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Full Stack Developer and Web Developer specializing in JavaScript, React, Node.js, and scalable Web Application architecture. If you're building a SaaS platform, marketplace, or custom system, you don’t just need code — you need clean architecture, reliable backend logic, and a frontend that performs under real usage. As a React Developer, .NET Developer, and Backend Developer, I design and build high-performance systems using JavaScript, React.js, Next.js, Node.js, Python, Java, C#, and .NET technologies. I work across frontend, backend, and database layers to deliver complete Full-Stack Development solutions. Over the past 8+ years, I’ve delivered 60+ projects across SaaS, HealthTech, Fintech, enterprise systems, and marketplace platforms. 🧩 What I Do • SaaS Development: Build scalable SaaS platforms using JavaScript, React, Node.js, Next.js, and TypeScript designed for long-term growth. • Full-Stack Development: End-to-end Web Application development — frontend, backend, database, and deployment. • Backend Development: RESTful API design and API Integration using Node.js, Python, Java, C#, and .NET (ASP.NET) frameworks. • Front End Development: Responsive interfaces built with HTML5, CSS, JavaScript, React.js, Angular, and Vue.js. • Mobile App Development: React Native Developer building cross-platform iOS and Android apps connected to secure backend systems. • WordPress Development: Custom WordPress Developer solutions, CMS architecture, and performance optimization. • Cloud & Infrastructure: Amazon Web Services deployment, CI/CD pipelines, and scalable production environments. 🛠 Skills & Stack Frontend React, React.js, Next.js, JavaScript, TypeScript, HTML, HTML5, CSS, Responsive Design, Angular, Vue.js Backend Node.js, ExpressJS, Python, Java, C#, .NET, ASP.NET, PHP, Laravel, RESTful API, API Integration Databases MongoDB, PostgreSQL, MySQL, MariaDB Mobile React Native Developer, Mobile App Developer CMS & Platforms WordPress, WordPress Developer Cloud Amazon Web Services, CI/CD 📈 Results Across 60+ Full-Stack Development projects: • Scaled SaaS platforms to 50K+ active users • Delivered complex Web Applications in 4–8 weeks • Improved performance by 40–65% • Reduced infrastructure costs by 30% through backend optimization • Built dashboards processing 1M+ records • Launched cross-platform mobile apps with unified backend systems Clients typically accelerate development cycles by 2–4× while reducing long-term engineering rework. Whether you need a Full Stack Developer, Web Developer, Backend Developer, React Developer, .NET Developer, C# Developer, Angular Developer, Python Developer, Java Developer, WordPress Developer, Mobile App Developer, or React Native Developer, I help you build systems that scale — not just features that work temporarily.

Dasun Nirmitha is a freelance Technical Writer, SEO Writer, Content Writer, Blogger, Editor, and Proofreader specializing in technical writing on theoretical and practical spectrums. Using his wit and creativity, he's known for his ability to simplify complex technical concepts into engaging content for the readers. Although he's a non-native speaker of English, he holds a proven equal fluency in the language for both its US/UK variants. And, at the moment of writing, Dasun works as a remote Technical Writer for multiple well-known tech platforms, such as Agora, Baeldung, Lokalise, VPNCheck. With a perfectionist vibe since childhood resulting in a 𝘭𝘪𝘵𝘦𝘳𝘢𝘭 𝘩𝘢𝘵𝘦 to see grammar or spelling mistakes (Grammar Pedantry Syndrome) on even a tweet on X(Twitter), he would love to author error-free and non-plagiarized tech articles for you, and likewise spot and correct mistakes on any of your stories, essays, articles, letters, etc. You can count on Dasun for original, non-plagiarized, and outright complete document work in US/UK English with impeccable grammar and spelling. Dasun's main objective is to apply his best effort for work and hand over an admirable result to you. Certificates: EFSET EXPRESS High Proficiency (CEFR C1/C2) *Please Check the 'Licenses & Certifications' section on his LinkedIn Profile under the same name. Dasun is also a BEng. (Hons) Software Engineering graduate and a past Software Engineer with 5+ years of industry experience working with Java SE/EE, Spring Boot/MVC, C#, Python, Flutter, Web Development, Microservice-based Development, REST API, Linux environment, SQL, MySQL, JUnit, Mockito, GIT, SVN and basic knowledge on Javascript, Bootstrap, JQuery, MongoDB, AngularJS, HTML5, CSS3. Further experience performing Research and Development on numerous project-related tools. He has advanced his career starting from a Trainee Associate level, achieving his way up into the Senior level providing his service for global companies serving millions of customers worldwide, namely Dialog Axiata Inc., Zone24x7 Inc. and also in Startup local firms with around 50-200 employees namely Aeturnum, Just In Time Technologies, and Zincat. His team managed to win an Honourable mention (Global top 10) for the project TravelMe at Microsoft Imagine Cup 2016 Big Idea: Plan Challenge. He helped in all stages of the project including requirements gathering through distributing survey forms on social media, development of the project coded in Java, and coming up with the project name. His involvement in composing, proofreading and editing the Plan document highly affected winning the said Honourable mention. Other experience and examples of work -Software Engineer at Aeturnum Pvt. Ltd. Full-stack development on the microservice-based project with Spring Boot Java Backend and AngularJS Frontend. Quickly learned different services in the project and how they interacted with each other. Advised and guided Junior Developers when they were blocked on their implementations. -Senior Software Engineer at Dialog Axiata; Outsourced by Just In Time Technologies Pvt. Ltd. Backend development on Spring Boot/MVC-based Java projects. Worked under minimal supervision while coding and provided Front-end design ideas while brainstorming. -Software Engineer at ZinCat Technologies. Frontend development on Google Flutter Framework-based project. Quick learning of the new framework as per the project requirements and taking individual responsibility in the development of the project. -Outsourced Software Engineer at Dialog Axiata; Outsourced from ZinCat Technologies. Development support on Apache Kafka platform-based Java project. Collaborated with team members to share knowledge of the Kafka platform and worked with them to help the project achieve better stability. -Trainee Associate Software Engineer at Zone24x7 Inc. Development and testing support on a RESTful Play Framework-based Java project. Successfully worked under strict timelines given by the foreign company the project was working for. Work was equally divided between team members, but when he had completed his work he always requested and took over the work of other team members. Dev support on Selenium Framework based Java project. Worked together with team members to face new requirement changes accordingly, delivering the development work in due time.

I specialized in planning, designing, and building web applications. If you need a web system or website developed for yourself or your organization, I can do that for you too. I will listen to your requirements carefully, suggest a good solution, and proceed to make it a reality for you. I will not bore you with technical jargon, but I will make use of the latest and most remarkable technologies available to build your proposed system or website. I will jump into your shoes and look at your requirements from your point of view. It is very important for me to see my client's businesses succeed and their goals being fulfilled. The reason is that that is the only way my clients will return to me and refer their friends and family to me. I am friendly with my customers and I expect to work with friendly customers. I am honest about what I can and can't do and would not hesitate to tell you which. I consider each and every project I take on as my own, and work to see a successful completion. It has allowed me to maintain a high success rate in other skill marketplaces, and I strive to do the same in Upwork. SKILLS: - Microservices - API Integrations - API Development - API Management - Web Application Development - Database Management - Web Design and Development - Ecommerce Development - Linux Server management Programming, Database, and Markup : - OOP Languages (PHP) - Laravel PHP Framework - Angular JavaScript Framework - MySql, Postgresql - JavaScript/ Jquery - Bootstrap Responsive Framework - HTML5/CSS3/ Tailwind CSS, Vue js Cloud Vendors : - Digital Ocean - Amazon Web Services - Bluehost - Hostgator Content Management Systems: - WordPress - Prestashop - WooCommerce Version Control with GIT, Github, and Gitlab

I am a multi-skilled Software Engineer and IT Specialist with strong experience across software development, technical support, UI/UX design, data processing, AI content creation, and accounting/business operations, enabling me to deliver complete, end-to-end solutions for clients worldwide. Front-End Developer, Back-End Developer, Full-Stack Developer 💻 Software Engineering & Application Development I build reliable and efficient applications using modern technologies, with a focus on clean architecture, performance, and usability. Technologies & Frameworks: HTML, CSS, JavaScript, JavaEE, Spring Boot, Java, JavaFX, MVC, Hibernate, JDBC, Node.js, TypeScript, MongoDB, Firebase, REST APIs, MySQL, SQL, BootStrap, Tailwind CSS Projects Include: Android License Reminder App (Firebase, SMS/Email alerts, secure data handling, Sri Lanka–specific validation) Bookshop Management System (Inventory, billing, customer records) Personal Portfolio Website built from scratch using core web technologies 🖥️ IT Support & System Troubleshooting I provide professional remote IT support for Windows, Linux, and macOS, helping clients resolve issues quickly and securely. ✔ OS Troubleshooting & Optimization ✔ Software Installation & Configuration ✔ Virus & Malware Removal ✔ Performance Tuning ✔ Remote Support (AnyDesk, TeamViewer, RDP) ✔ Virtual Machines & Security Tools 🎨 UI/UX & Product Design I design and improve modern web & mobile interfaces that are clean, intuitive, and conversion-focused. ✔ UI/UX Design & Redesign ✔ Figma & Adobe Photoshop ✔ Wireframing & Usability Testing ✔ Layout Refactoring & Visual Consistency ✔ Mobile & Web App Interface Improvements 📱 Mobile App Testing (Android & iOS) I ensure mobile apps are ready for release through thorough manual testing. ✔ Functional & Usability Testing ✔ Bug Reporting with Screenshots ✔ UI & Navigation Testing ✔ Cross-device & Version Testing ✔ Performance & Responsiveness Checks 🤖 AI Content Creation & Automation I create high-quality AI-powered content using ChatGPT, Gemini, Copilot, helping clients grow digitally and automate workflows. ✔ AI Image, Video, Audio & Text Content ✔ Marketing & Social Media Content ✔ Business Automation ✔ Scalable Content Solutions 📊 Excel & Data Specialist I transform raw data into clean, useful insights. ✔ Data Cleaning & Formatting ✔ Dashboards & Reports ✔ Excel Formulas & Pivot Tables ✔ Power Query & VBA Macros ✔ Google Sheets Automation 📑 Accounting, Business & Admin Support With hands-on experience in retail, wholesale, and business management, I also support financial and operational tasks. ✔ Accounting Assistance & Bookkeeping ✔ Financial Reporting & Reconciliations ✔ Inventory & Transaction Processing ✔ Data Entry & Documentation ✔ Business Operations Support 🌍 Translation & Transcription Professional multilingual services with cultural accuracy: ✔ English ⇄ Tamil, Sinhala, Arabic ✔ Business & Legal Translation ✔ Subtitles & Transcription ✔ Proofreading & Localization Translate (translator) and Transcript (transcriptor) 🌟 Why Clients Choose Me ✔ Multi-skilled & cost-effective ✔ Detail-oriented & reliable ✔ Clear communication ✔ On-time delivery ✔ Confidential & professional ✔ Long-term collaboration focused Whether you need software development, IT support, UI/UX design, mobile testing, AI content, data solutions, or business support, I bring accuracy, efficiency, and professionalism to every project. 📩 Let’s work together and build solutions that truly make an impact.

As a web developer with over 4 years experience and as a undergraduate of business management accounting and finance, under my belt i am the perfect contractor for your project. I specialize in Graphic/Web design and development, accounting, writing and data entry for small to large size of businesses. whatever their purpose i have the skills to develop the online presence your business needs. My skills include: HTML, CSS3, PHP, jQuery, Photoshop, Illustrator, SEO, Social media marketing (instagram), Full project management, Content/creative/copy writing, Accounting and Financial Statistics, Data entry and Contract law. All work is completed by me and i assured knowing that your work will not be outsourced to someone else. I ensure the project is completed to the specific guidelines required, crystal clear communication, finished in a time framed beautiful design work, friendly and easy to work with. I pride my self on providing the highest quality of work and adding significant value to every project i get invited to. I assure that i can deliver those results accurately and also i am flexible with my working hours, increasing your profits by creating a goodwill to you and with zero worries. I look forward to hearing from you.

⭐️ Expert Vetted - Top 1% of talent on Upwork 🕒 20+ hours on Upwork ✅ 5+ years of experience ✅ 10+ projects delivered ✅ Excelling in delivering Fortune 500-scale projects As a seasoned Full Stack developer with over 5 years of experience, I've collaborated with Fortune 10 companies, specializing in LAMP and MERN stacks. My expertise spans standalone and API-driven web applications, token-based RestFul API servers, and microservices architectures. With more than 10 reviews. Whether it's cutting-edge technologies or tailored project needs, I have the skills and knowledge to deliver. From revamping the Aesthetics platform of the Goals to e-commerce stores having over 1M customers. Improving the conversion rate and user experience of Jot. Custom theme designs to e-commerce stores and custom apps/plugin development, I will help you transform your personal or business concept into a success story. In the last 5 years, I have worked with many Fortune 10 companies and big brands such as Bumble App, Jot, &Sons, Macy's, Blender to startups like Litecure and Furbaby Tracker. I have completed more than 100 projects for companies from over 8 countries. I have a 100% track record of delivering projects on time. Not an inch past the deadline, that's my personal credo. Whether you seek expertise in a specific technology, tool, framework, or library, or need a dedicated and skilled development partner to bring your project to life, I'm the one for the job. Let's connect to discuss how I can help you achieve your goals!