel. Kawsar is able to quickly and efficiently solve complex problems and is always willing to learn and adapt to new technologies.
As a Full Stack Developer, Kawsar has demonstrated exceptional skills in driving multiple high-profile projects to success. His expertise in developing comprehensive solutions and adapting to diverse business needs is remarkable. With a commitment to leveraging the latest technologies and continuous learning, he has consistently delivered outstanding results.
I would like to recommend a professional front-end developer with whom we have collaborated on several projects. One of the key qualities of Kawsar is his excellent communication skills and ability to work effectively in a team. Not only does he excel in fulfilling his responsibilities, but he also actively engages with other team members, fostering an atmosphere of mutual understanding and collaboration. Kawsar swiftly addresses any issues that arise, and quickly learns and integrates new technologies when involved in new projects. He has demonstrated outstanding results in his work and is not hesitant to contribute his ideas for the successful implementation of various tasks.
Kawsar can do many stuff well but he is particularly good with Svelte. He shipped an entire redesign of tweetbase app so quick that we called him Svelte ninja. If your project is written in Svelte, you will not regret hiring Kawsar.
Kawsar is a highly skilled software engineer with extensive experience in web development using svelte and react. He has a track record of delivering high-quality work and is known for his strong debugging skills and ability to work well in a team. Kawsar is a reliable and responsible professional who would be an asset to any software engineering team. I highly recommend him for any software engineering role.
I highly recommend Kawsar Ahmed for any development project. I had the pleasure of working with Kawsar at Kws3.media for over three years (2018-2021), where we collaborated on a number of bespoke applications for companies such as Social Energy, Zanussi Boilers, and Switch Energy network. Kawsar is an incredibly talented and knowledgeable developer. He has a deep understanding of modern web development technologies such as Svelte, Bulma, PHP, React, and Bootstrap, and is able to use these tools to build high-quality, scalable applications. He also has experience with API integration, CLI tasks, and database design, and is familiar with frameworks such as Laravel. Kawsar is able to quickly and efficiently solve complex problems and is always willing to learn and adapt to new technologies.
As a Full Stack Developer, Kawsar has demonstrated exceptional skills in driving multiple high-profile projects to success. His expertise in developing comprehensive solutions and adapting to diverse business needs is remarkable. With a commitment to leveraging the latest technologies and continuous learning, he has consistently delivered outstanding results.
I would like to recommend a professional front-end developer with whom we have collaborated on several projects. One of the key qualities of Kawsar is his excellent communication skills and ability to work effectively in a team. Not only does he excel in fulfilling his responsibilities, but he also actively engages with other team members, fostering an atmosphere of mutual understanding and collaboration. Kawsar swiftly addresses any issues that arise, and quickly learns and integrates new technologies when involved in new projects. He has demonstrated outstanding results in his work and is not hesitant to contribute his ideas for the successful implementation of various tasks.
Kawsar can do many stuff well but he is particularly good with Svelte. He shipped an entire redesign of tweetbase app so quick that we called him Svelte ninja. If your project is written in Svelte, you will not regret hiring Kawsar.
Kawsar is a highly skilled software engineer with extensive experience in web development using svelte and react. He has a track record of delivering high-quality work and is known for his strong debugging skills and ability to work well in a team. Kawsar is a reliable and responsible professional who would be an asset to any software engineering team. I highly recommend him for any software engineering role.
I highly recommend Kawsar Ahmed for any development project. I had the pleasure of working with Kawsar at Kws3.media for over three years (2018-2021), where we collaborated on a number of bespoke applications for companies such as Social Energy, Zanussi Boilers, and Switch Energy network. Kawsar is an incredibly talented and knowledgeable developer. He has a deep understanding of modern web development technologies such as Svelte, Bulma, PHP, React, and Bootstrap, and is able to use these tools to build high-quality, scalable applications. He also has experience with API integration, CLI tasks, and database design, and is familiar with frameworks such as Laravel. Kawsar is able to quickly and efficiently solve complex problems and is always willing to learn and adapt to new technologies.
As a Full Stack Developer, Kawsar has demonstrated exceptional skills in driving multiple high-profile projects to success. His expertise in developing comprehensive solutions and adapting to diverse business needs is remarkable. With a commitment to leveraging the latest technologies and continuous learning, he has consistently delivered outstanding results.
Get in Touch
Want to chat? Just shoot me a dm with a direct question on LinkedIn and I'll respond whenever I can. I will ignore all soliciting.