Senior Ruby Full-Stack Developer

About the Position

We are seeking a Senior Ruby Full-Stack Developer to build and scale a multi-tenant SaaS platform serving real estate and asset-management data at scale. You'll work across the entire stack - from PostgreSQL query optimization and background data pipelines to server-rendered Hotwire views and interactive React + TypeScript front-end components - and own features end-to-end, from spec through production deployment on AWS-backed Kubernetes.

This is a hands-on engineering role on a team that values high test coverage, clean conventions, and shipping reliable software to a demanding production environment.

Responsibilities

• Design and implement features across a Ruby on Rails 8 monolith using established patterns: form objects, query objects, service objects, Pundit policies, and ViewComponents
• Build dynamic, server-rendered UI with Hotwire (Turbo + Stimulus) and Bootstrap 5, and richer interactive interfaces with React + TypeScript (MUI, ag-grid, react-select, chart.js) bundled via Vite
• Model and optimize data in PostgreSQL - write efficient queries, design indexes, eliminate N+1s, and author safe, zero-downtime migrations
• Implement asynchronous and scheduled work with Sidekiq - data ingestion pipelines, file processing, and long-running jobs
• Write comprehensive automated tests (RSpec request/system specs, Vitest) as a standard part of every change
• Ship code through a CI/CD pipeline that builds Docker images, pushes to AWS ECR, and deploys to Kubernetes clusters across staging and production
• Collaborate on infrastructure managed via Terraform and Kubernetes manifests housed in dedicated infrastructure repositories

Requirements

• 5+ years of professional software development experience
• 3+ years building production applications with Ruby on Rails, including a working grasp of Rails conventions, ActiveRecord, and background processing with Sidekiq
• Proficiency in PostgreSQL - writing efficient queries and reasoning about indexes and schema changes
• Front-end expertise in React and TypeScript, and a willingness to work in a server-rendered Hotwire (Turbo/Stimulus) environment
• Familiarity with authentication and authorization patterns (e.g., Auth0, OmniAuth, Warden, Pundit, or comparable tools)
• A test-first mindset; capability to write meaningful tests and verify behavior rather than assuming it
• Excellent command of written and spoken English (B2+ level)

Nice to Have

• Deeper PostgreSQL expertise - query tuning, indexing strategy, connection pooling, and safe zero-downtime migrations
• Knowledge of AWS services (ECR, S3, RDS) and deploying containerized applications to Kubernetes
• Background in Terraform and infrastructure-as-code workflows, especially where app and infra live in separate repositories
• Understanding of multi-tenant architectures (subdomain-based tenancy) and exposure to data-pipeline / ETL work, file ingestion (S3 multipart, SFTP), and document/spreadsheet processing
• Skills in observability tooling (Sentry, New Relic, Prometheus) and production hardening (rate limiting, secure headers, health checks)

We Offer

• Opportunity to work on a challenging and impactful project
• Collaborative and innovative team environment
• Flexible remote work from Kyiv, Ukraine

About the Company

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