Core Engineering

● 6+ years of professional experience building production web applications

● Strong proficiency in Ruby on Rails and PostgreSQL — comfortable writing migrations, query objects, service objects, and background jobs

● Solid experience with React / Next.js (App Router, Server Components) and TypeScript

● Familiarity with RESTful API design, versioning strategies, and serialization patterns

● Experience with Sidekiq or equivalent background job processing at scale (queue prioritization, retries, cron scheduling)

● Comfortable working with Redis for caching, rate-limiting, and distributed locking

AI-Augmented Development

● Proficient in coding with AI tools — uses LLM-based coding assistants (Claude Code, Copilot, Cursor, or similar) as a daily part of the development workflow, not just for autocomplete but for architecture reasoning, debugging, code review, and test generation

● Comfortable using AI to accelerate unfamiliar territory — e.g., picking up a new library, understanding legacy code, or exploring architectural trade-offs

Product & E-Commerce Domain

● Hands-on experience with order lifecycle management — cart, checkout, payment capture, fulfillment, returns

● Familiarity with payment gateway integrations including tokenization, webhooks, and PCI considerations

● Understanding of shipping & logistics workflows — carrier rate-shopping, label generation, tracking

● Comfort with multi-market / multi-currency platforms — i18n, locale-aware pricing, geo-based routing

Architecture & Infrastructure

● Experience with modular monolith or Rails Engines architecture — isolating bounded contexts within a shared codebase

● Familiarity with Docker, Kubernetes (EKS), and CI/CD pipelines (Buildkite, GitHub Actions)

● Understanding of observability — structured logging, error tracking (Sentry), and APM (New Relic)

● Experience with CDN-backed asset delivery and frontend performance optimization (Core Web Vitals)

Testing & Quality

● Strong testing discipline — RSpec for backend, Playwright or Cypress for E2E, factory-based test data (FactoryBot)

● Familiarity with code quality tooling: Rubocop, ESLint, Prettier, Stylelint

Desired Candidate Profile

• ● Experience with ML/AI in e-commerce — product classification, recommendation engines ● Familiarity with SWR for client-side data fetching and Material UI component libraries ● Experience with state machines (AASM) for complex entity lifecycles ● Knowledge of cross-border e-commerce logistics ● Familiarity with AWS services — S3, CloudFront, DynamoDB, Lambda