Senior Developer

Our Purpose
Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.
Title And Summary
Senior Developer

Who is Mastercard?

Mastercard is a global technology company in the payments industry. Our mission is 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. With connections across more than 210 countries and territories, we are building a sustainable world that unlocks priceless possibilities for all.

Overview
Dynamic Yield by Mastercard is looking for a Senior Developer with strong backend orientation and deep JavaScript/browser expertise.

You should have a passion for scalable, infrastructure, and performance, along with a deep understanding of backend technologies and how they interact with the web.

You'll be involved in the full cycle of software development — from ideation and design to implementation and deployment—while considering performance, observability, and reliability across the stack.

Role

• Design and implement scalable backend services using , ensuring performance, reliability, and maintainability.
• Collaborate with development teams and product managers to brainstorm and develop software solutions.
• Leverage your expert-level knowledge of JavaScript and browser internals to support performance optimization and debugging across the stack.
• Lead and contribute to projects involving Kubernetes (K8s), Pods, and containerized deployments.
• Work with Redis, OpenSearch, and AWS services (including S3 and CDN) to support data flow, storage, and delivery at scale.
• Create comprehensive technical documentation, including system specifications and troubleshooting guides.
• Monitor and optimize system performance using tools like Grafana, and contribute to observability and alerting strategies.
• Participate in code reviews, architecture discussions, and continuous improvement of development practices.

All About You

• 5+ years of experience in backend development, with a strong focus on
• Deep expertise in JavaScript, including in-browser behavior, performance tuning, and cross-browser compatibility.
• Experience working with Kubernetes, Pods, and containerized environments.
• Hands-on experience with Redis, OpenSearch, AWS (S3, CDN), and monitoring tools like Grafana.
• Familiarity with front-end technologies and how they interact with backend systems.
• Experience working in production environments with real users and high traffic.
• Strong communication skills and a collaborative mindset.
• Degree in Computer Science or a related field, or equivalent practical experience.

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.