Web applications jobs in crypto and blockchain companies

Frontend Engineer
Sei Labs
About SeiSei Labs builds open sourced technology for the high-performance Sei Blockchain, the first parallelized EVM Layer 1 blockchain designed to scale with the industry. The unique optimizations built into Sei enable Web3 applications to reach Web2 level scale and performance, driving the mass adoption of digital assets.Our teams are comprised of former Google, Goldman Sachs, Robinhood, Nvidia, and Databricks veterans dedicated to onboarding the next billion users onto a vibrant ecosystem of applications.Sei Labs has raised over $30M from top investors including Jump Crypto, Multicoin Capital, Coinbase Ventures, Distributed Global, Hudson River Trading, and Flow Traders.We're a globally distributed team with a fully remote workforce. Check out our website and docs for more details.Frontend Engineering at SeiSei Labs is looking for a Frontend Engineer to help shape the future of Web3 by building innovative, high-impact applications across the Sei Blockchain. You'll work with a team at the forefront of blockchain technology, collaborating closely with our ecosystem partners to develop cutting-edge dApps spanning diverse Web3 domains (from DEX’s and games, to DePin AI and beyond). If you're passionate about constant learning, rapid development, and making a tangible impact in a fast-paced, community-first environment, this is a unique opportunity to push the boundaries of what's possible in decentralized technology.Requirements3+ years of frontend development experienceExpert in JavaScript/TypeScript and modern frontend frameworksExperience building production-grade web applicationsExperience with RESTful APIs and backend integrationNice to HaveWeb3 experience (smart contracts, ethers, viem)Cloud services (AWS)Database management (SQL/NoSQL)ResponsibilitiesDevelop and maintain key frontend applications (Sei website, app, etc)Build responsive web applications using modern JavaScript frameworksIntegrate Web3 functionality into frontend applicationsCollaborate with backend teams on API integrations#LI-CG1
👉🏻 Remote
👉🏻 Full time
🌐 USA

4 days ago

Frontend Developer
ENS Labs
Ethereum Name Service (ENS) is a decentralized, permissionless naming system built on the Ethereum blockchain that enables human-readable names (like "myname.eth") to be linked to standard Ethereum addresses and other distributed systems.As one of the first protocols built on Ethereum, ENS has enabled over 3 million registered .eth names, and over another 20 million ENS names from teams such as Coinbase, Uniswap, and Linea, as well as integrations with hundreds of other apps, wallets, protocols, and browsers in the crypto ecosystem.ENS Labs has been driving the core development of the ENS protocol since 2018. We created the ENS app, open-source libraries, and core smart contracts. We are on a mission to make crypto-powered experiences as easy and accessible as browsing the web. Join us as we build the next iteration of our protocol, ENSv2, and pioneer a more decentralized, flexible, and scalable ENS for the future.About the RoleWe're looking for a Frontend Engineer to help build and maintain the user-facing applications that power Ethereum Name Service (ENS). In this role, you'll work on creating intuitive, seamless, and beautiful interfaces that allow users to interact with ENS and the decentralized web. As part of a small, agile team, you'll be directly involved in designing and building innovative frontend experiences that enhance the usability of ENS and drive the adoption of Web3 technologies.If you are passionate about Web3 and want to help build the future of digital identity in an open, decentralized way, we encourage you to apply!What You’ll DoWork closely with cross-functional teams to build intuitive web applications that integrate smoothly with wallets, smart contracts, and APIs.Develop, test, and deploy high-quality web applications for ENS, focusing on delivering scalable and user-centric experiences.Innovate by introducing new ideas, tools, and technologies to enhance our platform and iterate on existing features.Collaborate with product and design teams to gather user feedback, analyze business needs, and translate them into impactful features and improvements.Adhere to industry best practices for secure frontend development in the Web3 space.Continuously improve testing frameworks, thoroughly testing your code with multiple test types. Stay informed on the latest Web3 development practices, tools, and trends.Who You Are3+ years of experience as a frontend engineer, with a proven track record of building and deploying web applications.Strong experience with Typescript and frontend development.Ability to create clean, responsive, and user-friendly interfaces that enhance the user experience.Comfortable working with both structured design systems and crafting solutions in a fast-paced environment.Proficient in debugging and resolving issues related to user input and edge cases.Strong communication skills, able to coordinate effectively with designers, engineers, and external partners.Ability to work efficiently under deadlines while maintaining high-quality code standards.A genuine passion for Web3 technologies and an appreciation for and the values that underpin Web3 technologies (e.g. blockchain, smart contracts, and decentralized governance).It’s a Plus, if You HaveExperience building decentralized applications (dApps) or working with decentralized protocols like ENS or other Ethereum-based projects.Knowledge of Solidity or smart contract development.
👉🏻 Remote
👉🏻 Full time
🌐 Northern America

52 days ago

Senior Penetration Tester
Bishop Fox
Bishop Fox is the leading authority in offensive security, providing solutions ranging from continuous penetration testing, red teaming, and attack surface management to product, cloud, and application security assessments. We’ve worked with more than a quarter of the Fortune 100, half of the Fortune 10, eight of the top 10 global technology companies, and all of the top global media companies. Our Cosmos platform, service innovation, and culture of excellence continue to gather accolades from industry award programs including Fast Company, Inc., SC Media, and others. For more than 16 years, we've been contributing and giving back to the security community. We’ve published more than 16 open source tools and 50 security advisories in the last five years alone. Learn more at bishopfox.com or follow us on social media.  We’re looking for talented, experienced professional hackers to help us secure some of the world’s most complex software and sophisticated technologies. You’ll be working alongside our Mexico, US, and other internationally-based teams supporting clients across multiple industries.                                                    Responsibilities You’re a penetration tester who knows their way around source code. You’ve plundered apps and pillaged networks (legally, of course). You have a passion for hacking and information security. You may also have written a few blog posts about your favorite hacks or have presented at a handful of conferences – with an eye to doing more. With Bishop Fox, your responsibilities would include testing web applications, hacking networks, and reversing software. As a consultant, you’ll work on a variety of projects which include short-term engagements and extended program work with well-established clients. You'll solve challenging technical problems and build creative solutions. As a trusted advisor, you’ll provide your expert opinion to help our clients navigate difficult business decisions.         Requirements 7+ years experience in planning, conducting, and managing web application penetration tests 5+ years of application security experience Deep understanding of security fundamentals (OWASP), common vulnerabilities, and application security best practices Skilled in vulnerability assessment and the development of exploits for diverse targets Background in system and network security, authentication and security protocols, and applied cryptography is helpful Experience with programming and scripting languages such as Python, Ruby, PowerShell, Java, JavaScript, etc. Experience with AWS cloud environments preferred with an understanding of its major technologies, such as IAM, EC2, VPC, EBS, S3, CloudWatch, and Lambdas, and how to keep them secure Proficiency with operating systems- Linux, Windows, MacOS Experience with network and system exploitation including modern tactics, techniques, and procedures (e.g. c2 frameworks, EDR bypass, privilege escalation, password cracking, lateral movement, etc.) Strong technical reporting and documentation skills Advanced relevant academic training, such as a degree in Computer Science or an OSCP, is a definite bonus Bishop Fox has always allowed its employees to work remotely, and this role could work anywhere in Mexico. Our comprehensive benefits program is tailored to meet your needs. We embrace diversity and an inclusive culture. We value our employees and who they are, which fosters a powerful and collective talent base to successfully serve our clients and the security community with unparalleled expertise.  Bishop Fox is an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex including sexual orientation and gender identity, national origin, disability, protected veteran status, or any other characteristic protected by applicable federal, state, or local law.  All new hires must pass a background check as a condition of employment. Interested? Apply today!   
👉🏻 Remote
👉🏻 Full time
🌐 Mexico

116 days ago

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