Software Engineer II

Overview

Software Engineer II developing scalable, secure, and cloud-ready full-stack applications using modern JavaScript technologies, React-based user interfaces, Node.js services, and distributed data platforms. The role contributes to software design, architecture, operational excellence, production support, and continuous improvement of engineering practices.

What you'll do

• Design and develop modern web applications using React, JavaScript/TypeScript, Node.js, and related technologies.
• Translate product and business requirements into scalable, maintainable, and secure technical solutions.
• Develop responsive, accessible, and high-performing user interfaces across devices.
• Design, build, and maintain RESTful APIs and backend services.
• Design and optimize data models using MySQL, PostgreSQL, and MongoDB based on application requirements.
• Develop modular, reusable, and maintainable software components following engineering best practices.
• Participate in software architecture discussions and contribute to technical design decisions.
• Create and maintain automated unit, integration, functional, and end-to-end tests.
• Apply secure coding practices and proactively address security, privacy, and compliance requirements.
• Conduct code reviews and contribute to engineering standards, quality initiatives, and knowledge sharing.
• Troubleshoot application, performance, database, and production issues using structured root cause analysis techniques.
• Monitor, maintain, and support applications in production environments with a focus on reliability and operational excellence.
• Optimize application performance across frontend, backend, APIs, and database layers.
• Collaborate with Product, UX, QA, DevOps, and other engineering teams to deliver business capabilities.
• Participate in Agile ceremonies, sprint planning, estimation, and continuous delivery activities.
• Research emerging technologies, frameworks, AI-assisted development tools, and engineering practices to improve team productivity and product quality.
• Abide by Mastercard’s security policies and practices.
• Ensure the confidentiality and integrity of accessed information.
• Report suspected information security violations or breaches.
• Complete periodic mandatory security trainings in accordance with Mastercard’s guidelines.

What you'll need

• Strong proficiency in JavaScript and/or TypeScript.
• Hands-on experience developing applications using React and modern frontend ecosystems.
• Experience building backend services and APIs using Node.js and Express.js or similar frameworks.
• Strong understanding of HTML5, CSS3, responsive design principles, and frontend performance optimisation.
• Experience designing and consuming REST APIs and integrating third-party services.
• Solid understanding of relational databases including MySQL and PostgreSQL.
• Experience working with NoSQL databases such as MongoDB.
• Understanding of database design, indexing strategies, query optimisation, and data modelling.
• Experience with source control systems such as Git and modern collaborative development workflows.
• Strong understanding of software design principles, object-oriented programming, and common design patterns.
• Experience creating automated unit, integration, and end-to-end tests.
• Familiarity with CI/CD pipelines and modern DevOps practices.
• Knowledge of cloud platforms and cloud-native application development concepts.
• Understanding of observability practices including logging, monitoring, tracing, and alerting.
• Strong analytical, debugging, and problem-solving skills.
• Experience participating in code reviews and mentoring junior engineers.
• Experience or exposure to AI-assisted development tools, AI-powered applications, autonomous agents, or agentic workflows.
• Agile Scrum development experience.
• Strong communication, collaboration, and stakeholder management skills.

Nice to have

• Exposure to containerisation technologies such as Docker and orchestration platforms such as Kubernetes.

Details

• Location: Navi Mumbai, India.