MastercardSoftware Engineer II - Blockchain
Mastercard is hiring a Software Engineer II - Blockchain in Arlington, United States. Level rates it ; you can apply on Mastercard.
Level's read on this job
- Level rates this software engineer role Little AI ●○○○: aI is not part of the work.
- The posting mentions Ethereum, Evm and Web3 among its tools and skills.
- Level classes it as a mid-level role.
- Mastercard has 967 other open roles on Level.
AI in this role
Build blockchain and Web3 applications while occasionally interacting with AI tools and agentic systems in a hybrid role.
Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
Title and Summary
Software Engineer II - BlockchainOverview:Mastercard is looking for a talented Software Engineer II - Blockchain to join the Mastercard Blockchain and Digital Assets Engineering team. In this role, you will be part of a highly collaborative Agile team building innovative, scalable products leveraging blockchain technologies and components for global markets.
You will work alongside experienced engineers to design, develop, test, and support Ethereum/EVM and Web3 solutions, contributing to enterprise-grade applications with a focus on scalability, security, reliability, and performance.
Our team is built on a foundation of research and development, innovation mentality, thinking through new product lines using Blockchain / Distributed ledger technology, managing new products from inception to market validation and engaging strategically with start-ups to shape the future of commerce within the digital assets space with and for our customers. At Mastercard you will help architect and lead the future of commerce globally.
This team will have a major focus on adopting Blockchain technology to bring innovative payment solutions to market. Engineers on this team will also have the opportunity to work alongside cutting-edge AI tools and agentic systems as part of our broader innovation agenda.
This is a hybrid role based in Arlington, VA, requiring three days per week onsite.
Role:
• Develop, test, deploy, and maintain blockchain applications, smart contracts, and Web3 integrations within the Ethereum/EVM ecosystem.
• Collaborate with senior engineers, architects, and product teams to deliver secure, scalable, and reliable solutions.
• Participate in technical design discussions and contribute ideas to address business and technical challenges.
• Translate business requirements into high-quality code aligned with engineering standards and best practices.
• Participate in code reviews, testing activities, and development processes to ensure software quality and maintainability.
• Work closely with product, compliance, security, and engineering teams throughout the software development lifecycle.
• Troubleshoot and resolve issues in development, test, and production environments.
• Contribute to improving engineering processes, automation, tooling, and development practices.
• Develop and support applications running in cloud-native, containerized environments.
• Follow secure coding practices and operational excellence standards throughout development and delivery.
All About You:
• Experience as a Software Engineer, Software Developer, or similar engineering role.
• Experience developing applications using Ethereum/EVM and Web3 technologies such as ethers.js, web3.js, or similar frameworks.
• Working knowledge of Solidity and experience developing or maintaining smart contracts.
• Understanding of blockchain fundamentals, including transactions, wallets, gas concepts, and common security considerations.
• Familiarity with smart contract development frameworks such as Hardhat, Foundry, or similar toolchains.
• Knowledge of software engineering principles, object-oriented programming, and modern development practices.
• Experience with programming languages such as Java, TypeScript, JavaScript, or similar technologies.
• Familiarity with source control systems such as Git and collaborative software development practices.
• Experience building or maintaining automated unit and integration tests.
• Exposure to containerization technologies such as Docker and cloud-native development concepts.
• Familiarity with CI/CD pipelines and automation tools.
• Ability to learn new technologies quickly and contribute effectively in a fast-paced Agile environment.
• Strong problem-solving, communication, and collaboration skills.
• Commitment to code quality, maintainability, security, and continuous improvement.
• Bachelor's degree in Computer Science, Engineering, Information Systems, or equivalent practical experience.
Preferred Qualifications:
• Experience with enterprise blockchain platforms such as Hyperledger Besu, Quorum, or Canton.
• Familiarity with Layer 2 scaling technologies, including Polygon, Arbitrum, or Optimism.
• Knowledge of smart contract security practices and common vulnerability patterns.
• Familiarity with non-EVM blockchain ecosystems such as Solana.
• Experience with Java and frameworks such as Spring or Spring Boot.
• Familiarity with TypeScript and frontend frameworks such as React or Angular.
• Exposure to AI-powered developer tools, LLM integrations, or agentic development frameworks.
• Experience developing applications in cloud environments such as AWS, Azure, or Google Cloud.
This role is not eligible for Mastercard’s work authorization sponsorship. As such, candidates must be eligible to work in the United States, now as well as in the future, without employer sponsorship.Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact reasonable_accommodation@mastercard.com and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.
Corporate Security Responsibility
All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:
Abide by Mastercard’s security policies and practices;
Ensure the confidentiality and integrity of the information being accessed;
Report any suspected information security violation or breach, and
Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.
Pay Ranges
Arlington, Virginia: $106,000 - $169,000 USDHow we rate this
Software Engineer II - Blockchain at Mastercard rates 20 out of 100 for how much of the daily work is AI. That makes it Little AI (AI Level 1 of 4). The level is about AI in the job, not seniority.
Little AI. AI is not part of the work.
- ●●●● Builds AI80 to 100
- ●●●○ Works on AI60 to 79
- ●●○○ Uses AI40 to 59
- ●○○○ Little AI0 to 39
Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.
Prepare for this job
Built from this posting and from similar jobs on Level.
Skills and AI tools this role asks for
Pay
- Typical software engineer job
- $167k
This posting doesn't list pay. Use the typical software engineer figure when pay comes up. See software engineer jobs
Questions you could be asked
- How have you integrated a large language model into a production application?
- Tell me about a project where blockchain was part of your work. What did you do?
- Tell me about a project where smart contracts was part of your work. What did you do?
- Tell me about a project where distributed ledger was part of your work. What did you do?
- Tell me about a project where agile was part of your work. What did you do?
Adapt your resume
- List these exact terms on your resume: LLM Integration, Blockchain, Smart Contracts, Distributed Ledger, and Agile. An applicant tracking system matches the wording, not the idea.
- Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
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