Senior Ruby Engineer Job Sheffield area,England UK,Software Development

Design and implement scalable, high-performance backend systems to power our e-commerce experience
Build and maintain interfaces that support our frontend, mobile, and third-party integrations
Be very experienced working with pull, push models for data parity between third parties and our systems around e-commerce concerns of product, stock, orders and fulfillment synchronization
You'll design, implement and deploy reliable software to solve complex e-commerce concerns
Architect systems for membership access, catalog management, checkout, order fulfillment, and payments
Collaborate cross-functionally with product, design, and data teams to deliver features that elevate the user experience
Own backend services end-to-end, from design to deployment and monitoring
Contribute to best practices in code quality, testing, reliability, and observability
Help define our backend architecture and make strategic technical decisions as we scale
Mentor junior engineers and foster a culture of technical excellence and collaboration

What You'll Do

Design and implement scalable, high-performance backend systems to power our e-commerce experience
Build and maintain interfaces that support our frontend, mobile, and third-party integrations
- Be very experienced working with pull, push models for data parity between third parties and our systems around e-commerce concerns of product, stock, orders and fulfillment synchronization
- You'll design, implement and deploy reliable software to solve complex e-commerce concerns
Architect systems for membership access, catalog management, checkout, order fulfillment, and payments
Collaborate cross-functionally with product, design, and data teams to deliver features that elevate the user experience
Own backend services end-to-end, from design to deployment and monitoring
Contribute to best practices in code quality, testing, reliability, and observability
Help define our backend architecture and make strategic technical decisions as we scale
Mentor junior engineers and foster a culture of technical excellence and collaboration

Who You Are

8+ years of experience building and scaling backend systems in production environments
4+ years leading Ruby cloud stack teams as a Principal Engineer/Architect
You are very familiar with the Ruby object model - eigenclasses, method dispatch, , send, and all variable types
Expert skills with Ruby idiomatic patterns, terse styling, metaprogramming and be able to create macros, DSLs, etc
- Have experience contributing to wildly used gems or developed internal DSLs for domain specific needs
Ruby without Rails - you are able to develop complex applications and deploy Rails features vs custom Ruby plugins for the right use cases
Proficiency in building APIs and distributed services using Ruby
Must know the full ins/outs of Rails AREL, performant code, and proper Sidekiq job handling
Have expert knowledge of proper data model design for e-commerce concerns and understand how to handle locking sensitive resources such as a credit card charge and concepts such as state machines
Expert experience with PostgreSQL, including complex joins and reporting queries, and familiarity with data modeling and performance optimization
Familiarity with cloud infrastructure (e.g., AWS, ECS, Code Build) and containerization (Docker,)
Strong understanding of system design, data structures, and algorithmic principles
Comfortable working in high-growth, early-stage environments—bias toward action and strong product sense are key
A collaborative teammate who communicates clearly and is excited to shape the future of a luxury tech brand

Bonus Points

Prior experience in e-commerce, marketplaces, or membership-based platforms
Familiarity with event-driven architectures and message queues (Kafka, SQS, etc)
Experience working closely with design or product teams in consumer-facing companies
Passion for fashion, luxury, or retail innovation

Requirements What You'll Do

Design and implement scalable, high-performance backend systems to power our e-commerce experience
Build and maintain APIs that support our frontend, mobile, and third-party integrations
Architect systems for membership access, catalog management, checkout, order fulfillment, and payments
Collaborate cross-functionally with product, design, and data teams to deliver features that elevate the user experience
Own backend services end-to-end, from design to deployment and monitoring
Contribute to best practices in code quality, testing, reliability, and observability
Help define our…