Senior Software Engineer

Overview

Mastercard is a global technology company in the payments industry, focused on powering an inclusive, digital economy that makes transactions safe, simple, smart, and accessible. Using secure data and networks, our innovations enable individuals, financial institutions, governments, and businesses worldwide to realize their greatest potential.

Within Mastercard’s Builders Enablement Program (ONE Division), we are building a standardized, secure, cloud first software delivery ecosystem and delivering a world class developer experience.

We are seeking a Senior Software Engineer to design, build, and advance internal developer platforms through modern, data-driven user interfaces. This role requires deep technical expertise, end-to-end ownership, and the ability to lead complex engineering initiatives across architecture, development, and operations.

About The Role

Software Design & Architecture

Lead end-to-end software design and architecture, translating business and system requirements into scalable, reliable, and maintainable solutions

Define high- and low-level design artifacts, including APIs, data models, system interactions, and component boundaries

Establish and enforce architecture standards, design patterns, and engineering best practices across teams

Apply deep knowledge of data structures, algorithms, and distributed system design to solve complex performance and scalability challenges

Software Development Excellence

Own delivery of robust, secure, and high-performance software across backend platforms and frontend applications (React, TypeScript)

Drive engineering excellence in coding standards, modular design, and maintainability

Build and enhance internal developer platforms using Backstage or similar frameworks, leveraging plugin-based architectures

Develop data-driven user interfaces that surface observability and operational insights

Testing Strategy & Quality Engineering

Define And Implement Comprehensive Testing Strategies, Including

Unit testing

Integration testing

Functional/end-to-end testing

Embed automated testing within CI/CD pipelines to enforce quality gates and prevent regressions

Ensure systems meet correctness, reliability, and backward compatibility requirements at scale

Performance Engineering

Lead performance engineering initiatives, including system benchmarking, load testing, and capacity planning

Analyze system bottlenecks and optimize latency, throughput, and resource utilization across distributed architectures

Ensure applications meet strict performance SLAs in high-volume, mission-critical environments

Secure Coding & Compliance

Enforce secure coding practices and integrate security into every phase of the SDLC

Design systems that meet enterprise security, regulatory, and compliance requirements

Partner with security teams to proactively identify and remediate vulnerabilities

Troubleshooting & Incident Management

Serve as a senior escalation point for complex production issues across distributed systems and user-facing platforms

Lead root cause analysis, incident resolution, and postmortem activities

Drive systemic improvements to prevent recurring issues and improve system reliability

Code Review & Technical Leadership

Lead rigorous code reviews, ensuring adherence to best practices in design, performance, security, and maintainability

Mentor engineers and elevate team capability in software design, testing, debugging, and operational excellence

Provide hands-on guidance in solving high-complexity technical problems across system layers

Collaboration & Ownership

Partner with product, platform, and business stakeholders to shape technical roadmaps and delivery priorities

Own and deliver cross-functional initiatives spanning frontend, backend, and platform engineering

Contribute to the Software Engineering Guild by sharing reusable frameworks, patterns, and innovations

All About You

We are looking for someone who:

Demonstrates deep expertise across software development, system design, and architecture

Brings a strong foundation in data structures, algorithms, and distributed systems

Is equally comfortable working across backend platforms and frontend applications

Leads with a quality-first mindset, emphasizing testing, security, and performance

Excels at troubleshooting complex systems and driving resolution under pressure

Proactively improves operability, reliability, and developer experience

Influences technical direction and mentors engineers across teams

Qualifications

Extensive experience in software development and system design, with demonstrated ownership of large-scale distributed systems

Deep Expertise In

Software Design & Software Architecture

Data Structures & Algorithms

Troubleshooting complex distributed systems

Strong Hands-on Experience With

Unit, Integration, and Functional Testing frameworks and strategies

Performance Engineering and system optimization

Secure coding practices and application security principles

Code reviews and engineering quality standards

Operability engineering (observability, monitoring, reliability)

Proficiency in modern programming languages (e.g., Java, C#) and frontend development using React and TypeScript

Experience building internal developer platforms (Backstage or similar)

Experience with plugin-based architectures and integrating DevOps tools

Proven ability to build data-driven user interfaces

Hands-on experience with AWS (Azure a plus), Kubernetes, and cloud-native technologies

Strong experience with CI/CD pipelines and Infrastructure as Code (Terraform, CloudFormation)

Experience with observability platforms (e.g., Splunk or equivalent)

Excellent communication and technical leadership skills

Bachelor’s or Master’s degree in Computer Science, Engineering, or related field preferred

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.
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