Swift jobs in crypto and blockchain companies

Biconomy empowers Web3 developers to build seamless, user-friendly dApps that work effortlessly across multiple blockchains. Our battle-tested modular account and execution stack eliminates traditional UX friction points, helping projects accelerate user adoption while reducing development costs. By processing over 50 million transactions across the 300+ dApps we've served, we're powering the future of onchain economies.The Role: Innovating at the Intersection of AI and DeFiWe’re now building Nomy – an AI-powered crypto assistant that helps users intuitively interact with onchain operations, manage portfolios, and simplify the entire Web3 experience. As we bring this product to life, we’re looking for a Mobile Developer to join our AI team and lead the development of our mobile apps. This is a unique opportunity to build a product at the intersection of AI, crypto, and fintech, and craft seamless mobile experiences that abstract away the complexity of Web3 for everyday users.What Will You Be Doing?Design, develop, and maintain mobile applications for iOS and Android using React Native or native technologies (Swift/Kotlin).Collaborate closely with AI/ML engineers, backend developers, and product designers to bring Nomy’s features to life.Build sleek, performant, and secure mobile interfaces that simplify complex blockchain interactions.Integrate wallet functionality, real-time onchain data, and LLM-driven user interactions into a cohesive mobile experience.Ensure high code quality through testing, code reviews, and best practices.Own end-to-end mobile features – from prototyping and development to deployment and iteration.Continuously improve the user experience based on user feedback, analytics, and emerging best practices.Requirements:Must Have3+ years of experience building high-quality mobile applications in production.Proficient in React Native and/or native mobile development (Swift for iOS, Kotlin for Android).A strong eye for mobile UI/UX and attention to detail.Familiarity with mobile performance optimization and secure data handling.Experience working with APIs (REST, GraphQL) and state management libraries.Strong communication and collaboration skills in cross-functional teams.Self-starter mindset with the ability to thrive in a fast-paced, remote-first environment.Nice to HaveExperience integrating crypto wallets or Web3 SDKs (ethers.js, WalletConnect, etc).Exposure to AI-powered applications, especially LLM-based assistants or chat UIs.Understanding of blockchain fundamentals: EVM, smart contracts, gas fees, DeFi interactions.Previous work on fintech or security-sensitive mobile applications.What We Offer:Flexible Working Hours: Enjoy autonomy over your schedule.Generous Vacation Policy: 25 days vacation per year plus public holidaysCompetitive Salary: With regular performance reviews.Token Allocation: Be rewarded with tokens as part of our compensation package.Growth Opportunities: Be part of an exciting new project with significant career growth potential.Innovative Work Culture: Join a team that’s at the cutting edge of Web3, AI, and DeFi, and help shape the future of the digital economy.Fun and Engaging Team Activities: Game nights, virtual celebrations, and work retreats to keep things exciting.At Biconomy, we believe in creating a diverse and inclusive workplace. We are committed to being an equal-opportunity employer, and we do not discriminate based on race, national origin, gender, gender identity, sexual orientation, disability, veteran status, age, or any other legally protected status.

Echo Base is a private holding company pursuing special situation control investments in the digital assets space. Our global crypto team possesses deep experience in both the scaling of new ventures and the restructuring of complex assets with asymmetric risk profiles. Through lateral acquisitions, Echo Base seeks to leverage operational and technical synergies across our portfolio companies.The DevOps Principal Engineer is responsible for overseeing the strategy, architecture, and operations of Echo Base’s DevOps environment. This role requires deep expertise in cloud infrastructure, security protocols, and monitoring tools, alongside exceptional leadership skills to guide a high-performing team. The ideal candidate ensures reliability, scalability, and compliance for Echo Base’s cryptocurrency services while driving team collaboration and technical innovation.What will you do: Develop and execute a comprehensive DevOps strategy to ensure scalability, uptime, and security for Echo Base’s cryptocurrency platforms and services. Oversee the design, deployment, and optimization of AWS cloud infrastructure, ensuring high performance, cost efficiency, and alignment with cloud-native architectural best practices. Drive the adoption and implementation of observability tools like Splunk, Prometheus, and Grafana, enabling proactive monitoring, alerting, and rapid issue resolution. Build and manage automated workflows and event-driven systems using Apache Airflow and AWS Lambda to streamline operations and enhance system reliability. Implement robust data visualization and reporting solutions with Superset, delivering actionable insights for transaction metrics and operational KPIs. Conduct regular security audits, enforce compliance with cryptocurrency regulations, and implement data protection best practices to safeguard user and system integrity. Act as the primary escalation point for critical incidents, leading swift resolution efforts and driving improvements through comprehensive post-mortem reviews. Report key DevOps metrics, operational performance updates, and technical strategies to senior leadership, aligning team efforts with company goals. Who you are: Proven leader with expertise in cloud platforms, DevOps best practices, and AWS services. Skilled at fostering collaboration, mentoring team members, and resolving critical issues. Passionate about innovation and optimization in high-security, high-availability environments. What we are looking for: 7+ years of experience in DevOps, Cloud Engineering, or related fields, with 3+ years in leadership roles, demonstrating the ability to coordinate cross-functional teams, prioritize tasks, and manage escalations. Advanced expertise in AWS services, including EC2, S3, Elasticache, ECS, DynamoDB, Route 53, WAF, SNS, CloudWatch, and ELB, for designing and managing scalable, secure, and high-performance cloud architectures. Strong knowledge of DevOps best practices, including GitOps, CI/CD methodologies, and infrastructure-as-code tools such as Terraform and CloudFormation. Proficiency in workflow orchestration tools like Apache Airflow and event-driven architectures using Kafka and AWS Lambda. Expertise in monitoring and visualization tools, including Splunk, Prometheus, Grafana, and Apache Superset, to ensure comprehensive system visibility and actionable insights. In-depth knowledge of security protocols and tools, such as KMS, Certificate Manager, CloudTrail, and WAF, for safeguarding infrastructure and ensuring compliance. Familiarity with cryptocurrency-specific systems, including wallet security, transaction processing, and compliance standards, with an emphasis on adhering to global regulations. About the companyEcho Base is a private holding company formed for the purpose of pursuing special situation control investments in the digital assets space. Our global crypto team possesses deep experience in both the scaling of new ventures and the restructuring of complex assets with asymmetric risk profiles. Through lateral acquisitions, Echo Base seeks to leverage operational and technical synergies across our portfolio companies.

(Full-time; Remote, Preferably: European time zone)Welcome to Reown, the onchain UX platform.Previously known as “WalletConnect Inc”, Reown equips builders with the tools needed to create seamless, secure, and intuitive digital ownership experiences.Since its beginnings as a simple QR code in 2018, the WalletConnect Network has grown into a comprehensive ecosystem, serving over 6,000 apps, 600+ wallets, and 15+ million users.Reown offers cutting-edge toolkits like AppKit and WalletKit, designed to enhance web3 interactions. AppKit enables smooth wallet integrations, login options, and on-chain transactions, while WalletKit focuses on securing and simplifying wallet connections to thousands of apps, supporting both EVM and non-EVM blockchains.Backed by $25 million in funding from some of the world’s best crypto and infrastructure investors such as Union Square Ventures, 1kx, Shopify, Coinbase Ventures, Circle Ventures, and Uniswap Labs Ventures, Reown is a global, remote-first team that values openness, simplicity, innovation, and ownership.The Role:Reown is seeking a meticulous and experienced Quality Assurance Tester to uphold and elevate the quality of our products. As our first dedicated QA hire, you’ll have the unique opportunity to define and shape our approach to quality, complementing our existing automated testing framework. If you’re driven by a passion for excellence, thrive in collaboration, and are eager to play a critical role in delivering seamless on-chain user experiences, we want to hear from you. Responsibilities:UI Testing & Validation: Perform thorough, hands-on testing of UI workflows and screens that are not covered by automated tests. Create test plans to ensure that all aspects of the product meet testing expectations Identify, document, and track bugs, ensuring detailed and reproducible steps for engineers to resolve issues efficiently. Collaborate with product managers, designers, and engineers to understand requirements, user flows, and expected outcomes for features and fixes. Release Gating Act as the "key approver" for pull requests (PRs) being merged, ensuring only high-quality deliverables progress to production. Validate that features meet design specifications and function flawlessly across various browsers and devices. Ensure that the appropriate test coverage has been added for new code or a fixed issue whenever possible. Bug Management & Organization Help maintain organization in Linear, properly labeling, categorizing, and prioritizing bugs. Work with the team to refine processes for bug triaging and resolution. Quality Practice Development Advocate for and implement best practices around quality assurance across the organization. Drive the development of robust testing practices and workflows to improve overall product reliability. Quality Metric & Reporting Define and track quality metrics to provide actionable insights into the organization’s testing and development processes. Regularly report on the state of quality across teams and recommend areas for improvement. RequirementsMust-Have: 3+ years of hands-on experience in quality assurance, testing, or a similar role. Strong understanding of blockchain technology, cryptocurrency wallets, and the mechanics of on-chain transactions. Exceptional attention to detail, with a keen eye for spotting inconsistencies or bugs. Entrepreneurial mindset - willingness to do whatever it takes to get the job done. Experience testing user interfaces, workflows, and end-to-end user journeys on both web and mobile. Strong communication skills, with the ability to work effectively with cross-functional teams. Familiarity with tools like Linear, Jira, or similar issue-tracking systems (we use Linear). Nice-to-Have: You’ve used Reown / WalletConnect tools Familiarity with Agile development methodologies. Proficiency in reporting and defining quality metrics to monitor product health. In-depth knowledge of user experience principles and best practices, with a track record of delivering intuitive and user-friendly products. Ability to write/improve automated tests for the web in JavaScript and optionally in other platforms e.g. React Native/Flutter/Swift/Kotlin Benefits Fully remote position with a budget for your home office or work environment Regular team offsites to amazing places around the world Opportunities to travel to conferences and community events Generous PTO and parental leave Meaningful Learning and Development budget Competitive compensation package including salary & equity If you’re in the US, we’ll also cover your healthcare The chance to build and grow with one of the most recognized companies in Web3 and have fun while we do it Reown is an equal opportunity employer and we encourage applications from candidates of all backgrounds and experiences. We celebrate diversity and are committed to creating an inclusive environment for all employees.About the companyWelcome to Reown, the onchain UX platform. Previously known as “WalletConnect Inc”, Reown equips builders with the tools needed to create seamless, secure, and intuitive digital ownership experiences.

About the Company Gemini is a global crypto and Web3 platform founded by Tyler Winklevoss and Cameron Winklevoss in 2014. Gemini offers a wide range of crypto products and services for individuals and institutions in over 70 countries. Crypto is about giving you greater choice, independence, and opportunity. We are here to help you on your journey. We build crypto products that are simple, elegant, and secure. Whether you are an individual or an institution, we help you buy, sell, and store your bitcoin and cryptocurrency.  At Gemini, our mission is to unlock the next era of financial, creative, and personal freedom. The Department:  Platform Our Platform Organization’s purpose is to enable Gemini to scale effectively and empower our engineering teams to focus on building innovative financial products and experiences for individuals around the world. Within Platform, the Enterprise Infrastructure team oversees the internal corporate technology that supports Gemini’s offices and employees, including hardware and software management, cloud resources, developer tools, service and user account lifecycles, and operations of our global physical locations. Our enterprise technology strategy fuels business growth through an engineering-first approach by delivering a modern, secure, and scalable foundation for seamless collaboration, efficient operations, and future-ready innovation. This vision redefines IT as a strategic driver of innovation and acceleration, rather than a support function. By emphasizing operational excellence, continuous improvement, user enablement, and strategic automation, we transform IT into a catalyst for growth and innovation. The Role: Senior Enterprise Infrastructure Engineer As an Enterprise Infrastructure Engineer focused on engineering and automation, you will build and maintain the internal technology ecosystem that underpins Gemini’s global operations. While your responsibilities may include acting as an escalation point for complex issues originating from our support team, your primary focus will be on applying DevOps methodologies, automating repetitive tasks, and engineering innovative solutions to manage and scale our infrastructure. You will design and refine our internal tooling, develop integrations span across multiple web services, and leverage Infrastructure as Code (IaC) principles to enhance system reliability and efficiency. Your efforts will target the reduction of manual toil, ensuring that systems are stable, secure, and positioned for rapid growth. This role offers an opportunity to shape the future of our IT infrastructure by building, configuring, and evolving the platforms that keep Gemini operating smoothly and securely. The ideal candidate will thrive in the fast-paced setting of a growing organization and enjoy the variety of work that this position offers. Responsibilities: Build, maintain, and improve our internal infrastructure using DevOps methodologies, including Infrastructure as Code (e.g., Terraform) and Configuration Management tools (e.g., Ansible, SaltStack). Integrate and automate workflows across various SaaS platforms, utilizing REST APIs, OAuth flows, and scripting to eliminate repetitive manual tasks and improve system reliability. Design and implement CI/CD pipelines (e.g., GitHub Actions, Concourse CI) to ensure smooth, automated deployments and consistent application of infrastructure changes. Develop internal tools, custom scripts, and services (e.g., in Go, Python, Swift) to manage, monitor, and scale our global device fleet, including macOS and ChromeOS devices managed via MDM solutions (Jamf, Google MDM) and, where needed, Windows endpoints. Collaborate closely with the support-focused team members, serving as the escalation point for complex technical challenges, and implement automated solutions to reduce future support burdens. Engineer and maintain integrations with AWS services (e.g., EC2, S3, Cloudfront, CloudWatch) to ensure efficient, scalable, and secure cloud operations. Evaluate and adopt emerging technologies (e.g., Containerization: EKS) to further enhance system performance, resiliency, and security. Support identity management and user lifecycle tasks through Okta, Google Workspace, Active Directory, and other related IAM systems, working to automate user management at scale. Develop and maintain technical documentation, FAQs, and runbooks to ensure knowledge sharing and empower team members with clarity and confidence. Partner with cross-functional teams to identify operational pain points, drive continuous improvement initiatives, and advance Gemini’s overall technology ecosystem. Minimum Qualifications: Bachelor’s degree in a technical field or 4-8 years of experience in a DevOps-focused IT/infrastructure role. Strong experience managing macOS endpoints, including MDM platforms such as Jamf and Google MDM, and familiarity with Linux principles (systemd, shell scripting). Demonstrated experience with Infrastructure as Code tools (e.g., Terraform), and configuration management (e.g., Ansible, Puppet, Salt). Strong understanding of AWS services, networking fundamentals (TCP/IP, DNS, DHCP, Wi-Fi, VPN), and cloud-native operations. Solid CI/CD pipeline experience (GitHub Actions, Concourse, Harness) and version control with Git/GitHub. Proficiency in scripting and programming languages (e.g., Python, Go, Swift) and working with REST APIs. Understanding of identity and access management technologies (Okta, Google Workspace) and authentication protocols (OAuth). Detail-oriented and capable of juggling multiple priorities in a dynamic environment. Excellent communication and documentation skills, with the ability to explain technical concepts to both engineering and non-engineering audiences. Proactive self-starter who can identify, plan, and implement solutions with minimal guidance. Preferred Qualifications: Experience in a startup, fintech or finance support. Understanding of SSO implementations (i.e. Okta). Experience with Linux. Strong experience with macOS. Experience managing 2500+ devices through MDM. Experience managing 1000+ user accounts. Experience with Go, Python, and Swift. Experience with Configuration Management (Ansible, Chef, Puppet or Salt). Experience creating and maintaining CI/CD pipelines. Understanding of Google Workspace management and products. Working knowledge of the Apple MDM protocol. Familiarity with AutoPKG, Munki, and other automated patch management or package distribution tools for macOS. Strong communication, teaching, and mentorship skills to elevate the capabilities of the entire team. It Pays to Work Here   The compensation & benefits package for this role includes: Competitive starting salary A discretionary annual bonus Long-term incentive in the form of a new hire equity grant Comprehensive health plans 401K with company matching Paid Parental Leave Flexible time off Salary Range: The base salary range for this role is between $136,000 - $170,000 in the State of New York, the State of California and the State of Washington. This range is not inclusive of our discretionary bonus or equity package. When determining a candidate’s compensation, we consider a number of factors including skillset, experience, job scope, and current market data. At Gemini, we strive to build diverse teams that reflect the people we want to empower through our products, and we are committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, or Veteran status. Equal Opportunity is the Law, and Gemini is proud to be an equal opportunity workplace. If you have a specific need that requires accommodation, please let a member of the People Team know. #LI-JS3

  Why Entersekt   Founded over 16 years ago, with more recent investments from Accel-KKR, Entersekt is a leader in mobile authentication, mobile app security, and payments enablement technology, offering highly scalable products with a track record of success across multiple continents.   Entersekt enables secure digital transactions for leading financial institutions globally. We exist to create a world where everyone can transact digitally without fear or compromise. Currently, we protect the digital transactions of over 210 million active users on our platform and hold 120 active patents that recognize innovation in digital security, payments, and user experience. Entersekt offers their customers secure authentication and digital payments experiences that remove unnecessary friction. Entersekt has invested in, and created, a diverse product portfolio that positions the company well to execute on its expansion in North America and European markets.The Ideal Candidate We are looking for a mobile software engineer with an interest in research and development (R&D), excited about working on early-stage prototypes and proof-of-concept projects. This role sits within the Signal Collection team in the Advice & Intelligence POD, where creativity, experimentation, and problem-solving are essential. This team plays a crucial role in developing prototypes and evaluating new technologies that can advance Entersekt’s offerings. As a mobile engineer in this team, you’ll be responsible for designing, building, and iterating on mobile-centric solutions that leverage iOS, Android, and full-stack technologies. Your contributions will help shape the future direction of the company’s products and technical capabilities. The Role As part of the Signal Collection team, you’ll be responsible for developing mobile prototypes and POCs that push the boundaries of what's possible in the digital security landscape. Working closely with R&D peers, you’ll contribute to full-stack projects involving iOS, Android, and TypeScript-based back-end systems. Specific tools and technologies aren’t prescribed, so you’ll need to be adaptable and comfortable experimenting with a wide range of development environments. You’ll help conceptualize and build technical prototypes, gather feedback from stakeholders, and iterate rapidly to refine your solutions. You’ll also be expected to take ownership of research into cutting-edge mobile technologies and evaluate their potential application in Entersekt’s core business. Responsibilities Prototype Development: Design and implement mobile-centric POCs and prototypes across Android, iOS, and web-based environments. Collaboration: Work closely with cross-functional R&D teams to brainstorm, design, and develop innovative solutions that align with Entersekt’s strategic goals. Technology Research: Research and evaluate emerging technologies and frameworks that could enhance mobile and full-stack development. Full-stack Contribution: Contribute to backend development using TypeScript-based systems, and web development as needed for holistic solution building. Architectural Input: Participate in architectural discussions, providing insights on mobile engineering, security, and best practices. Iterative Development: Take rapid feedback from stakeholders and team members to iteratively improve POCs and prototypes. Skills and Experience Successful candidates for this role will generally possess the following qualifications and skills: 3+ years of experience in mobile development with proficiency in Java, Kotlin, Swift, or Objective-C. Full-stack development experience, with knowledge of TypeScript (Node.js) back-end systems and web technologies like Angular, React, or Vue. Experience with building POCs and prototypes, with a willingness to work in a fast-paced R&D environment. Strong understanding of mobile development frameworks (iOS and Android). Solid understanding of object-oriented (OO) design patterns, SOLID principles, and software design fundamentals. Exposure to Agile practices like Scrum or Kanban. Familiarity with mobile security best practices and secure coding techniques. Experience with RESTful API design and integration. Experience with hybrid mobile development frameworks (e.g., Cordova, Ionic). Knowledge of mobile SDK API design and development. Experience with Docker, Kubernetes, and containerization within a mobile environment. Understanding of cryptography and public key infrastructure (PKI) is advantageous. Personality Attributes A strong interest in innovative development, and the ability to see projects from concept to completion. Creative problem-solving: ability to think outside the box and develop unconventional solutions. Eager to learn, with a passion for experimenting with new tools and frameworks. Self-driven and able to work independently, but also a great collaborator who thrives in team settings. A love for building: hands-on, excited about creating and refining technical solutions through iteration. Strong communication skills: able to articulate complex ideas clearly and concisely.   We place a lot of value on how we treat prospective employees and appreciate the time and effort that goes into job hunting. That is why we aim to keep the hiring process as quick and seamless as possible while ensuring the best possible fit for both you and the company. Working at Entersekt is truly a dream. You get exposed to cutting-edge technology, colleagues who are leaders in their fields, and an awesome working environment that includes flexible hours, remote work, and plenty of growth opportunities. Apply for this position by following the "apply now" tab and or viewing our other roles at Entersekt Careers page.    

Join us at Dapper as a Senior Mobile Engineer, iOS, where we focus on the intersection of blockchain and gaming. Our flagship projects, including Disney Pinnacle, NBA Top Shot, and NFL All Day, are blockchain-based digital collectibles platforms that leverage sophisticated technology. You will play a pivotal role in a dynamic, fast-paced environment, continually deploying to an enthusiastic and global audience, helping to pioneer new territories in blockchain and entertainment. We are looking for product-minded, user experience-driven Senior Mobile Engineer, iOS to join the fast-growing mighty mobile engineering team to ideate, design, implement, and maintain the best blockchain-powered mobile experiences for the first 1-billion mainstream users.What we’ll achieve together:Create and refine high-performance mobile applications running on blockchainPut our users first and ship features that surprise and delightContribute to the ideation, technical design, implementation, and testing of product featuresCraft every interaction with our product to be a polished, memorable, and engaging experienceEvaluate technical trade-offs for every decisionAdopt best practices in software development and refine our workflowsIdentify areas in our technical stack to improve, prioritize rollout with the team and contribute to the implementationBuild reusable components that are easy to use, maintain, and extendAbout you: BS/BA degree in a technical field such as Computer Science or equivalent years of experienceSolid understanding of Swift/Objective-C internalsProficiency with multithreading and performance optimization techniques for iOSStrong CS fundamentals (algorithms and data structures) and problem-solving skillsKnowledge of software design patterns and iOS best practicesExperience working on consumer-facing mobile productsShip high-quality code in a fast-paced environmentOwned projects end-to-end and delivered them by hitting key milestonesFamiliar with Apple Human Interface GuidelinesHave a strong product sense and eye for pixel-perfect implementationHave great communication skills; you work well with others to make the product better every day Bonus:Experience with Kotlin MultiplatformExperience with GraphQLExperience with blockchain and web3 technologiesExperience with OpenGL or MetalExperience with SDK developmentExperience with popular mobile third party libraries like Firebase, Customer.io, and InstabugDapper Labs is the world's first blockchain entertainment company. We are the creators of industry-leading experiences including CryptoKitties, NBA Top Shot, NFL All Day, Disney Pinnacle as well as Dapper Wallet – the simplest way to manage your assets and use the blockchain. We are also the original developers behind Flow, a new decentralized blockchain designed from the ground up for scalability and ease of use.Our mission at Dapper Labs is to make the world a more accessible and enjoyable place through consumer adoption of decentralized technologies.We have raised over $600M from leading and notable investors including Andreessen Horowitz, Coatue, Union Square Ventures, Venrock, Google Ventures (GV), Samsung, and the founders of Dreamworks, Reddit, Coinbase, Zynga, and AngelList, among others. Visit our website to learn even more about Dapper Labs, including information about benefits and perks.