> Markdown version of [/jobs/ext/4628435-senior-software-engineer](https://www.wearedevelopers.com/jobs/ext/4628435-senior-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - **Company:** Symbiotica, Inc - **Location:** United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Test Suite, Amazon Web Services, Software Debugging, Ember.Js, Ruby on Rails, ReactJS, Backend, Containerization, React Native, Serverless Computing - **Published:** November 7, 2026 - **Apply:** https://arc.dev/remote-jobs/j/redirect/ktvjap9kn7 ## About the Role * 5+ years experience shipping production systems, ideally in a startup or high-ownership environment * Strong backend experience with Ruby on Rails in production and ability to design scalable architecture * Experience operating production systems with attention to performance, reliability, scalability, and cost, along with a backend stewardship mindset focused on improving architecture over time * Experience working with asynchronous systems such as background job queues, including debugging failures and handling backlogs in production * Experience planning and implementing upgrades from legacy stacks, including assessing risks, managing dependencies, and rolling out changes safely * Brownie points for hands-on experience with AWS, including deployments, monitoring, scaling, and operating serverless systems in production * Familiarity with containerization and associated tradeoffs * Comfortable working across the stack when needed (Ember, React, React Native are a plus) ## Description We're seeking a Senior Software Engineer with strong Ruby on Rails experience to join as our third engineer and take primary ownership of our backend systems. You'll work closely with our founder and fellow engineers to understand customer problems, ship improvements and new features, and keep the platform reliable. You'll own projects end-to-end, from shaping requirements through testing, deployment, and follow-through in production., * Architect, build, and maintain backend systems using Ruby on Rails within a product built with Ember, React, and React Native across multiple services * Own backend and infrastructure decisions, including performance, reliability, scalability, and cost * Deploy, monitor, and scale applications on AWS, and maintain reliable background job infrastructure * Strengthen our test suite and developer workflows to increase confidence and speed of iteration * Collaborate closely with product, operations, and customers to ship and iterate quickly * Participate in shared customer support and engineering on-call rotations * Lead incident response for backend and infrastructure failures, restore service and drive root-cause fixes and prevention