Senior Ruby Engineer

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, method_missing, 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, CodeBuild) 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 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. Benefits Why Join MILE - Opportunity to play a key role in shaping the future of the company. - Collaborative and innovative work environment. - Career growth opportunities in a fast-growing organisation. Let’s build something people talk about. Together.