Senior Software Engineer (San Francisco)

About CheckrCheckr is building the data platform to power safe and fair decisions. Over 140,000 companies and millions of people rely on Checkr for AI verification in the moments that matter most: getting a new job, a new place to live, a car ride, childcare, even a date. Customers include Uber, Pennymac, Airbnb, Doordash, Amazon, and Anthropic.We’re a team that thrives on solving complex problems with innovative solutions that advance our mission. Checkr is recognized on Forbes Cloud 100 2025 List and is a Y Combinator 2024 Breakthrough Company.About the team/roleCheckr Trust is building safer communities by providing our customers with risk signals about its users. Every year, our team provides insights on tens of millions of users across multiple verticals: online dating, car rental, short-term rentals, and many more. We acquire, analyze, and deliver insights in smart, scalable ways that help organizations identify and mitigate risk.Trust is part of the Checkr start-up lab: we operate with the speed of a small startup, while enjoying the leverage and resources of a known technology brand.Since launching, we’ve seen significant growth and we are looking for a Senior Full Stack Software Engineer to play a pivotal role in the continued growth of our startup. As part of our small team, you will be empowered to take significant end-to-end ownership - from idea to execution to real customer and business impact.What you’ll do:Work closely with customers, engineers, and leaders to design, build, and launch new products.Take full ownership of the entire process of developing end-to-end applications – from shaping the idea to delivering the finished application.Build and improve APIs, including integrating with third-party services to expand what our products can do.Embrace a customer-centric, product-first approach – partner directly with customer success, customers and stakeholders to better understand their needs and turn those into useful features.Keep code reliable and easy to maintain with solid testing, thoughtful reviews, and good practices.Run and measure product experiments, using what you learn to guide future development.Building scalable APIs and asynchronous event-based architecture that can reliably handle very high traffic.What you bring:BS/MS degree in either computer science or an engineering discipline.Have founded or held early roles at successful fast-paced startups.6+ years of full stack software development experience.Advanced knowledge in Ruby (Rails), Javascript (React), or similar languages/frameworks.Experimentation mindset: autonomy and empowerment to validate a customer need, get team buy-in, and ship a rapid MVP.Early-stage approach: comfort with ambiguity, balancing speed and perfection, and the confidence and curiosity to help guide product direction.An A-player mindset with a strong bias for action: you raise the bar, move with urgency, stay resilient through ambiguity, and take ownership to deliver meaningful outcomes.Nice to have:Experience building scalable technical architecture that can scale to 10mm+ users (including observability tooling, container orchestration, etc).Background in trust & safety, IDV, background check products or criminal data.Expertise in data analysis and processing.Experience building and working with scrapers and scraping technologyPay Transparency DisclosureWe use geographic cost of labor as an input to develop ranges for our roles and as such, each location where we hire may have a different range. If this role is remote, we have listed the top to the bottom of the possible range, but we will specify the target range for an exact location when you are selected for a recruiting discussion. For more information on our compensation philosophy, seeour website.On-target Earnings OR Base Salary range (San Francisco, CA)$185,000—$218,000 USDWhat We OfferA fast-paced and collaborative environmentLearning and development allowanceCompetitive cash and equity compensation, and opportunity for advancement100% medical, dental, and vision coverageUp to $25K reimbursement for fertility, adoption, and parental planning servicesFlexible PTO policyMonthly wellness stipendAt Checkr, we believe an in office work environment strengthens collaboration, drives innovation, and encourages connection. Our hub locations are Denver, CO; San Francisco, CA; Nashville, TN; and Santiago, Chile. Individuals are expected to work from the office 3+ days a week. In-office perks are provided, such as lunch five times a week, a commuter stipend, and an abundance of snacks and beverages. A relocation stipend may be available for those willing to relocate to a Checkr hub location.Equal Employment Opportunities at CheckrCheckr is committed to building the best product and company, which requires hiring talented and qualified individuals with a diverse set of perspectives and lived experiences. Checkr believes in hiring people of all backgrounds, including those whose histories are impacted by the justice system in accordance with local, state, and/or federal laws, including the San Francisco’s Fair Chance Ordinance.Applicant Privacy PolicyIf you are a California resident or are located in Alberta or British Columbia, our Applicant Privacy Policy applies to our collection and processing of your personal information when you apply for a role with us or otherwise participate in our recruitment process.*Legitimate Checkr emails will always include our official domain name after the @ symbol (e.g., View email address on apply.placed-app.com or View email address on apply.placed-app.com).