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 Lead Software Engineer The Business Experimentation and Optimization (BE&O) teams within Mastercard's Services organization are building industry-leading software that empowers business users around the world to make data-driven decisions through advanced analytics and experimentation. As we expand our product offerings and modernize our technology stack, we are reimagining how we deliver scalable, cloud-native solutions to our clients. We are seeking a hands-on, technically strong Lead Software Engineer to drive the architecture, design, and development of our next-generation experimentation platform. In this role, you will help define and evolve system architecture and non-functional requirements-such as scalability, performance, security, and reliability-ensuring our solutions meet the highest engineering standards. As a technical leader, you will guide cross-functional teams in building scalable services, APIs, and analytical capabilities that power our platform, leveraging technologies like Databricks and cloud platforms such as AWS and Azure. You will collaborate closely with your immediate team and partner with other development teams across programs to align on shared goals, define cross-cutting initiatives, and deliver cohesive, enterprise-grade solutions. You will also mentor engineers, work across global time zones, and champion engineering excellence through best practices in software development, observability, and continuous delivery. We are seeking passionate and talented technologists who share our vision of empowering customers to make smarter, data-driven decisions. Join us and help shape the future growth of our team. Position Responsibilities: At Mastercard Services, you will lead the development of cutting-edge, analytics-driven products that help businesses worldwide seize the most value from their data. As a Lead Software Development Engineer, you will: Build advanced, cloud-native services and modern frameworks, enabling some of the world's largest organizations to make critical and data-driven decisions. Lead the development of scalable, high-performance applications by pushing the boundaries of our data analytics capabilities and implementing robust services and APIs on AWS or Azure cloud infrastructure. Drive the technical vision and roadmap for a suite of web-based data and analytics applications, integrating new technologies and modern architectural approaches to continuously enhance product capabilities and support client decision-making. This will be done in close partnership with other lead engineers across the organization to ensure alignment, scalability, and long-term platform evolution. Serve as the team's technical leader, making key architecture and design decisions, conducting design/code reviews, and ensuring best engineering practices (clean code, testing, security, performance) for high-quality software development. Collaborate closely with cross-functional teams and coordinate development efforts across global teams in different time zones, demonstrating outstanding communication and teamwork skills to deliver features effectively in a fast-paced environment. Architect, modernize, and optimize our systems to handle rapidly growing data volumes and user bases, leveraging a service architecture and cloud scalability (AWS/Azure) to ensure robust, reliable performance as we scale globally. Mentor and guide other engineers, providing technical mentorship and fostering a culture of innovation, continuous learning, and technical excellence across the team. Ideal Candidate Qualifications: 8+ years of extensive software engineering experience in an agile environment, with a strong track record of building high-performance, largescale applications and full-stack systems. Hands-on experience developing microservices and RESTful APIs, as well as working with relational databases and distributed data stores. Experience in cloud technologies (AWS and/or Azure) and modern deployment practices, including containerization (e.g., Docker) and orchestration (e.g., Kubernetes), to build and manage scalable, distributed applications. Strong experience with big data and analytics tools, particularly Databricks and Spark (or PySpark), for building data pipelines and executing large-scale data transformations. Demonstrated ability to build deep domain knowledge and effectively partner with Product Management to translate functional requirements into non-functional requirements and scalable technical designs. Experience incorporating Generative AI (GenAI) into software products and/or the software development lifecycle, including use cases such as intelligent automation, code generation, or AI-enhanced user experiences. Proven technical leadership experience, including leading engineering teams or complex cross-functional projects, making architecture-level decisions, and mentoring engineers to deliver technically excellent solutions. Hands-on experience with technology modernization initiatives-such as migrating legacy monolithic systems to modern microservice architectures-to improve scalability, flexibility, and maintainability. Ability to navigate ambiguity, define a clear technical strategy, and drive alignment across teams to move initiatives forward in uncertain or evolving contexts. Excellent collaboration and communication skills, with experience working across cross-functional teams and coordinating with globally distributed teams in multiple time zones. Self-motivated, creative, and analytical mindset, with the ability to work independently, take initiative, and thrive in a fast-paced, innovative environment. Bachelor's degree in Computer Science or a related field (advanced degree a plus), with a strong foundation in computer science fundamentals and software engineering best practices. Who is Mastercard? Mastercard is the global technology company behind the world's fastest payments processing network. We are a vehicle for commerce, a connection to financial systems for the previously excluded, and a technology innovation lab. We ensure every employee has the opportunity to be a part of something bigger and to change lives. We believe as our company grows, so should you. Mastercard is an equal opportunity employer that values diversity and inclusion. Applicants will be considered and treated without regard to gender, gender identity, race, color, ethnicity, national origin, religion, sexual orientation, veteran or disabled status, or any other characteristic protected by applicable law. 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.

Role Description We are seeking a skilled React Developer to join our team on a remote W2 contract with the opportunity to convert to a full-time role. The ideal candidate must be a US Citizen or Green Card holder and have strong experience building modern, scalable web applications using React and related technologies. - Develop and maintain responsive web applications using React.js - Collaborate with cross-functional teams including designers, backend developers, and product managers - Build reusable components and front-end libraries for future use - Translate UI/UX designs into high-quality code - Optimize applications for maximum speed and scalability - Integrate APIs and work closely with backend services - Participate in code reviews and maintain best coding practices - Utilize AI-assisted development tools to improve productivity and code quality Qualifications - Strong proficiency in React.js - Solid experience with HTML5, CSS3, and TypeScript - Hands-on experience with Material UI - Backend knowledge in Node.js and Express.js - Experience with version control tools like Git - Familiarity with modern front-end build pipelines and tools - Strong problem-solving and debugging skills - Excellent communication skills for remote collaboration Requirements - Experience with GitLab - Familiarity with Google Cloud Platform (GCP) - Experience using Jira and Confluence - Knowledge of design collaboration tools like Zeplin Benefits - Work Type: Remote - Employment Type: W2 Contract (Contract-to-Hire) - Conversion: Opportunity to transition into Full-Time - Eligibility: Only US Citizens or Green Card holders

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 Role Overview We are seeking a highly capable Senior Software Engineer with a strong foundation in software development to join our engineering organisation. This role goes beyond traditional testing and requires a candidate who actively contributes to software design, development, and quality engineering practices. The ideal candidate will demonstrate a development-first mindset, with hands-on experience in building scalable backend systems and the ability to design and implement robust automation solutions across the application stack. The individual will play a key role in embedding quality into the development lifecycle, driving engineering best practices, and ensuring systems meet functional, non-functional, performance, and security requirements. Key Responsibilities Contribute to software development and quality engineering, ensuring high standards of code quality and system reliability Design and implement scalable, maintainable test automation frameworks across API and UI layers Collaborate with engineering teams to ensure testability, performance, and security are incorporated into system design Participate in software design and architecture discussions, providing input from a quality and reliability perspective Develop and execute unit, functional, integration, and end-to-end tests Drive shift-left testing practices across the development lifecycle Enhance and maintain CI/CD pipelines, ensuring automated test execution and release validation Perform and contribute to code reviews, ensuring adherence to engineering standards and best practices Support performance engineering efforts, including analysis, tuning, and scalability validation Ensure adherence to secure coding practices and identify potential vulnerabilities Contribute to operability engineering, including observability, monitoring, and system reliability Troubleshoot and resolve complex issues across systems, ensuring minimal disruption and high system availability Continuously identify opportunities to improve engineering and quality processes Required Skills & Experience Software Development (Mandatory) Strong hands-on experience in Java development Experience building backend systems using Spring Boot Solid understanding of: Object-oriented programming Data structures and algorithms Software design principles Proven experience contributing to production-grade Java applications Ability to contribute across development and automation testing responsibilities Test Engineering & Automation Experience in: API Testing (Postman or equivalent) API Automation using RestAssured (Java) UI Automation using Selenium WebDriver or Playwright Strong understanding of: Unit, functional, and integration testing (JUnit/TestNG) RESTful services, JSON, XML Ability to design and implement: Integration, acceptance, and end-to-end automation tests Software Design & Architecture Ability to contribute to software design and architecture decisions Understanding of building systems that are: Scalable Maintainable Secure Performant Awareness of architectural patterns and best practices Performance, Security & Reliability Experience in performance engineering concepts, including system analysis and optimisation Knowledge of secure coding practices and vulnerability prevention Understanding of reliability engineering and operability principles Engineering Practices & Tooling Strong experience with: Version control systems (Git) CI/CD tools (Jenkins, Bamboo or equivalent) Code quality and coverage tools (Sonar or equivalent) Experience working in Agile development environments Strong collaboration skills with cross-functional teams Core Engineering Capabilities Strong troubleshooting and debugging skills across distributed systems Ability to work independently in moderately complex to complex scenarios Consistently applies engineering skills with growing autonomy and reliability Ability to contribute to team-level engineering improvements and mentoring Preferred / Good to Have Full-stack development exposure (Frontend + Backend) Experience with UI frameworks such as: Angular React Exposure to cloud-based applications and distributed systems Experience with in-memory data grids (e.g., Pivotal GemFire) Strong SQL knowledge (preferably Oracle DB) Exposure to monitoring and observability tools Key Expectations from the Role Must have a strong development background and not be limited to traditional testing roles Should be flexible to work across: Software development Automation testing UI validation Expected to drive a quality-first engineering culture Ability to influence system design, architecture, and delivery practices Acts as a key contributor in complex problem-solving scenarios and supports broader engineering goals 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.

Role Description EyeUniversal is looking for a Lead Developer to build and maintain functional web pages and applications. This is a remote position. Lead Developer responsibilities include: - Leading a team of junior developers - Refining business specifications - Architecting software - Executing on deadlines with project managers and stakeholders - Meeting with clients by need - Resolving all technical issues To be successful in this role, you should have extensive experience in building software from scratch and in-depth knowledge of at least one of the following programming languages: Javascript, Ruby or PHP. Ultimately, you will ensure our websites, web applications, and software projects are up and running to cover both internal and customer needs. Responsibilities include: - Identifying user and system requirements for new websites and applications - Prioritizing software development projects, setting timelines and assigning tasks to team members - Creating wireframes to decide on the layout - Writing or reviewing code for various applications - Running functionality testing and debugging code - Overseeing junior web developers and evaluating their performance - Liaising with designers to decide on UI/UX elements (like graphics and navigation buttons) - Ensuring our software documentation is up-to-date - Collaborating with mobile developers to build mobile-responsive websites Qualifications - Work experience as a Senior Developer & Manager - Expertise in at least one programming language, preferably Javascript, Ruby or PHP - Solid knowledge of HTML/CSS - Experience with mockup and UI prototyping tools - Understanding of security practices - Familiarity with network diagnostics tools - Team management skills - Delivers on Deadline - Weekly Internal Meetings w/Management & Development team - Working in English knowledge (writing and speaking) - Spanish/English bilingual is a plus - BSc/MSc in Computer Science or relevant field Requirements - This is a remote and full-time position. - Pay rate is based on experience.