C jobs in crypto and blockchain companies

About the Company:  Shardeum is building a layer 1, EVM-based, linearly scalable, smart contract platform that provides low gas fees forever while maintaining true decentralization and solid security through dynamic state sharding. Shardeum aims to be a chain capable of onboarding over a billion people to the crypto revolution, while also democratizing accessibility to decentralization. Shardeum’s mission is supported by prominent Venture Capitalists in the blockchain space, and we are on track to become one of the most widely used and well known smart contract platforms in blockchain history.We encourage you to browse our website, Whitepaper, Discord and YouTube channel to learn more about the project. You can even try downloading our validator software and joining our Testnet. We encourage people of all backgrounds to apply. Your talent and potential is what matters most to us. Shardeum is committed to creating an inclusive culture.About The Role: The Engineering team at Shardeum is responsible for delivering the Shardeum Mainnet, and developing the smart contract platform, the consensus layer and the protocol layer. We focus on building scalable, performant, secure and reliable software that can be downloaded by thousands of node operators to actualize the Shardeum network. In this position, you’ll have the opportunity to share and cultivate your ideas while innovating to enhance testing methodologies and various components of the Shardeum platform.  We tackle unique challenges that are yet to be addressed, making this role both exciting and rewarding. If you're eager to contribute to a project that holds significance in the global Web3 landscape, check out the details below: What You'll Be Doing: Own and manage the entire QA function and team, consisting of QA Testers and automation engineers. Develop and implement comprehensive QA strategies to ensure the quality of Shardeum’s decentralized platform. Design, develop, and maintain automated testing frameworks and suites. Conduct manual testing as needed, including: white box, integration, system and regression testing. Collaborate closely with development teams to integrate testing into the development workflow. Identify, document, and track bugs and issues until they are resolved. Perform regular reviews and audits of QA processes and standards. Participate in daily and weekly stand-ups, sprint planning and retrospectives with cross-functional teams, including development, product management, and operations, to maintain quality throughout the software development lifecycle. Stay updated on the latest industry trends and technologies to keep Shardeum’s QA practices at the forefront. What We're Looking For: 10+ years of experience in Quality Assurance, including 3+ years in a managerial role. Extensive knowledge of QA methodologies, tools, and processes. Proficiency in creating and managing automated test scripts using automation tools. Extensive experience with manual testing, and meticulous in ensuring comprehensive feature coverage. You excel in problem-solving and debugging. Experienced in Agile/Scrum methodologies. A solid understanding of the software development lifecycle and the role of QA within it. You demonstrate strong leadership, ownership and management skills. Strong communication skills - both verbal and written. We'd Love If You Have: Experience in the blockchain or decentralized applications space. You possess experience in programming languages like Node.js, Typescript or Rust. You’ve made contributions to open-source projects in the areas of QA and/or testing. You have a strong interest in Blockchain, Web3, AI, or Distributed Networks. Experience with consensus protocols and other blockchains Experience running a node in a blockchain network Familiarity with the Shardeum open source repos  Read the Bitcoin and Ethereum whitepapers We are building the infrastructure for Web 3.0. It's going to be a rollercoaster ride but promises to be fun.

We are seeking a highly communicative and project-oriented Executive Assistant to join our People & Culture team. You will be reporting directly to a C-Level, helping with the office management, people projects, and assisting the team based in the country, working in a dynamic environment, being the first point of contact for those matters, and with the possibility of developing a career in a growing company.Role and responsibilities: Office Management, oversee the day-to-day operations of our office such as the management of the workstation, IT equipment and coordinating the communication at the office US HR Administrative topics: Coordinate with the People team for onboarding new employees, recruitment, and other people-related initiatives. Events and team building organization: Assist with coordinating and executing company events including on-site, team building, and in-person meetings Coordinate the team with the C-Level of the country, assisting with benchmarking, and helping with global communication on our internal channels. Define and drive strategic priorities across the organization together with and under the guidance of our leadership team and departmental heads. RequirementsBackground and experience You have between 3 and 6 years working as a Chief of staff, HR assistant, or Executive Assistant Experience in the Finance, Crypto, or Banking sector is a plus You are used to working in a fast-paced environment where you developed flexibility and adaptability You are in the EST timezone Skills and personality Organized and autonomous Ability in written and verbal communication skills in a fast-paced environment. Communicative and easygoing.  Project Management and event management. Professional proficiency in English. Benefits🌍 International environment (English is the main language)🏥 100% Deel health coverage 💻 Top of the range equipment: Macbook, keyboard, laptop stand, 4K monitor & headphones🎉 Team events and offsites🔜 Coming soon: gym memberships, international mobility & lot of other cool benefits!Recruitment Process👀 Are you interested in this job but feel you haven't ticked all the boxes? Don't hesitate to apply and tell us in the cover letter section why we should meet!📝 Here's what you can expect if you apply: HR call (30') Technical Interview (45') Technical Assessment (50') Cultural Interview with (30') and the CEO of the Country (30') On the agenda: discussions rather than trick questions! These moments of exchange will allow you to understand how Flowdesk works and its values. But they are also (and above all) an opportunity for you to present your career path and your expectations for your next job!About the companyFlowdesk is the leading technology provider in Market-Making as a Service (MMaaS). MMaaS offers a new approach to managing liquidity on secondary markets where crypto projects can bootstrap their own liquidity using Flowdesk’s trading infrastructure and global coverage team.Flowdesk was founded in 2020 and is based in Paris with offices in Singapore, NYC, Toronto and now London. In four years, Flowdesk managed to grow rapidly due to the scalability of its infrastructure and business model which is subscription based and market/counterparty risk agnostic.Following a strong execution year in 2021, Flowdesk announced a $30m Series A in June 2021, followed by a $50m Series B in January 2024. The team is composed of 130 individuals, primarily with engineering/scientific and traditional finance backgrounds.Flowdesk’s ambition is to become the market leader in infrastructure provision for trading and financial services in crypto. We have a strong conviction that the next wave of tokenization will significantly increase the amount of tokens and exponentially the number of market-making streams, which requires a radically new scalable approach to market-making. To fulfill this vision, Flowdesk is at the forefront of compliance for regulated assets with a DASP registration in France and pending regulatory approval in other jurisdictions.

Jito Labs is architecting the future of high-performance distributed systems on Solana. We're the team behind Jito-Solana, the leading MEV Solana client, and the Jito Block Engine, which has revolutionized block building on Solana. Today, Jito-Solana currently runs on 88% of stake and 1,100 validators, producing an additional $370M of revenue for stakers and validators on the network.At Jito Labs, you'll work alongside a small, nimble group of engineers and operators who are passionate about solving complex technical challenges at the cutting edge of Solana trading and infrastructure. As a small, profitable company with product-market-fit, we're in a unique position to tackle ambitious technical challenges while maintaining our startup speed. Our team culture emphasizes:- High ownership: Every team member drives significant technical decisions and shapes our product roadmap.- Fast execution: We ship rapidly and iterate based on real-world feedback. Progress, not motion.- Technical excellence: We tackle complex problems with elegant, scalable solutions.- Sustainable growth: Strong financials and proven market fit enable us to focus on long-term impact.If you're excited about:- Solving complex distributed systems challenges- Working with cutting-edge MEV and trading infrastructure- Contributing to open-source blockchain technology- Making a tangible impact on one of the fastest-growing L1 blockchains...then we want to hear from you. We're not just building tools - we're architecting the future of high-performance distributed systems. Our work directly impacts Solana's ecosystem, enabling a faster network, better capital efficiency, and more robust DeFi applications for millions of users.We offer competitive compensation, significant equity, and the opportunity to work on problems that matter. Don't just watch the future of blockchain unfold—help us build it.About the Position:Jito Labs is seeking a Protocol Engineer to build the future of decentralized finance on Solana. We are looking for creative and motivated engineers that can effectively wrangle problems with large design spaces and come up with simple and elegant solutions. The role is extremely dynamic and a place where low-level problem solvers will thrive. You will be building protocols that have the potential to custody billions of dollars of capital; if this excites, you please apply!ResponsibilitiesArchitect Solana programs using Solana native and Anchor programming modelsBuild safe, secure, and performant codeWrite public-facing test plans and documentation for the code you’ve producedBuild substantial testing infrastructure to ensure code is following a defined specificationCollaborate with the team and customers to leverage internal knowledge and toolingDrive features and products from beginning to end with extreme ownershipComfortably dive deep into performance bottlenecks and debug problems across the entire stackQualifications5+ years of systems programming experience writing code in Rust, C, or C++Multiple Solana programs written in Solana native programming or using the Anchor frameworkExcellent communication and collaboration skillsExperience wrangling complex problems into simple solutionsWorked at a <50 person startupNice to-HaveSecurity backgroundKnowledge of DeFi landscape

The RoleAs a Core Engineer at Solforge, you will spearhead our engineering efforts, driving the innovation and implementation of next-generation high-performance distributed systems. You will work with a highly proficient team of core engineers who have all contributed to foundational and novel network components.We believe in hiring only exceptional individuals who are highly motivated to work on complex core infrastructure challenges and are motivated by a coherent system design philosophy that will drive our industry forward. Expect frequent group discussions on architecture, new design specs and code reviews. We are all deeply committed to frequently shipping quality code.About SolforgeSolforge is reimagining Solana's consensus ecosystem by developing software directly connecting validators with purpose-built execution environments. We're building institutional-grade infrastructure that delivers unprecedented performance, guaranteed transaction inclusion, and deterministic settlement for the next generation of internet-native applications. We unlock radical bandwidth and latency improvements by shifting Solana’s focus to state verification. About the Engineering TeamAs a team, we are building an entire platform written in Rus, which connects the L1 and L2s and allows us to create deeply complex scenarios and interactions with the running network. While your primary focus for this role is Rust and complex interactions with different components, you will likely also be involved in infrastructure (e.g., k8s), script writing, and supporting projects in other languages (e.g., Go). Working at every level of the stack is necessary to understand the big picture and how everything is wired together.ResponsibilitiesHighly motivated to contribute to our mission and be part of something bigger. Excited to work on projects that are ground-breaking and complexRefactor, improve and lead software design implementationCommunicate effectively with the team and document your code. It is also expected that founding engineers mentor less experienced engineers.Read and understand protocol specifications and be able to break them into issues and turn them into Rust code.Maintaining a large codebase with many components and keeping it well-designed, future-proofed, modular and highly performantAutomate security testing processes and benchmarks, creating innovative tools and frameworks for continuously improving our systems.What You'll Bring:A bachelor's or master's degree in Computer Science, Engineering, or a related technical field, coupled with practical experience in blockchain systems.At least 3 years of experience in distributed systems, with a deep technical understanding of L1 and L2 architectures.Strong proficiency in one of the following programming languages, such as Rust, C, C++ and GoStrongly emphasising writing performant and secure code.Demonstrated experience in designing, developing, and deploying scalable distributed systems.An analytical mindset with the ability to anticipate and mitigate emerging security threats, leveraging a comprehensive understanding of the blockchain landscape.Preferred QualificationsActive open-source contributions in core protocol engineering (such as Firedancer, Reth, Lighthouse, Geth, …).Direct involvement in the Solana ecosystem, with contributions to Solana's runtime, scheduler, or other core systems.Experience writing Solana Program Library (SPL) and Anchor or similar frameworks Active engagement with the blockchain security research community, evidenced by contributions to open-source projects, publications, or presentations at notable conferences.BenefitsCompetitive remuneration packages based on iterative market research, including tokensRemote-first and self-initiating with flexible hoursWork with team players who are genuinely excited about their impact and projects.A dynamic and collaborative work environment that fosters innovation and recognises individual contributions to collective successOpportunities for professional growth and advancement within a rapidly growing technological frontier

Argus Labs is building the next generation of massively multiplayer online (MMO) games by empowering players with the extensive freedom to build, extend, and influence the game worlds they inhabit. Our approach is centered around World Engine, our state-of-the-art onchain game server framework.World Engine leverages a novel sharded rollup blockchain architecture, which allows games to use smart contracts for user-generated content (UGC) while scaling to tens of thousands of concurrent users without compromising performance. To date, World Engine is the most performant blockchain designed from the ground up for games and has been used in production for games like Dark Frontier, processing 700K+ player transactions within a week.Backed by the bestWe raised $10 million in seed funding led by Haun Ventures ($1.5B crypto fund led by former a16z GP, Katie Haun) with participation from influential angel investors in tech and gaming such as Elad Gil and Balaji Srinivasan (ex-Coinbase CTO).Learn about who we are and our technologyhttps://argus.gghttps://world.devhttps://twitter.com/ArgusLabs_Key Responsibilities:Lead and mentor technical artists, ensuring high-quality, high-performance deliverables.Collaborate with art and engineering teams to optimize workflows, game performance, and resolve technical challenges.Design tools to streamline artist workflows, enhance efficiency, and support multi-platform asset creation.Optimize assets to meet texture, polygon, and memory requirements for performance goals.Develop shaders and visual effects that balance visual quality with performance.Provide technical guidance on asset creation, rigging, and animation to support pipeline integrity.Prototype and troubleshoot visual features for new mechanics, integrating assets with engineering support.Research and implement new technologies to enhance the art and animation pipeline.Document tools, workflows, and processes for consistent project alignment.Requirements:Proven experience as a Technical Artist in the gaming industry, with at least 3+ years in a lead or senior role.Proficiency in 3D art tools such as Maya, Blender, 3ds Max, and game engines like Unity or Unreal Engine.Strong knowledge of shader development, rendering pipelines, and performance optimization for multiple platforms.Experience with scripting/programming languages (e.g., Python, MEL, C#) to develop tools and automate workflows.Excellent problem-solving skills and the ability to troubleshoot and address technical challenges efficiently.Leadership skills with a proven track record of mentoring and guiding a team of technical artists.Perks & benefitsFor full-time employeesA note for the game industry veterans: no crunch :-)Flexible PTO (2 weeks required) + holidays100% employer-covered medical, dental, and vision insurance (US)401k (US)Up to $1500 desk set-up stipendCompany retreatsWe’re an equal-opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran, or disability status.

Chief Revenue Officer The Chief Revenue Officer (CRO) will be the architect and leader of Flipside's revenue strategy and execution, orchestrating our next phase of growth across sales, marketing, and service delivery. This executive role demands a unique blend of analytical precision and strategic vision to transform our data-driven insights into sustained revenue expansion. Flipside orchestrates blockchain growth through a powerful mix of data, science, and community. We drive measurable market cap growth for blockchain ecosystems, empower analysts with industry-leading data, and empower anyone to earn tokens by shaping the onchain economy. At the heart of our approach is a proprietary wallet scoring methodology that transforms raw onchain data into actionable growth strategies. This highly quantitative framework drives meaningful ecosystem awareness, acquisition, and activation—and has catalyzed billions in value creation for Flipside partners like Solana, Avalanche, NEAR, Aptos, and more. Founded in 2017 and backed by leading investors like Republic, Galaxy, and True Ventures, Flipside is a remote-first company with a global team of nearly 100. With an energetic community of 180,000 analysts, and dozens of top-tier blockchain partners, growth knows no bounds at Flipside. Primary Responsibilities: Lead and scale Flipside's revenue teams, with direct oversight of sales, marketing, and growth services departments to achieve ambitious top-line growth targetsDesign and implement comprehensive revenue strategies that align with our scientific approach to blockchain growth, ensuring measurable outcomes for both Flipside and our partnersBuild and mentor high-performing teams across revenue-generating functions, fostering a culture of analytical excellence and innovative problem-solvingEstablish scalable processes and metrics-driven frameworks to optimize revenue operations and forecast future growthJoin the executive leadership team and collaborate with other C-suite executives to shape company strategy and drive organizational evolutionOwn and refine our go-to-market strategy, ensuring it reflects our position as trusted pioneers in blockchain growthDevelop and maintain key strategic relationships with blockchain ecosystem leaders and decision-makers Qualifications: 15+ years of progressive revenue leadership experience, with at least 5 years in executive rolesProven track record of scaling revenue from $20M to $100M+ ARR in fast-growing technology companiesDeep understanding of Web3 technology and blockchain ecosystems and successful expansion of Web3 organizations required; demonstrated ability to navigate the unique dynamics of the spaceStartup experience required, with preference for leaders who have guided companies through multiple growth stagesStrong analytical capabilities with experience implementing data-driven decision-making processesExcellence in cross-functional leadership and ability to align diverse teams toward common revenue objectivesStrategic mindset with the ability to balance long-term vision with tactical executionTrack record of building and scaling high-performing revenue teams in dynamic marketsExperience with complex, enterprise-level partnerships and sophisticated sales cyclesAdvanced degree in Business, Economics, or related field preferred The ideal candidate will combine the analytical rigor of a revenue scientist with the strategic vision of a growth pioneer, ready to orchestrate Flipside's next chapter of expansion in the blockchain ecosystem.

Jito Labs is architecting the future of high-performance distributed systems on Solana. We're the team behind Jito-Solana, the leading MEV Solana client, and the Jito Block Engine, which has revolutionized block building on Solana. Today, Jito-Solana currently runs on 88% of stake and 1,100 validators, producing an additional $370M of revenue for stakers and validators on the network.At Jito Labs, you'll work alongside a small, nimble group of engineers and operators who are passionate about solving complex technical challenges at the cutting edge of Solana trading and infrastructure. As a small, profitable company with product-market-fit, we're in a unique position to tackle ambitious technical challenges while maintaining our startup speed. Our team culture emphasizes:- High ownership: Every team member drives significant technical decisions and shapes our product roadmap.- Fast execution: We ship rapidly and iterate based on real-world feedback. Progress, not motion.- Technical excellence: We tackle complex problems with elegant, scalable solutions.- Sustainable growth: Strong financials and proven market fit enable us to focus on long-term impact.If you're excited about:- Solving complex distributed systems challenges- Working with cutting-edge MEV and trading infrastructure- Contributing to open-source blockchain technology- Making a tangible impact on one of the fastest-growing L1 blockchains...then we want to hear from you. We're not just building tools - we're architecting the future of high-performance distributed systems. Our work directly impacts Solana's ecosystem, enabling a faster network, better capital efficiency, and more robust DeFi applications for millions of users.We offer competitive compensation, significant equity, and the opportunity to work on problems that matter. Don't just watch the future of blockchain unfold—help us build it.About the PositionWe are seeking an exceptional Senior Test Engineer to join our core team building critical, next-generation infrastructure for the Solana ecosystem. Your goal is to accelerate the rate of engineering progress by ensuring that code deployed to production meets our performance, reliability, and compliance specifications. You will become very familiar with Solana's tech stack and ours, working very closely with core engineers within Jito Labs and other client teams (Anza, Firedancer, Syndica) to build high value testing frameworks.Responsibilities- Working with core engineers to understand challenges in moving fast and build monitoring and testing infrastructure to help the team move fast.- Stand up and tear down Solana clusters.- Build synthetic load testing plans for Solana clusters and Jito's core stack.- Plan testing frameworks for core engineers so new code written can have high impact tests.Relevant BackgroundsThe engineering team at Jito Labs consists of multi-disciplinary engineers. If you have experience in any of the following, you may be a good fit:- Embedded Systems- Firmware- Operating Systems- Robotics- HFTRequirements5+ years of systems-level programming in C, C++, or Rust (we use Rust)Obsessed with progress, not just motion, especially in the context of testingWillingness to dive into complicated systems to accurately root cause and fix issuesFamiliar with synthetic load testing and traffic replayHungry to learnClear, simple communicationHigh agencyExcitement for decentralized finance and high performance systems

Strategic Partnerships Director Flipside orchestrates blockchain growth through a powerful mix of data, science, and community. We drive measurable market cap growth for blockchain ecosystems, empower analysts with industry-leading data, and empower anyone to earn tokens by shaping the onchain economy. At the heart of our approach is a proprietary wallet scoring methodology that transforms raw onchain data into actionable growth strategies. This highly quantitative framework drives meaningful ecosystem awareness, acquisition, and activation—and has catalyzed billions in value creation for Flipside partners like Solana, Avalanche, NEAR, Aptos, and more. Founded in 2017 and backed by leading investors like Republic, Galaxy, and True Ventures, Flipside is a remote-first company with a global team of nearly 100. With an energetic community of 140,000 analysts, and dozens of top-tier blockchain partners, growth knows no bounds at Flipside. Overview  The Strategic Partnerships Director is responsible for working with potential blockchain customers to design consultative approaches to solving growth, building strong relationships and helping close transactions.  The ideal candidate is a self starter who excels with navigating a complex, multifaceted sales process, understands six and seven-figure deal making, and swiftly navigating C-suite stakeholders.  The Strategic Partnerships Director will be savvy with leveraging the right internal data and science experts to move the partnership process forward and be extremely comfortable with navigating high value transactions. Blockchain experience and success in high-level decision making will be critical to outcomes. Primary Responsibilities: In this pivotal role, you'll be at the forefront of our business development efforts, guiding us through the early and middle stages of the partnership journey with finesse. You'll develop proposals and create meaningful outcomes for partners. Your primary focus will be on building and nurturing relationships, particularly with senior executives and blockchain natives alike, independently managing these interactions and fostering enduring connections that keep our partnerships moving forward.You will conduct discovery sessions, map out strategies, and scope out potential collaborations with our prospective blockchain partners. You'll be adept at relying on internal subject matter experts  to creatively solve problems. You'll generate high-quality relationships and fuel a dynamic partnership pipeline that drives our business forward.You'll guide our team as we analyze market trends and customer needs, tailoring our partnership approaches to resonate deeply with our target audience. Qualifications: Proven track record of 5+ years of strategic and consultative projectsStrong understanding of blockchain technology and its applications; candidates with investment relationship and/or consulting experience are encouraged to apply. Candidates with a proven track record of designing large partnerships and achieving results through consultative, high EQ closing. Extremely high social and emotional intelligence; proven experience in navigating complex situations with clear communication and a desire to win. Proven ability to activate key players and navigate complex selling solutions required. Highly independent and comfortable making high-level decisions.