Security Engineer at Relay Protocol | New York

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 dive…

Join Rockstar, a pioneering foundation committed to advancing the growth, decentralization, and sustainability of a leading decentralized finance protocol. Our mission focuses on delivering value in key areas such as Protocol and Innovation, Developer Support, Governance, Research, and Security through strategic grant-making.We are on the lookout for a skilled Protocol Engineer to become a vital part of our technical team. You will play an instrumental role in developing smart contracts for in-house initiatives, the Unichain protocol, and collaborations with grantees.In this position, you will be tasked with designing, implementing, and optimizing smart contract systems. You will actively engage in technical design discussions, evaluating trade-offs among optimization, flexibility, and integration, while also offering design feedback to ecosystem participants, including hook developers and DeFi projects on Unichain.Key Responsibilities:Design, implement, and optimize Solidity-based smart contracts for protocol-related projects, prioritizing security, efficiency, and maintainability.Provide technical guidance and design feedback to external developers building on the protocol and Unichain, including hook developers and DeFi projects.Explore and prototype novel DeFi primitives, trading mechanisms, and smart contract architectures to enhance the protocol’s functionalities.Participate in design sessions and code reviews to uphold high standards in code quality, security, and organization.Implement unit tests, fuzz testing, and gas optimizations to ensure the reliability and performance of smart contracts.Potential Areas of Work:Hooks and reference implementations for the protocol's latest versionExperimental swapping UX designsIndexers and graph traversal algorithmsComposable DeFi legosSDK abstractions and developer toolingPeriphery integrations such as liquidity management tools and swap-and-add functionalitiesQualifications:Required Skills & Experience:In-depth understanding of DeFi patterns and smart contract architectureMinimum two years of experience crafting complex Solidity smart contracts with a focus on readability, maintainability, and securityProficiency with Foundry, including cheatcodes, foundry.toml, and script executionExperience in unit testing and fuzz testing for smart contract securityConfidence in using Git and managing version control in a collaborative engineering environmentAbility to design clean abstractions and reusable smart contract componentsFamiliarity with the latest version of the protocol's contracts and associated DeFi protocolsPreferred Qualifications:Experience with Yul and other low-level programming languages

Join Protocol Cares as a Behavioral Health Care Manager and play a pivotal role in enhancing the lives of individuals dealing with mental health challenges. In this position, you will collaborate with multidisciplinary teams to develop tailored care plans, monitor patient progress, and ensure the delivery of high-quality health services. Your expertise will contribute to creating a supportive and effective environment for both patients and staff.

Join charnetwork as a Protocol Core Engineer, where you'll play a critical role in designing and implementing cutting-edge protocols that drive our innovative solutions. Collaborate with a dynamic team of engineers and contribute to the development of scalable and robust systems.

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 integrating Checkout, decentralized applications (dApps) allow users to execute any on-chain transaction using cryptocurrency from a wallet, a centralized exchange, or fiat currency from a bank account or card. With access to top-tier asset routing and their portfolios at the point of sale, users are quicker, more loyal, and deeply engaged.We engineered Checkout with a vision of a world where purchasing anything with any asset is feasible for everyone, everywhere. If this vision resonates with you, we would love to connect.Role OverviewWe are seeking a skilled Protocol Engineer to join our core blockchain team and contribute to the development of foundational Web3 payment infrastructure. This pivotal role presents the chance to tackle complex technical challenges at the crossroads of smart contracts, cross-chain protocols, and decentralized finance.You will be responsible for designing and implementing secure and efficient smart contract systems and blockchain integrations that facilitate millions of transactions across various chains. This position is ideal for a technically adept engineer who flourishes in dynamic environments and is eager to influence the future of decentralized finance.

Wormhole Labs stands at the forefront of blockchain innovation, dedicated to creating decentralized systems that promote a more equitable global economy. We are transforming financial infrastructures across the entire cryptocurrency landscape, from foundational protocol development to trading systems and user-centric applications.We pride ourselves on being technological pioneers, merging traditional finance with the boundless opportunities presented by cryptocurrency. Our experienced team applies extensive technical knowledge to craft solutions that push the industry forward. We invite skilled individuals who resonate with our vision and possess the technical expertise necessary to actualize it — come be part of our journey!As a Solana Protocol Engineer at Wormhole Labs, you will play a vital role in enhancing Wormhole’s suite of programs and protocols on the Solana platform. You will collaborate with domain experts throughout the complete protocol development lifecycle, including ideation, design, implementation, security assessment, and deployment.

Who We Are → About Matter LabsAt Matter Labs, we are driven by the belief that freedom is the catalyst for progress and prosperity. Our mission is to promote freedom for everyone through the widespread adoption of cryptocurrency.To realize this vision, we are developing ZKsync, a verifiable blockchain network secured by zero-knowledge proofs. With over $250 million in backing from some of the most intelligent investors globally, we move swiftly, deliver frequently, and evaluate ourselves based on the outcomes we produce.Currently, over 20 teams are either running or building custom ZKsync chains on our network, including crypto leaders like Crypto.com, Abstract, and Lens, along with global corporations such as Deutsche Bank and Xsolla.Protocol Security EngineerWe are looking for a talented Protocol Security Engineer to join our dedicated Security Team. This position combines practical security work with the chance to shape protocol security from the inception of development. Your primary focus will be on protecting ZKsync’s core elements—smart contracts, ZK circuits, and blockchain nodes—while remaining at the forefront of security research and best industry practices.This opportunity is perfect for individuals who are inquisitive, enjoy challenging systems, and wish to apply that mindset ethically in a high-stakes environment.Your ResponsibilitiesDeliberately testing systems—performing threat modeling and internal audits of Solidity contracts, blockchain state transition functions (Rust), and other critical infrastructures.Monitoring emerging hacks, exploits, and attack vectors across the industry, and converting lessons learned into practical security enhancements.Instilling security best practices within development teams and advocating for secure design principles.

About Polygon LabsPolygon Labs is a pioneering global blockchain payments firm dedicated to developing and maintaining cutting-edge infrastructure designed to facilitate instantaneous, reliable money transfers at internet scale. Our mission is to transition all financial transactions on-chain, empowering users with the Polygon Open Money Stack—a cohesive array of services and technologies that ensures the seamless movement of funds globally. Our robust infrastructure has already enabled trillions in on-chain value transfers, supporting millions of daily transactions for many of the world's leading banks, fintech companies, large enterprises, and consumer applications.Your RoleAs a Staff Engineer on the Polygon Proof of Stake (PoS) engineering team, you will play a pivotal role in enhancing one of the most widely utilized networks within the Web3 ecosystem. Reporting to the Senior Vice President of Engineering, you will spearhead initiatives to tackle complex protocol-level challenges concerning scalability, state growth, and latency, ultimately shaping the architectural framework for the future of Polygon PoS. This is an exceptional opportunity to contribute to Ethereum-aligned infrastructure designed for massive scalability, collaborating with some of the most skilled protocol engineers in the industry.Joining a compact, high-caliber team of 7 engineers, you will be expected to lead by example, promoting a culture of excellence in design, implementation, and teamwork. This position is ideal for individuals with extensive expertise in protocol design and Golang development who are eager to build high-performance, resilient systems in a rapidly changing technological landscape.Your ResponsibilitiesLead the design and prototyping of innovative, long-term solutions to address scalability, latency, and state growth challenges on the Polygon PoS network.Drive architectural decisions across the PoS codebase, contributing to systems such as Geth, Cosmos SDK, or CometBFT as required.Identify and resolve intricate technical challenges relating to protocol behavior, consensus, and state synchronization.Promote code quality, comprehensive documentation, testing procedures, and developer best practices throughout the team.Mentor and assist engineers across the stack, elevating the overall technical standards.Collaborate cross-functionally with protocol researchers, DevOps, security, and ecosystem teams to deploy robust upgrades to the live network.What You'll Need7+ years of backend or protocol engineering experience, with at least 2 years in senior or staff-level positions.Extensive experience with Golang, ideally within decentralized or distributed systems.

Join our innovative team at Lightning Labs as a Lightning Protocol Engineer, where you'll play a pivotal role in the advancement of cryptocurrency technology. We are seeking a skilled systems software engineer with expertise in applied cryptography, peer-to-peer networks, distributed systems, open-source software, and cryptocurrency protocols. Your responsibilities will include enhancing lnd and neutrino, conducting groundbreaking cryptocurrency research, contributing to the design of BOLT specifications, and helping to shape the future of smart contract applications on Bitcoin.The ideal candidate will possess a deep passion for Bitcoin and a commitment to making Bitcoin transactions more affordable, faster, and user-friendly for everyone.Key Responsibilities:- Develop and implement essential Lightning Network (LN) protocols and algorithms.- Contribute to critical peer-to-peer cryptocurrency daemons, primarily using Go.- Collaborate with the broader team on researching and designing future versions of LN.- Engage in issue triage and review open-source contributions across our repositories.- Communicate effectively with the larger community and industry about our software and technology.

At Dragos, we are driven by our unwavering commitment to safeguarding industrial organizations that are essential to modern civilization, such as those providing clean water, reliable electricity, and secure industrial workplaces. As the frontrunner in ICS/OT Cybersecurity, we empower our clients with top-tier technology, threat intelligence, and services to effectively and efficiently protect their systems. Embracing a remote-first culture, our operations span North America, Europe, the Middle East, and APAC. We are in search of mission-driven individuals who exemplify our core values of authenticity, transparency, and trust. Are you prepared to make a significant impact? Join us in a mission that has the potential to change the world!About the Role: We are looking for an experienced Staff Protocol Dissection Engineer to join our innovative team. In this pivotal role, you will be tasked with dissecting and analyzing various communication protocols, engaging with clients to identify their needs, rapidly prototyping solutions, and collaborating with cross-functional teams, including product development, reverse engineering, and sales.

Join Our Team as a Protocol SpecialistAt Unit 410, we are passionate about connecting with exceptional talent. Our philosophy is to build a strong team by fostering relationships before the need arises to hire. If you are intrigued by the innovative work we are doing, we would love to hear from you, regardless of whether the timing is right today or in the future.Our team consists of individuals who have contributed to some of the most impactful technologies in the industry, with backgrounds from renowned organizations such as NASA, Google, Coinbase, and Twitter. Frequently, we are at the forefront of the next big breakthrough in cryptocurrency. We actively support early major holders on networks and collaborate directly with founders and CTOs, earning a reputation as industry leaders.At Unit 410, you will experience autonomy and be encouraged to pursue your intellectual curiosity. Your contributions can influence not only our company but also the broader cryptocurrency landscape.We want to know what drives you—what challenges you are eager to tackle and the impact you wish to create. If your ambitions align with ours, we will find a way to collaborate effectively.Role OverviewAs a Protocol Specialist, you will identify emerging trends before they become evident and help transform them into tangible realities. You will explore new networks, uncover opportunities, coordinate with leading crypto institutions and protocol teams, and work closely with protocol leadership and our highly technical team to support new initiatives rapidly and effectively.The projects we undertake are characterized by their novelty, combined with our technical prowess that allows us to operate at a scale and speed that few can match. This positions you right at the forefront of the future of cryptocurrency.If you have a knack for analyzing complex systems, diving into validator code, or extracting insights from specification documents, this is your chance to channel that curiosity into meaningful impact.Your ResponsibilitiesClient Support: Collaborate directly with institutions and sophisticated clients engaging with new networks to alleviate challenges, assess risks, and ensure seamless, scalable experiences.Engineering Collaboration: Work alongside Unit 410’s engineering teams to design and implement infrastructure that facilitates participation in emerging protocols.Opportunity Discovery: Identify innovative ways to enhance client support, add value, and drive impactful initiatives across protocols.

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.

Fastly seeks a Staff Software Engineer to focus on Edge Protocols. This position involves designing and building new solutions that enhance the edge cloud platform. The work has a direct impact on performance, scalability, and the experience of clients worldwide. Role focus This role centers on developing protocols and systems that support Fastly's edge infrastructure. Engineering decisions here shape how data moves efficiently and reliably across the platform. Impact Solutions built in this role influence the speed and reliability of Fastly's services. Engineers in this area help ensure clients around the globe receive consistent, high-quality performance. Locations Denver, CO New York City, NY San Francisco, CA

Join our dynamic team at Lightning Labs as an Assets Protocol Engineer! We are seeking a talented systems software engineer with extensive experience in applied cryptography, peer-to-peer networking, distributed systems, open source software, and cryptocurrency protocols, particularly Bitcoin. This pivotal role focuses on the design, implementation, and continuous evolution of the Taproot Assets Protocol (TAP).As an ideal candidate, you should possess a robust understanding of the core Bitcoin protocol and be familiar with proposed updates aimed at enhancing smart contracting capabilities, as well as established standards like Partially Signed Bitcoin Transactions (PSBTs). A genuine passion for Bitcoin and a commitment to simplifying its use for everyone is essential.

Are you ready to revolutionize connectivity from space, making it universally accessible, secure, and actionable? Look no further!E-Space is at the forefront of connecting Earth and space, enabling large-scale deployments of Internet of Things (IoT) solutions and services. Our innovative low Earth orbit (LEO) space system aims to transform the design, economics, manufacturing, and service delivery associated with traditional satellite and terrestrial IoT systems.We pride ourselves on our intentionality, curiosity, and unwavering commitment to innovating space-based communications. Our mission is to deliver actionable intelligence that expands global economies, protects our planet, and enhances overall quality of life.We are looking for a seasoned Wireless Communication Protocols and Networking Engineer to lead the design, implementation, and optimization of MAC and network layer protocols for cutting-edge wireless networking systems. This role is crucial for ensuring reliable, high-performance communication across our wireless infrastructure. A robust background in wireless networking is essential, and extensive experience with 5G protocols is highly desirable.In this role, you will architect and implement resilient MAC and network layer protocols while ensuring seamless integration with lower physical layers and upper application services. Collaboration with cross-functional teams will be key in developing, testing, and validating protocol solutions that support advanced wireless communication systems, including emerging 5G technologies.This position reports directly to the Senior Director of Product and System Integration and is located in our Saratoga, CA office.

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 our Corporate Technology Strategy Group, where we spearhead the innovation of Client technologies at the corporate level. Our team is dedicated to research and collaboration on groundbreaking business solutions and technologies. We are seeking skilled individuals to work on advanced networking technologies that are fueled by emerging applications such as IoT, AI, and VR/AR/MR.

Galaxy Digital Services stands at the intersection of digital asset innovation and advanced data center infrastructure. The company’s platform spans trading, investment banking, asset management, staking, self-custody, and tokenization, while also investing in infrastructure that supports AI and high-performance computing. With a presence across North America, Europe, the Middle East, and Asia, Galaxy supports institutions, startups, and developers as they navigate the digital economy. Guided by a team with deep cryptocurrency and institutional experience, Galaxy pursues a vision where blockchain technology transforms the global flow of value. The company operates under a mission-driven culture that values excellence, selectivity, open disagreement, and independent decision-making. Teams work collaboratively while maintaining high alignment and flexibility. Role overview The Vice President of Protocol Engineering (Validators) leads the Blockchain Engineering Team focused on deploying, securing, and optimizing validator infrastructure across multiple blockchain networks. This group specializes in launching and maintaining validators, ensuring high availability, strong security, and consistent performance to support decentralized networks. What you will do Design, deploy, and manage validator nodes across various blockchain protocols Enhance automation workflows for validator operations Monitor network performance and optimize for reliability and efficiency Implement security measures to protect validator infrastructure Collaborate with blockchain protocols, foundations, staking platforms, and other stakeholders to drive operational excellence and innovation Our values Pursue Excellence Be Selective to Achieve Effectiveness Maintain High Alignment with Flexible Collaboration Disagree Openly Foster Independent Decision-Making Create Dream Teams Galaxy Digital Services is headquartered in New York City with remote opportunities available across the US. More about the company and its products can be found at www.galaxy.com.

Join our innovative team at stemxpert1 as an Embedded Software Engineer specializing in MOST Protocols. In this role, you will be responsible for designing, developing, and optimizing embedded software solutions that enhance our product offerings.You will collaborate with cross-functional teams to drive projects from conception to deployment, ensuring high-quality results and adherence to industry standards.