Senior Fullstack Engineer

The Crown Is Yours

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As a Senior Fullstack Engineer, you'll tackle complex features across the stack - from dynamic microfrontends to high-throughput, event-driven services. In this role, you'll design and build within a distributed architecture where reliability, scale, and long-term maintainability matter. Working closely with Engineering, Product, and Design teams, you'll deliver resilient solutions that hold up under real production load. You'll be trusted to solve tough technical challenges, support critical systems, and mentor engineers while raising the bar for speed, quality, and system design.

What you’ll do as a Full-Stack Engineer

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• Design, build, and maintain fullstack features within a distributed, event-driven architecture using .NET and React.
• Own technically complex work from design through implementation, deployment, and long-term support.
• Develop APIs, microservices, and microfrontends that enable fast, reliable product experiences.
• Write clean, well-tested, and performant code with an eye toward scalability and maintainability.
• Investigate and resolve production issues using observability tools and system logs.
• Collaborate closely with engineers, product managers, and designers to plan and deliver solutions.
• Review peer code thoughtfully, offering feedback that improves clarity and quality.
• Mentor junior engineers through pairing, reviews, and everyday coaching.

What you’ll bring

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• Bachelor's degree in computer science or any suitable combination of education, experience, and training.
• 3+ years of experience in C#/.NET development with a strong understanding of object-oriented principles.
• Proficiency in React or other modern JavaScript frameworks such as Angular or Vue.
• Hands-on experience with distributed systems, asynchronous communication patterns, and Docker, Kubernetes, and AWS.
• Experience with SQL and NoSQL databases.
• Strong understanding of system design principles, scaling strategies, and architectural trade-offs.
• A collaborative approach to mentoring and reviewing code that elevates team performance.
• A bias for action, sound technical judgment, and a team-first mindset.
• Good level of verbal and written English for clear communication within a global team.

#LI-GS1

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Join Our Team

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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.