Senior Software Engineer

Mastercard • Arlington, VA

5d • $132,000 - $212,000 • Onsite

About The Position

The ADUEX Engineering organization is central to Mastercard’s growth strategy, delivering scalable, secure, and innovative solutions that empower small and medium businesses globally. As part of a lean, high impact engineering team, you will help build scalable cloud-native software solutions from the ground up, solving complex technical problems at scale. This role is ideal for a Senior Software Engineer who thrives in complex environments, takes ownership of system design and quality, and consistently applies advanced engineering practices to ensure reliable, high performing, and secure systems.

Requirements

• Proficiency and hands-on experience building agentic frameworks in Python/TypeScript.
• Strong experience and proficiency with modern web stacks, including Angular and React, along with JavaScript/TypeScript and Node.js / Java microservices.
• Proven experience with backend development with JAVA required
• Solid understanding of data structures, algorithms, and performance optimization techniques.
• Hands‑on experience building and operating cloud‑native systems (AWS/Azure), including APIs, event‑driven services, and distributed data stores (SQL, key‑value, or document databases).
• Proven expertise in secure coding practices and use of static and dynamic security analysis tools (e.g., Sonar, Checkmarx).
• Strong experience with Git‑based workflows, branching strategies, and leading effective peer code reviews.
• Demonstrated ability to design, implement, and maintain unit, service, and integration tests.
• Experience analyzing and troubleshooting issues across applications and systems, including production environments.
• Deep understanding of modern SDLC methodologies (Scrum, Kanban, SAFe) and when to apply them.
• Experience with CI/CD pipelines, automation, and containerized deployments.
• Familiarity with observability tools and operational best practices for mission‑critical systems.

Nice To Haves

• Familiarity with Spring Boot frameworks preferred
• Bachelor’s degree in Computer Science, Engineering, Information Technology, or equivalent practical experience is preferred.

Responsibilities

• Design and evolve scalable, maintainable, and secure software solutions, translating business and technical requirements into well-structured system designs.
• Contribute to and influence architecture decisions, defining patterns, standards, and best practices for APIs, event driven systems, microservices, and cloud‑native platforms.
• Evaluate technical trade‑offs and guide design decisions that ensure long-term system sustainability.
• Independently design, build, test, deploy, and maintain high‑quality software components and services.
• Apply advanced data structures and algorithms to solve complex problems efficiently and optimize system behavior.
• Lead and actively participate in code reviews, ensuring high standards for readability, maintainability, performance, and security.
• Coach and mentor peers through technical feedback, pairing, and informal guidance.
• Proactively analyze and optimize application and system performance, scalability, and reliability.
• Design and execute performance, load, and stress testing strategies.
• Identify bottlenecks and drive tuning efforts across application, data, and infrastructure layers.
• Define and maintain comprehensive unit, functional, and integration testing strategies.
• Promote test automation and quality gates to ensure consistent and reliable delivery.
• Ensure systems behave predictably under normal and peak workloads.
• Design systems with operational readiness in mind, including observability, logging, monitoring, alerting, and resilience.
• Take ownership of production health within owned areas, participating in incident diagnosis, root‑cause analysis, and preventive improvements.
• Continuously improve reliability, maintainability, and supportability throughout the system lifecycle.
• Apply secure coding practices throughout the SDLC, adhering to Mastercard security standards and industry frameworks (e.g., OWASP, CWE).
• Ensure vulnerabilities are proactively identified and mitigated using automated tooling and secure design principles.
• Partner closely with Product, Architecture, Site Reliability, and Security teams to deliver aligned solutions.
• Influence team and cross‑team technical decisions through expertise and data‑driven recommendations.
• Contribute to engineering communities, guilds, and knowledge‑sharing initiatives across Mastercard.

Benefits

• insurance (including medical, prescription drug, dental, vision, disability, life insurance)
• flexible spending account and health savings account
• 16 weeks of new parent leave
• up to 20 days of bereavement leave
• 80 hours of Paid Sick and Safe Time
• 25 days of vacation time
• 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

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: Associate degree