Senior Engineer - Payments & Wallet

Design, develop, and enhance core modules of custodial wallets, focusing on account management, deposits, withdrawals, sweeping, signing, and transaction broadcasting.Seamlessly integrate diverse blockchain protocols (BTC, ETH, Solana, Tron, Cosmos, etc.) utilizing RPC, SDKs, or custom solutions to maintain stable and high-availability operations.Contribute to the architectural and modular design of the wallet system, driving improvements in scalability, reliability, and performance.Establish automated monitoring, alerting, and logging systems to ensure comprehensive traceability of asset flows.Create high-quality, testable code, actively engaging in code reviews and CI/CD processes.Work collaboratively across teams, including frontend, DevOps, security, and risk management, to optimize overall system performance and security.

Join OKX as a Staff/Senior Staff Engineer focused on advancing our Web3 Wallet technology. In this role, you will be at the forefront of building robust backend infrastructure for our Account Abstraction (AA) Wallet and developing essential services for products like OKX Pay and CeDeFi Wallets. Collaborate with a talented team to innovate and enhance user experiences in the rapidly growing crypto ecosystem.

Join Binance, the world's foremost blockchain ecosystem powering the largest cryptocurrency exchange by trading volume and user base. With over 300 million users across more than 100 countries, we are known for our exceptional security, transparency in handling user funds, rapid trading engine performance, deep liquidity, and an extensive range of digital asset products. Our suite of offerings spans trading, finance, education, research, payments, institutional services, Web3 innovations, and beyond. At Binance, we harness the transformative potential of digital assets and blockchain technology to cultivate a holistic financial ecosystem that champions monetary freedom and enhances financial accessibility globally.As a Senior Frontend Developer specializing in wallet solutions, you will play a crucial role in designing and developing high-performance web applications that cater to a diverse clientele, including retail users, high-net-worth individuals, institutions, and enterprises. We are looking for a proactive self-starter who thrives on taking features from conception to completion, ensuring an engaging user experience and seamless integration of our services.

Join Us as a Principal Software Engineer - Trade & BlockchainAre you ready to make a significant impact in the world of finance and blockchain technology? As a Principal Software Engineer at grvt, you will lead the development of critical production code within our complex platform, ensuring high reliability and operational excellence.Your ResponsibilitiesDevelop and manage high-stakes production code in the most intricate and essential areas of our platform.Oversee system performance in production, particularly during challenging scenarios like failures and high-stress conditions.Navigate through ambiguous problem spaces, clearly defining constraints and potential risks.Proactively identify and mitigate technical, operational, and product risks through thoughtful design and operational discipline.Simplify complex systems by removing unnecessary complexities and unsafe patterns.Establish technical direction through reference implementations and sustained ownership of key systems.Serve as a technical mentor by providing insightful code reviews and leading design discussions.Impact product and technical decisions through a deep understanding of system behaviors and long-term trade-offs.Actively engage in incident responses, ensuring improvements through thorough root-cause analysis.Elevate standards for correctness, reliability, and operational excellence.Qualifications We SeekWe are on the lookout for outstanding individual contributors who excel in our core competencies and leverage their unique strengths effectively.You should possess:A proven history of owning and advancing complex, production-critical systems.Exceptional engineering judgment in high-risk or uncertain environments.A strong understanding of failure modes, edge cases, and consequential effects.Robust operational ownership, including designing for observability and recovery.The talent to simplify complicated systems while maintaining essential correctness and safety.A track record of influencing others through code quality and technical credibility.

At OKX, we are on a mission to redefine the future of cryptocurrency by making it accessible to everyone. We are looking for a talented Senior Product Designer to lead the design of our Web3 Wallet products. In this role, you will be responsible for crafting exceptional user experiences, owning transaction workflows, and optimizing data displays. Join our innovative team and contribute to shaping the future of decentralized finance!

Join the Revolution in Web3 Development!At Overmind, we are on a mission to empower developers to transition seamlessly into the Web3 landscape. We are committed to reducing the barriers that hinder the growth of the crypto ecosystem, providing innovative solutions that facilitate learning and career advancement.Our platform offers a diverse range of quests designed in collaboration with leading Web3 companies, including startups from the Aptos ecosystem. These quests cater to individuals at varying levels of coding proficiency, ensuring everyone has the opportunity to enhance their skills and explore exciting roles in the Web3 field.Become part of a community where collective intelligence drives innovation. Discover more at overmind.xyz.

Blockchain.com is at the forefront of transforming the financial landscape, connecting individuals globally to the future of finance. As the most trusted and rapidly expanding global cryptocurrency platform, we empower millions to engage with cryptocurrency safely and efficiently. Since our establishment in 2011, we have gained the confidence of over 90 million wallet holders and facilitated over $1 trillion in crypto transactions across more than 40 million verified users.We are seeking a dedicated Institutional Sales Associate to spearhead the growth of our institutional business in the APAC region. In this pivotal role, you will manage high-value institutional accounts, drive long-term revenue growth, and ensure an exemplary client experience in our innovative offerings.You will operate at the intersection of traditional finance and decentralized technology, promoting our extensive suite of services including OTC Spot, Options, and customized Market Making solutions. This position demands a strong passion for business development, a keen understanding of the crypto landscape, and the ability to foster complex institutional relationships in both English and Korean.

Join Zodia Custody as a Compliance Director in Singapore, where you will play a pivotal role in ensuring our operations adhere to the highest regulatory standards. Your leadership will be crucial in navigating the complex landscape of compliance within the cryptocurrency and digital asset space.

About YouTrip YouTrip is a leading multi-currency payment platform in Asia Pacific. Since launching in 2018, the company has introduced Asia's first multi-currency digital wallet and now supports millions of users, processing over US$15 billion in payments each year. With offerings for both consumers (YouTrip) and businesses (YouBiz), the company delivers accessible and cost-effective financial solutions. YouTrip has raised over US$110 million, including a recent Series B round led by Lightspeed Venture Partners. The team is committed to advancing digital financial services across the region. Recognition includes being named a Global Innovator 2025 by the World Economic Forum and a spot on CNBC’s World’s Top Fintech Companies for 2024 and 2025. Diversity, inclusion, and an entrepreneurial mindset are core to the culture. Role Overview The Senior Engineering Manager will play a key role in leading the development of scalable applications at YouTrip’s Singapore office. This position manages several engineering squads, guiding them to deliver products that range from backend services to front-end applications, serving millions of users. This leader will collaborate closely with cross-functional teams, ensuring projects stay aligned and teams work effectively together. The role also shapes engineering strategy, influences culture, and steers execution as the company grows its fintech offerings throughout Asia Pacific. What You Will Bring Significant experience as an Engineering Manager or Senior Engineering Manager Strong technical foundation and leadership skills Proven success working across diverse teams and domains Background in building and scaling comprehensive products for a large user base YouTrip welcomes candidates who are eager to help shape the future of digital financial services in Asia Pacific.

At moomoo, we are dedicated to crafting a secure and innovative platform for our users amidst the fast-paced evolution of Web3 technologies. As a Security Engineer with a focus on Web3, you will be instrumental in safeguarding the integrity and security of our blockchain infrastructure and decentralized applications. Your role will be crucial in protecting our digital assets and user information from potential threats and vulnerabilities.Key ResponsibilitiesDesign and implement security measures and protocols for decentralized applications (dApps) to shield against vulnerabilities while ensuring optimal system performance.Perform comprehensive security audits and testing of smart contracts, identifying and addressing potential exploits before they can be exploited by malicious entities.Collaborate closely with development teams to embed security best practices throughout the application lifecycle, from initial design through to deployment.Continuously monitor and analyze the security landscape of Web3 technologies to stay ahead of emerging threats and exploit trends.Lead incident response efforts for security breaches, conducting forensic analyses, and developing strategies to mitigate future risks.

Join Binance, the world's largest cryptocurrency exchange, as a Senior QA Engineer focused on our cutting-edge trading technology. In this role, you will be instrumental in ensuring the quality of our high-performance backend software stack, overseeing the complete testing lifecycle. Your responsibilities will include designing comprehensive test plans, identifying and addressing issues, developing automated scripts, and executing tests to enhance our software iterations. This full-time position offers the flexibility of hybrid work arrangements in the APAC region.

BitMEX seeks a Senior Offensive Security Engineer to join the Product Security team in Singapore. This position centers on maintaining critical security systems that protect the platform’s architecture. Collaboration with engineering and DevOps teams is a core part of the role, providing guidance on security best practices. Role overview This role focuses on safeguarding the platform by ensuring key security controls remain effective and up to date. The Senior Offensive Security Engineer will work closely with technical teams to identify risks and help implement practical solutions. What you will do Maintain and improve security systems that defend the platform’s infrastructure Support engineering and DevOps teams by advising on secure design and implementation Promote security best practices across the organization Location This position is based in Singapore.

Join OKX as a Senior/Lead Algorithm Engineer, where you will play a pivotal role in driving our innovative algorithms to enhance our global presence. You will be responsible for developing and optimizing advanced algorithms that support our expansion into new markets. You will collaborate with cross-functional teams to ensure our technological solutions align with our strategic growth objectives.

At Fun.xyz, we envision a tokenized future that empowers individuals worldwide, providing financial freedom to everyone with internet access. In order to foster a blockchain-driven global economy, the process of value exchange must be intuitive, secure, and seamless. Introducing Checkout - the leading payment solution in the web3 space. By integrating Checkout, decentralized applications (dApps) allow users to perform any on-chain action using cryptocurrency from a wallet, centralized exchange, or fiat on-ramping from a card or bank account. With access to top-tier routing and their asset portfolio at the point of sale, users become more engaged and loyal. For dApps, Checkout enhances user acquisition without the need for launching new chains or integrating various third-party providers. We created Checkout because we believe in a world where anyone, anywhere can purchase anything using any asset. If you share this vision, we would love to hear from you. About the RoleWe are seeking a skilled Product Engineer (Mid, Senior, Staff) to join our dynamic team and contribute to the evolution of crypto payments. In this role, you will design and enhance SDK software that powers Checkout across both web2 and web3 environments, collaborating across the technology stack to ensure balance between performance, reliability, and user experience. You will work closely with protocol, backend, and business teams to tackle complex challenges and build scalable tools that address the ever-changing needs of on-chain payments. Experience in cryptocurrency is a plus, but we welcome fast learners from diverse technical backgrounds.

Join OKX as a Senior/Staff Engineer in Data Governance, where you will play a vital role in enhancing our data management capabilities and ensuring the integrity of our data across various platforms. You will be responsible for developing and implementing data governance frameworks, collaborating with cross-functional teams to enforce data standards and policies, and leveraging your expertise to drive improvements in our data quality and accessibility. Your contributions will directly impact our mission to provide a safe and reliable crypto trading experience.

Join Binance, a pioneering leader in the blockchain ecosystem and the world's largest cryptocurrency exchange by trading volume and registered users. With a community of over 300 million users across more than 100 countries, we are renowned for our exceptional security measures, transparent user fund management, rapid trading engine capabilities, and extensive liquidity. Our diverse portfolio encompasses trading, finance, education, research, payments, institutional services, Web3 functionalities, and more. At Binance, we harness the transformative power of digital assets and blockchain technology to create an inclusive financial ecosystem that promotes monetary freedom and enhances financial accessibility for individuals globally.

Join OKX as a Senior/Staff AI Engineer in our Anti-Fraud Team, where you'll harness the power of AI and blockchain technology to combat scams and fraudulent activities. In this critical role, you will design and implement advanced algorithms to analyze on-chain data, enabling the identification and prevention of various forms of fraud. Your innovative solutions will play a key role in maintaining the integrity of our digital ecosystem, ensuring a safe trading environment for our users.

At Fun.xyz, we envision a tokenized future that empowers individuals globally, facilitating financial freedom for all who have internet access. For a blockchain-driven global economy to thrive, value exchange must be effortless, secure, and seamless. Introducing Checkout - the premier payment solution in the web3 space. By integrating Checkout, decentralized applications (dApps) enable users to conduct any on-chain transaction utilizing cryptocurrency from a wallet, centralized exchange, or converted fiat through a card or bank account. With access to cutting-edge routing and asset management at the point of sale, users experience enhanced speed, retention, and engagement. For dApps, Checkout amplifies user acquisition potential without the need for new chains or multiple third-party integrations. We developed Checkout with a vision of a world where anyone, anywhere, can make purchases with any asset. If this vision resonates with you, we encourage you to apply. About the Role We are seeking a Backend Engineer to join our expanding team at Fun.xyz and contribute to the architecture of backend services that underpin our web3 payment infrastructure. This position is crucial for the platform's success and will influence how payments, settlements, and transaction routing are managed across various chains and payment providers. You will develop high-performance, low-latency systems that accommodate complex scenarios such as asset conversion, identity verification, transaction finality, and decentralized routing, all while ensuring fault tolerance, scalability, and compliance for a worldwide user base.

Join Crypto Inc. as an AI Security Engineer, where you will play a pivotal role in safeguarding our advanced AI systems and ensuring the integrity of our digital infrastructure. In this dynamic environment, you will collaborate with cross-functional teams to identify vulnerabilities, implement robust security measures, and develop innovative solutions to combat emerging threats.