React jobs in crypto and blockchain companies

Who We AreFreedx is a newly established cryptocurrency exchange dedicated to providing a seamless, secure, and innovative trading experience. Our team comprises experienced professionals from the crypto, finance, and technology sectors, all passionate about driving the future of digital finance. At FreedX, we are committed to creating a platform that empowers our clients with the freedom to manage their digital assets confidently and efficiently.Our Vision:At FreedX, our vision is to be the most trusted and reliable cryptocurrency exchange, offering unparalleled freedom and scalability to our clients. We aim to build a platform where users can trade and manage their assets with complete peace of mind, knowing that their security and reliability are our top priorities. We strive to continuously innovate and adapt to the evolving needs of the crypto market, ensuring that our clients have access to the best tools and services to achieve their financial goals. Join us on our journey to redefine the standards of digital asset trading and experience the freedom, reliability, and scalability that FreedX has to offer.RoleWe are seeking a talented Frontend Developer with expertise in React and TypeScript to help build a high-performance, user-friendly interface for our cryptocurrency exchange. As part of the frontend development team, you will be responsible for creating and optimizing responsive, secure, and engaging user interfaces to provide an exceptional trading experience. This is an exciting opportunity to work on complex challenges in a fast-paced environment, with a focus on financial data, real-time updates, and a seamless user experience in the growing crypto industry. Key Responsibilities UI Development: Design and develop responsive and visually appealing user interfaces using React and TypeScript, ensuring a seamless and consistent user experience across devices. Real-Time Data Handling: Implement features to handle and display real-time trading data, charts, and notifications efficiently. Component Development: Create reusable components and libraries, adhering to best practices in design and coding standards. API Integration: Integrate with backend RESTful APIs and WebSocket services to facilitate data communication and real-time updates for trading activities and market data. Performance Optimization: Ensure high performance of the frontend application, optimizing for speed, responsiveness, and scalability. Security & Compliance: Follow security best practices to protect user data, particularly in relation to account and transaction information. Cross-Functional Collaboration: Work closely with UX/UI designers, backend developers, and QA engineers to deliver new features and improve existing ones based on user feedback. Testing & Quality Assurance: Write and maintain unit and integration tests to ensure high code quality, stability, and reliability. Documentation: Document code and maintain records of frontend standards, component libraries, and key processes to support development consistency. RequirementsRequired Skills & Experience Technical Proficiency: 3+ years of experience with frontend development, specifically with React and TypeScript. Strong knowledge of modern JavaScript (ES6+) and CSS. React Ecosystem: Proficiency with React libraries and tools (e.g., Redux, React Query, React Router) and component-based development. UI/UX Sensibility: Strong sense of design and attention to detail, with experience implementing UI designs and interactions for high-quality user experiences. Data-Driven Interfaces: Experience with real-time data handling, charting libraries (e.g., D3.js, Chart.js), and performance optimization. API Integration: Experience integrating with RESTful APIs and WebSocket services. Crypto & Fintech Knowledge: Familiarity with blockchain, cryptocurrency trading, or financial data is a plus. Testing & QA: Experience with testing frameworks such as Jest, Enzyme, or React Testing Library. Problem-Solving: Strong analytical skills and ability to solve complex technical challenges in a fast-paced environment. Communication Skills: Excellent communication and teamwork skills to collaborate effectively with a diverse team. Preferred Qualifications Experience with state management libraries (Redux, MobX) and custom hooks Familiarity with CI/CD pipelines and version control (Git) Knowledge of Web3, blockchain, or financial applications Experience working with design systems and component libraries BenefitsWhat We Offer:Competitive salary and performance-based discretionary bonuses,Flexible work schedule, hybrid/remote work opportunityGenerous paid leaveOpportunity for professional developmentFreedX is an equal opportunity employer. We stand for an open and inclusive work environment that fosters the well-being of everyone. We embrace and encourage differences in age, color, disability, ethnicity, family or marital status, gender identity or expression, language, national origin, physical and mental ability, race, religion, sexual orientation, socio-economic status, veteran status, and other characteristics that make our people unique.About the companyWho We AreFreedX is a newly established cryptocurrency exchange dedicated to providing a seamless, secure, and innovative trading experience. Our team comprises experienced professionals from the crypto, finance, and technology sectors, all passionate about driving the future of digital finance. At FreedX, we are committed to creating a platform that empowers our clients with the freedom to manage their digital assets confidently and efficiently.Our Vision:At FreedX, our vision is to be the most trusted and reliable cryptocurrency exchange, offering unparalleled freedom and scalability to our clients. We aim to build a platform where users can trade and manage their assets with complete peace of mind, knowing that their security and reliability are our top priorities. We strive to continuously innovate and adapt to the evolving needs of the crypto market, ensuring that our clients have access to the best tools and services to achieve their financial goals.Join us on our journey to redefine the standards of digital asset trading and experience the freedom, reliability, and scalability that FreedX has to offer.

Sequence is the award-winning all-in-one development platform for integrating web3 into games. Onboard, monetize, grow, and retain your players with our industry-leading technology. From collectibles and ownable rewards to fully on-chain experiences, Sequence’s modular stack solves technical challenges, allowing developers to concentrate on creative execution using our solutions: Sequence Builder, seamless smart wallet solutions, Marketplaces, Minter, Payments, Analytics, Indexer, Gas Tank and Relayer, Node Gateway, SDKs for mobile, Unity, and Unreal Engine, and more. Trusted by a growing ecosystem of web3, web2.5, and traditional games, Sequence is a well-capitalized company backed by some of the most prestigious investors in the gaming and web3 world, including Take-Two Interactive, Ubisoft, Xsolla, Bitkraft, Brevan Howard, Coinbase, Polygon, and others. Founded in 2018 as part of Horizon, our world-class team consists of gaming and tech industry veterans, leaders in the web3 space, engineers who have built wildly popular open source applications and standards, and founders who have built and sold successful companies.Position Overview:As a Senior Solutions Engineer at Sequence, you will be responsible for overseeing the integration of our SDKs and APIs into the game development processes of AAA studios. You will work closely with our clients to ensure seamless integration, provide technical support, and drive the development of innovative solutions. Your experience in designing and building high-quality SDKs, particularly for web-based games and decentralized applications will be crucial in helping us maintain our position at the forefront of Web3 gaming technology.Key ResponsibilitiesLead the integration of our SDKs and APIs into AAA game studios' development pipelines.Assist with the design and improvements of our SDKs for web in tandem with product and engineering.Collaborate with game developers to understand their needs and provide tailored integration solutions.Identify and adapt custom solutions that deliver strong business value to scale to the rest of our customer base.Offer technical guidance and support to clients during the integration process such as example code and architecture patterns.Stay updated with the latest trends and advancements in Web3 gaming and blockchain technology.Ensure our SDKs and APIs are secure, scalable, and easy to use.Work closely with cross-functional teams, including product management, engineering, and customer support, to deliver high-quality solutions.QualificationsBachelor's or Master's degree in Computer Science, Software Engineering, or a related field.Proven experience in integration solution development, particularly within the gaming industry.Extensive experience designing and building SDKs and games for the web.Strong understanding of blockchain technology and its application in gaming.Previous experience in Web3 gaming and the EVM space is a significant advantage.Proficiency in TypeScript and with frameworks such as React, Next.js.Excellent problem-solving skills and the ability to think critically such as solving complex integration issues.Strong communication skills, with the ability to explain complex technical concepts to non-technical stakeholders.A proactive, self-motivated approach and the ability to work independently as well as part of a team.Why Horizon?- A chance to deliver massive impact at a small and quickly growing company- Work on hard, big, meaningful problems that can shift markets- Competitive salary and equity package- Accelerate your career by joining at the early stages- Be part of defining web3, the next generation of the Internet, and creating symbiotic economies where both users and creators share in the value generated by networks- Work with an outstanding team made of wonderful people who have built and sold successful companies, launched amazing products, and have rich experience in infrastructure, architecture, blockchain, games, finance, investing, strategy, consulting, design, marketing, community, and more.- Work-life balance unlike the “crunch” culture you find at larger studios- New PC, and generous allowance for work-from-home setup for full time employees- Extensive health benefits for Canadian employees- We’re conscious about mental health and have modern vacation policies- We invest in everyone’s personal development- Learn more about our values and the traits we embody at https://careers.horizon.io/We are committed to diversity and encourage applicants from all backgrounds, genders and faiths. While we're building incredible products, we also want to add to our wonderful team and company. The best way to do that is to attract talented folks from all areas and to have their experiences inform their work.

................ For our client based in Zug, we are currently looking for a Full Stack Developer. This role has a high percentage of Home Office within Switzerland.  In this role, your main responsibility will be building applications using Go, React, and Svelte that are maintainable, well-documented, and include adequate test coverage. You will collaborate with the rest of the team managing various layers of the infrastructure. Your role will be divided between backend work in GoLang (70%) and frontend development in React and Svelte (30%). Your responsibilities: Develop scalable, robust, testable, and efficient code that's easy to maintain Build scalable applications capable of processing terabytes of data around the clock Translate software requirements into stable, high-performance solutions Contribute to architectural and design decisions, driving the development of an efficient, distributed microservices architecture Your background: 3+ years of experience with the Go language  Proficient in working with PostgreSQL and Microsoft PowerBI databases, including query and table optimization Experienced in designing and developing RESTful APIs with a solid understanding of gRPC Strong front-end development skills with React, Svelte, CSS, and Next.js Basic knowledge of WordPress is a plus Knowledge of common Goroutine and channel patterns Excellent problem-solving abilities with expertise in debugging and optimizing code Ability to implement high performance high available enterprise applications Understanding of Bitcoin, UTXO-based systems, and blockchain technology is an advantage Experience with Bitcoin mining infrastructure is highly valued Familiar with managing and orchestrating mining hardware, especially SHA-256 ASIC miners, is a strong plus Exposure to DevOps practices such as Docker, Kubernetes, AWS, and CI/CD pipelines is beneficial Fluent in English, German is nice to have About the companyCoopers iET AG ist eine agile Schweizer Recruiting Agentur, die Spezialisten und Führungskräfte in den Bereichen IT, Life Sciences, Engineering und Finance vermittelt. Mit flexiblen Ansätzen bringen wir Kandidat:innen und Unternehmen zusammen, die nicht nur fachlich, sondern auch menschlich zusammenpassen.

Mural, the leading visual work platform for the enterprise, makes teamwork feel like less work. Our intuitive visual workspace enables teams to easily work together and collaborate better using proven design-thinking techniques. Built for enterprise teams, Mural meets the most stringent of IT and regulatory requirements. Industry leaders — including IBM, ‌Microsoft, SAP, and Abercrombie & Fitch — choose Mural to help their teams accelerate innovation and problem solving at scale. Whether your team is fully remote, distributed, in the office, or still figuring it out, Mural brings teams across the enterprise together to do the work that matters most.ABOUT THE TEAM The product security plays a vital role in identifying and mitigating risks within the Mural product as well as partnering with other engineering teams to recommend product features that enhance security for our customers. YOUR MISSION As an Application Security Engineer, your role will involve executing the MURAL product security strategy. You will manage Mural’s public bug bounty submissions, SAST testing within our CI workflow. Collaborating closely with developers, you will work to expand security testing coverage and lead security reviews of MURAL product features. Additionally, you will play a crucial role in educating and promoting secure coding best practices. WHAT YOU'LL DO Performing security reviews of Mural product features and architecture Manage and operate our bug bounty program Lead penetration testing and manage any risks to remediation Implementation and operation of SAST and DAST technologies in the CI workflow Working closely with Engineering teams to track and manage product risks to remediation Working closely with Engineering to increase coverage of security testing Communicating and nurturing relationships with security researchers, customers, and other stakeholders Producing metrics to help track the health of our product vulnerability management strategy Educating and evangelizing secure coding best practices WHAT YOU'LL BRING 5+ years experience in a product security focused role Experience with product security at a multi-tenant SaaS company preferred Experience with vulnerability management Deep understanding of web application and mobile application security risks Deep understanding of Linux, Networking, Cryptography, and Cloud Architecture fundamentals Software development experience with Node.JS or other frameworks like React, Angular, etc. is a preferred Familiarity with MongoDB, Node.JS, Ruby, and/or Python is preferred.  If you have participated in public or private Bug Bounty programs, or have any other open source or community contributions, presentations, or blog posts in the security space, please share it with us! Excellent command of English, both written and verbal For roles based in New York City, California, Colorado, and Washington, the base salary for this role ranges from $160,000 - $200,000 + benefits. Compensation offered will be determined by factors such as location, level, job-related knowledge, skills, and experience. Certain roles may be eligible for variable compensation.Equal Opportunity  We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.

Are you a skilled Frontend Engineer looking for a new and exciting opportunity in the Web3 space?Unlockit, a disruptive Web3 PropTech & GovTech company, is seeking a Mid Frontend Engineer to join the team and help revolutionize the Real Estate Market.As a Frontend Engineer, you will be responsible for building and maintaining the frontend systems. You will also have the opportunity to collaborate with multidisciplinary teams and ensure that the software developed is scalable and maintainable.What will you do: Prototype and implement web interfaces; Design and implement solutions that are scalable, maintainable and have high performance; Design and implement unit tests and E2E tests; Integrate and work with a multi-disciplinary remote team. What you should know: At least 2-3 years of E2E experience in product development, ideally with React; Solid knowledge of integrating FE applications with different APIs (REST, websockets, among others); How to lead a feature implementation and test; Knowledge of HTML5, CSS and Javascript; Good understanding of UX; Fluent in Portuguese and English. Personality-wise, you should be a dynamic person with good communication who loves technology and wants to make a big impact in a company starting to scale.Why Unlockit? Remote Work; Collaborative and forward-thinking environment; Join a team committed to excellence and innovation; Opportunities for growth and professional development. Don't miss out on the chance to be a part of the team that is reinventing the way Real Estate is transacted.Apply today!Recruitment process: 1st call with Hiire; Technical interview with the Technical Team; Cultural interview with Tiago Dias (CEO).

Applicant Privacy Notice Looking to join a world-class blockchain development team? Ava Labs makes it simple to deploy high-performance solutions for Web3, led by innovations on Avalanche. The company was founded by Cornell computer scientists, who partnered with Wall Street veterans and early Web3 leaders to execute a promising vision for redefining the way people build permissionless networks. Ava Labs is redefining the way people create value with Web3. Join us as we empower people to easily and freely digitize all the world’s assets on one open, programmable blockchain platform. We are looking for a Senior Front End Engineer to join the AvaCloud team. The AvaCloud team is responsible for simplifying the experience to launch, manage, and grow web3 applications on an Avalanche Subnet. This particular role will be responsible for creating a compelling front end with streamlined UX that makes it easy for users to deploy custom blockchains without the typical complexity of web3. The Senior Front End Engineer will work closely with a team of backend engineers, product designers, and product managers to deliver on the AvaCloud product vision. WHAT YOU WILL DO Design, build and deploy highly secure, scalable and maintainable client facing UI systems Provide expertise in building the most user friendly, visually appealing product User Interfaces Lead client feedback sessions & experimentation while acting as key UI stake holder for cross departmental projects Create developer libraries and SDKs Lead code reviews and A/B testing projects WHAT YOU WILL BRING BS or higher degree in Computer Science In depth knowledge of architectures, computer science principles and the latest UI/UX technologies 5+ years developing UI/UX focused products and applications Responsive and component based web apps JavaScript Typescript, React and/or VueJS HTML/CSS SDK development expertise A/B testing experience Salary Range: $143,200 to $178,800 (**This is not a guarantee of compensation or salary, a final offer amount may vary based on factors including but not limited to experience and geographic location.) #LI-Remote #LI-MM1 WHY AVA LABS? If you've ever thought about joining an early stage Web3 company - this is it! We're a global, world-class team of experts in computer science, economics, finance, marketing, and law with offices in New York City and Miami. We're highly passionate about Web3 and redefining the way people build and use finance and decentralized applications of all kinds. The company received early-stage funding from Andreessen Horowitz, Initialized Capital, and Polychain Capital, with angel investments from Balaji Srinivasan and Naval Ravikant. Join us and be a pioneer in a new technology that will have implications across a range of verticals such as finance, gaming, investing, collectibles, among many others. Ava Labs is committed to diversity in the workplace and we’re proud to be an Equal Opportunity Employer. We do not hire on basis of race, color, religion, creed, gender, national origin, citizenship, age, disability, veteran status, marital status, pregnancy, parental status, sex, gender expression or identity, sexual orientation, or any other basis protected by local, state or federal law. All employment is decided on the basis of qualifications, merit, and business need.

Join Seedify, the #1 Blockchain Gaming Launchpad and Incubation Ecosystem, at the forefront of driving innovation in the gaming, blockchain and Web3 industries. Our mission is to empower project developers and innovators through funding, community building, and a comprehensive support system. At Seedify, we are committed to shaping the future of gaming and blockchain technology.   Key Responsibilities: UI Development: Be a part of the development of user interfaces using React and NextJS. Ensure the implementation of responsive and adaptive design principles for optimal display across various devices. Collaboration with Design Teams: Work closely with UX/UI designers to translate visual concepts into functional online experiences. Integration with Backend Services: Collaborate with backend developers to integrate APIs. Code Quality and Standards Compliance: Maintain high code quality and ensure adherence to coding standards. Use linters and other tools to enforce code style and quality. Feedback Implementation: Address feedback from stakeholders, including product managers, designers, and users, to iteratively improve the product.   Requirements: Experience: 0-2 Years of experience working as a Frontend Engineer. Proficient in front end development: Expertise in HTML5, CSS3, JavaScript, and experience with React to lead the development and maintenance of front end services. This includes writing clean, efficient, and scalable code. Responsive and Mobile Design: Strong skills in creating responsive designs and understanding of mobile-first development principles. CSS Preprocessing: Knowledge of CSS pre-processors like SASS or LESS. Modern JavaScript Standards: Proficiency in ES6+ features and asynchronous programming models. API Integration: Experience with RESTful APIs.. Web3: Interest on Web3 ecosystem, wallets & transactions, IDOs & ICOs, DeFi (staking, farming, liquidity pools), omnichain. User-centric: Experience working on a user-centric product development environment.   Nice to have: NextJS knowledge Docker knowledge Willingness to learn Web3 ecosystem and blockchain. Bachelor’s degree in computer science or similar, or related education.   Team Structure: You will be an integral part of a multi-disciplinary product development team, alongside frontend / backend / test engineers, UI/UX designers, product owner and Web3 subject matter experts.   Company Culture: Fully remote, global operation. Agile work environment. Strong emphasis on user-centric development. Proud of the products we build, but always looking for improvements.   Career Development Opportunities: Opportunities for rapid growth and advancement into roles with more technical responsibility or management positions. Mentorship with senior members on the team to provide you with support, guidance, and growth   Location: 100% remote Timezone: flexible, but working hours must be in the range between 9AM and 10PM (UTC time).   Benefits: 21 days of holidays / year + local bank holidays. Sick days. Budget for training / courses. Budget towards purchasing work equipment such as laptop.   Salary: Monthly salary paid in stablecoins (USDC)

Spaceport is the leading IP and licensing platform for digital worlds. We’re capitalized and venture backed by some of the best crypto-native VCs, respected celebrities and largest studios in the world.We’re developing technologies that will expand what is possible on the blockchain, set new precedents in how digital content interacts with the real world and lead the march towards a decentralized metaverse future.Our rockstar team’s experience ranges from launching billion dollar gaming franchises like Bioshock and Saint’s Row to projects with celebrities like Seth Rogen and Method Man.If you are seeking a role at a well-funded company operating at the bleeding edge of technology, if you want to collaborate with the brightest minds and celebrities from around the world and if you want to build decentralized software that will be used by billions of people —you should apply for this job. What to expect You will work directly with the CEO and CTO on a daily basis. You will have the opportunity to wear many hats and directly contribute to our core products and help scale them to customers around the world. Job Responsibilities Architect, build, and maintain our customer facing and internal web apps Help lead architecture discussions, drive technical decisions, and foster best development practices Build powerful APIs that support third party developers Contributing to the end-to-end lifecycle of features, from concept to UI to deployment to metrics to support. Help with recruiting additional engineers to join the team Requirements Bachelor's degree in computer science or equivalent. Familiarity working with complex and data-intensive single page apps Experience with Typescript and frontend frameworks such as React, Vue3 Experience using Docker and CI/CD flows Experience with designing REST/GraphQL API's Database development experience using PostgreSQL Knowledge of modern tool chain used for developing high quality web applications Clear communication skills (written and oral) and an ability to work effectively with cross disciplinary teams Nice to Have Understanding of 3D graphics and mathematics Side projects you can showcase Types of people we’re looking for Builders - people who love building something new and seeing their work used, whether as a passion side project, in a startup, or within a larger corporation. Speedwalkers - people who get things done, who move with unusual urgency, who take pride in continual improvement and integrating feedback Owners - people who take responsibility for their decisions, document their processes and treat their work with a deep sense of pride Troublemakers - people who enjoy not just getting their hands dirty, but dream about what can be improved, new products that could be built, and new lines of business that we can disrupt Benefits Competitive pay and benefits Regular team off-sites and retreats Remote-first work environment, with optional in-person offices Work-from-home improvement stipend Coworking membership stipend Professional learning and development stipend Please reach out even if your experience doesn’t align with the job description precisely. We are looking for talented people to fill roles that may not already be posted and we can always explore options after starting the conversation. Reach out to us today!About the companySpaceport is a stealth startup building infrastructural fabric for metaverse worlds. We’re freshly capitalized and venture backed by some of the best crypto-native VCs, respected celebrities and largest studios in the world.

We're seeking a Senior Front End Software Engineer to contribute to the improvement and maintenance of the ICP Dashboard (dashboard.internetcomputer.org).  This is a tool developed by the DFINITY Foundation that provides real-time network insights into the Internet Computer and enables users to monitor and search for historical and current information. ResponsibilitiesResponsibilities: Implementing new or redesigning existing React components based on Figma designs, including improvements, bug fixes, and proactively implementing new features without specific designs. Perform thorough code reviews to identify issues and suggest improvements, ensuring high-quality code standards. Mentor other front-end developers, providing guidance and support to enhance team skills and productivity. Requirements: 5+ years of experience as a front end software engineer, with a proven track record of shipping products Expert knowledge of HTML, CSS/SCSS, and TypeScript, with a commitment to well-documented and clearly-commented code. Experience working with React or other modern MVC frameworks, and designing and implementing reusable and composable React components. Strong sense for design and UI/UX. Ability to code with multiple target form factors (mobile, tablet, desktop) in mind. Proficient in integrating web applications with RESTful APIs. Strong attention to detail, ensuring clean, organized, and maintainable code. The ability to effectively collaborate with coworkers across multiple time zones. Pluses include: Rust, Next.js, KendoReact, BEM (Block-Element-Modifier) CSS class naming Familiarity with cryptocurrency and blockchain technologies is a plus. A Bachelor’s degree in Computer Science, or a closely related field This is a remote role with much of the current team based in the US on EST, so preference for those that can work in overlapping timezones. About DFINITY and the Internet Computer:The Internet Computer is the fastest and only infinitely scalable general-purpose blockchain — incubated and launched by the DFINITY Foundation in May 2021. A team of over 200 world-renowned cryptographers, distributed systems engineers, and programming language experts have taken on the massive technological challenge of building, maintaining, and continuously improving a ‘world computer’ powerful enough to host Web3 dApps, DeFi, games, NFTs, social media, and metaverse projects. DFINITY was founded in 2016 by entrepreneur and crypto theoretician, Dominic Williams, and attracted interest and financial contributions from early members of the Ethereum community. Later, top-tier institutions such as Andreessen Horowitz, Polychain Capital, and SV Angel backed the Internet Computer in a collective effort to help build out Web3. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.