# Senior Software Engineer at Mastercard

Mastercard is hiring a Senior Software Engineer. Level rates it Little AI ●○○○; you can [apply on Level](https://jobsbylevel.com/go/9b0510ea-ce61-4765-b7b8-4b94b408708e?utm_medium=ai-agent).

AI Level 1, AI centrality 36 out of 100. O'Fallon, Missouri.

## Details

- Company: [Mastercard](https://jobsbylevel.com/companies/mastercard)
- AI level: AI Level 1 (score 36 out of 100)
- Location: O'Fallon, Missouri
- Posted: October 13, 2026
- Apply: https://jobsbylevel.com/go/9b0510ea-ce61-4765-b7b8-4b94b408708e?utm_medium=ai-agent

## Description

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 Software Engineer Overview The Business & Market Insights team within Mastercard's Services organization develops products and platforms that help customers understand consumer behavior, market trends, and business performance. Through data-driven insights, the team enables organizations to make informed decisions and drive growth. As a Senior Software Engineer, you will design, build, test, deploy, and support full-stack solutions that power these capabilities. Working across the frontend, backend, data, and cloud ecosystem, you will contribute to modern, reliable platforms while helping advance technical excellence and operational maturity. What You'll Do Software Development •Design, develop, test, and support full-stack applications, APIs, and services. •Translate business and technical requirements into maintainable solutions. •Build REST APIs, microservices, and user-facing functionality. •Write high-quality code that aligns with Mastercard engineering standards. Design & Architecture •Participate in application design and architectural discussions. •Contribute to cloud-based, resilient solution designs. •Support modernization efforts and technology enhancements. Quality & Operational Excellence •Create and maintain automated unit, integration, and API tests. •Participate in code reviews to strengthen quality and maintainability. •Troubleshoot production issues, perform root cause analysis, and optimize performance. •Support observability, monitoring, CI/CD pipelines, and operational readiness. Collaboration •Partner with Product, Architecture, UX, Security, and Engineering teams to deliver business value. •Participate in Agile ceremonies, technical planning, and knowledge-sharing activities. •Promote engineering standards and continuous improvement. Required Qualifications •Bachelor's degree in Computer Science, Engineering, Information Technology, or a related field, or equivalent practical experience. •Agentic AI Development and Spec-Driven Development experience. •Experience building enterprise solutions using Java and Spring Boot. •Experience developing REST APIs, microservices, and distributed systems. •Working knowledge of React, JavaScript/TypeScript, HTML, and CSS. •Experience with cloud platforms, relational databases, and CI/CD pipelines. •Strong troubleshooting, debugging, and analytical skills. •Ability to deliver technical solutions independently while collaborating effectively within a team environment. Preferred Qualifications •Experience with API management solutions such as Apigee, MuleSoft, Kong, or similar platforms. •Knowledge of AWS cloud services and cloud-native application design. •Familiarity with Kafka and event-driven architectures. •Experience with containerization, orchestration, and Infrastructure as Code tools, including Docker, Kubernetes, and Terraform. •Exposure to observability, monitoring, and performance management tools such as Splunk, Dynatrace, Grafana, or Prometheus. Success Measures (First 12 Months) •A successful Senior Software Engineer will: •Deliver features from design through production deployment. •Build reliable, high-performing applications and services. •Enhance maintainability, performance, and operational efficiency. •Demonstrate ownership of key systems or technical domains. •Contribute to quality, automation, and engineering excellence. Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without

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Source: https://jobsbylevel.com/jobs/senior-software-engineer-at-mastercard-9451a0

## Cite this page

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