Senior Software Engineer, Ruby on Rails

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, Ruby on Rails, you'll build and scale the systems behind some of our most impactful product features. You'll work across the stack to deliver high-quality solutions that drive value for our customers and the business. In this role, you'll bring a clean-code mindset and a collaborative approach to a fast-moving environment, partnering closely with cross-functional teams to improve system performance, reliability, and scalability as we grow.
What You'll Do

• Lead development of moderately complex features, driving team-wide technical initiatives from design through deployment.
• Collaborate with Product, Design, and Architecture teams to shape technical solutions that support strategic goals.
• Write clean, testable code and build robust integration and unit tests to ensure high code quality and maintainability.
• Investigate and resolve production issues, lead root cause analyses, and implement solutions that improve system reliability.
• Support on-call rotations, contribute to post-incident reviews, and drive a culture of accountability and operational excellence.
• Champion best practices in code reviews, architecture discussions, and team processes to elevate engineering quality.
• Thrive in a fast-paced, iterative environment that values agility, continuous improvement, and shared ownership.

What You'll Bring

• Bachelor's degree in Computer Science or any relevant combination of education, experience, and training.
• At least 3 years of experience building web applications in Ruby on Rails or a similar MVC framework.
• Strong knowledge of PostgreSQL or similar relational databases, including writing SQL and designing schemas.
• Comfort with frontend basics (HTML, CSS, JavaScript); exposure to frameworks like React is a plus.
• Practical understanding of cloud platforms, ideally GCP, including deployment, monitoring, and CI/CD workflows.
• A self-motivated and organized mindset with a track record of delivering quality code in a team environment.
• The ability to mentor others and influence technical decision-making.
• A sense of ownership and drive to continuously improve both your work and your team's outcomes.

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.
The US base salary range for this full-time position is 119,500.00 USD - 149,400.00 USD, plus bonus, equity, and benefits as applicable. Our ranges are determined by role, level, and location. The compensation information displayed on each job posting reflects the range for new hire pay rates for the position across all US locations. Within the range, individual pay is determined by work location and additional factors, including job-related skills, experience, and relevant education or training. Your recruiter can share more about the specific pay range and how that was determined during the hiring process. It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.