Bitcoin jobs in crypto and blockchain companies

Join Tether and Shape the Future of Digital FinanceAt Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction. Innovate with TetherTether Finance: Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.But that’s just the beginning:Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.Tether Data: Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.Tether Evolution: At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways. Why Join Us?Our team is a global talent powerhouse, working remotely from every corner of the world. If you’re passionate about making a mark in the fintech space, this is your opportunity to collaborate with some of the brightest minds, pushing boundaries and setting new standards. We’ve grown fast, stayed lean, and secured our place as a leader in the industry.If you have excellent English communication skills and are ready to contribute to the most innovative platform on the planet, Tether is the place for you.Are you ready to be part of the future? About the job Overview We're seeking an experienced Senior Systems Administrator to architect, deploy, and maintain mission-critical infrastructure for our Tether Data Division. The ideal candidate will combine deep technical expertise with a security-first mindset. A suitable candidate should be credible and exhibit Strong problem-solving and analytical abilitiesExperience managing mission-critical systems with 99.99% uptime requirementsExcellent documentation and communication skillsProven track record of incident management and resolutionAbility to work independently and as part of a global teamStrong security, threat detection and mitigation experience Responsabilities Design, implement, and maintain high-availability infrastructure solutions at scale with hundreds of serversOrchestrate deployments and updates across our infrastructureImplement and maintain robust monitoring, alerting, and incident response systemsCollaborate with development teams to optimize application performanceConduct internal security audits and implement hardening measuresProvide technical mentorship to junior team members 5+ years of hands-on experience with Linux systems administrationStrong expertise in:Infrastructure as Code (Terraform, Ansible)Container orchestration (Docker/Podman)GPU container optimization and managementVirtualization platforms (QEMU/KVM)Network architecture (VPN, SDN, Load Balancing)Security practices and infrastructure hardeningNodeJS application deployment and scalingMonitoring and observability tools (Prometheus, Grafana)CI/CD pipelines (Jenkins / GitLab / Github CI)Cloud platforms (AWS, GCP)Version control systems (Git)Usage of FIDO2 and Yubikeys for server administration

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. In the United States, we have a flexible hybrid work policy for employees who live within 30 miles of our office headquartered in New York City and our office in Seattle. Employees within the New York and Seattle metropolitan areas are expected to work from the designated office twice a week, unless there is a job-specific requirement to be in the office every workday. Employees outside of these areas are considered part of our remote-first workforce. We believe our hybrid approach for those near our NYC and Seattle offices increases productivity through more in-person collaboration where possible. The Department: Trust & Safety Trust & Safety at Gemini is a team dedicated to stopping bad actors, securing our user’s funds and ensuring the integrity of Gemini’s digital asset marketplace. We are a diverse group of technology and operational professionals who develop new approaches to solving classic problems using cutting edge tools and processes. The Role: Associate, Trust & Safety Gemini’s Trust & Safety team is looking for a fraud associate to contribute to Gemini’s efforts in preventing fraud. In this role, you will be responsible for investigating, responding to and ultimately preventing fraud on the Gemini platform, while ensuring our customers have a both secure and seamless experience. Gemini is looking for a passionate associate who will work directly with Gemini customers in order to investigate and resolve fraud and abuse. This includes assisting customers with scams, ATOs, onboarding issues, transaction errors, and timely account security escalations. Responsibilities: Respond to risk-related customer issues of varying levels of complexity, primarily via email. Investigate and review suspicious customers’ activities, including at Onboarding, and escalate to appropriate teams when necessary.  Identify trends and patterns in fraud activity and suggest rule and policy changes to assist with preventing fraud. Leverage expert business knowledge to identify process and strategy deficiencies, and provide recommendations for operational improvement. Prepare ad-hoc fraud reports regarding suspicious activity, incidents, and key measurements of the fraud program. Cross-functional collaboration: Coordinate with key stakeholders within Trust & Safety, Identity, Compliance, and Customer Support on fraud cases and to make operational improvements. Directly participate in and provide necessary support for special projects and initiatives as assigned. Minimum Qualifications: BA/BS in relevant field or commensurate years of experience. 1-3 years of financial Risk, Fraud, or Compliance Customer Support and investigations. Great verbal, written and communication skills.  Ability to think on your feet and maintain composure in difficult and complex situations. Comfortable with making decisions in ambiguity. Roll-up-the-sleeves, no-task-is-too-small-attitude - willingness to do what’s necessary to ensure the safety of our customers.  A healthy balance of empathy and skepticism, and the ability to question one’s own assumptions. This role may require an on call rotation. Preferred Qualifications: Familiarity or experience with relational databases and Business Intelligence tools (e.g. Tableau, Looker etc.) is a huge plus. Familiarity with database querying languages such as SQL. UK, Europe, India, and other region-specific fraud knowledge is a plus. This role may require an on call rotation. 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 $75,000 - $93,000 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-AH1

Parity is one of the world's most experienced core blockchain infrastructure companies, having built and pioneered some of the most advanced technologies in the blockchain sector. Parity was founded by Dr. Gavin Wood, co-founder and former CTO of Ethereum, the primary engineer behind the Ethereum Virtual Machine (EVM), inventor of the Solidity programming language, and primary author of the Ethereum Yellowpaper. Based in Berlin, London, and Lisbon, Parity has built clients for Ethereum, Bitcoin, and Zcash and has pioneered a completely new, next-generation blockchain protocol with Polkadot and the framework it’s built with, Substrate. Parity builds the open-source technologies needed to power an unstoppable, decentralised web—known as Web3—and helps developers and organisations implement and build upon the Web3 tech stack. With a remote-first, global team, Parity is building open-source technologies for developers and organisations to implement and build upon. Our Web3 tech stack includes Polkadot, Substrate, and Kusama. People in our collective are: Highly motivated to contribute to Parity’s mission and be part of something bigger Excited to work on projects that are groundbreaking and complex Autonomous workers that self-initiate, but also collaborate well with others Taking maximum accountability and having minimum ego at work Comfortable with chaos and adapting to the ever-changing Web3 space Continuously educating themselves about Parity and the wider ecosystem About the team: We are a small, curious, tight knit People Partner team working independently within a larger People team. We have had an exciting and transformative year setting up levelling within the organisation, revamping our compensation structure and implementing a performance review process. In 2025 we have similarly big plans and want to work on our learning & development offering, improving our onboarding & offboarding experience and making Parity a more inclusive space to work. About the position: Be a strategic partner and advisor to team leads on various people topics including employee relations, performance management, conflict resolution, compensation  Coach managers on applying best practices to drive performance and team development Own, collaborate and deliver people & culture projects such as onboarding, learning and development, and offboarding Support organisational change and engagement aligned with the company's strategic objectives. Optimise processes to improve internal team operations and the overall employee experience Collaborate with other support teams such as Finance, People Operations, Talent, Communications  and Operations About you: Excellent interpersonal and communication skills, with the ability to influence and build strong relationships at all levels. Excellent problem-solving skills  Ability to leverage data and metrics to drive data-based decision making. Experience working either as a people partner, people ops or a similar role within a people function Collaborative and motivated to work closely with other teams. Practical knowledge of employee labour laws in either one or more of these jurisdictions: Germany, UK, Switzerland or Portugal   About working for us: Competitive remuneration packages based on iterative market research, including tokens (where legally possible) “Future of work” environment that’s remote-first and self-initiating with flexible hours Team mates that are genuinely excited about their impact and projects Access to the brightest minds in this space to learn about Web3 and develop your skills and knowledge while on the job Becoming part of the wider ecosystem (career and networking opportunities) Team and company-wide retreats Work laptop   Those joining our collective as an employee in Germany, Portugal, and the U.K. also enjoy benefits such as health care, parental leave, PTO (28 days per year) and local team events Parity is an Equal Opportunity Employer. We welcome diversity in our global team and care about everyone in our collective feeling included and welcome.   View our Applicant Notice to see how we use your data. Is this position not quite your match? Browse our other open roles.

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. In the United States, we have a flexible hybrid work policy for employees who live within 30 miles of our office headquartered in New York City and our office in Seattle. Employees within the New York and Seattle metropolitan areas are expected to work from the designated office twice a week, unless there is a job-specific requirement to be in the office every workday. Employees outside of these areas are considered part of our remote-first workforce. We believe our hybrid approach for those near our NYC and Seattle offices increases productivity through more in-person collaboration where possible. The Department: People The People Team at Gemini is more than HR — We are thought partners, business influencers, and ambassadors for Gemini's company values. Our collaborative team is composed of recruiters, business partners, and people solution specialists. As a member of the People Team, you’ll be on the ground floor of a quickly growing organization, with the opportunity to create best-in-class processes and programs that find, grow, and retain amazing talent at Gemini. The Role: Lead, People Solutions We are searching for a Lead, People Solutions who will be responsible for providing senior level support within HR/People Operations, including the full employee life-cycle, but with a focus on owning the Global Mobility and Employer of Record programs. In addition to being a point of escalation for People Solutions cases, including but not limited to: onboarding, total rewards, performance management, off-boarding and audits, you will also be responsible for owning US/International immigration, relocation of existing employees and the engagement of a global workforce through Employer of Record vendors. In this role you will develop employee facing Global Mobility policies, build Standard Operating Procedures for a variety of People Solutions processes and also own complex HR cases through our Jira ticketing system. We’re looking for someone who is proactive, thoughtful and extremely organized for this critical role on our team. Responsibilities: Develop Global Mobility policies and processes that can support the needs of a high growth business Be the main point of contact for cross functional stakeholders such as IT, Security, Benefits, Senior Leaders and HRBPs in regards to specific employee immigration and relocation cases Own the relationship with our outside immigration counsel, relocation and employer of record vendors Take responsibility for employee experience during immigration/relocation cases, ensuring they are well informed and feel supported every step of the process. Deliver successful outcomes by building supplemental materials related to visa cases, such as job descriptions, letters of support, and RFE materials Support the execution of People Solutions programs and operations including, but not limited to: onboarding, total rewards, performance management, audits and offboarding Find appropriate resolution for escalated Jira tickets and queries from the People Solutions inbox, responding within SLAs Partner closely with cross functional stakeholders and the wider People Team to support employee lifecycle programs and tasks Build out and maintain Standard Operating Procedure, documenting processes and workflows via Confluence and gDrive, proactively identify improvements and adding automation wherever possible Take ownership of operational workflows in HR systems such as Workday and ensure data integrity by organizing and maintaining employee records Participate in people projects as determined by the needs of the organization with ability to lead and manage projects within scope and timeline Minimum Qualifications: 6+ years of experience in Human Resources and/or People Operations in a fast-paced, global organization 1+ years experience of owning Global Mobility tasks such as US/International Immigration and Relocations Experience serving as the primary point of contact between the employer, immigration attorneys, and sponsored candidates/employees End-to-end project management experience with US-specific visa cases for both candidates and employees, including: H-1B cap cases & transfers, E, TN, and Green Cards Experience owning the international relocations of existing employees, partnering closely with senior leadership and HRBPs to ensure the required business outcome and positive employee experience Experience of owning Employer of Record vendors such as DEEL or Atlas, supporting internal Managers and EOR employees with contracting and setting up new global locations Experience owning complex and sensitive HR programs and operations Highly proficient Workday user and experience using Jira, or equivalent ticketing system A strong sense of urgency and pride in your work Highly responsive to teammates and employees, with clear, concise communication Demonstrated judgment and ability to deal with confidential and sensitive matters effectively Ability to identify and provide recommendations for improvements; strong desire to enhance efficiency and automate whenever possible Excellent written and verbal communication skills; comfortable communicating with senior leaders and employees on sensitive issues Demonstrated ability as a good problem solver, understands how to effectively troubleshoot and considers the wider strategic business needs Passionate about good employees experience and strong ownership of employee issues Ability to work autonomously, asking questions to gain clarity, removing roadblocks to make progress, being resourceful in finding/learning information, and identifying different options of solutions Preferred Requirements: Bachelor’s Degree in business administration, human resources or related field SHRM-CP qualified Experience using tools such as Envoy, Greenhouse, Confluence, Slack, Lattice and Docusign 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 $122,000 - $152,000 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-MW1

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