Software Engineer II - Blockchain
Mastercard6 days ago
Arlington, VA, USAMid Level
Base Salary
$106k - $169k/yr
Responsibilities
- Develop, test, deploy, and maintain blockchain applications, smart contracts, and Web3 integrations in the Ethereum/EVM ecosystem.
- Collaborate with engineers, architects, product, compliance, security, and other teams to deliver secure, scalable, reliable, and performant solutions.
- Translate business requirements into maintainable, high-quality code and contribute to technical designs, code reviews, testing, and development practices.
- Troubleshoot issues across development, test, and production environments.
- Improve engineering processes, automation, tooling, and development practices.
- Develop and support applications in cloud-native, containerized environments while following secure coding and operational excellence standards.
Requirements
- Experience as a software engineer, software developer, or in a similar engineering role.
- Experience with Ethereum/EVM and Web3 technologies such as ethers.js or web3.js, plus working knowledge of Solidity and smart contract development.
- Understanding of blockchain fundamentals including transactions, wallets, gas concepts, and common security considerations.
- Familiarity with Hardhat, Foundry, or similar smart contract development toolchains.
- Knowledge of software engineering principles, object-oriented programming, modern development practices, Git, automated unit and integration testing, Docker, and cloud-native development.
- Experience with Java, TypeScript, JavaScript, or similar technologies.
- Bachelor’s degree in Computer Science, Engineering, Information Systems, or equivalent practical experience.
- Preferred qualifications include experience with Hyperledger Besu, Quorum, Canton, Polygon, Arbitrum, Optimism, Solana, Spring, Spring Boot, React, Angular, AWS, Azure, or Google Cloud, as well as smart contract security, AI-powered developer tools, LLM integrations, or agentic development frameworks.
Benefits
- Hybrid work arrangement in Arlington, Virginia, requiring three days onsite per week.
- Full-time benefits generally include medical, prescription drug, dental, vision, disability, and life insurance; flexible spending and health savings accounts; paid leave; 401(k) matching; fitness reimbursement or onsite fitness facilities; tuition reimbursement; and paid holidays.
- Paid leave includes 16 weeks of new parent leave, up to 20 days of bereavement leave, 80 hours of paid sick and safe time, 25 vacation days, and five personal days, prorated based on hire date.
- The posting states that Mastercard intends to fill the position by December 15, 2026.
Tech Stack
Categories
About Mastercard
Mastercard builds and operates a global payments network used by banks, merchants, fintechs, and governments, offering card processing, real-time payments, tokenization, and fraud/risk services. It generates revenue from transaction processing and assessment/service fees across more than 200 countries and territories. Founded in 1966 and headquartered in Purchase, New York, Mastercard is a public company listed on the NYSE (ticker: MA).