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Posted 20 July, 2026

Senior Ruby Engineer

Hulcan
Manchester, ENG, GB Full Time

Job Description

\n What You’ll Do\n
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  • Design and implement scalable, high-performance backend systems to power our e-commerce experience.
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  • Build and maintain interfaces that support our frontend, mobile, and third‑party integrations.
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  • 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.
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  • You’ll design, implement and deploy reliable software to solve complex e‑commerce concerns.
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  • Architect systems for membership access, catalog management, checkout, order fulfillment, and payments.
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  • Collaborate cross‑functionally with product, design, and data teams to deliver features that elevate the user experience.
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  • Own backend services end‑to‑end, from design to deployment and monitoring.
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  • Contribute to best practices in code quality, testing, reliability, and observability.
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  • Help define our backend architecture and make strategic technical decisions as we scale.
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  • Mentor junior engineers and foster a culture of technical excellence and collaboration.
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Who You Are\n
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  • 8+ years of experience building and scaling backend systems in production environments.
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  • 4+ years leading Ruby cloud stack teams as a Principal Engineer/Architect.
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  • Deep familiarity with the Ruby object model – eigenclasses, method dispatch, method_missing, send, and all variable types.
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  • Expert skills with Ruby idiomatic patterns, metaprogramming, and the ability to create macros, DSLs, and contribute to widely used gems.
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  • Proficient in developing complex applications without Rails and in deploying Rails features versus custom Ruby plugins as appropriate.
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  • Experience building APIs and distributed services using Ruby.
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  • Knowledge of Rails AREL performance characteristics, Sidekiq job handling, and efficient code patterns.
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  • Expert knowledge of data‑model design for e‑commerce, including locking sensitive resources (e.g., credit card charges) and using state machines.
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  • Advanced PostgreSQL expertise: complex joins, reporting queries, data modeling, and performance optimization.
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  • Familiarity with cloud infrastructure (AWS, ECS, CodeBuild) and containerization (Docker).
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  • Strong understanding of system design, data structures, and algorithmic principles.
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  • Experience with concurrency, inventory management/reservation, currency/price management, and third‑party API integration system designs with pull/push normalization.
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  • High familiarity with microservices design, employing software DSLs for cloud‑deployed solutions across numerous models, concerns, and integrations.
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  • Expertise in GraphQL and RESTful API development and deployment.
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  • Experience developing multi‑tenant systems, addressing access control, reporting, and authentication/authorization concerns.
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  • Comfortable working in high‑growth, early‑stage environments with a bias toward action and strong product sense.
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  • Collaborative teammate who communicates clearly and is excited to shape the future of a luxury tech brand.
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Bonus Points\n
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  • Prior experience in e‑commerce, marketplaces, or membership‑based platforms.
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  • Familiarity with event‑driven architectures and message queues (Kafka, SQS, etc).
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  • Experience working closely with design or product teams in consumer‑facing companies.
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  • Passion for fashion, luxury, or retail innovation.
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Why Join MILE\n
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  • Opportunity to play a key role in shaping the future of the company.
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  • Collaborative and innovative work environment.
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  • Career growth opportunities in a fast‑growing organisation.
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