Senior Full-Stack Ruby Software Engineer

We are looking for a Senior Full-Stack Ruby Software Engineer to build and scale a multi-tenant SaaS platform serving real estate / 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 for 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
• Expertise in React and TypeScript, and flexibility to use 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, writing meaningful tests and verifying behavior rather than assuming it
• English proficiency at B2 level or higher

Nice to have

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

Benefits

With us you can:

• Work on a flexible schedule remotely or from any of our comfortable offices or coworking spaces in Ukraine
• Receive the necessary equipment to perform your work tasks
• Change projects and technology stacks within EPAM
• Gain experience in various business domains (Insurance, E-commerce, Healthcare, Finance, Travelling, Media, Artificial Intelligence, and more)
• Relocation opportunities may be available for eligible candidates, depending on the role and openings at other EPAM locations
• Participate in volunteer, charity programs and communities (both technical and interest-based)

We focus on your professional growth:

• You can plan your individual career path together with your manager
• Receive regular feedback from colleagues
• Improve your English for free with certified teachers (Speaking Clubs, client interview preparation courses, etc.)
• Get the opportunity to undergo free training and certification in AWS, GCP, or Azure Clouds
• Use the internal E-learn training program (18,200+ specialized training and mentoring programs)
• Access corporate accounts on LinkedIn Learning, Get Abstract and other partner resources
• Study at EPAM Solution Architecture School with the instructors who are practicing architects
• Develop as a leader, join Delivery Management, Resource Management, Leadership Essentials school and more
• Participate in internal communities (500+ meetups, technical discussions, brainstorming sessions, online events and conferences annually)

What we offer:

• Vacation and sick leave (including a sick leave without a medical certificate)
• A wide range of Voluntary Medical Insurance programs providing both medical treatment and various preventive options (including sports activities)
• Medical insurance for family members at corporate rates
• Company support during significant life events (childbirth or adoption, marriage, etc.)
• Support for psychological comfort: discounts on services from mental health specialists or coaches, thematic training
• E-kids program - a free programming language training program for EPAMers' children