Consensys is the leading blockchain and web3 software company founded by Joe Lubin, CEO of Consensys and Co-Founder of Ethereum. Since 2014, Consensys has been at the forefront of innovation, pioneering technological developments within the web3 ecosystem. Through our product suite, including the MetaMask platform, Infura, Linea, Diligence, and our NFT toolkit Phosphor, we have become the trusted collaborator for users, creators, and developers on their path to build and belong in the world they want to see. Whether building a dapp, an NFT collection, a portfolio, or a better future, the instinct to build is universal. Consensys inspires and champions the builder instinct in everyone by making web3 universally easy to use and develop on. Our mission is to unlock the collaborative power of communities by making the decentralized web universally easy to access, use, and build on. You’ll get to work on the tools, infrastructure, and apps that scale these platforms to onboard one billion participants and 5 million developers. You’ll be constantly exposed to new concepts, ideas, and frameworks from your peers, and as you work on different projects — challenging you to stay at the top of your game. You’ll join a network of builders that reaches the edge of our ecosystem. Consensys alumni have moved on to become tech entrepreneurs, CEOs, and team leads at tech companies. About Metamask MetaMask aims to create a thriving engineering organization that supports the well-being of our engineers while empowering them to do work they are proud of and enjoy. We strive for an environment that gives our people high trust and autonomy, while also facilitating collaboration, communication and camaraderie among teams and teammates. We aspire to build a diverse engineering team, inclusive to people from all backgrounds and demographics. It is also of great importance to us that working at MetaMask is an experience that catalyzes career growth and learning. What you'll do This role is specifically within the Card team, which is focused on the development and integration of the MetaMask Debit Card and related features directly into the MetaMask platform. As a Senior Software Engineer on this team, you will be instrumental in building the core infrastructure and user-facing features that enable millions of users to securely and intuitively manage and use their MetaMask Debit Card within their wallet. Specifically, you will be responsible for: - Designing and implementing the front-end components and user experience for MetaMask Debit Card interactions across MetaMask clients. - Developing robust and scalable backend services and APIs to manage card lifecycle, facilitate transaction processing, and integrate with financial partners. - Ensuring seamless and secure integration with Card Issuers, payment networks, and compliance systems. - Optimizing the performance and security of all Card features, handling real-time data feeds and high-volume transaction throughput. Requirements: - 3+ years working with mobile-based technologies - 3+ years building websites and/or applications - Experience with React and React Native - Strong knowledge of modern Javascript (ES6/TypeScript/etc.) - Familiarity with blockchain fundamentals and Web3 integration - Working knowledge of cross platform/browser compatibility - Experience working with APIs and middleware services - Experience working in an agile development team - Experience developing applications with clean code practices, testing, and adherence to coding standards - Understanding of web-based security considerations Bonus Points: - Experience with payment processing, card issuing, or fintech products - Experience with DeFi protocols and/or digital asset management - Knowledge of financial products in the digital space - Interest in blockchain technologies and Web3 - Basic understanding of cryptography principles - Experience working in distributed teams - Previous experience working in Web3 - Familiarity with the Web3 wallet ecosystem - Experience with performance optimization Other skills to demonstrate: - Good verbal and written communication in English - Teamwork, flexibility, and organization - Eagerness to learn and grow your technical skills - Ability to balance technical quality with business needs and user experience Don't meet all the requirements? Don't sweat it. We’re passionate about building a diverse team of humans and as such, if you think you've got what it takes for our chaotic-but-fun, remote-friendly, start-up environment—apply anyway, detailing your relevant transferable skills in your cover letter. While we have a pretty good idea of what we need, we're ready for you to challenge our thinking on who needs to be in this role. It is a requirement of employment in this position that applicants will be required to submit to background checks including but not limited to employment, education and criminal record checks. Further details will be provided to applicants that successfully meet the criteria for the position as determined by the company in its sole discretion. By submitting an application for employment, you are acknowledging and consenting to this requirement. The salary range for US-based candidates only will be determined throughout the interview process depending on experience and skills. US pay range (not including bonus, equity or other benefits) $130,000—$187,000 USD In the rapidly evolving Web3 space, we believe that everyone is a builder. This expansive paradigm requires a range of backgrounds, talents, skills, and experiences to influence and shape the future. At Consensys, this diversity fuels our ability to shift control and redefine the realm of possibility. We are committed to ensuring that our technology empowers people and communities with economic and political agency through decentralized technologies. We welcome the range of perspectives and differences and celebrate them. We're excited to see how your unique skills as a builder can contribute to our vision, drive innovation, and help us shape a more inclusive Web3. Consensys is an equal opportunity employer. All employment decisions are made without regard to race, color, national origin, ancestry, sex, gender, gender identity or expression, sexual orientation, age, genetic information, religion, disability, medical condition, pregnancy, marital status, family status, veteran status, or any other characteristic protected by law. Consensys is aware of fraudulent recruitment practices and we encourage all applicants to review our best practices to protect yourself which can be found (https://consensys.io/careers/best-practices-to-avoid-recruitment-fraud/).