Aman Kumar Sinha
I build fast, scalable web applications that solve real business problems. From crafting polished user interfaces to building reliable APIs and backend systems, I turn ideas into production-ready products that are built to perform.
Projects Built
500+
Production & Personal
Client Satisfaction
1000%
Consistently delivering quality
Years Experience
2.5+
Professional Development
GitHub Commits
1.8K0+
in 2026
About Me
I’m a Software Engineer who enjoys solving problems, learning how systems work, and turning ideas into thoughtful solutions. I care about writing clean, maintainable code and making decisions that keep products reliable as they grow. For me, good engineering is not just about making something work, it’s about building it well and taking ownership of the result.
Aman Kumar Sinha
Frontend Engineering
Building fast, accessible, and easy-to-use interfaces with React and Next.js.
Backend Architecture
Building solid server-side systems, RESTful APIs, and database structures that scale.
System Integration
Connecting third-party services, cloud platforms, and deployment pipelines to work together smoothly.
Performance & SEO
Improving page speed, Core Web Vitals, and search rankings so more people can find and use your site.
Work Experience
My professional journey so far
- Dec 2025 – Present
Software Engineer
ReactTypeScriptNext.js 14AxiosPostHogContext API- Architected and built a drag-and-drop email template builder for BuyBoxCartel.com, a US-based real estate investment platform, with a custom rendering engine, content blocks, live preview, and JSON-to-HTML generation.
- Led the migration to a new v2 RESTful API, integrating 150+ endpoints using Axios while modernizing reusable React components written in TypeScript.
- Upgraded the application from Next.js 12 to 14.2, improving performance, maintainability, security, and Core Web Vitals.
- Delivered 60+ production features and fixes across Marketplace, Messaging, Pipeline, Dashboard, Authentication, Affiliate, and Admin modules.
- Integrated PostHog for analytics and feature flags, and implemented platform-wide Light Mode using React Context API.
- Nov 2024 – Dec 2025
Frontend Software Engineer
ReactNext.jsnext-intlRESTful APIsRazorpayPayPal- Built a scalable mock test platform for JEE and NEET aspirants with real exam simulations and detailed analytics.
- Designed responsive website and dashboards for Sarthaks eConnect, improving usability and student engagement.
- Integrated RESTful APIs along with Razorpay and PayPal payment gateways for secure online transactions.
- Developed and deployed multilingual browser-based games using React for cloudz.fun, implementing internationalization with next-intl and supporting 21 languages for global users across desktop and mobile.
- Improved application performance through lazy loading, code splitting, bundle optimization, and Lighthouse audits.
- Jan 2024 – Nov 2024
Full Stack Software Engineer
HTMLCSSBootstrapJavaScriptPHPMySQLphpMyAdminGitGitHubcPanel- Built and maintained 10+ dynamic websites and SaaS applications for clients across education, healthcare, and e-commerce.
- Developed responsive user interfaces using React.js, HTML, CSS, Bootstrap, and jQuery.
- Developed backend systems using PHP, managed databases with MySQL and phpMyAdmin.
- Implemented user authentication, admin panels, contact forms, and lead generation modules.
- Created custom CMS dashboards with user roles and role-based access control.
- Used Git, GitHub, and cPanel for version control, deployment, and automated database backups.
Technical Skills
Technologies and tools I work with
Education
My academic background
Master of Computer Applications (MCA): Computer Science
Bachelor of Computer Applications (BCA): Computer Science
Sahyogi High School, Hajipur
Intermediate
Sahyogi High School, Hajipur
Matriculation
Featured Projects
View All Projects
HealthyRaho.in
Hindi health & wellness blog with tips, guides and resources.
DeveloperJobs.in
Job portal for developers with modern UI and search functionality.
Open Source
I love contributing to open source. Check out my repositories and contributions on GitHub.
View on GitHubWhat People Say
Real recommendations from colleagues and managers
I worked closely with Aman in Walsis eConnect India Pvt Ltd. He consistently delivered high-quality work and took ownership of important features. He has strong skills in React.js, JavaScript, responsive UI development, API integration, and performance optimization. Aman is reliable, quick to learn, and always focused on delivering polished user experiences. I highly recommend him for Frontend Engineer roles.
Aman is an exceptional Frontend Software Developer with strong expertise in React.js, Next.js, TypeScript, and modern web technologies. At Techymonks, he architected a powerful drag-and-drop email template builder with AI from scratch with reusable components, live preview, and JSON-to-HTML rendering. Aman consistently took ownership of features, delivered production-ready solutions, and collaborated effectively across teams. I highly recommend him to any organization looking for a talented Frontend Engineer.
Aman Sinha is a highly skilled and dedicated developer. His strong technical expertise, problem-solving ability, and collaborative approach make him an invaluable team member. Aman is not only technically proficient but also approachable, supportive, and always willing to help others. It's a pleasure to work alongside him.
During his term of employment, his performance was found satisfactory. Aman supported development, maintained web portals and websites, assisted in deployment, and wrote clean code for web-based solutions. His technical expertise and understanding of website development platforms and coding languages helped our company fulfill all assignments successfully and on time.
I worked closely with Aman in Walsis eConnect India Pvt Ltd. He consistently delivered high-quality work and took ownership of important features. He has strong skills in React.js, JavaScript, responsive UI development, API integration, and performance optimization. Aman is reliable, quick to learn, and always focused on delivering polished user experiences. I highly recommend him for Frontend Engineer roles.
Aman is an exceptional Frontend Software Developer with strong expertise in React.js, Next.js, TypeScript, and modern web technologies. At Techymonks, he architected a powerful drag-and-drop email template builder with AI from scratch with reusable components, live preview, and JSON-to-HTML rendering. Aman consistently took ownership of features, delivered production-ready solutions, and collaborated effectively across teams. I highly recommend him to any organization looking for a talented Frontend Engineer.
Aman Sinha is a highly skilled and dedicated developer. His strong technical expertise, problem-solving ability, and collaborative approach make him an invaluable team member. Aman is not only technically proficient but also approachable, supportive, and always willing to help others. It's a pleasure to work alongside him.
During his term of employment, his performance was found satisfactory. Aman supported development, maintained web portals and websites, assisted in deployment, and wrote clean code for web-based solutions. His technical expertise and understanding of website development platforms and coding languages helped our company fulfill all assignments successfully and on time.
Let's Work Together
Have a project in mind? Reach out via the form or through my contact details.