Blockchain Protocol Engineer

About UsAt Fun.xyz, we are champions of a tokenized future that empowers individuals worldwide, providing financial freedom to anyone with internet access. We envision a blockchain-centric global economy where value exchanges are not only intuitive but also secure and effortless.Introducing Checkout - the premier payment solution in the web3 landscape. By in…

About Sei LabsSei Labs is pioneering open-source technology for the high-performance Sei Blockchain, the first parallelized EVM Layer 1 blockchain engineered for industry-scale efficiency. Our innovative optimizations empower Web3 applications to achieve Web2 levels of scalability and performance, propelling the widespread adoption of digital assets.Our diverse teams include experts from leading organizations such as Google, Goldman Sachs, Robinhood, Nvidia, and Databricks, all committed to integrating the next billion users into a robust ecosystem of applications.Sei Labs has secured over $30 million from prestigious investors like Jump Crypto, Multicoin Capital, Coinbase Ventures, Distributed Global, Hudson River Trading, and Flow Traders.For more information, visit our website and our documentation.Protocol Engineering at SeiWe are in search of a Protocol Engineer to spearhead the development of essential components of the Sei Blockchain. In this role, you will be at the cutting edge of blockchain infrastructure, tasked with designing and refining the foundational layers of a scalable decentralized network. You will collaborate closely with our engineering team and ecosystem partners, continuously innovating to advance blockchain technology. If you possess a passion for low-level systems design, performance optimization, and influencing the future of decentralized networks, this is an exceptional opportunity to leave a significant mark in the Web3 landscape.

Applicant Privacy NoticeAre you ready to be part of an elite blockchain development team? At Ava Labs, we simplify the deployment of high-performance solutions for the Web3 environment, spearheading groundbreaking innovations on the Avalanche platform. Founded by a coalition of Cornell University computer scientists and seasoned Wall Street professionals, our mission is to revolutionize the way value is created through permissionless networks. Join us in our quest to enable individuals and organizations to seamlessly digitize the world’s assets on our open, programmable blockchain framework.We are seeking a Staff Engineer to become a pivotal member of our Platform Engineering Group. This team is dedicated to the maintenance and advancement of the EVM within the Avalanche blockchain ecosystem.Key Responsibilities:Enhance and maintain Avalanche’s EVM-compatible chains.Design and implement innovative extensions atop standard EVMs while ensuring ecosystem compatibility.Contribute to notable projects such as:libevm (repo): a library version of the EVM; a backwards-compatible fork of geth with customizable configuration directives to reduce merge conflicts.Streaming Asynchronous Execution (spec / talk / repo): a decoupled consensus and execution model that allows for continuous concurrent execution without enforced dormancy.Ideal Candidate Profile:A proactive individual with a relentless curiosity, comfortable navigating and understanding existing codebases. You view code as the ultimate truth and can identify subtle distinctions within it.A keen eye for detail, with a passion for producing clean and maintainable code. You write software that prioritizes user experience while embracing the joy of coding.You thrive in a hacker culture, believing creativity extends beyond the arts. You grasp system rules primarily to innovate and adapt them.What You Will Bring:Exceptional proficiency in Golang, along with a robust understanding of its core principles.

Join Merkle Science as a Sales Lead specializing in blockchain protocols. We are at the forefront of providing cutting-edge blockchain transaction monitoring and intelligence solutions, empowering web3 companies, digital asset service providers, financial institutions, law enforcement, and government agencies to detect, investigate, and prevent the illicit use of cryptocurrencies. Our mission is to ensure the safety of cryptocurrencies and facilitate their compliant growth by providing robust infrastructure.Located in the heart of New York, with additional offices in Singapore, Bangalore, and London, our team brings together diverse expertise from top organizations including Bank of America, Paypal, Luno, Thomson Reuters, and Amazon. Having raised over $27 million from prominent investors such as SIG, Beco, Republic, DCG, Kenetic, and GGV, we are well-positioned for rapid growth and impact.

Join Superstate, a pioneering force in the crypto space, as we seek a dynamic Business Development professional specializing in Protocols and DeFi to become a key member of our team in New York City. Your mission will be to drive the modernization of financial markets through innovative tokenization strategies. Reporting directly to the Head of Business Development, you will engage in comprehensive market analysis, forge strategic partnerships, create detailed proposals, and secure significant capital to propel our growth and enrich our ecosystem.We are looking for an ideal candidate who possesses a deep understanding of both traditional and decentralized finance landscapes, exceptional problem-solving and negotiation skills, and a proven track record in selling technical products and services to blockchain networks, DeFi protocols, foundations, and crypto-centric organizations.

Join our dynamic team at StemXpert as an Integration Engineer specializing in FIX Protocol. In this role, you will be responsible for designing, implementing, and maintaining integration solutions that enhance our trading platforms. Your expertise in FIX Protocol will be pivotal in ensuring seamless communication and data exchange between various financial systems.

Join Relay Protocol as a Security Engineer and play a pivotal role in safeguarding our digital infrastructure. As a Security Engineer, you will be responsible for identifying vulnerabilities, implementing security measures, and ensuring the integrity of our systems. This position offers you the chance to work with cutting-edge technologies and collaborate with a dynamic team dedicated to maintaining high security standards.

Join Omen as a Blockchain EngineerAt Omen, we are revolutionizing the trading landscape by creating a unified platform that allows users to trade various asset types with ultimate flexibility and efficiency.Picture a world where you can seamlessly buy spot equities and cryptocurrencies, trade on leveraged positions, short companies, or hold tokenized shares in diverse income-generating assets—all managed from a single interface without the hassle of multiple brokers or protocols.We envision a future for retail investors that mirrors the composability and power of institutional trading, ensuring speed, precision, and security.Our dynamic team consists of 8 dedicated engineers collaborating in our full-floor office located in the vibrant heart of Midtown NYC. Our collective expertise includes trading systems, startup innovation, application development, and a shared passion for our mission.Supported by leading seed investors, we are committed to relentless progress towards our ambitious goals.Role Overview:We are developing a cutting-edge perpetual derivatives platform featuring a high-performance off-chain trading engine complemented by on-chain settlement and enforcement. As a Blockchain Engineer, you will be an integral part of our blockchain team, creating the smart contract infrastructure that ensures the safety, accuracy, and enforceability of off-chain trades.Your collaboration with the trading systems team will be crucial in establishing clear and precise settlement semantics between off-chain states and on-chain finality.

Join Tempo, a pioneering layer-1 blockchain designed specifically for stablecoins and real-world payments, leveraging the deep expertise of Stripe in global payments and Paradigm in crypto technology.Our innovative payment-first architecture offers a scalable, cost-effective, and reliable backbone to accommodate high-volume payment scenarios. We aim to facilitate seamless, economical, and scalable money transfers, prioritizing user simplicity for fintechs, traditional banks, merchants, platforms, and all others eager to modernize their payment solutions.We are collaborating with top-tier design partners across AI, e-commerce, and financial services, including Anthropic, Coupang, Deutsche Bank, DoorDash, Mercury, Nubank, OpenAI, Revolut, Shopify, Standard Chartered, Visa, and more.Our team is composed of crypto-enthusiasts dedicated to building the essential infrastructure for significant economic transactions on the blockchain. If you thrive in a fast-paced environment and are ready to take bold steps, we invite you to join us!About the RoleAs a Product Engineer, you will empower users to leverage the Tempo blockchain through the development of first-party applications like the Tempo Wallet and by facilitating integrations for customers to enhance their stablecoin transactions. You will engage closely with production-grade blockchain systems and transaction flows.This position is ideally suited for former founders or aspiring entrepreneurs. You will encounter a diverse array of critical payment and crypto challenges across startups, mid-market firms, and large enterprises, allowing you to oscillate between product development and deployment in customer environments, thereby gaining comprehensive insights into the entire product lifecycle, from integration to market strategy.Key ResponsibilitiesDesign and develop internal and first-party applications for both agents and users.Collaborate with startups and enterprise clients to integrate Tempo into their payment infrastructures.Acquire an in-depth understanding of the Tempo blockchain and its product suite.Quickly navigate through unfamiliar codebases and organizations to ensure timely product launches.Gather field insights to enhance the product, developer experience, and blockchain technology.

Join Allium: Simplifying Blockchain DataAt Allium, we are dedicated to transforming blockchain data into accessible, accurate, and efficient resources. Founded in late 2021, our mission is to tackle the chaos surrounding blockchain data, making it easier for users to engage with.The Challenge of Blockchain DataBlockchain data presents unique challenges—it is often complex, unstructured, and difficult to manipulate. Simple queries, such as identifying the largest Ethereum token holders over time, can require an entire engineering team to navigate the intricacies of blockchain technology.Understanding Blockchain LimitationsHistorically, blockchain systems have been optimized for writing data rather than reading it. This imbalance complicates the retrieval of data, leading to inefficiencies and hurdles when accessing the information we need.The Need for ExpertiseExpertise in blockchain data is crucial for parsing and interpreting this information. As Tim Roughgarden eloquently stated, “Blockchains are (virtual) computers, not databases.” The diverse use cases for smart contracts result in a fragmented landscape of data schemas, underscoring the necessity for specialists who can standardize and clarify this information.Our SolutionAllium addresses these challenges by ingesting, sanitizing, and standardizing blockchain data from over 100 blockchains, currently archiving petabytes of information. Our goal is to index and simplify this data for users, just as Google and Bloomberg did for their respective domains.Be Part of the ChangeWe invite you to join us in revolutionizing the blockchain space. If you’re eager to learn and contribute to a groundbreaking project, Allium is the place for you!

Join Allium: Simplifying Blockchain DataThe Challenge of Blockchain DataSince our inception in late 2021, we recognized a critical truth: blockchain data is publicly available but notoriously difficult to interpret and access. Simple inquiries, such as “Who are the largest Ethereum token holders over time?”, often necessitate a skilled engineering team to set up RPC nodes, process vast amounts of blockchain history, and execute complex SQL queries.Why Accessing Blockchain Data is ChallengingHistorically, blockchains have been designed to optimize write operations rather than read operations. This focus on enhancing transaction throughput and building robust consensus algorithms has made it increasingly difficult to extract data efficiently and reliably.Expertise Required for Blockchain Data InterpretationAs noted by Columbia Professor Tim Roughgarden, “Blockchains are (virtual) computers, not databases.” They serve as Turing machines that allow for diverse computations, leading to a myriad of data schemas tailored for various applications. Standardizing these schemas requires specialized knowledge to transform obscure technical outputs into understandable insights regarding tokens, NFTs, stablecoins, and DEXs.Allium's SolutionAt Allium, we address this complexity by ingesting, sanitizing, and standardizing blockchain data. Our extensive archive spans over 100 blockchains, amounting to petabytes of data that is rapidly expanding.A Mission to Organize Blockchain DataSimilar to how Google and Bloomberg revolutionized access to financial and web data, Allium aims to index blockchain data for universal accessibility. This endeavor supports innovators within the industry and positions us as a vital contributor to the blockchain ecosystem.

About UsSei is pioneering the future of blockchain technology as the first parallelized layer 1 blockchain. By enhancing the most prevalent execution environment in Web3, we are establishing unmatched standards in performance and scalability. Applications on Sei harness the speed of web2, coupled with the decentralization and autonomy of web3. For more insights, visit Sei's official website.At the Sei Development Foundation, we are on the hunt for a passionate Recruiter who shares our enthusiasm for Web3. This role will collaborate with leaders across Business Development, Growth, Product, and more to expand the Sei team both locally in New York and globally. You will be hands-on in sourcing and hiring top-tier Web3 talent across a wide range of roles.Join a distinguished team in the Web3 space, featuring accomplished leaders from renowned organizations such as Polygon, Solana, Protocol Labs, and Binance, as we build the world’s fastest blockchain.

About Blackbird:Blackbird Labs is a cutting-edge loyalty and payments platform dedicated to fostering meaningful connections between premier restaurants and their patrons.Founded in 2022 by Ben Leventhal, co-founder of Eater and Resy, Blackbird offers a highly customizable loyalty program for restaurants alongside a consumer app designed to ensure every guest feels like a true VIP, regardless of where they choose to dine. Supported by visionary investors including Union Square Ventures, a16z, Amex Ventures, and Variant Fund, Blackbird is on a mission to transform the restaurant industry.About Our Team:At Blackbird, our core values drive our actions, and our talent principles outline the characteristics we seek in our team members.We possess a passion for our product, relentlessly dedicated to our mission and always striving to exceed our customers' expectations. We are elite performers, committed to achieving outstanding results through excellence, rapid learning, and unwavering determination. We elevate each other, taking initiative to uplift our colleagues, embracing feedback, and fostering a growth-oriented culture. Together, we hold ourselves accountable to embody our talent principles as we work towards our shared mission.About the RoleAt Blackbird, we aspire for every guest to feel like a VIP from the moment they step into a restaurant. From last-minute reservations to welcome drinks, off-menu items, and exclusive perks, we are developing a platform that empowers restaurants to identify, engage, and reward their guests in personalized and impactful ways.Our vision is simple: the more you visit your favorite spots, the more you unlock—from unique rewards to seamless direct messaging for reservations. With every visit, you earn $FLY, our universal rewards currency, redeemable across our network of exceptional restaurants.As a Senior Backend Engineer, you will integrate traditional fintech with blockchain technology to construct our next-generation payment infrastructure. Collaborating closely with product managers, designers, and fellow engineers, you will define and execute the technical roadmap for our cryptocurrency payment and loyalty platforms. You will influence critical architectural decisions, establish engineering best practices, and contribute to the scalability of secure, user-friendly Web3 payment experiences.We seek an individual who thrives in a fast-paced, ownership-driven environment and is passionate about crafting products that create seamless user experiences.

Blockchain is shaping the future of finance by connecting people globally to cryptocurrency. As a leading and rapidly expanding global crypto platform, we empower millions to safely engage with digital currencies. Established in 2011, Blockchain has won the confidence of over 90 million wallet holders and more than 40 million verified users, overseeing over $1 trillion in crypto transactions.We are on the lookout for a driven and commercially savvy VIP Relationship Manager (RM) to spearhead and elevate Blockchain.com’s exclusive VIP and Wealth program. In this pivotal role, you will cultivate and expand a portfolio of affluent clients, serving as a trusted advisor, relationship manager, and growth partner. Your contributions will be vital in enhancing client engagement across trading, Earn, lending, OTC, and referrals, all while providing an exceptional, concierge-style experience.This senior role is revenue-impacting and tailored for charismatic, influential, and highly motivated relationship builders who excel in consultative sales environments.RESPONSIBILITIESClient Relationship Management & Concierge ServicesOwn and manage a portfolio of high-net-worth and top-revenue VIP clients.Act as the primary point of contact for clients throughout onboarding, account support, product adoption, and portfolio growth.Deliver an unparalleled, concierge-style experience through direct messaging and real-time communication channels (including Telegram).Driving Revenue Growth & Portfolio ExpansionProactively drive upsell and cross-sell across the VIP product suite, including Trading, OTC, Earn, Lending, referrals, and promotional programs.Identify opportunities to enhance client AUM, trading activity, and product penetration through consultative discovery and tailored solutions.Collaborate with clients to comprehend their trading behavior, portfolio objectives, and risk preferences to recommend fitting products and incentives.Client Discovery & Needs AssessmentConduct structured discovery conversations to comprehend client goals, asset allocation, trading patterns, and competitive usage.Segment clients by archetype (e.g., active traders vs. long-term holders) to personalize engagement and growth strategies.Collaboration with Sales, Product & Operations TeamsCoordinate closely with institutional sales, OTC, product, operations, and other relevant teams to enhance client satisfaction and service delivery.

Transforming Blockchain Data into ClarityAt Allium, we are dedicated to simplifying the complexities of blockchain data, making it accessible, accurate, and fast.The Challenge of Blockchain DataSince our inception in late 2021, we recognized that although blockchain data is publicly available, it remains notoriously difficult to comprehend and access. For instance, answering questions like “Who are the largest Ethereum token holders over time?” typically necessitates a full engineering effort to manage RPC nodes, process extensive blockchain histories, and execute intricate SQL queries.Optimization ChallengesHistorically, blockchains have been designed for efficient Writes, with less focus on Reads, complicating the extraction of data. This design prioritizes transaction speed and fault tolerance, yet it hinders reliable data retrieval.Expertise in Data Manipulation RequiredAs Tim Roughgarden, a Columbia Professor, aptly noted, “Blockchains are (virtual) computers, not databases.” This complexity, coupled with the diverse use cases and fragmented data schemas, necessitates profound domain knowledge to convert complex technical outputs into comprehensible data regarding tokens, NFTs, stablecoins, and DEXs.Our SolutionAllium streamlines this process by ingesting, sanitizing, and standardizing data from over 100 blockchains, amassing petabytes of information that grow exponentially.Join Us in Revolutionizing Blockchain DataOur mission parallels that of Google and Bloomberg in organizing vast datasets, as we strive to index blockchain data for the benefit of the industry. We are excited to support pioneers in this space and contribute to the evolution of blockchain analytics.

About the CompanyEstablished in 2018 by esteemed professors from Yale University and Columbia University, CertiK stands at the forefront of blockchain security. We leverage cutting-edge AI technology to safeguard and oversee blockchain protocols and smart contracts. Our mission is to enhance cybersecurity across the digital landscape, starting with blockchain. By integrating pioneering academic research into practical applications, we empower the creation of mission-critical systems that prioritize security and accuracy. Recognized as a leader and one of the fastest-growing firms in blockchain security, CertiK boasts a client roster that includes prominent names such as Aave, Polygon, Binance Smart Chain, Yearn, and Chiliz. Our investors comprise top venture capital firms like Tiger Global, Coatue Management, Shunwei Capital, and Hillhouse Capital, along with industry giants like Coinbase Ventures and Binance.About the PositionAs a Blockchain Security Intern, your primary responsibility will be to lead the development of an intelligent AI agent powered by large language models (LLMs) to enhance our security auditing tools within the blockchain sector. Collaborating closely with our blockchain security team, you will merge state-of-the-art academic research with real-world applications. Your focus will be on designing, fine-tuning, and integrating AI agents that automatically evaluate smart contracts to identify vulnerabilities. This role will immerse you in research and experimentation, as you explore innovative methods to improve threat detection and risk assessment within our security audit platform, thus directly contributing to the creation of more secure blockchain infrastructures.

About SerotoninSerotonin is a leading go-to-market firm dedicated to transformative technologies. We specialize in marketing, strategic consulting, recruitment, and legal services. With a talented global team of 90 professionals across 15 countries, we have successfully supported over 300 clients in sectors such as consumer technology, web3 infrastructure, digital assets, venture capital, and artificial intelligence since our inception in 2020. Our comprehensive go-to-market solutions span all major marketing channels, including public relations, growth marketing, on-chain analytics, content creation, research, social media engagement, and design. At the heart of our operations is the Serotonin Platform, which acts as a vital hub for the web3 ecosystem, connecting innovators and entrepreneurs with the essential resources they need to thrive.Role OverviewWe are seeking a dynamic data professional who blends robust analytical prowess with engineering skills to develop and sustain the infrastructure for data analytics. This hybrid role is ideal for those who are passionate about uncovering insights while building scalable systems to facilitate data delivery. You will engage with the entire data stack, from developing pipelines to executing statistical modeling.

Columbia University's School of Professional Studies (SPS) is seeking qualified candidates for a part-time position as an Adjunct Lecturer to instruct a graduate-level course titled Introduction to Blockchain, Cryptocurrencies & Analytics. This course is designed for students pursuing a Master of Science degree in Applied Analytics and will cover foundational concepts in blockchain technology, cryptocurrency mechanisms, cryptographic protocols, hashing, digital signatures, transaction chaining, mining based on proof of work, and smart contracts.

Columbia University is actively seeking qualified professionals to join our team as part-time Adjunct Associate Faculty for the graduate-level course titled Introduction to Blockchain, Cryptocurrencies & Analytics. This course is designed to impart essential knowledge about blockchain technology and cryptocurrencies to our Master of Science students in Applied Analytics. Topics covered will include cryptographic protocols, hashing, digital signatures, transaction chaining, decentralization through proof of work mining, and smart contracts.The role of an Adjunct Associate Faculty member is pivotal for providing expertise and facilitating the learning process within the course. This position offers an excellent opportunity to gain valuable experience in graduate-level education at Columbia University.

Role overview Smith Engineering is seeking a Director of Design Engineering to lead its design team in New York City. This leader will oversee the development of engineering solutions that meet client requirements and comply with industry standards. The role involves shaping project direction and supporting the growth of a skilled group of engineers. What you will do Guide and manage the design engineering team Drive the creation of efficient, high-quality engineering designs Ensure all work aligns with client needs and industry standards Mentor and develop engineering talent within the team Influence the direction of engineering projects at Smith Engineering