Senior Full-Stack Ruby on Rails Engineer

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San Francisco, CA, USA
In-Office
Marketing Tech • Mobile • Software
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)

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The Company
HQ: San Francisco, CA
31 Employees
Year Founded: 2014

What We Do

Tenjin is a comprehensive growth infrastructure for mobile app marketers. Our platform consolidates and normalizes user-level marketing data from more than 300 industry-leading ad networks and acquisition sources. By unifying spend, revenue, and performance data into a single centralized environment, Tenjin saves marketers time and resources while providing a rigorously maintained foundation for building unprecedentedly powerful business intelligence solutions. Based in San Francisco, Tenjin is a Y Combinator company trusted by Fortune 1000 companies and indie developers alike, including Voodoo, RetailMeNot, Gungho, NCSOFT, Huuuge and more. For more information, visit www.tenjin.com.

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