Javascript jobs in crypto and blockchain companies

Note: We are only looking for candidates who have been a part of a successful zero-to-one journey in an organization. If you have experience in taking projects from the initial stages to full launch, we would love to hear from you.Metaschool produces courses for devs to build, ship, and learn Web3.We’re a decentralized, remote-first company with teammates based in Singapore, India and Pakistan. We are divided by borders, but our common mission to help developers build and flourish in the web3 ecosystem has brought us very close.Our Core Values:🏗 Buidl dope shit! - We care about what you have built, not your degrees or FAANG experience.🌈 Stay weird - Own yourself, be yourself! Diversity is our strength!🏔 Improve daily - Daily efforts compound. Don’t underestimate them.☝ Developers come first - We are building for devs. Put them first, always!📝 Learners for life - Leave your ego outside, learn whenever you can.🤝 Collaborate to win - If you want to go far, collaborate and go with a team.About the Role:We're looking for a Senior Fullstack Developer with 4+ years of experience to join our team. You'll be working with our tech stack that includes Next.js, HTML Tailwind, and Node.js. Your main goal will be to build and maintain high-quality web applications. Knowing React.js is crucial for this role, as it's a key part of our development process.Responsibilities:Build and maintain web applications using Next.js, HTML Tailwind, and Node.jsWrite clean and efficient code.Combine user-facing elements developed by front-end developers with server-side logic. Ensure the entire application is robust and easy to manage.Solve complex performance problems and architectural challenges.Stay updated with new updates in our tech stack and related technologies.Who You Are:You have 4+ years of experience in full-stack development.You have a solid understanding and experience with React.js, as well as familiarity with Next.js, HTML Tailwind, and Node.js.You have a solid understanding of SQL and databases.You're proficient in JavaScript and understand the basics of front-end technologies.You're familiar with code versioning tools like Git.You have a problem-solving attitude and can work both independently and within a team. Good communication skills to collaborate with team members and other departments.Perks:At Metaschool, you'll have exposure to all aspects of building a company. Additional perks include:🔮 Competitive salary🔮 Generous equity🔮 Health insurance🔮 Paid time off🔮 Workstation allowance🔮 Tech subscriptions🔮 An amazing team!We can’t wait for you to join our data-driven mission of developer empowerment. While you’re applying, consider following us on Twitter and LinkedIn.

The Role: We are looking for a Senior iOS Developer for one of our clients. You are a perfect candidate if you are growth-oriented, you love what you do, and you enjoy working on new ideas to develop exciting products. What we’re looking for: Minimum of 5 years of extensive experience with iOS development. Proven experience with Swift for iOS development. Experience with Flutter and React Native for cross-platform development. Strong understanding of iOS development concepts including UIKit and SwiftUI. Familiarity with iOS application architecture patterns, responsive design, and state management. Responsibilities:   Lead the design, development, and maintenance of high-quality iOS applications using Kotlin, Flutter, and React Native. Utilise Flutter and React Native to build efficient and responsive cross-platform mobile applications for iOS devices. Collaborate with UI/UX designers to implement visually appealing and user-friendly interfaces for iOS applications. Conduct thorough code reviews to ensure code quality, consistency, and adherence to best practices. Implement and advocate for automated testing strategies. Identify and  address performance bottlenecks within iOS applications, optimise code and resources for improved efficiency.    What we offer:   Get paid, not played No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options. Predictable project hours Enjoy a harmonious work-life balance with consistent 8-hour working days with clients. Flex days, so you can recharge Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify. Career-accelerating positions at cutting-edge companies Discover exclusive long-term remote positions at the world's most exciting companies. Hand-picked opportunities just for you Skip the typical recruitment roadblocks and biases with personally matched positions. One seamless process, multiple opportunities A one-time contracting process for endless opportunities, with no extra assessments. Compensation Enjoy the same pay, every month with positions landed through Proxify.

Mysten Labs believes that decentralized and open protocols are the bedrock of the internet of value. This is why at Mysten Labs, we are creating foundational infrastructure to accelerate the adoption of decentralized protocols based on blockchain technologies.As part of the DevX - Programmability team, you will help build the mission-critical platform and tooling for the Sui network. As these are the principal way that the ecosystem interacts with Sui, your impact is highly-visible, supporting all developers, partners, and projects/dApps building on Sui. You will create new SDKs, APIs, and adapters that enable developers to efficiently and intuitively interact with Sui and the Move language, drive standards across the ecosystem, build data platform/infrastructure for dApps to run at scale, and design new architectures to support future dApp challenges.What You'll Do:API Development:Demonstrate expertise in constructing and managing APIs, ensuring seamless operation at scale.Contribute to the enhancement and optimization of API functionalities, with a focus on performance and reliability.Language Competence:Exhibit a strong command of low-level programming languages, notably Rust.Possess a foundational understanding of Javascript/Typescript to facilitate effective collaboration across a diverse tech stack.Effective Communication:Communicate articulately and efficiently, especially when engaged with remote teams.Facilitate discussions on intricate technical matters with both technical and non-technical stakeholders.Collaborative Team Player:Collaborate seamlessly with cross-functional teams throughout the entire development lifecycle.Participate actively in the conceptualization, development, and standardization of API functionalities, with a specific focus on tooling and platform projects.Community Engagement:Actively engage with open source developers to strengthen community ties.Facilitate onboarding processes, ensuring developers are aligned with our ecosystem.Play a pivotal role in code reviews and design discussions to maintain efficiency and coherence in development processes.Our Ideal Candidate Would Have:5+ years of experience developing software on a team.Experience in building APIs and supporting production services at scale.Proficiency with a low-level programming language such as Rust, Go, or C/C++ and familiarity with JavaScript/TypeScript.Excellent interpersonal communication skills needed to partner effectively with teams in a fully remote environment, and the ability to discuss complex topics with technical and non-technical audiences alike.A solid understanding of software design patterns, and how to build components that are reusable, extensible, and modularIf you are a skilled software engineer who thrives in collaborative environments and is passionate about enhancing developer technology at scale, we invite you to join our team and contribute to the development of cutting-edge tools and platforms.Our team is remote first and we are hiring across the world. Here at Mysten Labs, you’ll be joining a world-class team with tremendous growth potential as we bring the next billion users to web3. We raised a $300M Series B round from top Silicon Valley led venture funds like Jump Crypto, Andreessen Horowitz (a16z), Binance Labs, Redpoint, Lightspeed, Coinbase Ventures, Electric Capital, Standard Crypto, NFX, Slow Ventures, Scribble Ventures, Samsung Next, Lux Capital, among other investment firms and strategic partners. Come join us and build the future of web3!

Tether, the founder of the first, largest, and most widely used stablecoin USD₮, is rapidly expanding into a wide range of sectors, including secure and unstoppable communication technologies, energy production, mining, and further fintech infrastructure. All of these themes share and are deeply rooted in the principles of Bitcoin, which include decentralization, resilience, openness, freedom, security, and scalability. Tether stablecoins are used to power a wide variety of enterprises, including exchanges, wallets, payment processors, and financial services, by facilitating the use of reserve-backed tokens across blockchain networks. Tether stablecoins offer a global, secure, and instant means of storing, transmitting, and receiving digital tokens at a fraction of the cost of alternative traditional financial solutions. Unwavering transparency is of paramount importance and central to Tether's foundational principles. Our dynamic team operates entirely remotely, uniting talent from every corner of the globe. Our journey has been marked by rapid growth and efficient operations, firmly establishing us as pioneers within the industry. If you possess a passion for venturing into uncharted territory and believe in your ability to conquer even the most formidable challenges, we eagerly invite you to engage with us. Join our mission, and together, let's lay the groundwork for a decentralized future that reshapes industries far beyond the realm of stablecoins. As a Senior Backend Developer, you will be a part of the team that works on the development of Tether backend components New Products and Features - Tether continuously strives to create innovative new features in order to provide the most professional trading experience for customers. These are developed and deployed using agile methodologies, to ensure the user experience remains the best in the industry. Scalability - all backend services that power Tether must remain effortlessly smooth, responsive, and real-time for customers as the platform continues to scale to accommodate new user growth. Security - Security is the most important feature. The Backend Development team is responsible for building all the services and core processes with the highest security principles and standard, in order to protect the safety of the entire user base.Exceptional Node/JavaScript skillsFamiliar with microservices architectureHave actively participated in the development of a complex platformFamiliar with Peer-to-Peer technologiesGood experience in interacting with databases (MySQL, MongoDB)Ability to quickly learn new technologiesGood understanding of security practices Nice to have Experience with blockchain integrationComfortable with high-availability conceptsRuby, Rust or C++ skills are a plusOther technologies of interest: Message queues (Redis), Caches and Job Queues

About Messari. Messari is the leading provider of crypto market intelligence products that help professionals navigate crypto/Web3 with confidence. We bring transparency and smarter qualitative and quantitative analytics to the industry by combining a global research database with a comprehensive suite of data visualization and asset discovery tools. We help drive smarter participation in crypto from individuals and institutions alike.   The name “Messari” came from the Franciscan monks who declared "clean books" a moral imperative during the renaissance and pushed merchants to use proper accounting methods.  This led to the flourishing of investment via "trust but verify" methods and industry growth throughout Europe. That's what we aim to do. Provide participants, investors, builders, platforms, and everyone else with reliable information to better participate in the crypto ecosystem.   Our users range from some of the most prominent analysts, investors, and crypto individuals to top organizations including Coinbase, BitGo, Anchorage, 0x, Chainanalysis, Ledger, Compound, MakerDAO, and many more.Position Overview:We are looking for a skilled Front-End Engineer specializing in creating data entensive visualizations using Observable Plot. In this role, you will collaborate with cross-functional teams, including designers, data engineers, and backend developers, to build intuitive and responsive interfaces that present complex datasets in clear and engaging ways.   * This is a short term contract ranging from 1-3 months.    Key Responsibilities: Design and develop interactive data visualizations using Observable Plot, D3.js, and ReactJS. Work closely with designers to translate visual concepts into functional and interactive data representations. Collaborate with backend engineers to fetch, process, and display dynamic data from various sources. Ensure the scalability, performance, and accessibility of web applications across different devices and browsers. Optimize and refactor existing code to improve performance, maintainability, and modularity. Stay up-to-date with the latest trends and best practices in front-end development and data visualization. Write clean, maintainable, and well-documented code that follows industry standards and best practices. Conduct code reviews and provide constructive feedback to peers. Troubleshoot and resolve issues related to web application performance, bugs, and user experience. Required Qualifications: Proven experience with Observable Plot and D3.js for creating interactive data visualizations. Bachelor’s degree in Computer Science, Information Technology, or a related field, or equivalent practical experience. 3+ years of experience in front-end development, with a strong focus on JavaScript, HTML, and CSS. Experience with version control systems, particularly Git. Proficiency in modern JavaScript frameworks and libraries (e.g., NextJS). Strong understanding of web performance optimization, including experience with lazy loading, bundling, and caching. Familiarity with RESTful APIs, WebSockets, and other data-fetching techniques. Excellent problem-solving skills and attention to detail. Strong communication skills and the ability to work effectively in a collaborative team environment.

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!