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🔥 Lead Security Engineer - Blockchain Security

Posted about 4 hours ago

📍 Brazil

🔍 Blockchain Security

🏢 Company: Nubank👥 5001-10000💰 $265,100,000 Post-IPO Debt about 2 years agoCredit Cards Financial Services Banking FinTech

🔧 Requirements

Offensive Security background, with a focus on blockchain security activities.
Knowledge of cryptocurrency and blockchain technologies, including consensus algorithms, cryptographic protocols, and smart contracts.
Experience with security tools and techniques, such as penetration testing, vulnerability scanning, and incident response.
Experience with security frameworks, such as OWASP, NIST Cybersecurity Framework (CSF), etc.
Scripting or programming skills (Python, Shell script, Clojure, etc.) to automate data gathering, attack scenarios and analysis tasks.
Strong knowledge of recent and past attack vectors, as well as exploitations, and how to fix them.
Familiarity with AWS general concepts;
General knowledge in all security scopes, as well as strong knowledge on Operating Systems, Networks, Databases and Infrastructure Architecture;
Ability to work autonomously and proactively to co-create solutions with the team.
Problem-Solving: Excellent analytical skills with the ability to assess complex security issues and develop effective solutions.
Strong verbal and written communication skills to articulate complex security concepts to technical and non-technical stakeholders in spoken and written English.

💡 Responsibilities

Utilize your offensive security skills to identify vulnerabilities and simulate attacks, providing insights into potential security threats and helping implement effective mitigation strategies.
Implement and maintain cutting-edge security measures specific to blockchain technology, including smart contract security audits, cryptographic techniques, and consensus mechanism evaluation. This includes implementing monitoring and control mechanisms, conducting security assessments, and identifying and mitigating vulnerabilities.
Collaborate with product and engineering teams to design secure blockchain infrastructures. Contribute to the architecture and development of secure systems, ensuring best practices in security by design.
Contributing to the development of security policies, standards and guidelines governing the security operations of blockchain products.
Develop and deploy real-time monitoring tools to detect and respond to security incidents. Optimize control mechanisms to ensure rapid identification and resolution of security issues.
Staying up-to-date on the latest security threats and best practices in the cryptocurrency and blockchain space: This includes researching new technologies, attending industry conferences, and collaborating with other security professionals.
Mentoring a team of security engineers: This involves providing guidance, training, and support to ensure the team is performing at its best.
Collaborating with other teams within Nubank: This includes working with product managers, developers, and operations teams to ensure the security of cryptocurrency and blockchain products is a top priority.

AWS Python Blockchain Cybersecurity Ethereum REST API Mentoring Linux JSON Scripting

Posted about 4 hours ago

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🔥 Security Engineer: DeFi

Posted 1 day ago

📍 AMER, EMEA

🧭 Full-Time

🔍 Security Engineering

🏢 Company: asymmetric.re

🔧 Requirements

Strong desire to understand how things work, and the ability to quickly absorb new information.
Strong familiarity with multi-chain messaging protocols and asset bridging.
Proven experience as a consultant, engineer, bug bounty hunter or auditor.
Prior experience working with open source development practices.
Willingness and aptitude to work with multiple runtimes including EVM, SVM, NEAR, Cosmos & Move.
Experience with reverse engineering and/or fuzzing.
Experience with code reviews.
Prior leaderboard ranking on bug bounty platforms or strong performance in code contests or CTF competitions.

💡 Responsibilities

Design and implement security and defense-in-depth controls to prevent and limit vulnerabilities.
Develop security tooling and developer workflows to aid in the early detection of vulnerabilities.
Collaborate with core contributors to conduct internal security audits.
Shepherd external security audits with the help of leading 3rd party audit firms.
Operate a leading bug bounty program on Immunefi.
Develop monitoring software and custom detectors to ensure the integrity of on-chain protocols.
Conduct on-chain investigations to determine the root cause of potential incidents.
Collaborate with core contributors to reduce supply-chain risk.
Work in a diverse decentralized team environment with web3 professionals.
Clearly communicate security risks and solutions.
Adhere to the highest standards of integrity, trust, and professionalism.

Blockchain Cybersecurity Ethereum Web3.js Scripting

Posted 1 day ago

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🔥 Senior DevOps Engineer

Posted 2 days ago

📍 Europe

🧭 Contract

🔍 Blockchain

🏢 Company: CoW DAO

🔧 Requirements

Deployed and maintained production-grade K8s clusters before
Strong experience with AWS, CI/CD, Docker, and Linux
Experience running Ethereum nodes (or other blockchain infra) is needed
Comfortable handling incidents and making sure things don’t break (or fixing them fast if they do!)
Experience with Prometheus, Grafana, and Elasticsearch
Written production-level code in Python, Go, Rust, or similar for at least 1-2 years

💡 Responsibilities

Build, maintain, and optimize our Kubernetes workloads while ensuring scalable, resilient cloud infrastructure using Infrastructure-as-Code
Automate deployments, reduce tech debt, and optimize AWS costs to improve infrastructure efficiency
Drive CI/CD workflow standards, contribute to platform architecture & security, and enhance on-call and postmortem processes to foster a strong DevOps culture
Deploy and manage Ethereum nodes & validators, establish SLAs, and ensure high availability across our network
Collaborate, mentor, and even lead a small presentation for the team
Modify and extend Pulumi configurations for AWS, fine-tune deployments, and continuously improve alerting solutions
Improve logging architecture, security measures, and database health to ensure reliable infrastructure performance

AWS Docker PostgreSQL Python Blockchain Cloud Computing ElasticSearch Ethereum Kubernetes Nginx Go Grafana Prometheus Rust CI/CD Linux DevOps Ansible Scripting

Posted 2 days ago

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🔥 Senior Product Manager - MetaMask (Portfolio + Mobile)

Posted 2 days ago

📍 US, EU

💸 134000.0 - 186000.0 USD per year

🔍 Fintech

🔧 Requirements

5+ years of product management experience. You have driven products from discovery to launch; aligned teams and stakeholders on a shared vision tied to larger strategy; orchestrated cross-functional teams of analysts, designers, and engineers; facilitated user research or experiments to validate hypotheses; used metrics and feedback to drive development; shipped highly technical products in a fast moving environment.
2+ years of experience working on consumer products in crypto or the financial sector.

💡 Responsibilities

Define vision, strategy, and roadmap, working closely with engineers, designers, analysts, data scientists, and researchers. We expect our product managers to be full stack, working on long term strategies but also working on individual tickets with the team.
Design and deliver crypto products that advance the MetaMask mission.
Research user problems and stay ahead of market developments in Web3 and traditional finance.
Drive adoption of crypto-first product features, working closely with various partners and teams across Web3 and traditional finance.
Shape and define standards for building great consumer products, educate our product teams, and hold the bar across the company.
Grow and lead the work of a cross-functional team (user research, data analytics, technical writing, front end, and API developers) to be user-focused, discovery-led, and data driven as the consumer’s advocate.

Leadership SQL Blockchain Data Analysis Ethereum Full Stack Development Product Management User Experience Design Cross-functional Team Leadership Product Development Product Analytics REST API Web3.js Agile methodologies Strategic thinking A/B testing

Posted 2 days ago

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🔥 Head of Business Development

Posted 2 days ago

📍 United Kingdom, France, Germany, Spain, Portugal

🔍 Crypto, Fintech

🏢 Company: Summer.fi

🔧 Requirements

At least 3 years in Growth, Sales, or Business Development roles within Crypto or Fintech.
Ideally, a strong existing network of potential partners within the Crypto and Fintech sectors.
A solid grasp of Blockchain technology and non-custodial crypto solutions.
Hands-on experience using DeFi platforms (e.g., Maker, Aave, Compound, Yearn, Beefy, ether.fi) and a deep understanding of yield optimization strategies.
Demonstrated success in closing at least one significant deal within the past 18 months.
A self-starter with the drive and resourcefulness to identify and pursue opportunities independently.

💡 Responsibilities

Drive Total Value Locked (TVL) and user acquisition for the Lazy Summer Protocol and for Summer.fi features by securing integrations with CEXs, CeFi platforms, and Fintech companies, enabling their users to access them directly or indirectly.
Work closely with the Engineering team to address technical questions, streamline onboarding and support post-launch improvements.
Develop and maintain comprehensive sales documentation in collaboration with Product and Design teams as needed.
Own and maintain the sales pipeline, ensuring timely follow-ups and clear tracking of progress.
Contribute to setting the Summer.fi short-, medium-, and long-term strategy, aligning with organizational goals and growth initiatives.
Represent Summer.fi at industry events, building relationships and advocating for the Lazy Summer Protocol.

Blockchain Business Development Ethereum Web3.js RESTful APIs Sales experience Financial analysis

Posted 2 days ago

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🔥 Senior Full Stack Engineer, Developer Experience

Posted 3 days ago

📍 Worldwide

🧭 Full-Time

🔍 Software Development

🏢 Company: OP Labs👥 11-50 Developer Tools IT Infrastructure Ethereum Software

🔧 Requirements

Strong background in full stack software engineering with experience building full stack application and APIs (experience building developer tools and/or blockchain applications is nice to have, as is some understanding of JSON-RPC and the EVM).
Comfortable writing in Typescript, Solidity, and Golang or confident that you can pick them up quickly.
History of contribution to open source projects.
A deep interest in improving tools for developers and making the development process easier, more efficient, and more enjoyable.
You should feel comfortable owning the infrastructure part of the application stack (CI/CD, databases, k8s, etc.) when needed, or be willing to learn.

💡 Responsibilities

Build and maintain Developer tooling: Actively contribute to the improvement of our developer tools like supersim and super-cli.
Build and Maintain public API/Services: Build tools like relayers, faucets, and specialized APIs that enable developers to build seamless superchain UX.
Community engagement: Interact with the developer community to gather feedback and share it internally to help drive product enhancements.
Internal collaboration: Work closely with engineering, product, and marketing teams across the organization to align on product specs and requirements and ensure our tools target the right use cases and personas.
Open source contributions: Prefer open source efforts, working in the open to improve the superchain developer experience.

Backend Development Node.js Software Development Blockchain Ethereum Frontend Development Full Stack Development Kubernetes TypeScript REST API CI/CD DevOps Software Engineering

Posted 3 days ago

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🔥 Full-stack Developer (m/f/d)

Posted 6 days ago

📍 Worldwide

🧭 Full-Time

🔍 Web3 Development

🏢 Company: EoT Labs GmbH

🔧 Requirements

3+ years of experience as a Full-stack Developer.
Proven experience working with JavaScript & TypeScript.
Some experience working with Next.js, React.js, and Node.js for fullstack development.
Hands-on experience with blockchain and Web3 development.
Proficiency with Web3.js, Ethers.js, or Viem to interact with smart contracts.
Understanding of Ethereum Virtual Machine (EVM), Solidity, and smart contract development.
Experience working with ERC-20 tokens, NFTs (ERC-721, ERC-1155), and DeFi protocols.
Backend experience with Express.js, Nest.js, or similar frameworks.
Familiarity with IPFS, The Graph, Moralis, or Alchemy for blockchain data access.
Strong understanding of security best practices in Web3 applications.
Experience with databases such as PostgreSQL, MongoDB, or Firebase.
Version control with Git/GitHub and CI/CD pipelines.

💡 Responsibilities

Develop and maintain Web3 applications using Next.js (frontend) and Node.js (backend).
Build decentralized applications (dApps) that integrate with smart contracts.
Work with Ethereum, Polygon, and other blockchain networks to interact with smart contracts using Web3.js, Ethers.js, or Viem.
Implement and integrate ERC-20, ERC-721 (NFTs), and ERC-1155 token standards.
Optimize frontend and backend performance for scalability, security, and usability.
Build robust APIs and services using RESTful APIs and GraphQL.
Collaborate with blockchain engineers, designers, and product teams to create seamless user experiences.
Write clean, modular, and well-documented code following SOLID principles and Web3 best practices.
Stay updated with the latest trends in Web3, blockchain development, and smart contract integration.

GraphQL Node.js PostgreSQL Blockchain Ethereum Express.js Full Stack Development Git Javascript MongoDB React.js TypeScript Firebase Nest.js Next.js Web3.js CI/CD RESTful APIs

Posted 6 days ago

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🔥 Distributed Systems Engineer - Web3

Posted 7 days ago

📍 United States, Canada

🔍 Software Development

🏢 Company: Career Renew

🔧 Requirements

Experience with container orchestration systems, particularly Kubernetes.
Strong programming skills in Rust
Strong knowledge of monitoring and observability tools such as Prometheus and Grafana.
Proven experience in designing and building distributed systems, including peer-to-peer software and applications.

💡 Responsibilities

Architect, maintain, and build the infrastructure and services that power our EVM rollup solutions.
Design and implement comprehensive monitoring and observability solutions using tools like Prometheus and Grafana.
Deploy and manage applications in containerized environments using Kubernetes.
Ensure the reliability, scalability, and performance of distributed systems through robust monitoring and alerting.
Collaborate with the entire engineering team to ensure a seamless developer experience across all protocol components.
Implement CI/CD pipelines for efficient deployment and testing of services.
Contribute to the development and maintenance of foundational open-source tools for rollup users.
Troubleshoot and resolve complex system issues, ensuring system efficiency and reliability.

Docker Ethereum Kubernetes Grafana Prometheus Rust Web3.js CI/CD

Posted 7 days ago

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🔥 Business Development Manager (Payments) APAC

Posted 7 days ago

📍 Hong Kong

🧭 Full-Time

🔍 Blockchain, Fintech, Payments

🏢 Company: Polygon Labs

🔧 Requirements

3 - 5+ years in business development within blockchain, fintech, payments, or institutional finance, with a strong track record in closing strategic partnerships.
Deep understanding of stablecoins, real-world asset tokenization (RWA), DeFi, and financial applications in Asia.
Strong ability to engage, negotiate, and collaborate with institutions across fintech, banking, and blockchain.
Thrives in a fast-paced, high-autonomy environment with minimal oversight.
Capable of articulating Polygon’s product suite to institutional partners.
Mandarin proficiency is a plus for engaging key stakeholders.
Skilled in CRM tools, data-driven decision-making, and growth strategies for scaling partnerships.
Collaborative mindset to support Polygon’s global teams and drive web3 adoption in payments.

💡 Responsibilities

Identify, engage, and close high-impact partnerships with banks, fintech companies, stablecoin issuers, and enterprises in APAC.
Develop and execute a pipeline of strategic business opportunities that position Polygon as the go-to blockchain for payments.
Drive relationships with centralized exchanges across APAC to enhance liquidity and on/off-ramp capabilities.
Work with Polygon’s Enablement Team to expand the APAC ecosystem and onboard key players.
Own and deliver on quarterly business development targets while providing regular progress reports to leadership.
Work closely with the APAC leadership team to strengthen relationships with key stakeholders in the region.
Act as a key liaison for existing strategic partnerships, ensuring they align with Polygon’s long-term growth strategy.
Engage with Polygon’s RWA, DeFi, and enterprise teams to maximize adoption across different financial verticals.
Represent Polygon at high-profile industry events, conferences, and roundtables, leveraging your network to close deals.
Work cross-functionally with marketing, developer relations, and product teams to accelerate payments adoption on Polygon.
Gather insights from dApps, fintech firms, and institutions to enhance Polygon’s payments strategy and improve user experience.
Lead strategic initiatives to educate partners on the advantages of Polygon’s payments infrastructure.
Assist in marketing campaigns, exclusive networking dinners, and APAC ecosystem events to foster deeper engagement.

Blockchain Business Development Ethereum API testing Web3.js Communication Skills Analytical Skills RESTful APIs Negotiation Presentation skills Relationship building JSON Cross-functional collaboration Sales experience Market Research Strategic thinking CRM Financial analysis

Posted 7 days ago

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🔥 Senior Product Counsel

Posted 9 days ago

📍 United States

🧭 Full-Time

💸 180000.0 - 255000.0 USD per year

🔍 Fintech

🏢 Company: Phantom👥 51-100💰 $109,000,000 Series B about 3 years agoCryptocurrency Ethereum Bitcoin FinTech

🔧 Requirements

JD and active member of at least one state bar
5+ years of legal experience, with in-house experience at a financial services, fintech or crypto company preferred
Interest in digital assets, web3 and DeFi and a curiosity around new and innovative financial technologies
Experience with financial services and consumer protection regulations (State MTLs, Reg E, UDAP, ‘33 Act, ‘34 Act, CEA)
Excellent judgment and communications skills and the ability to translate legal advice into actionable guidance.

💡 Responsibilities

Provide full product life-cycle counseling to teams developing innovative crypto-native payments products.
Ensure compliance with applicable global regulations and provide strategic advice to stakeholders.
Draft Terms of Service; draft and negotiate a wide range of commercial and partnership agreements.
Monitor legal and regulatory developments and consider their impact on Phantom

Blockchain Ethereum Web3.js RESTful APIs Compliance

Posted 9 days ago

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