26 to 50 of 62 REST Jobs in the City of London

support quarterly system updates. Technical Operations Perform SQL/data analysis on ERP and Vertex databases for tax reconciliations. Troubleshoot API integrations, data feeds, and calculation discrepancies. Maintain Vertex REST/SOAP API integrations and support FBDI/ADFdi data loads. Monitor performance and optimize tax data loads and batch processes. Compliance & Reporting Support tax compliance reporting (Sales & Use Tax More ❯

support quarterly system updates. Technical Operations Perform SQL/data analysis on ERP and Vertex databases for tax reconciliations. Troubleshoot API integrations, data feeds, and calculation discrepancies. Maintain Vertex REST/SOAP API integrations and support FBDI/ADFdi data loads. Monitor performance and optimize tax data loads and batch processes. Compliance & Reporting Support tax compliance reporting (Sales & Use Tax More ❯

an understanding of performance tuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs , websockets, and authentication/security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving More ❯

an understanding of performance tuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs , websockets, and authentication/security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving More ❯

valuable) Technical Skills: Expertise in Microsoft Graph API, Microsoft 365 compliance and security, and identity management. Experience with Copilot Studio and building custom Copilot agents or plugins. Familiarity with REST APIs, JSON, OAuth, and integration patterns with enterprise systems (e.g., CRM, ERP, data lakes). Understanding of prompt engineering, grounding techniques, and responsible AI principles. Soft Skills: Strong communication and More ❯

Enhance system observability by improving diagnostics, logging, and tracing to aid technical support teams in resolving issues swiftly. Oversee the ongoing development and management of the public API, covering REST and event streaming functionality to support bespoke client integrations. Produce comprehensive technical documentation for both internal stakeholders and external users, leveraging tools like Swagger for clarity and accessibility. Drive the More ❯

5+ years commercial experience with Flutter 1+ years leading technical teams of 3-5 (will consider mentorship experience) Deep Flutter expertise: architecture, state management, testing, deployment Solid backend integration (REST, WebSockets, microservices) Experience with Firebase, AWS, and CI/CD pipelines This role can offer up to £100,000, requires 4-days per week onsite in central London, and is More ❯

5+ years commercial experience with Flutter 1+ years leading technical teams of 3-5 (will consider mentorship experience) Deep Flutter expertise: architecture, state management, testing, deployment Solid backend integration (REST, WebSockets, microservices) Experience with Firebase, AWS, and CI/CD pipelines This role can offer up to £100,000, requires 4-days per week onsite in central London, and is More ❯

. JSM Automations, Workflows, and Assets (Insight). Jira Query Language (JQL). ITIL 4, Agile, or DevOps frameworks. Familiarity with scripting or automation tools (e.g., PowerShell, Python, or REST APIs). If you do have the relevant experience for this Jira SME role, please do apply. More ❯

years of hands-on experience with WebMethods tools (Integration Server, Broker, Designer). Working knowledge of Axway technologies, particularly API management and B2B gateway. Understanding of web services (REST/SOAP) and common integration patterns . Strong problem-solving and debugging skills. Experience working in environments that require compliance with integration best practices and security standards. More ❯

with clarity and context Participate in release testing and ensure product stability before deployment Requirements Proven experience testing front-end (React/React Native) and back-end (Node.js/REST/GraphQL) systems Strong understanding of software QA methodologies, tools, and processes Experience writing automated tests with frameworks such as Playwright, Cypress, Jest, or similar Familiarity with CI/CD More ❯

C#/.NET (6-8) and .NET Framework for backend/service development. Experienced in PowerShell scripting for administrative automation. Hands-on with Microsoft Graph API, EWS, SOAP, and REST for M365 integration. Skilled with Azure PaaS: App Service, WebJobs, Functions, Storage, Service Bus/Event Hub. Expertise in monitoring/observability: Application Insights, KQL, Log Analytics. SC Cleared (essential More ❯

high-performing apps that help our users manage their money effortlessly. Essential skills: 3+ years of experience in React Native development. Strong JavaScript/TypeScript skills. Experience integrating with REST APIs and/or GraphQL. Familiarity with native mobile development (Swift, Objective-C, Java, or Kotlin) is a plus. Understanding of mobile UI/UX best practices. Passion for fintech More ❯

high-performing apps that help our users manage their money effortlessly. Essential skills: 3+ years of experience in React Native development. Strong JavaScript/TypeScript skills. Experience integrating with REST APIs and/or GraphQL. Familiarity with native mobile development (Swift, Objective-C, Java, or Kotlin) is a plus. Understanding of mobile UI/UX best practices. Passion for fintech More ❯

day per week onsite in London) Workday Integrations Specialist – Responsibilities & Experience: Lead the design, build and maintenance of integrations using Workday Studio, EIB, Core Connectors and Workday Web Services (REST/SOAP APIs) Manage data mapping, transformation, schedules and error handling to maintain data integrity and business continuity Support implementation activity, collaborating with HR, Payroll, Finance, IT and external vendors More ❯

organisation. Contract details: 700 DR Inside IR35 12 month contract ASAP start date Hybrid - as and when required in London (infrequent travel) Skillset: Background in Software Architecture API design (REST is preferable). ++ Designing for use with User Interfaces would be a plus. Event-driven architecture patterns Familiarity with AWS and Kubernetes (Containers) would be a bonus SQL and More ❯

organisation. Contract details: 700 DR Inside IR35 12 month contract ASAP start date Hybrid - as and when required in London (infrequent travel) Skillset: Background in Software Architecture API design (REST is preferable). ++ Designing for use with User Interfaces would be a plus. Event-driven architecture patterns Familiarity with AWS and Kubernetes (Containers) would be a bonus SQL and More ❯

Experience Cloud, etc.). Deep, hands-on expertise in Apex, Lightning Web Components, and declarative automation tools (Flow, Process Builder). Extensive experience designing and architecting complex integration patterns (REST/SOAP APIs, middleware like MuleSoft) and data migration strategies. Strong understanding of key architectural concepts: governance, identity, security, and platform limits. Skills: Exceptional communication, presentation, and interpersonal skills. Proven More ❯

Experience Cloud, etc.). Deep, hands-on expertise in Apex, Lightning Web Components, and declarative automation tools (Flow, Process Builder). Extensive experience designing and architecting complex integration patterns (REST/SOAP APIs, middleware like MuleSoft) and data migration strategies. Strong understanding of key architectural concepts: governance, identity, security, and platform limits. Skills: Exceptional communication, presentation, and interpersonal skills. Proven More ❯

frameworks (React or similar). A proven track record of delivering polished, performant, and elegant user interfaces. Deep appreciation for UI/UX craftsmanship and accessibility. Familiarity with HTTP, REST APIs, websockets, and secure frontend patterns. A creative streak — you think visually and love turning complexity into clarity. Nice-to-haves Experience with 3D or WebGL rendering , or other data More ❯

frameworks (React or similar). A proven track record of delivering polished, performant, and elegant user interfaces. Deep appreciation for UI/UX craftsmanship and accessibility. Familiarity with HTTP, REST APIs, websockets, and secure frontend patterns. A creative streak — you think visually and love turning complexity into clarity. Nice-to-haves Experience with 3D or WebGL rendering , or other data More ❯

feedback to Product teams to influence roadmap and feature development. Key Requirements Extensive experience in presales or solutions engineering roles, ideally within fintech or payments. Strong working knowledge of REST APIs, SWIFT, and local/global payment networks. Proven ability to close commercial deals via consultative and solution-led sales approaches. Strong written and verbal communication skills, with the ability More ❯

feedback to Product teams to influence roadmap and feature development. Key Requirements Extensive experience in presales or solutions engineering roles, ideally within fintech or payments. Strong working knowledge of REST APIs, SWIFT, and local/global payment networks. Proven ability to close commercial deals via consultative and solution-led sales approaches. Strong written and verbal communication skills, with the ability More ❯

is modern, collaborative, and values clean, scalable software that solves real business problems. Tech Stack: C#/.NET Core Angular (or similar SPA frameworks) SQL Server/Entity Framework REST APIs/Swagger Git/Bitbucket What You’ll Get: A hybrid role with a central London HQ Exposure to complex business systems A collaborative, supportive team that values clean More ❯

is modern, collaborative, and values clean, scalable software that solves real business problems. Tech Stack: C#/.NET Core Angular (or similar SPA frameworks) SQL Server/Entity Framework REST APIs/Swagger Git/Bitbucket What You’ll Get: A hybrid role with a central London HQ Exposure to complex business systems A collaborative, supportive team that values clean More ❯