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Senior Backend Engineer at MILE. About MILE. MILE is the new members-only shopping destination redefining luxury commerce. We offer access to a curated, seasonless catalogue of the most sought-after products from globally renowned fashion houses—all at unmatched prices. Built at the intersection of technology and fashion, MILE delivers a seamless, elevated experience for both consumers and brands. Our mission is to become the leading digital destination for luxury—where exclusivity, value, and exceptional design converge.. What We’re Looking For. We're looking for a Senior Backend Engineer to join our growing engineering team. As an early technical hire, you’ll play a foundational role in shaping the systems that power our luxury commerce platform, from our membership model to product discovery, order management, and logistics. This is a high-impact role for someone who thrives in fast-paced, product-focused environments and wants to help build a company from the ground up.. 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 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. . 7+ years of experience building and scaling backend systems in production environments.. . Genuine Rubyist having written custom DSLs and/or contributed to a major Ruby gem with the deepest knowledge of how to utilize Ruby’s metaprogramming capabilities for maximal terse and DSL-centric applications.. . Experience with the specific challenges of concurrency, inventory management/reservation, currency/price management, and third party API integration system designs - push, pull, effective normalization, etc.. . High familiarity with excellent microservices software design - using software DSLs over cloud deployed solutions - across dozens of models, concerns, and integrations.. . Experience with relational databases (e.g., PostgreSQL) and familiarity with data modeling and performance optimization.. . Familiarity with cloud infrastructure (e.g., AWS) and containerization (Docker, Kubernetes).. . Experience developing and deploying GraphQL and RESTful API interfaces.. . Experience developing multi tenant systems, relating to concerns of access control, reporting, and authorization/authentication.. . 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.. . Company Location: United Kingdom.