Senior Ruby on Rails Developer (E-Commerce)

Arc.dev

About the job

About the company

Client is a luxury fashion mobile platform that delivers exclusive, members-only shopping experiences. Our e-commerce engine powers a marketplace model with complex membership management, inventory aggregation, and dynamic pricing strategies. Combining React Native front end with a Ruby on Rails back end to serve a global customer base.

We’re now looking for an expert-level Ruby developer to help solve complex e-commerce challenges, working on architect-level code in a highly collaborative, fast-paced environment.

Engagement Details

Type: Full-time contract (40 hrs/week)
Duration: Long-term (6+ months, with potential extension)
Location: Preferably EU/Eastern European time zones (open to exceptional candidates elsewhere)
Start Date: Immediate (target hire within 2 weeks)

Key Responsibilities

Architect and implement solutions for complex e-commerce challenges, including:

*Dynamic pricing

*Inventory aggregation & reconciliation

*Product strategy and catalog management

Write and maintain custom DSLs and contribute to Ruby gems
Utilize Ruby metaprogramming techniques to build efficient, maintainable solutions
Work with Interactor gem for clean, service-oriented application design
Collaborate with the lead architect and development team to ensure scalability and performance
Optimize Postgres queries and data models for large-scale marketplace operations

Hard Requirements (must-have)

5–7+ years of expert-level Ruby development (8+ preferred)
Proven experience solving e-commerce problems at a major Rails e-commerce marketplace platform – price/inventory/product strategy and management
Demonstrated track record of writing custom DSLs and contributing to well-known Ruby gems
Strong Ruby metaprogramming skills
Experience with Postgres in high-performance production environments

Preferred (Nice-to-Have)