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Location: Remote - Worldwide About us OpenZeppelin is the security standard onchain finance is built on. Founded in 2015, our mission is to accelerate the world's transition to an open financial system, built on open standards and secured by rigorous research. Our open-source Contract Libraries have facilitated over $35 trillion in onchain value and are used by 10 of the top 10 tokenized money market funds and 9 of the top 10 stablecoins by market cap. We combine AI-native security tooling with deep research and a decade of audit expertise to support leading institutions and crypto-native teams shaping the next generation of digital assets like DTCC, Fidelity, Coinbase, Uniswap, Aave, the Ethereum Foundation, and many more across the full secure development lifecycle. Please note: Always refer to OpenZeppelin's official job page for the most accurate information about our open roles, as we have seen multiple third party job sites posting inaccurate information. The Security Services Team OpenZeppelin's Security Services team is responsible for the security of the world's leading web3 protocols and top financial institutions building onchain. Our researchers partner with client teams across the full lifecycle of a protocol: working on architecture and design before any code is written, co-creating novel mechanisms and primitives with engineering teams, conducting deep audits of pre-launch codebases, and providing continuous coverage as production systems evolve. Our clients range from emerging projects shipping their first contracts to global financial institutions running production onchain systems at scale. What you'll be doing Review smart contracts for top decentralized applications, blockchain infrastructure and financial institutions before they launch. Find vulnerabilities, prioritize them, and present findings to the client. Drive audits independently from start to finish, with AI as your primary collaborator. When useful, partner with another researcher to attack the code together and pressure-test findings. Partner with client teams during the design phase of new protocols, analyzing architecture, trust assumptions, and operational constraints before any code is written (Design Reviews, Applied Research engagements). Use AI efficiently throughout the audit process, and build skills, agents, and workflows that compound across the team. Conduct open-ended research into cutting-edge blockchain technologies, vulnerability classes, and emerging attack vectors, and contribute findings back to OpenZeppelin's internal knowledge base and to the broader ecosystem. You have Hands-on and practical experience in one or more of the following: software development, cybersecurity, applied mathematics, distributed systems, cryptography, cryptoeconomics or game theory, or DeFi mechanisms. Experience designing and developing smart contracts, not only auditing them. Strong working knowledge of Solidity and the broader Ethereum / EVM ecosystem (common libraries, frameworks, smart contract patterns). Modern AI tooling is central to how you work, not a novelty. You use it daily to expand audit coverage, reason about complex systems, and produce high-quality outputs faster. You evaluate AI-generated code with a critical eye. Comfort building and extending your own tooling (skills, agents, prompts, scripts, or full workflows) that the rest of the team can adopt and build on. An advanced English level and strong communication skills (oral and written). Nice to have Experience with non-EVM ecosystems and languages, such as Canton, Move (Sui, Aptos), Golang (Cosmos SDK), Cairo (Starknet), Rust-based blockchains (Solana, Stellar), or ZK circuits and cryptography-heavy systems. Experience with risk assessment work in the crypto industry (smart contract risk assessment, threat modeling). Working hand-in-hand with protocol teams on co-creative engagements, helping design, specify, and implement smart contracts alongside the research. Web2 security expertise (penetration testing, web application security, infrastructure security, or appsec). Experience with formal verification, invariant testing, or advanced fuzzing tools (Echidna, Foundry, Halmos, Certora). A track record in audit contests (Code4rena, Sherlock, Cantina) or bug bounty platforms (Immunefi, HackerOne). Public security research output, such as published findings, blog posts, conference talks, or contributions to open-source security tooling. Logistics Our interview process takes place on Google Meet and tends to consist of the following stages: Recruiter call (30 minutes) Manager interview (60 minutes) Technical interview (60 minutes) Paid work trial (paid code review assessment) Reference checks Please let us know if you require any accommodations for the interview process, and we’ll do our best to provide assistance. Benefits Meet your teammates at company gatherings around the world 😎 Enjoy the flexibility of fully remote work 🌎 Take the time you need with flexible time off 🏝 Grow your family with 8 weeks of paid leave for primary caregivers, 4 weeks for secondary caregivers, and a one-time $3,600 baby bonus 💙 Build your ideal home office with up to $500 in equipment support 🪑 Stay covered with medical insurance 🏥 Keep growing with learning and development opportunities 🧠 Get a monthly stipend for your preferred co-working space 💻 At OpenZeppelin , we are an equal opportunity employer and we value different perspectives. We are committed to building a diverse workforce. This includes but is not limited to gender, race, sexual orientation, religion, national origin and other characteristics that make each one of us unique. In this uniqueness, we find the most value. Come join us! Use of AI as part of the recruiting process As part of OpenZeppelin’s recruitment process, we may use automated tools, including artificial intelligence, to assist in reviewing applications and assessing candidate qualifications. These tools are used to support our People team by identifying relevant skills and experience, and are not used to make decisions solely by automated means. All hiring decisions involve human review. Any personal data provided as part of your application will be processed in accordance with OpenZeppelin’s Data Privacy Notice . If you have questions about this recruitment process or would like to request human review of your application, please contact us at talent@openzeppelin.com.

Location: Portland, Oregon Workplace: hybrid About the Opportunity: IDT’s Retail division is looking for an energetic, hybrid Retail Account Manager (RAM). In this role, you won't just manage a route—you will be a growth partner for small businesses. You will drive revenue by selling our flagship National Retail Solutions (NRS) portfolio—including Point-of-Sale (POS) systems, credit card merchant services, and cash advances—while simultaneously managing and expanding our traditional telecom and financial services products (Boss Revolution) within your territory. This role balances the thrill of direct, consultative sales with the stability of consistent account management. In this role, you will: Drive NRS Product Sales: Prospect, pitch, and close sales for NRS Point-of-Sale (POS) devices, Merchant Services, and Cash Advances to new and existing retail accounts. Manage an Assigned Route: Develop and execute a weekly cycle to visit retail stores on a regular basis, ensuring high customer satisfaction and identifying upsell opportunities. Open New Retail Doors: Actively prospect and go door-to-door to expand IDT and NRS presence in your territory. Onboard & Support Customers: Drive the merchant application process, help store owners understand how to use our services effectively, and provide light troubleshooting/tech support on equipment. Handle Operations & Inventory: Manage sales, cash/payment collections, and telecom card inventory using IDT's accounting system. What we are looking for: Experience: 1–2 years of experience in retail sales, outside sales, or customer-facing roles. Prior exposure to Merchant Services, POS implementation, or route sales is a major plus. Language: Bilingual professionals with fluency in both English and Spanish are highly preferred to support our diverse customer base. Mobility: Must have a valid driver's license, a reliable car, and a willingness to travel door-to-door within your assigned territory daily. Tech Savvy: Comfortable using basic MS Office, CRM tools, tablets, and Bluetooth equipment. Traits: A resilient "people person" with sharp attention to detail, strong presentation skills, and the ability to multitask in a fast-paced entrepreneurial environment. We offer you: Competitive Base Salary + uncapped commission structure. Comprehensive mileage and gas reimbursement program. Paid on-the-job training on both NRS tech products and IDT telecom services. Excellent benefits package (Medical, Dental, Vision, Life Insurance, 401k with employer match, and PTO). At IDT, we understand the challenge of being apart from those who matter most. Communicating, transferring money, and mobile phone service must be safe, simple, and affordable. Our flagship brand, Boss Revolution, which includes our International Calling, Mobile Top Up, and Money Transfer services, as well as our Boss Revolution Mobile, net2phone, National Retail Solutions, IDT Express, and IDT Carrier Services divisions all, support IDT’s mission of enabling our customers to keep in touch and share resources with their friends and family around the world.   IDT is listed on the NYSE, employs over 1800 people across 20+ countries, and has revenues in excess of $1.5 billion. Since 1990, IDT Telecom has remained a pioneer in Prepaid VoIP and UCaaS telephony. Today, we are an industry leader in prepaid communication and payment services and are one of the world's largest international voice carriers.   Our National Retail Solutions brand provides a sales management system and POS equipment for small and medium-sized businesses. With the help of NRS, business owners can address a management problem: the product integrates advertising, data analysis, and payment processing. Company: IDT Corporation / National Retail Solutions (NRS) Location: [Insert Territory/Location] Compensation: Competitive Base Salary + Commissions + Mileage/Gas Reimbursement & Full Benefits

Location: Home Based - Shenzhen, China Role Summary Ubuntu is the most widely used Linux for innovation from cloud to connected device. Our growing team of IoT field engineers help customers deliver sophisticated IoT products and services across a wide range of industries - from autonomous vehicles to refrigeration solutions. Field engineers carry a significant responsibility - helping customers understand the range of silicon and board options, helping them deliver their unique applications, and helping them ensure the security of critical infrastructure. Our team hires software engineers with experience in the full stack of Linux from firmware to GUI. We represent Canonical and its capabilities to some of the most important companies in the world. Our customers have tremendously varied goals - from mission critical and very expensive machines to tiny and low-cost things. We aim to bring the right insights at each stage of the process and to help these customers make effective choices. Most importantly, we aim to help them deliver devices that meet their business goals, on time. Responsibilities include consulting, developing, demonstrating, and presenting some of the most advanced operating systems and application technologies available in the enterprise world. The role is a fast-paced, problem-solving environment and the questions require answers can be challenging yet very exciting. The right candidate must be resourceful, quick-thinking, and able to deliver on a wide variety of solutions across cloud, server, desktop and IoT technologies. This role will support customers in China and the broader Asia-Pacific market. Key Responsibilities and Accountabilities Build strategic relationships with key technology partners and customers Conduct yourself as a trusted technical advisor Apply expertise in analysing a customer's business or technical challenges and correctly map the appropriate solution Leverage deep knowledge of Ubuntu and related technologies to provide technical subject matter expertise to sales staff, partners, and customers for the development and implementation of complex IoT products and end-end solutions Work in conjunction with Canonical’s IoT and Cloud sales, delivery and business development teams to grow existing customer accounts as well as winning new customers, including the interaction with other offices in APAC (Taipei, Tokyo and Beijing). Develop and present technical sales collateral such as presentations, how-to guides, and technical competitive documents to project teams. Propose and present custom technical solutions to Canonical’s clients and partners based upon Ubuntu technologies such as Ubuntu Core, Snaps and other Canonical technologies. Understand and champion the technical knowledge and product skills required to meet customer requirements and close new business. Assist in coordinating and preparing responses to RFx documents. Based in Shenzhen, travel required; mix of domestic and international up to 30%. Required Skills and Experience A degree in engineering, preferably computer science or software engineering 2 years experience in enterprise or commercial software development with Linux Excellent communication and presentation skills - both to customers and in support of technology and industry conferences. Skills in supporting complex sales cycles what involve detailed technical requirements, multiple technical stakeholders and new innovative product designs. Ability to interpret customer business challenges and technical issues and effectively communicate how a solution will align to their needs and requirements. Experience of deploying embedded and IoT solutions - from hardware, operating systems through applications and cloud services. Understanding of security issues in the IoT industry. Understanding of the Linux kernel: modules, BSPs, etc. Familiarity with x86 and ARM SoC architectures and vendors. Experience of working in verticals such as automotive, robotics, gateway, networking, industrial and digital signage. 5+ years of experience in technical roles with Linux, preferably Ubuntu Open source & Linux Familiarity with open source development tools and methodology. A strong and demonstrated grasp of Linux technologies including advanced scripting, development and Linux software packaging experience. Familiarity with the licenses and license compliance requirements for open source software. Familiarity with boot loaders and hardware-related aspects of Linux development Strong English and Chinese language communication skills, especially in online environments such as mailing lists and social collaboration tools Ability to be productive in a globally distributed team through self-discipline and self-motivation, delivering according to a schedule. Self-driven personality.

Location: Dallas, Texas 75202 Workplace: hybrid About the Opportunity: IDT’s Retail division is looking for an energetic, hybrid Retail Account Manager (RAM). In this role, you won't just manage a route—you will be a growth partner for small businesses. You will drive revenue by selling our flagship National Retail Solutions (NRS) portfolio—including Point-of-Sale (POS) systems, credit card merchant services, and cash advances—while simultaneously managing and expanding our traditional telecom and financial services products (Boss Revolution) within your territory. This role balances the thrill of direct, consultative sales with the stability of consistent account management. In this role, you will: Drive NRS Product Sales: Prospect, pitch, and close sales for NRS Point-of-Sale (POS) devices, Merchant Services, and Cash Advances to new and existing retail accounts. Manage an Assigned Route: Develop and execute a weekly cycle to visit retail stores on a regular basis, ensuring high customer satisfaction and identifying upsell opportunities. Open New Retail Doors: Actively prospect and go door-to-door to expand IDT and NRS presence in your territory. Onboard & Support Customers: Drive the merchant application process, help store owners understand how to use our services effectively, and provide light troubleshooting/tech support on equipment. Handle Operations & Inventory: Manage sales, cash/payment collections, and telecom card inventory using IDT's accounting system. What we are looking for: Experience: 1–2 years of experience in retail sales, outside sales, or customer-facing roles. Prior exposure to Merchant Services, POS implementation, or route sales is a major plus. Language: Bilingual professionals with fluency in both English and Spanish are highly preferred to support our diverse customer base. Mobility: Must have a valid driver's license, a reliable car, and a willingness to travel door-to-door within your assigned territory daily. Tech Savvy: Comfortable using basic MS Office, CRM tools, tablets, and Bluetooth equipment. Traits: A resilient "people person" with sharp attention to detail, strong presentation skills, and the ability to multitask in a fast-paced entrepreneurial environment. What we offer: Competitive Base Salary + uncapped commission structure. Comprehensive mileage and gas reimbursement program. Paid on-the-job training on both NRS tech products and IDT telecom services. Excellent benefits package (Medical, Dental, Vision, Life Insurance, 401k with employer match, and PTO). About us: IDT is a Communications and Money Transfer company founded in 1990 and headquartered in Newark, New Jersey. IDT is an industry leader in prepaid communication, money transfer, and payment services and one of the world's largest international voice carriers. We are listed on the NYSE, employ over 1800 people across 20+ countries, and have over $1.5 billion in revenues.  Our flagship brand, Boss Revolution, includes Money Transfer, International Calling, and Mobile Top-Up services and supports IDT's mission of enabling people to keep in touch and share resources with family and friends worldwide. Join us! Company: IDT Corporation / National Retail Solutions (NRS) Location: [Insert Territory/Location] Compensation: Competitive Base Salary + Commissions + Mileage/Gas Reimbursement & Full Benefits

Location: Modesto, Ca 95350 Workplace: hybrid About the Opportunity: IDT’s Retail division is looking for an energetic, hybrid Retail Account Manager (RAM). In this role, you won't just manage a route—you will be a growth partner for small businesses. You will drive revenue by selling our flagship National Retail Solutions (NRS) portfolio—including Point-of-Sale (POS) systems, credit card merchant services, and cash advances—while simultaneously managing and expanding our traditional telecom and financial services products (Boss Revolution) within your territory. This role balances the thrill of direct, consultative sales with the stability of consistent account management. In this role, you will: Drive NRS Product Sales: Prospect, pitch, and close sales for NRS Point-of-Sale (POS) devices, Merchant Services, and Cash Advances to new and existing retail accounts. Manage an Assigned Route: Develop and execute a weekly cycle to visit retail stores on a regular basis, ensuring high customer satisfaction and identifying upsell opportunities. Open New Retail Doors: Actively prospect and go door-to-door to expand IDT and NRS presence in your territory. Onboard & Support Customers: Drive the merchant application process, help store owners understand how to use our services effectively, and provide light troubleshooting/tech support on equipment. Handle Operations & Inventory: Manage sales, cash/payment collections, and telecom card inventory using IDT's accounting system. What we are looking for: Experience: 1–2 years of experience in retail sales, outside sales, or customer-facing roles. Prior exposure to Merchant Services, POS implementation, or route sales is a major plus. Language: Bilingual professionals with fluency in both English and Spanish are highly preferred to support our diverse customer base. Mobility: Must have a valid driver's license, a reliable car, and a willingness to travel door-to-door within your assigned territory daily. Tech Savvy: Comfortable using basic MS Office, CRM tools, tablets, and Bluetooth equipment. Traits: A resilient "people person" with sharp attention to detail, strong presentation skills, and the ability to multitask in a fast-paced entrepreneurial environment. We offer you: Competitive Base Salary + uncapped commission structure. Comprehensive mileage and gas reimbursement program. Paid on-the-job training on both NRS tech products and IDT telecom services. Excellent benefits package (Medical, Dental, Vision, Life Insurance, 401k with employer match, and PTO). At IDT, we understand the challenge of being apart from those who matter most. Communicating, transferring money, and mobile phone service must be safe, simple, and affordable. Our flagship brand, Boss Revolution, which includes our International Calling, Mobile Top Up, and Money Transfer services, as well as our Boss Revolution Mobile, net2phone, National Retail Solutions, IDT Express, and IDT Carrier Services divisions all, support IDT’s mission of enabling our customers to keep in touch and share resources with their friends and family around the world.   IDT is listed on the NYSE, employs over 1800 people across 20+ countries, and has revenues in excess of $1.5 billion. Since 1990, IDT Telecom has remained a pioneer in Prepaid VoIP and UCaaS telephony. Today, we are an industry leader in prepaid communication and payment services and are one of the world's largest international voice carriers.   Our National Retail Solutions brand provides a sales management system and POS equipment for small and medium-sized businesses. With the help of NRS, business owners can address a management problem: the product integrates advertising, data analysis, and payment processing. Company: IDT Corporation / National Retail Solutions (NRS) Location: [Insert Territory/Location] Compensation: Competitive Base Salary + Commissions + Mileage/Gas Reimbursement & Full Benefits