Ethereum jobs in crypto and blockchain companies

SORAMITSU is an award-winning global financial technology company with expertise in developing blockchain-based solutions for digital asset and identity management. Our mission is to use blockchain to promote innovation and solve pressing societal challenges.SORAMITSU is the developer of and major contributor to the open-source blockchain platform Hyperledger Iroha, which is tailored for enterprise and public-sector use. Hyperledger Iroha, a project of Hyperledger Foundation, part of the Linux Foundation, has a permissions system that is scalable and performant.Utilizing blockchain, SORAMITSU has developed a digital currency for the National Bank of Cambodia, a CBDC Proof-of-Concept with the Bank of the Lao PDR, a closed-loop payment system for the University of Aizu in Japan, an identity verification system prototype for Bank Central Asia in Indonesia, we were finalists in the Monetary Authority of Singapore CBDC Challenge, and are currently participating in Asia-Pacific's first proof-of-concept test of a cross-border, multi-currency security settlement system using distributed ledger technology with the Asian Development Bank. We have also conducted proof-of-concept tests for several major Japanese enterprises, and are active contributors to open source projects, such as Klaytn, South Korea's leading Layer-1 blockchain, KAGOME, the C++ Polkadot Host implementation, the SORA crypto-economic system, the Polkaswap DEX, and the DeFi wallet, Fearless WalletBased on these experiences, SORAMITSU aims to deploy cutting-edge technology on a global level in order to expedite financial inclusion and health, mitigate economic inefficiencies, and contribute to the fulfilment of the Sustainable Development Goals.You can find out more by visiting our homepage at soramitsu.co.jp or check out our Twitter profile.We are seeking a highly skilled blockchain developer with deep expertise in blockchain technologies and smart contract development, focusing on Solidity, Ethereum, and various Layer 1 and Layer 2 protocols. This role will involve designing, implementing, and optimizing secure and scalable blockchain solutions.You will be responsible for:Develop, deploy, and maintain secure, efficient, and scalable smart contracts on Ethereum and other blockchain networks.Architect decentralized systems and define smart contract standards for new projects and features.Lead code reviews and provide mentorship to junior and mid-level developers.Optimize smart contract code for gas efficiency, performance, and security.Collaborate with cross-functional teams including frontend developers, product managers, and security experts.Identify and mitigate security risks within smart contracts.Stay up-to-date with the latest trends, tools, and best practices in Solidity and blockchain development.Perform rigorous testing and auditing of contracts, and ensure all code is secure and bug-free.Requirements:3+ years working specifically with Solidity and Ethereum-based development.Fluent EnglishDeep understanding of Ethereum's architecture, smart contracts, and related technologies.Proficient in Solidity, Web3.js, and Ethers.js.Experience with deploying and interacting with smart contracts on Ethereum, Binance Smart Chain, or other EVM-compatible blockchains.Familiarity with common design patterns (e.g., ERC-20, ERC-721, ERC-1155) and decentralized protocols.Expertise in smart contract security practices, including common vulnerabilities (e.g., reentrancy, overflow/underflow, front-running).Knowledge of decentralized finance (DeFi) protocols and their smart contract ecosystems.Experience with testing frameworks (e.g., Truffle, Hardhat, Foundry).Experience with CI/CD pipelines and blockchain-specific deployment strategies.Ability to communicate complex technical concepts effectively to both technical and non-technical stakeholders.Strong problem-solving, debugging, and optimization skills.Preferred:Experience in developing for Layer 2 networks or alternative blockchain protocols (e.g., Optimism, Arbitrum, Polygon).Familiarity with cross-chain technologies and bridging protocols.Experience with smart contract auditing tools like Slither, MythX, and othersGeneral Skills:Programming Languages: Solidity, JavaScript, Python, with knowledge of Rust considered a plus.Blockchain Platforms: Ethereum, Binance Smart Chain, Polygon, Arbitrum, Optimism, etc.Frameworks & Libraries: Truffle, Hardhat, Foundry, Web3.js, Ethers.js.Security Best Practices: Smart contract auditing, vulnerability mitigation, best practices for gas optimization.Collaboration Tools: Git, GitHub/GitLab, JIRA, Slack, etc.Soft Skills: Strong communication in English, problem-solving, and analytical thinking.Additional Requirements:Please include a link to your GitHub profile showcasing examples of your code or repositories where you’ve contributed.What we offer:A relaxed remote-first (work from anywhere) work environment with flexible working hoursA permanent, full-time role with a rapidly growing international team of professionalsAn educational budget to support your continued growth and developmentOpportunities to attend global meetups and conferences for learning and/or speaking engagementsAn opportunity to be a part of an award-winning team designing a better world through decentralized technologiesThis is a remote position. Our distributed team is mostly spread across Europe and Asia. Team meetings are held generally during European working hours, and it is expected that you would adapt if necessary and be available accordingly.If you have the required qualifications and are passionate about the Web3 industry, we encourage you to apply for this exciting opportunity.SORAMITSU values diversity and is committed to providing equal opportunities for all applicants and employees. Our employment decisions, such as hiring, promotion, discipline, and termination, are based solely on an individual's qualifications, performance, and business needs. We do not discriminate against anyone on the basis of their race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, veteran status, or any other protected status under federal, state, or local law.

Ethereum Name Service (ENS) is a decentralized, permissionless naming system built on the Ethereum blockchain that enables human-readable names (like "myname.eth") to be linked to standard Ethereum addresses and other distributed systems. As one of the first protocols built on Ethereum, ENS has enabled over 3 million registered .eth names, and over another 20 million ENS names from teams such as Coinbase, Uniswap, and Linea, as well as integrations with hundreds of other apps, wallets, protocols, and browsers in the crypto ecosystem. ENS Labs has been driving the core development of the ENS protocol since 2018. We created the ENS app, open-source libraries, and core smart contracts. We are on a mission to make crypto-powered experiences as easy and accessible as browsing the web. Join us as we build the next iteration of our protocol, ENSv2, and pioneer a more decentralized, flexible, and scalable ENS for the future. We are seeking a highly skilled ZK Engineer to join our team and help integrate Zero-Knowledge proofs into ENS protocol to enhance its security, scalability, and privacy features.   About the Role The ZK Engineer will be responsible for developing, implementing, and optimizing Zero-Knowledge proof solutions within the ENS ecosystem. This includes working on privacy-preserving features, transaction verification, and scalability solutions that will enable ENS to meet the growing demands of the Web3 community. You will collaborate with cross-functional teams to integrate ZK technology into ENS’s existing and future infrastructure, ensuring that new features align with decentralized principles and privacy concerns. The ideal candidate will have a deep understanding of cryptographic protocols, particularly Zero-Knowledge proofs, and how they can be applied to blockchain ecosystems. Experience in Ethereum, zk-SNARKs, zk-STARKs, or similar ZK protocols is a significant plus.   What You'll Do Design, implement, and optimize Zero-Knowledge proof systems (such as zk-SNARKs or zk-STARKs) to improve the privacy, scalability, and performance of the ENS platform. Collaborate with the product and engineering teams to develop privacy-preserving features for ENS users, ensuring that sensitive data is protected while maintaining decentralization. Work closely with Ethereum and blockchain engineers to integrate ZK solutions with existing Ethereum smart contracts, layer-2 protocols, and other decentralized systems. Implement Zero-Knowledge scalability solutions to optimize ENS performance, ensuring security and integrity through testing and auditing cryptographic proofs and smart contracts. Work closely with other engineers to ensure seamless integration of ZK features across the ENS platform. Contribute to the ENS community and the broader Ethereum ecosystem by sharing knowledge about ZK technologies, best practices, and new developments in privacy and scalability solutions.   Who You Are 3+ years of experience with Zero-Knowledge proofs or cryptographic tech in blockchain or distributed systems. Proficient in ZK protocols and privacy-enhancing cryptographic techniques. Hands-on experience with Ethereum smart contracts, Layer-2 solutions, and blockchain tech. Strong understanding of Ethereum, DeFi, and Web3 ecosystems. Excellent problem-solving skills, applying ZK to privacy, scalability, and security challenges. Experience designing and implementing cryptographic solutions in decentralized systems. Strong communication skills, able to explain complex concepts to technical and non-technical audiences.   It’s a Plus, If You Have Familiarity with Ethereum Layer-2 protocols (e.g., Optimistic Rollups, zk-Rollups) and their interaction with Zero-Knowledge proofs. Experience with formal verification of cryptographic protocols or smart contracts. Contributions to open-source cryptographic projects or publications in cryptography and blockchain.

Welcome to Playmate, your trusted partner in creating stunning, functional, and user-friendly websites that drive results. With a passion for innovation and a commitment to excellence, we are here to transform your online presence and help you achieve your digital goals.The RoleYou Will Be Responsible For Writing well-designed, testable and efficient code. Gathering and evaluating user feedback. Working as a part of a dynamic team to deliver winning products. Providing code documentation and other inputs to technical documents. Supporting continuous improvement by investigating alternatives and new technologies and presenting these for architectural review. Troubleshooting and debugging to optimise performance. Leading the design, creation, and implementation of a suite of software. Building a strong blockchain product offering. Ideal Profile You possess a Degree/Diploma in Computer Science, Engineering or related field. You have at least 3 year experience, ideally within a Software Architect or Software Engineer role. You have working knowledge of Web3, Solidity, Smart contract, Crypto and Ethereum You are highly goal driven and work well in fast paced environments You possess strong analytical skills and are comfortable dealing with numerical data You are a self-starter and demonstrate a high level of resilience What's on Offer? Work alongside & learn from best in class talent Flexible working options Attractive salary & benefits   The interview process     Coding test. Meet with CTO Final interview.     Salary     First 3 months: 12k - 16k USD 3+ months: 16k - 20k USD

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 Us 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. 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 The Parity DevOps team is part of the Parity Infrastructure & Data department, made of more than 20 people. We are remote-first, but can also work from offices in Berlin, Lisbon, and London About the Position As the DevOps/SRE Team Lead, you will lead a team of 5 DevOps/SRE engineers responsible for maintaining the infrastructure and tools that support the development of Parity’s Polkadot SDK. Within the Product Engineering department, you will collaborate closely with cross-functional teams to ensure the reliability, scalability, and security of our systems. Your leadership and expertise will play a crucial role in advancing automation, enhancing efficiency, and optimising the performance of our entire technology stack. Lead a team of DevOps engineers, providing guidance, mentorship, and support Define and implement best practices for infrastructure automation, continuous delivery and cloud operations Provide strategic direction and contribute to the overall technology roadmap Drive the adoption of DevOps culture, practices, and tools across the organisation Collaborate with software development teams to streamline the build, deployment, and release processes Establish and maintain robust monitoring, alerting, and logging systems to ensure system reliability and availability Continuously evaluate and implement new technologies and tools to improve efficiency and productivity Liaise with stakeholders to gather requirements, prioritise projects, and communicate progress About You Strong leadership and team management skills, with the ability to inspire and motivate others Strong understanding of containerization technologies such as Docker and orchestration tools like Kubernetes Experience with multiple cloud providers such as AWS, GCP, Azure, DigitalOcean, OVH, Scaleway, etc. Experience leveraging Infrastructure as Code (eg. Terraform, Ansible) and GitOps (eg. ArgoCD, FluxCD) tooling. Expertise in Linux-based systems Proven experience managing infrastructure teams, and  overseeing large scalable, resilient and observable systems Strong communication, collaboration, and interpersonal skills 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 Opportunity to relocate to Germany or Portugal (with visa sponsorship) Those joining our collective as an employee in Germany, Portugal, and the UK, also enjoy benefits such as healthcare, 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.

Eigen Labs is more than just a leading name in the blockchain space. We’re the driving force behind EigenLayer, a game-changing solution that revolutionizes crypto-economic security. Imagine a world where blockchain projects break free from the shackles of the scaling trilemma and capital limitations.  In today's blockchain ecosystem, each service is typically secured by its own tokenized trust-network. With EigenLayer, services can build upon the established security of the Ethereum trust network, unlocking untold scalability while maintaining security and decentralization. The Product team at Eigen Labs is on a mission to scale the platform to 1B users. Our Product Managers will be hyper-customer-focused and will translate that focus to the engineering teams. We’re looking for our first external Product hire to bring best-practices and top notch Product thinking. THE ROLE We are seeking a visionary and dynamic Product Manager to join our team and shepherd the development of a complete product line. As our first Product Management hire, you will play a pivotal role in steering our product through various stages of its lifecycle, balancing the needs of different stakeholders while staying focused on the product’s core value proposition. Your ultimate goal is to help us reach over 1 billion users; companies like LinkedIn, Facebook, Google, will all be building applications on top of EigenLayer. WHAT YOU WILL DO Set Clear Goals: Define what success looks like for the product, advocate for our customers, and collaborate with engineering on milestones and deliverables. Prioritize Strategically: Standardize and use a scalable framework to prioritize features and improvements that align with the product’s goals. Foster Cross-Functional Internal Communication: Ensure that all stakeholders understand the product vision and how their work contributes to it. Be Data-Driven: Make decisions based on data and customer feedback, ensuring the product meets the highest standards of usability and performance. WHAT YOU WILL BRING Education: Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent work experience. Experience:  5-7 years of product management experience, within the tech industry. Proven experience managing product at a rapidly scaling tech  startup. Highly technical experience working closely with engineering teams. Skills:  Exceptional ability to define product vision and strategy. Proven track record of taking products from concept to market success. Excellent communication and collaboration skills, with the ability to influence and inspire cross-functional teams. Data-driven mindset with strong analytical skills. Ability to prioritize and manage multiple tasks in a fast-paced environment. Strong customer empathy and advocacy. NICE TO HAVES Strong understanding of blockchain technology, especially Ethereum. Experience with Ethereum and other PoS blockchain protocols In compliance with local law, we are disclosing the compensation, or a range thereof, for roles in locations where legally required. $150,000 - $250,000 is the annual base salary. Other rewards may include annual bonuses, short- and long-term incentives, and program-specific awards. In addition, Eigen Labs provides various employee benefits, including:  Employer-covered Medical, Dental, and Vision plans 401k  Unlimited Paid Time Off 12 weeks of fully paid maternity and paternity leave #LI-Remote | #LI-AC1

  The Role: We are looking for a Senior Django Developer for one of our clients. You are a perfect candidate if you are growth-oriented, you love what you do, and you enjoy working on new ideas to develop exciting products. What we’re looking for: 5+ years of web development experience, with at least 4 years specialising in Django. Strong understanding of the Django ORM, Django REST framework, and Python. Able to integrate multiple data sources and databases into one system. Understanding of the threading limitations of Python, and multi-process architecture. Good understanding of server-side templating languages (such as Jinja 2, Mako). Familiarity with event-driven programming in Python. Understanding of accessibility and security compliance. Knowledge of user authentication and authorization between multiple systems, servers, and environments. Strong unit test and debugging skills. Proficient understanding of code versioning tools like Git. Responsibilities: Design, develop, and maintain web applications using Django. Implement security and data protection solutions. Optimise applications for maximum speed and scalability. Contribute to all phases of the development lifecycle. Write reusable, testable, and efficient code. Design and implement low-latency, high-availability, and performant applications. Collaborate with the product team to define and implement new features to meet business requirements.    What we offer:   Get paid, not played No more unreliable clients. Enjoy on-time monthly payments with flexible withdrawal options. Predictable project hours Enjoy a harmonious work-life balance with consistent 8-hour working days with clients. Flex days, so you can recharge Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify. Career-accelerating positions at cutting-edge companies Discover exclusive long-term remote positions at the world's most exciting companies. Hand-picked opportunities just for you Skip the typical recruitment roadblocks and biases with personally matched positions. One seamless process, multiple opportunities A one-time contracting process for endless opportunities, with no extra assessments. Compensation Enjoy the same pay, every month with positions landed through Proxify.

Company Description At Snarkify, we are passionately driven by our mission to scale zero-knowledge proofs (ZKPs) for a decentralized future. We empower developers by providing robust infrastructure and user-friendly tools, enabling them to effectively build, deploy, and scale ZKP applications. Our operations are steered by a stellar founding team comprising two Ph.D. holders and a Master holder. Our founders carry exceptional expertise gained from renowned organizations such as the Ethereum Foundation, Facebook, Amazon, and Dropbox. Through the application of folding schemes, proof aggregation, and GPU acceleration, we're pushing the scalability of proof systems to unprecedented levels. Through this unwavering commitment, we are shaping a future that promises enhanced security, privacy, and decentralization. Job Description Snarkify is seeking a visionary and strategic Head of Marketing to lead our marketing efforts and drive our brand’s growth in the rapidly evolving landscape of zero-knowledge proofs (ZKPs) and decentralized technology. This role is crucial in defining and executing our go-to-market strategy, establishing our brand presence, and driving customer acquisition and engagement across multiple channels. The ideal candidate will have a strong background in marketing within the blockchain or ZK space, combined with experience in B2B business development or sales. You will be responsible for crafting and executing innovative marketing campaigns that resonate with our target audience, positioning Snarkify as a leader in the ZK industry. Your strategic mindset, combined with a hands-on approach, will be key to driving growth and achieving our business objectives. Responsibilities Develop and Execute Marketing Strategy: Craft and implement a comprehensive marketing strategy that aligns with Snarkify’s business goals and growth objectives. Brand Positioning and Messaging: Define and articulate Snarkify’s value proposition, ensuring consistent and compelling messaging across all channels. Content and Thought Leadership: Develop and oversee the creation of high-quality content, including whitepapers, case studies, blog posts, and webinars, to establish Snarkify as a thought leader in the ZK space. Demand Generation: Lead efforts to generate and nurture leads through multi-channel campaigns, including digital marketing, content marketing, events, and partnerships. Business Development Support: Collaborate closely with the business development team to create impactful presentations, marketing collateral, and tools that enhance and support their efforts to drive growth. Market Research and Analysis: Conduct market research to stay informed about industry trends, competitor activities, and customer needs, using insights to refine marketing strategies. Partnerships and Ecosystem Development: Identify and build strategic partnerships within the blockchain and ZK ecosystem to expand Snarkify’s reach and influence. Team Leadership: Build and lead a high-performing marketing team, fostering a culture of creativity, collaboration, and continuous improvement. Qualifications Experience in Blockchain Marketing: 5+ years of marketing experience in general, with at least 2+ years in the blockchain space. Experience in zero-knowledge proofs (ZK) is preferred, with a proven track record of successful marketing campaigns and brand growth. Strategic Vision: Demonstrated ability to develop and execute comprehensive marketing strategies that drive growth and brand awareness. Leadership Skills: Proven experience in building and leading marketing teams, with strong people management skills and the ability to inspire and motivate. Content Creation: Strong skills in content creation and thought leadership, with a knack for translating complex technical concepts into compelling and accessible content. Analytical Mindset: Proficiency in marketing analytics and the ability to leverage data to inform decision-making and optimize marketing performance. B2B Work Experience: Previous work experience in a B2B environment is preferred, with the ability to understand and align marketing efforts with customer needs and foster strong customer relationships. A customer-first mindset is essential. Excellent Communication: Exceptional written and verbal communication skills, with the ability to articulate complex ideas clearly and persuasively. Adaptability: Ability to thrive in a fast-paced, innovative environment, with a passion for staying ahead of industry trends and continuously improving marketing efforts. Additional Information Benefits Competitive base salary with founding member equity. The opportunity to build the next-generation ZK computing platform. Immersion in a team of top-notch global blockchain engineers. A flexible and innovative remote work environment. Room for continuous growth and development in the ZK field.