galaxy venture portfolio, portfolio company, venture investing, stage-agnostic, investments, protocols, scaling solutions, DeFi, web3, infrastructure,

Galaxy Ventures

Portfolio Jobs

Apply to jobs in the Galaxy Ventures portfolio.

Senior Software Engineer (.NET/C#)



Software Engineering
New York, NY, USA
Posted on Friday, May 24, 2024

Our Purpose

We work to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart and accessible. Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments and businesses realize their greatest potential. Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company. We cultivate a culture of inclusion for all employees that respects their individual strengths, views, and experiences. We believe that our differences enable us to be a better team – one that makes better decisions, drives innovation and delivers better business results.

Title and Summary

Senior Software Engineer (.NET/C#)

Who is Mastercard?

Mastercard is a global technology company in the payments sector. We power payments and provide products and services for individuals and industries all around the world. Our people, technology, data and brand provide the capabilities that drive our success. We believe in connecting people to priceless possibilities.

As a company, we know that our success is driven by the skills, experience, integrity and mindset of the talent we hire. By building an inclusive, world-class culture, our employees have once-in-a-career opportunities to be a part of teams that have a greater impact on our community and our world. We invite you to join our team to find out how you too can start something priceless.


In addition to our traditional payments portfolio, Mastercard is aggressively expanding into new payment flow and leveraging the digital and connected world of people and economies to deliver faster, reliable and more efficient propositions to make payments – send or receive money.

The Cross Border program is part of the wider Disbursement & Remittances business that we are looking to expand at a compounded rate of 50% per year for the next 5 years. We are building solutions to enable payments in an any-to-any format – anyone, anywhere can send or receive money using any channel – money exchanges, banks, digital wallets, cards or fintech apps – providing a seamless and unified experience for both individuals and business to move money.

We are looking for a passionate, innovative and skilled software engineers with a drive to design and implement scaleable and resilient solutions.

• Are you interested in helping people move money across borders in a fast and cost-effective manner?
• Are you looking for the challenge to transform a successful business proposition into a cutting-edge technology solution?


We live by the ‘Mastercard Way’ cultural values every day – Create Value by thinking big and bold, Grow together by enabling an open culture and supporting different perspectives and moving fast by experimenting and pivoting but owning the outcomes always!

As a Senior Software Engineer, you will be:
• Responsible for the analysis, design, development and delivery of software solutions
• Defines requirements for new applications and customizations, adhering to standards, processes and best practices


• Participate in team prioritization discussions with Product/Business stakeholders
• Estimate and own delivery tasks (design, dev, test, deployment, configuration, documentation) to meet the business requirements
• Automate build, operate, and run aspects of software
• Drive code/design/process trade-off discussions within their team when required
• Report status and manage risks within their primary application/service
• Drive integration of services focusing on customer journey and experience
• Perform demos/acceptance discussions in interacting with Product owners
• Understands operational and engineering experience, actively works to improve experience and metrics in ownership area
• Develop complete understanding of end-to-end technical architecture and dependency systems
• Drive adoption of technology standards and opinionated frameworks, and review coding, test, and automation work of team members
• Mentor and guide new and less-experienced team members
• Identify opportunities to improve an overall process and trim waste
• Share and seek knowledge within their Guild/Program to drive reuse of patterns/libraries/practices and enhance productivity

All About You

We encourage diverse educational backgrounds as long as they have helped you build skills and capabilities contribute to your expertise. A formal college experience is also valued.

• Polygot with expertise on both .Net and atleast 1 additional language [Java, Python, Angular]. Extensive .Net expertise is mandatory, given the core platform is built using .Net stack
• Familiar with secure coding standards (e.g., OWASP, CWE, SEI CERT) and vulnerability management
• Understands the basic engineering principles used in building and running mission critical software capabilities (security, customer experience, testing, operability, simplification, service-oriented architecture)
• Understands internals of operating systems (Windows, Linux) to write interoperable and performant code
• Able to perform debugging and troubleshooting to analyze core, heap, thread dumps and remove coding errors
• Understands and implements standard branching (e.g., Gitflow) and peer review practices
• Has skills in test driven and behavior driven development (TDD and BDD) to build just enough code and collaborate on the desired functionality
• Understands use cases for advanced design patterns (e.g., service-to-worker, MVC, API gateway, intercepting filter, dependency injection, lazy loading, all from the gang of four) to implement efficient code
• Understands and implements Application Programming Interface (API) standards and cataloging to drive API/service adoption and commercialization
• Has skills to author test code with lots of smaller tests followed by few contract tests at service level and fewer journey tests at the integration level (Test Pyramid concept)
• Apply tools (e.g., Sonar, Zally, Checkmarx ) and techniques to scan and measure code quality and anti-patterns as part of development activity
• Has skills to collaborate with team and business stakeholders to estimate requirements (e.g., story pointing) and prioritize based on business value
• Has skills to elaborate and estimate non-functional requirements, including security (e.g., data protection, authentication, authorization), regulatory, and performance (SLAs, throughput, transactions per second)
• Has skills to orchestrate release workflows and pipelines, and apply standardized pipelines via APIs to achieve CI and CD using industry standard tools (e.g., Jenkins, AWS/Azure pipelines, XL Release, others).
• Understands how to build robust tests to minimize defect leakage by performing regression, performance, deployment verification, and release testing
• Has skills to conduct product demos and co-ordinate with product owners to drive product acceptance signoffs

In the US, Mastercard is an inclusive Equal Employment 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. If you require accommodations or assistance to complete the online application process, please contact 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 based on location, experience and other qualifications for the role and may be eligible for an annual bonus or commissions depending on the role. 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 new parent leave, up to 20 paid days bereavement leave), 10 annual paid sick days, 10 or more annual paid vacation days based on level, 5 personal days, 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, gender-inclusive benefits and many more.