Backend Engineer
- Hiring Organisation
- Robert Half
- Location
- London, South East, England, United Kingdom
- Employment Type
- Contractor
- Contract Rate
- Salary negotiable
shared transaction and ledger layer Supporting integration of newly acquired platform capabilities Designing APIs for frontend, mobile, and seller platform use cases (REST and GraphQL) Handling complex transaction logic including: Currency conversion Fees and commissions Reconciliation Refunds and adjustments Supporting region-specific requirements such as tax, shipping, and compliance Improving … multiple services, languages, and architectural patterns. The role combines hands-on ownership of backend services with architectural leadership responsibilities. Elixir and the Phoenix framework GraphQL PostgreSQL Redis WebSockets and Phoenix Channels for real-time communication Message-driven architectures and asynchronous processing patterns Cloud-native infrastructure supporting globally distributed workloads ...