• Ensure development of new software systems. • Create various scripts and tests (unit and integration). • Maintain existing systems by analyzing issues, researching solutions, and proposing improvements. • Create and maintain REST APIs. • Actively participate in sprint planning. • Manage tasks autonomously.

At DraftKings, AI is becoming an integral part of both our present and future, powering how work gets done today, guiding smarter decisions, and sparking bold ideas. It's transforming how we enhance customer experiences, streamline operations, and unlock new possibilities. Our teams are energized by innovation and readily embrace emerging technology. We're not waiting for the future to arrive. We're shaping it, one bold step at a time. To those who see AI as a driver of progress, come build the future together. The Crown Is Yours As a Senior Software Engineer, you'll lead the development of seamless, high-impact user experiences across our customer-facing products. You'll own key aspects of frontend architecture, drive performance improvements, and shape technical direction across teams. Collaborating with engineers, designers, and product managers, you'll turn complex challenges into scalable, reliable solutions that power millions of user interactions. In this role, your decisions will impact and shape the future of our platform. What you'll do as a Senior Software Engineer - Design and develop performant, scalable frontend systems for real-time, high-traffic applications. - Take ownership of core frontend architecture, advocating for and implementing best practices in code quality, performance, and accessibility. - Ship production-grade code that enhances user flows, improves speed, and strengthens cross-platform stability. - Lead design and code reviews, mentor junior engineers, and promote a culture of technical excellence. - Collaborate across teams to translate business needs into intuitive, impactful features. - Drive improvements in our design systems, tooling, and frontend infrastructure to support long-term growth. - Investigate and resolve complex bugs and performance bottlenecks across browsers and devices. What you'll bring - At least 3 years of professional experience building modern frontend applications using frameworks such as React, Vue, or Angular. - Strong expertise in JavaScript, HTML, and CSS, with deep knowledge of browser behaviors and rendering performance. - Solid understanding of object-oriented programming, software design principles and data structures and algorithms. - Proven experience delivering performant, responsive, and accessible interfaces at scale. - Proficiency in writing and maintaining test suites for frontend applications, including unit, integration, and end-to-end tests. - A strong collaborator with experience mentoring teammates and leading technical discussions. - Ability to break down complex problems, make data-informed decisions, and thrive in a fast-paced environment. - A mindset focused on user impact, maintainability, and continuous improvement. - Good level of verbal and written English for clear communication within a global team. #LI-GS1 #LI-REMOTE Join Our Team We're a publicly traded (NASDAQ: DKNG) technology company headquartered in Boston. As a regulated gaming company, you may be required to obtain a gaming license issued by the appropriate state agency as a condition of employment. Don't worry, we'll guide you through the process if this is relevant to your role.

• Develop and maintain high-performance React Native applications, ensuring smooth functionality across both iOS and Android platforms. • Configure and manage bare React Native projects (without Expo), integrating native modules using JSI & Bridge where necessary. • Build reusable and responsive mobile UI components, leveraging native code and styling with CSS/SCSS. • Implement key mobile features such as push notifications, in-app purchases, and OAuth 2.0 authentication. • Integrate and optimize third-party native modules, ensuring seamless communication between JavaScript and native code. • Manage iOS and Android environments using Xcode and Android Studio, handling build processes and deployments via TestFlight and Google Internal Release. • Configure and maintain iOS schemes and Android build variants to support multiple environments efficiently. • Identify and resolve performance bottlenecks in both JavaScript and native code using debugging tools like React Native Debugger, Xcode, and Android Studio. • Ensure smooth animations and interactions with Reanimated 2.0+ while managing application state effectively using Redux and react-redux. • Implement unit and end-to-end testing using Detox and Jest to maintain code quality and stability. • Work closely with QA teams to diagnose and fix issues in live applications, ensuring a seamless user experience.

• Setting up a new team for a leading global consumer insights and market research provider • Working on a DIY survey platform which allows creating surveys and analyzing results • Focusing on the creation of new modules for the platform