4 of 4 Contract GraphQL Jobs in London

build modern, scalable web applications, with some backend/API work. Tech & Skills JavaScript/TypeScript, React/Angular/Vue Node.js, REST/GraphQL APIs HTML, CSS, responsive & accessible design Testing (Jest/Cypress), CI/CD, Git Experience integrating APIs (AI exposure a bonus) Responsibilities Build high-quality ...

/Experience The ideal candidate will have the following: Strong hands-on experience developing integrations using Boomi AtomSphere. Experience with API Management, REST, SOAP, GraphQL, and microservices architectures. Experience with XML, JSON, XSLT, data mapping, and transformation. Knowledge of enterprise integration patterns and Middleware technologies. Experience integrating enterprise platforms including ...

understanding of delivery governance, risk management, and reporting Experience using tools such as Jira and Azure DevOps Experience with modern technologies such as AI, GraphQL Experience with use of latest Agile tracking and forecasting methods Strong communication and influencing skills Problem-solving and decision-making Resilience and adaptability Agile ...

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 ...