Senior Full-Stack Ruby on Rails Engineer

About the role Description We’re looking for a Senior Full-Stack Ruby on Rails Engineer to lead development of our analytics dashboard. You’ll design, build, and maintain Rails APIs, background jobs, and database schemas that power data-rich React components and interfaces. You’ll work closely with product managers, designers, front-end developers, and infrastructure to rapidly push new features from ideation to production. This is a hands-on role with plenty of scope to influence architecture, user experience, and coding standards. While we’re targeting senior engineers, we’re open to strong mid-level candidates who demonstrate leadership, ownership, and a passion for full-stack craftsmanship. Team, Culture, and Product We're a small engineering team looking to grow. We're a remote-only organization with most of the engineering team working from US timezones. We aim to help mobile app developers make data-driven decisions about their marketing in a secure, privacy-centric, user-friendly way. We encourage flexibility in working locations and hours but also make sure we all overlap at least briefly for a bit each day. Responsibilities Lead major architecture and software design decisions Develop and maintain background jobs (Sidekiq) and employ caching to keep dashboards snappy under load Own CI/CD pipelines and deployments (GitHub Actions, Docker, Kubernetes/ECS), ensuring that releases are automated, reliable, and fast Collaborate closely with designers, product managers, and front-end developers to create user-friendly and visually appealing interfaces Write clear and maintainable documentation Ensure test coverage for new and existing features using RSpec and Jest Employ feature flags to support trunk-based development workflows Adhere to and enforce code style guidelines and best practices Profile, debug, and optimize both front-end and back-end performance issues in production and staging environments Requirements Deep expertise in Ruby on Rails (typically 5+ years) Proficiency in ReactJS (typically 3+ years), along with a strong foundation in JavaScript, TypeScript Experience integrating front-end components with Ruby on Rails backends Experience building and consuming REST APIs Familiarity with Git and hosting platforms like GitHub Excellent organization and communication skills An appetite for learning, problem-solving, and contributing to a dynamic team environment Nice-to-haves Experience with AWS, Kubernetes, and Docker Experience with Ruby outside of a Rails context (such as Sinatra) Experience with PostgreSQL Experience with advanced topics in React such as the Context Api, Memoization and Virtualization Experience with mobile app development or mobile marketing Experience building data-intensive user workflows - customizable tables, charts, etc Experience working with in-house style guides Benefits Annual budget for learning and personal development (conferences, books, classes, etc) Budget for fitness and well-being activities (gym memberships, fitness equipment) Unlimited vacation days and a vacation stipend to make sure you take time off (we recommend at least 20 days off per year) Team off-sites and other get-togethers Health Care Plan (Medical, Dental & Vision) Family Leave (Maternity, Paternity) About Tenjin Tenjin manages mobile growth infrastructure for our clients by organizing, analyzing, and securing the rush of data generated by mobile devices and marketing channels. We're reshaping mobile marketing by breaking down data silos and building an integrated data platform to replace the detached services in use today. The team at Tenjin is small but growing. We feel passionately about doing work that matters. Working here will provide you with opportunities for growth and leadership at the intersection of big data and mobile marketing. If you’re looking to work in an environment with smart, talented coworkers who value good people and good ideas, we’d like to talk to you. Self-directed team players will enjoy the balance of flexibility and collaboration that guides our culture. Tenjin is remote-friendly with people in San Francisco, Atlanta, Berlin, and Tokyo. Tenjin Founded: 2014 Batch: S14 Team Size: 30 Status: Active Location: San Francisco       Founders Christopher Farm   CEO Amir Manji   Head Barista