6 Web3Js Jobs

You will be joining KeyValue, a trusted product engineering partner for Start Ups & Scale Ups, where you will unlock passion, develop ideas, and create abundant value for all stakeholders in the ecosystem. KeyValue's mission is to become the world's most trusted product development hub, delivering high-value outcomes for start-ups & scale-ups with a talented skilled team in a thriving and inclusive culture. The inclusive culture at KeyValue is engaging & experiential, providing an environment to learn & collaborate with freedom to think, create, explore, grow, and thrive. An ownership mindset with growth orientation is the foundation of exceptional client success. As a Blockchain Engineer with 3+ years of experience, you will design, develop, and maintain blockchain-based applications and smart contracts. Your responsibilities will include implementing security protocols, cryptography, and consensus algorithms, collaborating with cross-functional teams, optimizing blockchain-based systems for performance, scalability, and reliability, conducting research on existing blockchain frameworks, and staying updated on the latest blockchain trends and technologies. To be a great fit for this role, you should have a Bachelors degree in Computer Science, Information Technology, or a related field, along with 3+ years of experience in blockchain development. Proficiency in programming languages such as Solidity, Rust, JavaScript, or Python is required, as well as experience with Web3.js, Express.js, Truffle, or other blockchain development tools. A strong understanding of smart contracts, consensus algorithms, and decentralised applications, along with knowledge of cryptography, security protocols, and data structures, is essential. Excellent problem-solving skills and a proactive approach to challenges are key traits for success in this role. Strong written and verbal communication skills are necessary for team collaboration and technical documentation. Familiarity with machine learning and AI concepts, and a willingness to integrate these technologies with blockchain solutions is a plus. Knowledge of cloud platforms like AWS, Azure, or GCP for deploying blockchain solutions, as well as experience in developing or integrating NFTs, DeFi, or other blockchain-based use cases, will be beneficial. At KeyValue, you will be part of a dynamic team working on innovative projects that leverage cutting-edge blockchain technology. The environment encourages creativity, growth, and collaboration, helping you to stay at the forefront of tech advancements.,

As a Solidity Developer at our company, you will be a valuable addition to our blockchain engineering team. Your primary responsibility will be to design, develop, test, and deploy secure and scalable smart contracts using Solidity on Ethereum-compatible blockchains. You will play a crucial role in building smart contracts for various applications such as DeFi, NFTs, and Web3 platforms. Your tasks will include optimizing contracts for performance, gas efficiency, and security. You will collaborate closely with the frontend and backend teams to integrate smart contracts into decentralized applications (dApps). Additionally, you will be responsible for conducting code reviews, audits, and unit testing to ensure the reliability of the developed smart contracts. Staying updated on the latest Web3 trends, tools, and vulnerabilities will be essential in this role. To be successful in this position, you should have at least 2 years of experience in Solidity development. A deep understanding of Ethereum, EVM, smart contract architecture, and token standards such as ERC-20, ERC-721, and ERC-1155 is required. Familiarity with tools like Hardhat, Truffle, Remix, and Ganache will also be beneficial. Experience with web3.js/ethers.js and integrating smart contracts with frontend/backend systems is necessary, along with knowledge of security best practices like reentrancy, overflow, and front-running. Proficiency in Git and Agile workflows is expected. It would be a plus if you have experience with Layer 2s, sidechains, or cross-chain platforms. Familiarity with Rust, Solidity Assembly, or other blockchain protocols, as well as prior contributions to open-source Web3 projects, are also advantageous. We are looking for someone who is passionate about blockchain and decentralized technologies, possesses strong problem-solving and analytical skills, and can communicate effectively and collaborate well within a team. In return, we offer a competitive salary, token incentives, a flexible work environment, and the opportunity to work on cutting-edge Web3 products.,

As a Cryptocurrency Expert & Developer, you will play a crucial role in leading the design, development, and deployment of a new custom cryptocurrency/token system in Delhi. Your primary responsibility will be to create a secure token that will be utilized within our ecosystem, ensuring seamless wallet integration and transfer capabilities. Your expertise in smart contract development, blockchain deployment, and crypto wallet integrations will be essential for this role. You will be tasked with designing and developing a custom token such as ERC-20, BEP-20, or similar, writing and deploying secure smart contracts, and providing APIs/interfaces for token distribution and wallet interaction. Additionally, you will need to enable wallet transfers to personal crypto wallets like MetaMask and Trust Wallet, implement token-related business logic based on specific distribution criteria, and ensure the efficiency, scalability, and security of contracts. Backend integration with existing systems and creating admin tools for token management and distribution will also be part of your responsibilities. To excel in this role, you should possess strong experience with Solidity, Web3.js, Ethers.js, or similar frameworks. A proven track record of launching secure tokens on Ethereum, BSC, or other networks, along with experience in wallet integration and Web3 applications, will be beneficial. Understanding smart contract testing and auditing best practices, familiarity with backend development (preferably Node.js or Python), and the ability to work independently to deliver end-to-end crypto solutions are key attributes we are looking for. In return, we offer you the opportunity to work on innovative and impactful projects, contributing to technology that has a real-world impact on communities globally. You will receive a competitive salary and a comprehensive benefits package, including stock options, in a collaborative, supportive, and growth-oriented work environment. Flexible work arrangements, access to the latest tools and technologies, and a focus on collaboration and growth will be part of your experience here.,

The ideal candidate for the role of Blockchain Developer at our Stealth Prop-tech startup will be responsible for developing and maintaining backend services and APIs to connect our Property Search platform with blockchain networks. You will play a crucial role in integrating real estate tokenization platforms and managing the flow of data related to property tokens and ownership. Your tasks will include building API endpoints for frontend applications to interact with blockchain functionalities, ensuring data consistency between on-chain state and off-chain databases, implementing event listeners for smart contract monitoring, and collaborating with the security team to ensure the security of integration points. Troubleshooting and resolving issues related to blockchain connectivity and third-party API integrations will also be part of your responsibilities. To qualify for this role, you should have 3-5+ years of experience in backend software development, with a minimum of 2+ years focused on integrating systems with blockchain technology. A Bachelor's degree in Computer Science, Engineering, or a related technical field is required. Proficiency in a modern backend language such as Node.js, Python, or Go is essential, along with hands-on experience in interacting with blockchain networks using libraries like Ethers.js, Web3.js, or similar. A solid understanding of blockchain fundamentals, smart contracts, and wallet interactions, as well as experience with relational databases (e.g., PostgreSQL) and API design, are also necessary. Preferred qualifications for this role include experience in the PropTech or FinTech sectors, familiarity with the regulatory landscape in the UAE (particularly the VARA framework for virtual assets), experience working in a cloud environment (AWS, Google Cloud, or Azure), knowledge of message queues (e.g., RabbitMQ, Kafka) for handling blockchain events, and experience with secure key management and custody solutions.,

We are seeking a skilled Blockchain Developer with practical experience in Solana (Rust + Anchor) and EVM-compatible chains such as Ethereum, Polygon, Base, BSC. The ideal candidate will possess expertise in smart contract development, cross-chain interoperability, and full-stack dApp development with React and Web3 integrations. Your responsibilities will include developing secure, scalable, and user-centric decentralized applications with seamless wallet and blockchain integrations. As an Immediate Joiner, you will be tasked with developing and deploying smart contracts on Solana (Rust + Anchor) and EVM-based networks using Solidity. Additionally, you will build full-stack dApps utilizing React.js/Next.js, Web3.js/Ethers.js, and integrating wallets like MetaMask, Phantom, and WalletConnect. Implementing cross-chain features using LayerZero, Wormhole, or Axelar for bridging, syncing, and wrapped tokens will also be part of your role. You will be responsible for writing secure, gas-optimized contracts, conducting comprehensive testing using tools like Mocha, Jest, Anchor test suite, Hardhat, and Foundry. Integration of backend services with Node.js, GraphQL/REST APIs, PostgreSQL/MongoDB, and Redis (optional) will also be within your scope. Automation of deployments using Docker and CI tools such as GitHub Actions and GitLab CI is expected. Monitoring and troubleshooting on-chain activity using tools like Tenderly, Etherscan APIs, and Solana Explorer will also be part of your responsibilities. Collaboration with frontend and DevOps teams to ensure excellent UI/UX and scalability is crucial. The desired candidate should possess 3+ years of full-stack development experience, at least 1 year of hands-on Solana smart contract development (Rust + Anchor), proficiency in Solidity and EVM tools (Hardhat, Foundry, Truffle), strong knowledge of Web3 wallet integration, blockchain architecture, and RPC interactions. Experience with DeFi, NFTs, DAOs, and decentralized storage (IPFS, Arweave) is preferred. Familiarity with authentication protocols like JWT, OAuth2, and SIWE (Sign-In With Ethereum/Solana), understanding of smart contract vulnerabilities, and Web3 security best practices are required. Experience with zk-rollups (zk-SNARKs, zkSync, StarkNet), exposure to other chains like Cosmos, NEAR, or React Native/mobile dApps, contributions to open-source blockchain projects, knowledge of MEV, gas fee estimation, and bridging mechanics across chains will be an added advantage.,

As a Blockchain Developer at Aindriya Marketing Solutions Pvt. Ltd., located in Kochi, India, you will be an integral part of our team with a focus on developing cutting-edge blockchain solutions. With at least 2 years of experience in the field, you will play a key role in the design, development, and deployment of decentralized applications, smart contracts, and blockchain integrations. Your responsibilities will include designing and deploying smart contracts using Solidity or other blockchain programming languages, building and maintaining decentralized applications on platforms like Ethereum, Binance Smart Chain, or Polygon, and implementing blockchain security best practices to ensure the safety and integrity of transactions. You will also work on developing and integrating APIs for blockchain interactions, collaborating with front-end and back-end developers, conducting code reviews, debugging, and optimizing performance. To excel in this role, you must possess a strong knowledge of blockchain fundamentals, cryptography, and decentralized finance (DeFi) concepts. Proficiency in Solidity, Rust, or other blockchain programming languages is essential, along with experience working with Ethereum, Binance Smart Chain, or Hyperledger. Hands-on experience with Web3.js, Ethers.js, Truffle, or Hardhat is preferred, as well as familiarity with smart contract security and best practices. Knowledge of NFTs, DeFi protocols, token standards (ERC-20, ERC-721, ERC-1155), IPFS, Layer 2 solutions, and cross-chain technologies will be beneficial. Strong problem-solving skills and the ability to work in an agile environment are also key requirements. Preferred skills for this role include experience with React.js, Node.js, or Python for blockchain integration, familiarity with DevOps tools for smart contract deployment, previous contributions to open-source blockchain projects, and experience in developing DeFi applications, DAOs, or NFT marketplaces. In return, we offer a competitive salary based on your experience and skills, flexible work arrangements including remote and hybrid options, the opportunity to work on cutting-edge blockchain projects, and skill development and learning opportunities in Web3 and DeFi technologies. If you are passionate about blockchain technology and eager to work on innovative projects, we would love to hear from you! Job Types: Full-time, Part-time Benefits: - Cell phone reimbursement - Internet reimbursement Location Type: In-person Schedule: Day shift Experience: blockchain: 1 year (Required) Work Location: In person To speak with the employer, contact: +91 8089937888.,