Naveen Kumar Muthumari

My Wallet - Dapp
-Developed a secure Ethereum wallet Dapp for managing Ethereum transactions and wallet interactions.
-Implemented wallet creation, import, transaction assembly, nonce retrieval, gas estimation, and raw transaction signing.
-Enabled hashing and signing to prevent replay attacks, and facilitated Ether balance retrieval and transfer execution via Alchemy API.
-Utilized React for responsive UI and state management, and integrated modal dialogs for user interactions and -error handling.

Ethereum Insight: Real-time Blockchain Analytics Dashboard - Dapp
-Created a real-time analytics dashboard for monitoring Ethereum transaction volumes, gas fees, and network utilization.
-Featured ERC20 transaction volume tracking, BASEFEE per block visualization, and gasUsed to gasLimit ratio analysis.
-Employed Alchemy SDK and React for data fetching, processing, and real-time display, ensuring an interactive user interface.

Secure Airdrop NFT Minting with Commit-Reveal
-Developed a smart contract for secure and efficient NFT airdrops using Merkle Trees for eligibility verification.
-Implemented gas cost optimization techniques, a commit-reveal scheme for random NFT ID allocation, and multicall functionality for reduced transaction costs.
-Designed a state machine for managing the NFT minting process and secure withdrawals for contributors.

SecureSign NFT Marketplace - Lazy Minting
-Launched an NFT marketplace utilizing Ethereum smart contracts for secure creation and trading of digital assets.
-Implemented trusted signer verification for authenticating NFT transactions and enabled dynamic NFT minting with EIP712 cryptographic standards.
-Utilized OpenZeppelin's libraries for smart contract security and efficiency, and ensured ownership and access control via the Ownable contract.

Project: Digital Government Integrated e-Services (DigiGov), St. Lucia
Role: Full Stack Developer
Overview:
Played a pivotal role in the development of DigiGov, a comprehensive online platform offering a range of government services to the citizens of St. Lucia. This project streamlined various governmental processes, making them accessible via a single digital portal.

Key Contributions:
1.Driving License Test Scheduling:
Developed end-to-end functionality for scheduling practical and theory driving tests.
•Technologies: Java, Spring, Hibernate, JavaScript, jQuery, KnockoutJS, HTML, CSS, REST API, MS SQL.
•Innovations: Modular design allowing future service integration; created multi-portal interfaces including public, agent, and officer dashboards for application processing and management.

2.Birth and Death Certificate Application System:
Engineered the complete workflow for applying for birth and death certificates.
•Technologies: Java, Spring, Hibernate, JavaScript, jQuery, KnockoutJS, HTML, CSS, REST API, MS SQL.
•Achievements: Implemented multi-portal access, ensuring smooth application flow and officer-level dashboard for efficient application review and actions.

3.Enterprise Service Bus (ESB) Project:
Architectured an ESB system from scratch to facilitate asynchronous communication between DigiGov and external services.
•Technologies: Apache Karaf, Apache ActiveMQ, RESTful Web Services, REST API client, MS SQL.
•Impact: Enabled seamless external API integrations, improving data flow and providing a robust logging system for debugging and analysis.

4.COVID-19 Digital Vaccination Certificate:
Rapidly delivered a digital solution for issuing COVID-19 vaccination certificates.
•Technologies: Java, Spring, Hibernate, JavaScript, jQuery, KnockoutJS, HTML, CSS, REST API, MS SQL.
•Significance: Enabled timely access to digital vaccination certificates, crucial for public health management.

Project Experience at client - Linkgroup, Australia (Australian Insurance Products)
Role: Full Stack developer
Overview:
Contributed to the development of key applications for Australian insurance products at Linkgroup, a leading service provider in Australia's superannuation administration industry. My tenure at Mindtree involved close collaboration with diverse teams and clients, focusing on the development and enhancement of complex insurance and finance applications.

1. Aaspire^Gateway (Client: Aaspire Private Ltd)
- Developed an internal web-based application for call centers to assist members and employers.
- Tech Stack: Java, Spring, Hibernate, JSP, Servlets, SOAP Web Services, JavaScript, JQuery, CSS, HTML, Oracle, Apache Tomcat.
- Tools: Eclipse, SQL Developer, Soap UI, SVN, JIRA, Sonar, Maven.
- Contribution: Engineered features for unified access to Aaspire data, enhancing call center service delivery.

2. Aaspire^Central (Client: Aaspire Private Ltd)
- Worked on a core application managing superannuation funds and accounts, built on Swings.
- Tech Stack: Java, JDBC, SQL, SOAP Web Services, Aaspire Framework (Swing, Hibernate), Oracle, Red Hat JBOSS.
- Tools: Eclipse, SQL Developer, Soap UI, SVN, Jenkins, JIRA, Sonar, Maven.
- Impact: Focused on integrating multiple systems for efficient fund and account management.

Responsibilities:
- Collaborated with business and technical analysts, developers, and support teams to define project specifications.
- Played a key role in the development phase of both Aaspire Gateway and Aaspire Central projects.
- Ensured optimal client-side experience in coordination with the design team.
- Managed communications between offshore development teams and business analysts.
- Authored SQL statements for database management and business requirements.
- Delivered QA support, addressing defects across SIT, UAT, and production environments.

Internship Experience at Skava Systems Ltd. (now Infosys Equinox)
Role: Intern Developer
Duration: 6 months during the final year of B.Tech in IT
Overview:
Secured a highly competitive internship at Skava Systems Ltd., a leading provider of digital experience solutions for the retail industry, notably in mobile and omni-commerce solutions. Skava, acclaimed for its innovative Skava ONETM platform, was later acquired by Infosys.

Project: Kohls.com (Client: Kohl's Corporation)
- Kohl's is a prominent American omnichannel retailer, with a vast network of stores offering a wide range of products.
- Developed comprehensive digital solutions, including e-commerce websites and applications, enhancing Kohl's online retail presence.

Development Environment:
- Scripting Language: JavaScript
- Markup Language: HTML5
- Style Sheet Language: CSS3
- Plug-in: jQueryMobile
- Operating System: Windows 7
- Tools & Technologies: Ant-1.7.1, SDK, Apache Server, Tomcat, Handlebars, Backbone

Deploying Environment:
- Supported a wide range of mobile platforms, focusing on Apple iOS (3.2-5.0) and various Android versions, along with Windows Phone 7-7.5 and Blackberry.

Key Contributions:
- Developed the 'Baby and Wedding Registry' feature, allowing users to create, manage, and share product registries.
- Responsible for end-to-end feature development, including rigorous testing across multiple devices (Windows desktops, Android mobiles, iPads, iPhones).
- Addressed and resolved device-specific issues, ensuring a seamless user experience.
- Successfully deployed the feature to production, contributing significantly to the enhancement of Kohl's digital commerce capabilities.

My tenure at Skava Systems was marked by hands-on experience in developing user-centric digital solutions for a major retail client. This role honed my skills in cross-platform development, problem-solving, and delivering quality products in a dynamic, fast-paced industry setting.

Skills: jQuery · E-Commerce · HTML5 · Responsive Web Design · Web Development · Front-End Development · JavaScript · Handlebars.js · Cascading Style Sheets (CSS)