Senior Software Engineer

Mastercard is a global payments and technology company. The Senior Software Engineer will design and deliver scalable, enterprise-grade AI solutions using large language models, retrieval-augmented generation, vector search, and modern cloud and data platforms. The role also involves building APIs and microservices, collaborating across teams, ensuring security and compliance, optimizing production systems, and mentoring junior engineers.

Responsibilities:

• Design, develop, and deliver AI-powered solutions leveraging modern architectures, including LLM-based systems and retrieval-augmented generation (RAG)
• Build and maintain enterprise knowledge bases with vector search capabilities, enabling semantic search and intelligent information retrieval
• Develop LLM-driven applications using frameworks such as LangChain, including prompt engineering, chaining, and orchestration patterns
• Implement and integrate solutions leveraging Model Context Protocols (MCP) or equivalent model interaction frameworks
• Architect scalable and secure solutions across cloud and data ecosystems, including AWS, Cloudera, and Databricks
• Collaborate cross-functionally with product, engineering, and data teams to translate business needs into AI-enabled solutions
• Develop and maintain robust APIs and microservices to support AI applications and front-end integrations
• Ensure solutions adhere to Mastercard’s standards for data governance, security, compliance, and operational excellence
• Monitor and optimize model performance, reliability, and scalability in production environments
• Contribute to technical design discussions, mentor junior engineers, and promote engineering best practices
• 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