OKX will be prioritising applicants who have a current right to work in Singapore, and do not require OKX's sponsorship of a visa   About OKX Founded in 2017, OKX is one of the world’s leading cryptocurrency spot and derivatives exchanges. OKX has adopted innovative blockchain technology to reshape the financial ecosystem by offering some of the most diverse and sophisticated products, solutions, and trading tools on the market. Trusted by more than 20 million users in over 180 regions globally, OKX strives to provide an engaging platform that empowers every individual to explore the world of crypto. In addition to its world-class DeFi exchange, OKX serves its users with OKX Insights, a research arm that is at the cutting edge of the latest trends in the cryptocurrency industry. With its extensive range of crypto products and services, and unwavering commitment to innovation, OKX’s vision is a world of financial access backed by blockchain and the power of decentralized finance.   Team Profile  We are seeking a talented and experienced Blockchain Developer to join X Layer (zk layer2 based on Polygon CDK) or ZK-Dex(based on zkwasm) development team. As a Blockchain Developer, you will be responsible for designing, implementing, and maintaining blockchain-based solutions. Additionally, you will provide support for hackathons to encourage innovation and collaboration within the X Layer community and contribute to the Polygon CDK, or participate in the design and development of ZK spot/perpetual/united account dex.   Find out more about us here .   Roles & Responsibilities Optimize X Layer performance, enhance on-chain infrastructure, and develop related products. Stay up to date with cutting-edge blockchain technologies and establish a world-class on-chain infrastructure. Collaborate with product and marketing teams to define and implement technical solutions for the public chain and provide necessary technical support.   Requirements  Proficiency in Go or Rust , with experience reading core code of major public chains or L2 solutions (e.g., Ethereum, Solana, Polygon CDK, Aptos, Arbitrum ). Strong understanding of blockchain fundamentals, including consensus mechanisms, P2P networks, and cryptography . Excellent teamwork, communication, and logical thinking skills. A deep passion for blockchain technology with a commitment to continuous learning.   Good to have    Skilled in cryptographic algorithms such as homomorphic encryption, ring signatures, threshold signatures Hands-on experience with blockchain platforms like Ethereum, Cosmos, Bitcoin, EVM or Webassembly virtual machine. Hands-on experience with L2 platforms such as Polygon ZKEvm, ZKSync Era, Linea, Taiko, Scroll, etc. Experience in zero-knowledge proof development, especially zkvm, and familiarity with principles of plonk/halo2/KZG/FRI and related libraries or circuit development languages, such as plonky2, Circum, gnark An active participant or active member of local/international cryptography conferences Fluent in spoken and written English Perks & Benefits Competitive total compensation package L&D programs and Education subsidy for employees' growth and development Various team building programs and company events Wellness and meal allowances  Comprehensive healthcare schemes for employees and dependants  More that we love to tell you along the process!