Senior Software Engineer

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 (https://www.mastercard.us/en-us/vision/who-we-are/diversity-inclusion.html) 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 Overview: Mastercard’s Test & Learn team is seeking a Senior Software Engineer to help us scale our platform development and tackle the big challenges of the future. This role is ideal for a seasoned engineer who excels in developing data-intensive applications and has strong expertise across the full technology stack, including frontend, API, and backend development. As a Senior Software Engineer, you will play a key role in designing, developing, and optimizing scalable applications that handle large volumes of data efficiently. The Test & Learn teams within Mastercard's Services organization aim to build industry-leading business experimentation software that brings sophisticated analytic techniques to business users around the world. We are rapidly expanding our product offerings and innovating on how we deliver Test & Learn solutions to our clients. Engineers work in small, flexible teams. Every team member contributes to designing, building, and testing features. There are no rigid organizational structures, and each team uses processes and technologies that work best for team members and projects. Role: • Design, develop, and maintain end-to-end software solutions including frontend, backend, and APIs, ensuring high performance, scalability, and reliability. • Work on data-intensive applications, optimizing data storage, retrieval, and processing to ensure efficient performance and responsiveness. • Partner closely product management to translate functional requirements, as well as identifying the necessary non-functional requirements, to create a technical implementation plan. • Collaborate with cross-functional teams to define software architecture and design patterns that meet business requirements and align with best practices. • Write clean, maintainable, and efficient code while enforcing coding standards, best practices, and peer code reviews. • Identify and resolve performance bottlenecks at various levels of the stack, including database schema and table design, SQL queries, API calls, and frontend rendering. • Build features used by some of the world's largest organizations to make multi-million-dollar decisions. • Provide technical guidance and mentorship to junior software and data engineers, fostering a collaborative and growth-oriented environment. • Stay updated with the latest industry trends, tools, and technologies, and proactively propose improvements to enhance software quality and development processes. All About You: • Extensive experience as a full-stack Software Engineer or Software Developer with a strong emphasis on data-intensive applications. • Expertise designing schemas and optimizing queries in a relational database. SQL Server knowledge is a plus. • Working knowledge of advanced database structures including indices, partitions, columnstore. • Expertise in an object-oriented server-side programming language and paradigms. .NET is a plus • Strong troubleshooting skills for accuracy and performance on the database, web server, and browser. Experience interpreting query plans is a plus. • Working knowledge of a web development front-end stack (HTML/CSS/JS) • Proficiency in software release best practices including database migrations, feature flags, and code branching strategies. • Ability to understand, extend, and improve upon existing architectural patterns on both the frontend and backend. • Strong application development skills, with the ability to translate customer needs into valuable features. • Experience in system design and solving complex engineering challenges. • Experience with API development or integration is a plus. • Drive to identify and solve the root problem, not just the assigned ticket. • Proven track record mentoring junior engineers, teaching technical skills as well as providing feedback on code reviews. • Feeling of ownership over the quality and accuracy of work by all developers on the team, not just your own. • Bachelor's degree in Computer Science, Software Engineering, or a related technical field, or equivalent practical experience. • Excellent verbal and written communication skills, with the ability to articulate complex ideas clearly and concisely to both technical and non-technical stakeholders. • Strong analytical and problem-solving abilities, with a focus on improving processes to accelerate delivery, foster innovation, reduce costs, and improve quality. LI-NF1 Mastercard is an 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. 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_accommodationmastercard.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 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. Pay Ranges Arlington, Virginia: $132,000 - $212,000 USD