Kuldeep Singh

 Contact M: - Sydney/Melbourne LinkedIn | GitHub kuldeep.rajput.expert@ gmail.com Skills Programming: JavaScript (ES6+), Redux, TypeScript, Node.js, React.js React Query, Next.js Web Technologies: HTML5, CSS3/SCSS, Tailwind CSS, Bootstrap, Material UI, GraphQL, RESTful APIs Databases: PostgreSQL, GraphQL Testing: Jest, RTL, TDD, Unit Testing Cloud & DevOps: AWS, Terraform, CI/CD   Education Bachelor of Technology (Computer Science) Kurukshetra University - 2015 Master of Information and Communication Technology (Computer Science) USC – Australia 2020 . Kuldeep Singh Professional Summary Experienced React Full Stack Developer with over 5 years of hands-on experience architecting and delivering modern web applications using React, TypeScript, Node.js, Next.js and AWS. Proven success in developing secure, scalable, and high-performance systems for major clients such as BatteryMate, Accenture, and Samsung. Highly skilled in building responsive frontends, RESTful and GraphQL APIs, and deploying cloud-native backends using AWS Lambda, and CI/CD pipelines. Recognized for clean code, performance optimization, UI/UX precision, and full product lifecycle ownership. AWS certified, with deep experience in team collaboration, agile delivery, and modern DevOps workflows. Experience React Full Stack Developer BatteryMate | Sydney | Jun 2023 – Feb 2025 Reduced page load times by 30% using Next.js dynamic imports and lazy loading, improving Core Web Vitals. Enhanced API response time by 50% with Next.js API routes and AWS Lambda, enabling a scalable and serverless backend infrastructure. Delivered PWA functionality, improving mobile and desktop user experience and conversion rates. Implemented OAuth 2.0 & JWT authentication, optimizing secure sign-in flows for scalable applications, Designed pixel-perfect UI components in collaboration with design teams via Figma. Improved PostgreSQL performance by 40% through schema design and query optimization. Application Developer – SCATS Accenture | Australia | Feb 2022 – Mar 2023 Developed Node.js microservices for traffic monitoring, reducing latency by 25%. Integrated IoT sensors and AWS Lambda for real-time traffic data streaming. Built dynamic, data-driven UIs with React + Redux for live traffic monitoring and visualization. Optimized PostgreSQL queries, improving analytics speed by 30%. Collaborated with cross-functional teams, increasing system reliability by 20%. Application Developer – Samsung Accenture – Melbourne | Jun 2021 – Jan 2022 Developed responsive eCommerce UIs using React & Redux, increasing user engagement by 25%. Delivered pixel-perfect implementations based on Figma design. Reduced load times by 20% through performance tuning and state management optimization. Integrated GraphQL for efficient data fetching, improving frontend speed by 18%. React Developer Reesby – Australia | Jan 2021 – Jun 2021 Built a role-based job portal with RESTful APIs, enhancing real-time search functionality. Improved Lighthouse scores by 35% via rendering optimization and UX enhancement. Implemented WCAG 2.1 accessibility standards to ensure inclusive design. Ensured consistent UI/UX design in collaboration with Figma teams. Web Developer OSPMC – Australia | Aug 2017 – Dec 2018 Developed medical UI systems using React, TypeScript & SCSS. Improved page load times by 50% with performance enhancements. Led UI redesigns, improving user satisfaction and clinical workflows. Frontend Developer ARC Education | Mar 2016 – Jul 2017 Developed in-depth frontend development training with a focus on HTML5 semantic structure, CSS3 layout techniques, and core JavaScript concepts. Instructed students on industry best practices including clean code principles, performance optimization, and web accessibility in alignment with WCAG standards. Implemented Git version control training, covering workflows such as branching strategies, pull request reviews, and conflict resolution techniques. Conducted cross-browser and responsive testing, ensuring consistent UI behavior across multiple devices and platforms. Certification AWS Certified Developer Associate (DVA-CO2) 2025 HashiCorp Certified: Terraform Associate 2025 AWS Certified Solution Architect Associate 2025 AWS Certified AI Practitioner AIF-CO1 Portfolio & Projects PORTFOLIO Live Pizza Shop References Available upon request. .