Senior Software Engineer - Rails

At Underdog, we make sports more fun.

Our thesis is simple: build the best products and we’ll build the biggest company in the space, because there’s so much more to be built for sports fans. We’re just over five years in, and we’re one of the fastest-growing sports companies ever, most recently valued at $1.3B. And it’s still the early days.

We’ve built and scaled multiple games and products across fantasy sports, sports betting, and prediction markets, all united in one seamless, simple, easy to use, intuitive and fun app.

Underdog isn’t for everyone. One of our core values is give a sh*t. The people who win here are the ones who care, push, and perform. If that’s you, come join us.

Winning as an Underdog is more fun.

About the role and why it’s unique:

• Work on cutting edge projects focused on gamifying and building unique features into our fantasy and sports betting products

• Design and develop clean, well-structured, and performant features — your work will be used by millions of our customers

• Work closely with other product-minded individuals to shape and deliver the next wave of transformative fantasy and sports betting products

• Collaborate with client engineers and product stakeholders from start to finish, openly communicating issues, asking clarifying questions, and raising concerns when needed

• Advocate for best practices to create strong foundational development practices for our growing team

• Grow in a high-agency environment where you have equity in technical decision-making and are accountable for those decisions

• Learn from some of the best engineers and leaders in the fantasy and sports betting world while bringing your own unique perspective; we elevate each other to make Underdog the best sports gaming platform now and for the future!

Who you are:

• A product-minded engineer with 6+ years of professional software development experience, including at least 1 year as a senior engineer.

• At least 2 years of deep experience with Ruby on Rails

• Familiarity with CI/CD, AWS, and modern DevOps tooling.

• Strong understanding of SQL, observability (e.g., Datadog, Amplitude), and API design.

• Skilled in scaling distributed systems, handling performance, caching, and database optimization.

• Comfortable working across the stack and collaborating with product and design to ship great user experiences.

• A clear communicator and empathetic teammate who values mentorship and feedback.

Even better if you have:

• Experience in fantasy sports or sports betting (or a strong interest!).

• Worked at a company through periods of rapid growth or scale.

• Experience building highly scalable and available systems to handle high traffic conditions with low latency

Our target starting base salary range for this position is between $160,000 and $240,000, plus pre-IPO equity. Our comp range reflects the full scale of expected compensation for this role. Offers are calibrated based on experience, skills, impact, and geographies. Most new hires land in the lower half of the band, with the opportunity to advance toward the upper end over time.

What we can offer you:

• Unlimited PTO (we're extremely flexible with the exception of the first few weeks before & into the NFL season)

• 16 weeks of fully paid parental leave

• Home office stipend

• A connected virtual first culture with a highly engaged distributed workforce

• 5% 401k match, FSA, company paid health, dental, vision plan options for employees and dependents

#LI-REMOTE

This position may require sports betting licensure based on certain state regulations.

Underdog is an equal opportunity employer and doesn't discriminate on the basis of creed, race, sexual orientation, gender, age, disability status, or any other defining characteristic.

California Applicants: Review our CPRA Privacy Notice here.