Job Description

As a Senior Ruby on Rails Developer you will work on a production Rails application that includes customer-facing features, internal systems, and external integrations. This role owns work end-to-end, from design and implementation through testing, performance, and production readiness.

Responsibilities
  • Design, build, and maintain features in a modern Rails codebase
  • Own background and asynchronous workflows including retries, idempotency, throughput, and observability
  • Model, query, and optimize data in a document-oriented datastore environment
  • Build and maintain HTTP APIs and third-party integrations including webhooks, authentication, billing, and notifications
  • Diagnose and resolve production issues in collaboration with product and support
  • Improve system reliability, performance, and operational safety
  • Contribute to long-term code health through refactoring, testing improvements, security practices, and thoughtful code review
Technical Stack
  • Ruby and Rails 8.x for backend and API development
  • Redis-backed background job systems
  • Document-oriented datastores and search or indexing systems
  • HTTP APIs, OAuth and OpenID-based authentication, and webhook-driven integrations
  • Hotwire, Turbo, Stimulus-style JavaScript, and modern asset tooling such as esbuild and Tailwind-style CSS
  • Observability tooling including APM, error tracking, logging, metrics, and rate limiting
  • Comprehensive automated testing across unit, integration, and system layers
Requirements
  • C1 English or equivalent
  • Senior-level, hands-on experience building and operating production Ruby on Rails applications
  • Strong background in background job systems and asynchronous processing with real-world operational concerns
  • Experience designing and querying document-oriented data models with attention to indexing and performance
  • Experience building external-facing APIs with authentication, authorization, and rate limiting
  • Strong testing discipline and experience diagnosing flaky or non-deterministic tests
  • Security-minded approach to application design and production operations
Preferred Qualifications
  • Experience working with high-growth startups
  • Experience building products using LLMs or LLM-based agents. Ideally, using Langchain
  • Experience training AI models: building, cleaning datasets, setting up training pipelines, and evaluation benchmarks
  • Experience building code generation or editing solutions
  • A team-player mentality with a history of influencing and improving development processes
Nice to Have: Email and Deliverability Domain
  • Practical understanding of email deliverability fundamentals including reputation, mailbox provider behavior, and bounce or deferral handling
  • Familiarity with email authentication and DNS concepts including SPF, DKIM, DMARC, and MX or TXT records
  • Understanding of SMTP mechanics such as handshakes, response codes, and safe retry strategies
  • Experience identifying and handling low-quality or risky email data such as disposable, role-based, typo, or catch-all addresses
  • Experience building safeguards around email data handling including redaction, privacy controls, and non-production send protections
  • Comfort using AI-assisted development tools responsibly while maintaining strong engineering judgment, code quality, and test coverage
Benefits
  • Compensation: $5000 to $7000 USD/ monthly
  • PTO: Unlimited
  • Holidays: US or local
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