Server Side Swift Developer

Design, develop and maintain scalable backend services in Swift using Vapor. Own services end to end: design, implementation, code review, deployment and production health. Build and maintain the RESTful APIs behind customer-facing commerce flows accounts and authentication, catalogue, cart, checkout, payments and orders. Ensure correctness across multiple stores and languages, where every request is scoped to a market and a locale. Design and maintain integrations with third-party systems commerce platform, order management, search, CMS, and payment/BNPL gateways including webhook handling and safe degradation when those systems are slow or unavailable. Build concurrency-safe, idempotent processing for operations that run across multiple service replicas and must never be applied twice. Model data and optimise queries in MongoDB; implement caching and session strategies in Redis. Implement and tune Elastic Search-backed search and listing functionality. Ship behaviour changes behind feature flags with staged, measured rollouts. Investigate production issues from logs and metrics, and validate fixes with evidence. Maintain CI/CD pipelines and deployment workflows on Kubernetes. Explore AI-driven capabilities such as vector search for personalisation. Review teammates' changes; all code is reviewed before merge regardless of seniority. Desired Candidate Profile 6+ years of professional software development experience, including at least 3 years building production backend services in server-side Swift (Vapor). Client-side Swift alone does not satisfy this requirement the role requires Swift running on a server, under load, with a database behind it. Prior iOS/macOS or backend experience in other languages is welcome for the remaining years. Strong command of Swift concurrency, protocol-oriented design and Codable, including decoding payloads from external systems. Demonstrable experience with concurrency, race conditions and idempotency in services running as multiple instances a specific production bug you found, diagnosed and fixed, not theoretical knowledge. Strong understanding of RESTful API design, authentication and token lifecycle. MongoDB in production, including data modelling, indexing and query performance. Redis for caching and session state, including graceful behaviour when it is unavailable. ElasticSearch for search and listing. Experience integrating payment gateways and third-party APIs, including webhook-driven flows. Kubernetes: deploying and operating containerised services, and reading logs and metrics to a defensible conclusion. Git, CI/CD pipelines and automated testing; Swift Package Manager for dependency management. Strong grasp of performance, scalability and security best practices. E-commerce, payments or another domain where defects have direct financial consequences. Integration experience with Magento or a comparable commerce platform, or with an order management system. Multi-tenant or multi-region systems where data isolation is a correctness requirement. Localisation beyond string swapping, including right-to-left languages. AWS or another cloud platform for hosting backend services. Logging and monitoring tools such as New Relic, used for investigation rather than dashboards alone. Feature-flagging and progressive rollout platforms. Jenkins and Gerrit. Agile development methodologies.