Software Engineer II - Blockchain
$106k - $169kMastercard
Software Engineer II - Blockchain
Overview:
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.
• 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 View email address on decentrajobs.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.
In line with Mastercard’s total compensation philosophy and assuming that the job will be performed in the US, the successful candidate will be offered a competitive base salary and may be eligible for an annual bonus or commissions depending on the role. The base salary offered may vary depending on multiple factors, including but not limited to location, job-related knowledge, skills, and experience. Mastercard benefits for full time (and certain part time) employees generally include: insurance (including medical, prescription drug, dental, vision, disability, life insurance); flexible spending account and health savings account; paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave); 80 hours of Paid Sick and Safe Time, 25 days of vacation time and 5 personal days, pro-rated based on date of hire; 10 annual paid U.S. observed holidays; 401k with a best-in-class company match; deferred compensation for eligible roles; fitness reimbursement or on-site fitness facilities; eligibility for tuition reimbursement; and many more. Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty leave; and on-site fitness facilities in some locations.
Pay RangesArlington, Virginia: $106,000 - $169,000 USD
$69.55k - $125.73k
Leidos is seeking a Software Engineer II to support the U.S. Department of Justice (DOJ), Office of Justice Programs (OJP), Office of the Chief Information Officer (OCIO) in improving, maintaining, testing, and supporting secure, reliable, accessible, and user-centered...SuggestedWork at office$143.7k - $194.4k
...team is looking for a passionate innovative results-oriented Software Developer II to build solutions that make it simpler for our field team... ...Bachelors degree or foreign equivalent in Computer Science Engineering Mathematics or a related field - 3 years of full software...SuggestedFull timeInternshipFlexible hours$126.99k - $141.1k
...platform that empowers residential real estate agents to deliver exceptional service to seller and buyer clients. As a Software Engineer II in the Transaction Journey (TJ) organization you will use your Frontend web expertise to build products that deliver high business...SuggestedMinimum wageWork from homeFlexible hours$102.1k - $202.2k
...rate; our customers are expecting seamless experiences across devices and across local and cloud boundaries. We are seeking a Software Engineer II - Storage and File Systems to help expand innovate and maintain the platform and end user experiences for storage across...SuggestedOngoing contractFull timeLocal areaImmediate start- ...Job Description Description On-site in Washington, DC\n \n \nOur client seeks a Sr. Software Engineer II to design and manage enterprise endpoint security solutions across DoD and IC environments. The role requires deep expertise with Trellix and Windows/Linux...SuggestedPermanent employmentFull time
$106k - $169k
...of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer II Overview: Mastercard’s Business Experimentation and Optimization (BE&O) teams within the Services organization is seeking...Full timePart timeImmediate startWorldwideFlexible hours3 days per week- ...think big, embrace challenges and explore new ideas to lead the way for the travel industry. ARC is looking for a talented Software Engineer II to join our team! In this role, you will provide product teams with software development and product delivery support for the...InternshipWork at officeWork from homeFlexible hours
- Software Engineer II Location: Remote/Hybrid - DHS CISA and authorized contractor facilities — 4200 Wilson Boulevard and 4601 N. Fairfax Drive, Arlington, VA 22203. Telework only with Government approval. Work Schedule: Monday through Friday. Security Requirements: Tier...Temporary workFor contractorsCasual workWork at officeRemote workMonday to Friday
- AttainX, Inc. seeks a Web Software Developer II to support DHS CISA’s Critical Infrastructure Collaboration Platform (CICP). The role designs and develops web-enabled software solutions that meet business requirements, including features, UI, code and supporting web infrastructure...Remote job
$100k - $140k
..., responsibilities and activities may change at any time with or without notice Responsibilities We are seeking a Software Engineer II to join our team supporting the FBI. REQUIRED QUALIFICATIONS : Experience At least 2 years of software development...Full timeContract workTemporary workWork at officeLocal areaMonday to FridayWeekend workDay shiftAfternoon shift- ...Web Software Developer IILocation: Remote/Hybrid - DHS CISA, 4200 Wilson Boulevard, Arlington VA 22203 and 4601 N. Fairfax Drive, Arlington... ...Level Clearance.AttainX is seeking a Web Software Developer II to support DHS CISA's Critical Infrastructure Collaboration Platform...Remote workMonday to Friday
- AttainX, Inc. in Arlington, VA is seeking a Web Software Developer II to design, develop, and deploy web-enabled software for DHS CISA’s Critical Infrastructure Collaboration Platform. You will engage users, implement UI components, and collaborate with administrators,...Remote job
$152.5k - $205k
Senior Software Engineer Circle is one of the world's leading internet financial platform companies, building the foundation of a more open... ...digital assets, payment applications, and programmable blockchain infrastructure. Circle's platform includes the world's largest...BlockchainPermanent employmentRemote workFlexible hours- Software Systems Engineer Job Locations US ID 2025-4296 Category Defense Type Full Time Overview... ...modern security solutions (e.g., Blockchain or related cryptographic research) Relevant... ...technical authority. Must possess IT-II Non-Critical Sensitive security...BlockchainFull timeTemporary workFor contractorsFlexible hours
$160k - $190k
Senior Software Engineer VIA is making an impact, and so can you. Headquartered in Boston, Massachusetts, VIA is a mission-critical software... ...audiences. Exposure to the following a plus: IETF RFCs, blockchain systems, zero-knowledge proofs What does it take to be a successful...BlockchainSummer workRemote workWork from homeFlexible hours- ...who thrives in an inclusive collaborative global team The Azure Engineering Operations (EngOps) teams mission is to transform Microsoft... ...Azure customer support experience. We are seeking an Applied AI II Engineer to join the team and help build the next generation of...Ongoing contractFull timeLocal area
$102.1k - $202.2k
...looking for highlymotivated SoftwareEngineer II to help us in this mission. We value... ...of highly scalable and reliable software components drive technical strategy and build... ...Responsible Individual (DRI) and guide other engineers by developing and following the playbook...Ongoing contractFull timeLocal area$102.5k - $170.9k
Our AI & Engineering team helps transform technology platforms, drive innovation, and deliver meaningful impact for clients. In this... ...fuel growth through innovation. Work you'll do As a Software Engineer II on the Engineering as a Service team, you will be...Temporary workLocal areaFlexible hours$102.1k - $202.2k
...more openness and sky-is-the-limit thinking in a cloud-enabled world. Within the Azure Monitor team we are looking for a Software Engineer II and Senior Software Engineer to help build and evolve the Azure Monitor backend systems. This role is ideal for someone who...Ongoing contractFull timeLocal area- Software Developer Level II (DOD cleared) Thank you for considering IT Concepts dba Kentro, where innovation drives opportunity and collaboration... ...(s) Conduct unit testing in line with defined quality engineering processes Conduct software development activities in support...Contract work
$132k - $212k
...and services that help people, businesses and governments realize their greatest potential. Title and Summary Senior Software Engineer - Blockchain Overview: Mastercard is looking for a talented Senior Software Engineer - Blockchain to join the Mastercard Blockchain...BlockchainFull timeContract workPart timeWorldwideFlexible hours- ...Job Description Software Specialist II – Deskside Support Technician, Tier II \n Location: Washington, DC — 100% Onsite, 5 days/week \n Client/Program: U.S. Department of Justice (DOJ) – JMD / ESA V \n Clearance: Active Public Trust required \n Start...Work at office
$90.85k - $113.57k
...projects nationwide. Job Description Summary: The Design Engineer II, Substation owns the preliminary substation design and engineering... .... ~ Demonstrated proficiency in electrical design software (AutoCAD, ETAP, or similar). ~ Strong understanding of substation...Contract workFor subcontractorLocal areaRemote work$106k - $169k
...of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Software Engineer II Overview: The Mastercard Economic Intelligence team is seeking a Software Engineer II to help design and build data driven...Full timePart timeImmediate startWorldwideFlexible hours3 days per week$102.1k - $202.2k
...and large-scale data systems to surface actionable insights from collaboration and business signals. Were hiring a Backend Software Engineer II to help deliver intuitive AI-powered experiences that enable customers to understand work patterns optimize collaboration and...Ongoing contractFull timeLocal area$119k
...solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. This Software Development Engineer II role is part of the Distribution and Supply Tech - Inventory Team team which sits within our Technology division. The...$102.1k - $202.2k
...Windows ecosystem by transforming device telemetry and diagnostic signals into actionable insights and engineering improvements. We are seeking a Software Engineer II to build data-driven solutions that reveal how Windows devices behave at enterprise scale in...Ongoing contractFull timeLocal area$117.5k - $157.5k
...Job Posting Title: Software Engineer II Req ID: Job Description: Disney Entertainment and ESPN Product & Technology Technology is at the heart of Disneys past present and future. Disney Entertainment and ESPN Product & Technology is a global organization...Full time$102.1k - $202.2k
...we make. Our goal is for the Mojang Studios team to be as diverse as our community. The Mojang web team is looking for a Software Engineer II who is passionate about modern delightful web experiences in service of the most popular game in the world: Minecraft! As a...Ongoing contractFull timeLocal area$102.1k - $202.2k
...Framework the Model Context Protocol (MCP) Microsoft Graph Dataverse Dynamics 365 Teams and Outlook. Were looking for a Software Engineer II to join our AI incubation team and work side by side with a Principal engineer on rapid prototyping. Youll take a new agent...Ongoing contractFull timeLocal area
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Software Engineer II - Blockchain. Be the first to apply!
- software development engineer aws Arlington, VA
- federal - software developer Arlington, VA
- software engineer contract Arlington, VA
- part time software developer remote Arlington, VA
- software developer Arlington, VA
- software engineer internship remote Arlington, VA
- software engineer amazon Arlington, VA
- software web developer Arlington, VA
- senior software engineer Arlington, VA
- software engineer Arlington, VA



