Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
- Shadwell
- Millwall
- Shoreditch
- The City, City (EC3)
- Charing Cross
- Fivensgreen
- Gilwell Park
- Haslemere Industrial Estate
- Holloway
- Kempston
- City of London
- Central London
- West End
- East London
- Reading
- Cambridge
- Windsor
- Bedford
- Milton Keynes
- North West London
- London
- Berkshire
- Cambridgeshire
- Bedfordshire
- Buckinghamshire
- Surrey
- West Sussex
- Hampshire
- Hertfordshire
- Oxfordshire
- South East
- East Anglia
62 API jobs in Marylebone (W1) + 20 miles
)
Mobile Developer (iOS / Android) Smart Home / IoT Apps - Location: UK/EMEA (Fully Remote) Rate: £300 £400 per day - We are seeking a talented and creative Mobile Developer (iOS / Android) to join our clients fast-growing digital and smart home technology team. You will be working on the design, development, and optimisation of innovative mobile applications that power the next generation of home automation and IoT devices, used by thousands of customers daily. This is a fantastic opportunity to make an impact on high-profile projects, working within a collaborative, forward-thinking environment that blends mobile, IoT, cloud, and real-time communication technologies. Key Responsibilities * Develop, test, and deploy high-quality iOS and Android applications (native or cross-platform). * Collaborate with product managers, designers, and backend engineers to define and d
Mobile Developer (iOS / Android) Smart Home / IoT Apps - Location: UK/EMEA (Fully Remote) Rate: £300 £400 per day - We are seeking a talented and creative Mobile Developer (iOS / Android) to join our clients fast-growing digital and smart home technology team. You will be working on the design, development, and optimisation of innovative mobile applications that power the next generation of home automation and IoT devices, used by thousands of customers daily. This is a fantastic opportunity to make an impact on high-profile projects, working within a collaborative, forward-thinking environment that blends mobile, IoT, cloud, and real-time communication technologies. Key Responsibilities * Develop, test, and deploy high-quality iOS and Android applications (native or cross-platform). * Collaborate with product managers, designers, and backend engineers to define and d
)
JavaScript React Developer - London (Hybrid) 6 month contract - Rates: Negotiable - Overview - We are seeking an experienced Software Engineer to join a global technology team within a leading energy trading business. This role is suited to a developer with strong front-end expertise, solid cloud experience, and a track record of delivering business-critical applications in fast-paced environments. The ideal candidate will have excellent problem-solving skills, a user-focused mindset, and the ability to thrive in Agile delivery teams. Key Responsibilities * Design and build modern web applications using React, TypeScript, CSS, Jest/Vitest, Webpack, and Ag Grid. * Apply modern JavaScript coding, testing, debugging, and automation techniques. * Contribute to the creation and optimisation of CI/CD pipelines and deployment practices.
JavaScript React Developer - London (Hybrid) 6 month contract - Rates: Negotiable - Overview - We are seeking an experienced Software Engineer to join a global technology team within a leading energy trading business. This role is suited to a developer with strong front-end expertise, solid cloud experience, and a track record of delivering business-critical applications in fast-paced environments. The ideal candidate will have excellent problem-solving skills, a user-focused mindset, and the ability to thrive in Agile delivery teams. Key Responsibilities * Design and build modern web applications using React, TypeScript, CSS, Jest/Vitest, Webpack, and Ag Grid. * Apply modern JavaScript coding, testing, debugging, and automation techniques. * Contribute to the creation and optimisation of CI/CD pipelines and deployment practices.
)
Senior Software Engineer C# .Net - Asset Manager
Senior Software Engineer C# .Net - Asset Manager
Client Server
The City, EC4
£100000 - £150000 per annum + bonus + benefits
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
NEWPREMIUM
)
5+ years experience in working with the .NET framework, particularly with ASP.NET Core, React/React Native, C#, Web API Experience developing REST API-driven mobile first web applications
5+ years experience in working with the .NET framework, particularly with ASP.NET Core, React/React Native, C#, Web API Experience developing REST API-driven mobile first web applications
NEW
)
Implement schema registries, data contracts, and API-first data governance.
Implement schema registries, data contracts, and API-first data governance.
NEWFEATURED
Senior Security Engineer (PurView, Sentinel, Defender)
Senior Security Engineer (PurView, Sentinel, Defender)
Invitise Ltd
WC1A, Central London
Up to £70,000 per annum + Excellent Benefits
PowerShell scripting and use of Microsoft Graph API
PowerShell scripting and use of Microsoft Graph API
NEW
PowerShell scripting and use of Microsoft Graph API
PowerShell scripting and use of Microsoft Graph API
NEW
)
Staff Back End Engineer
Staff Back End Engineer
John Lewis & Partners
SW1V, South West London, SW1V 2QQ
From £75,000 to £92,000 per annum
REST API development and/or consumption.
REST API development and/or consumption.
NEW
)
Full Stack Lead Engineer
Full Stack Lead Engineer
Hunter Selection
Soho, W1
£60000 - £85000 per annum + health insurance life insurance
Restful API development - React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code | React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code | React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code
Restful API development - React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code | React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code | React | TypeScript | NodeJS | AWS | Event driven Architecture | CDK | Lambda | Cognito | S3 | SQS | Eventbridge | Restful API | API | SQL | NoSQL | messaging queues | WebSockets | DevOps | CI/CD | GitHub | WebAssembly | Infrastructure as Code
NEWFEATURED
Demonstrable experience of Application Program Interface (API) testing within Agile sprints, using tools such as Postman and/or other industry-recognized API testing tools.
Demonstrable experience of Application Program Interface (API) testing within Agile sprints, using tools such as Postman and/or other industry-recognized API testing tools.
NEW
Join the API Revolution at GraviteeWhere Innovation Meets Growth - Since our beginnings in 2015, Gravitee has grown into a global force, recognized as a 2024 Gartner Magic Quadrant Leader for API Management. What started with four developers challenging the complexities of APIs has evolved into a revolutionary platform powering API and event stream ecosystems worldwide. Be part of a team thats redefining whats possible in API management, and shaping the future of digital transformation. * Ability to work for one of the fastest-growing companies and alongside some of the most talented people in the API technology sector
Join the API Revolution at GraviteeWhere Innovation Meets Growth - Since our beginnings in 2015, Gravitee has grown into a global force, recognized as a 2024 Gartner Magic Quadrant Leader for API Management. What started with four developers challenging the complexities of APIs has evolved into a revolutionary platform powering API and event stream ecosystems worldwide. Be part of a team thats redefining whats possible in API management, and shaping the future of digital transformation. * Ability to work for one of the fastest-growing companies and alongside some of the most talented people in the API technology sector
We are looking for an ambitious, warm and inquisitive individual to join our Development team as a Quadient Inspire Developer for variable omni-channel communications. You will be reporting directly to the Head of Development. Ability to install/setup/maintain and develop Inspire Interactive. 1. Advanced in Inspire Designer - 2. Advanced in Inspire Designer Scripting - 3. Highly knowledgeable in Inspire Interactive - 4. Advanced in Inspire Scaler or Inspire Automation ( Scaler preferable but plenty of crossover and transferable skills from automation) 5. Able to create and setup new tenants / companies in Interactive - 6. Confident in creating and managing base templates within Interactive - 7. Confident in creating and managing templates within Interactive - 8. Confident in managing approval processes (an Interactive approval process) including adding basic forms to
We are looking for an ambitious, warm and inquisitive individual to join our Development team as a Quadient Inspire Developer for variable omni-channel communications. You will be reporting directly to the Head of Development. Ability to install/setup/maintain and develop Inspire Interactive. 1. Advanced in Inspire Designer - 2. Advanced in Inspire Designer Scripting - 3. Highly knowledgeable in Inspire Interactive - 4. Advanced in Inspire Scaler or Inspire Automation ( Scaler preferable but plenty of crossover and transferable skills from automation) 5. Able to create and setup new tenants / companies in Interactive - 6. Confident in creating and managing base templates within Interactive - 7. Confident in creating and managing templates within Interactive - 8. Confident in managing approval processes (an Interactive approval process) including adding basic forms to
NEW
296 exact matches jobs are outside your preferred location
)
Senior Business Analyst (API, YAML) - Software Solution - Remote (UK or Europe) My client is looking for a Senior Business Analyst to join our team and drive the successful delivery of API services and supporting documentation for an upcoming product launch. * Collaborate with product owners, engineers, and stakeholders to define and refine business requirements for API services supporting the product launch. o API specifications * Utilize business analytics and intelligence tools to provide insights and recommendations that shape API functionality and project direction. * Hands-on experience with API services (analysis, documentation, testing support). * Familiarity with JSON for API-related specifications. * Knowledge of API testing
Senior Business Analyst (API, YAML) - Software Solution - Remote (UK or Europe) My client is looking for a Senior Business Analyst to join our team and drive the successful delivery of API services and supporting documentation for an upcoming product launch. * Collaborate with product owners, engineers, and stakeholders to define and refine business requirements for API services supporting the product launch. o API specifications * Utilize business analytics and intelligence tools to provide insights and recommendations that shape API functionality and project direction. * Hands-on experience with API services (analysis, documentation, testing support). * Familiarity with JSON for API-related specifications. * Knowledge of API testing
)
React Front End Engineer (TypeScript, API's, some C#/Angular)
React Front End Engineer (TypeScript, API's, some C#/Angular)
Hays
RH6, Gatwick
£45000.0 - £60000.0 per annum + £45-60k + Package
Front End React Engineer (TypeScript, API's, some C#/Angular) We're looking for a minimum of 3+ years commercial experience working hands-on with React/TypeScript integrating API's into their Front End estate.
Front End React Engineer (TypeScript, API's, some C#/Angular) We're looking for a minimum of 3+ years commercial experience working hands-on with React/TypeScript integrating API's into their Front End estate.
NEW
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - My client is an instantly recognisable consultancy who seek a Senior Integration Developer, with active SC clearance and experience in Microsoft Dynamics 365 Finance, to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Active Security Clearance (SC) * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics.
Up to £515 per day (Inside IR35) Remote / must be UK based - 12 months - My client is an instantly recognisable consultancy who seek a Senior Integration Developer, with active SC clearance and experience in Microsoft Dynamics 365 Finance, to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Active Security Clearance (SC) * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics.
NEW
Up to £515 per day (Inside IR35) Remote / must be UK based - 3 months initially (open to extension) My client is an instantly recognisable consultancy who seek a - to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics. * Industry experience within financial services * Experience with Microsoft Power Platform (Power Automate, Powe
Up to £515 per day (Inside IR35) Remote / must be UK based - 3 months initially (open to extension) My client is an instantly recognisable consultancy who seek a - to lead the design and implementation of robust, secure, and scalable integrations for an end client. * Hands-on experience as a Senior Integration Developer, with D365 Finance integrations. * Deep knowledge of REST APIs, OData, DMF packages, and data mapping (XSLT, XML, JSON, CSV). * Proficiency in tools like Postman, Azure Logic Apps, PowerShell, and C#. * Experience with ETL processes, error handling, idempotency, and throttling. * Strong understanding of secure data handling, encryption, and compliance standards. * Familiarity with monitoring tools like Application Insights and Log Analytics. * Industry experience within financial services * Experience with Microsoft Power Platform (Power Automate, Powe
NEW
)
Business Analyst, Data Integration, Order Fulfilment
Business Analyst, Data Integration, Order Fulfilment
Harvey Nash
London
£600 - £650 per day + Inside IR35
£600- £650pd via Umbrella London (Remote) A global technology Financial Services business are currently seeking a Business Analyst to join them on a long term contract in London. The role requires excellent data integration and process change experience, alongside direct order to fulfilment/ order to cash experience. This will be alongside direct Mulesoft or SAP experience. * Experience working as a Business Analyst in a global Financial Services or Technology business * Experience working with SAP or MuleSoft * Excellent Data Integration experience * Direct Order to Fulfilment, Order to Cash experience * Very strong verbal and written communication skills If you meet these requirements please apply for immediate consideration.
£600- £650pd via Umbrella London (Remote) A global technology Financial Services business are currently seeking a Business Analyst to join them on a long term contract in London. The role requires excellent data integration and process change experience, alongside direct order to fulfilment/ order to cash experience. This will be alongside direct Mulesoft or SAP experience. * Experience working as a Business Analyst in a global Financial Services or Technology business * Experience working with SAP or MuleSoft * Excellent Data Integration experience * Direct Order to Fulfilment, Order to Cash experience * Very strong verbal and written communication skills If you meet these requirements please apply for immediate consideration.
)
Business Analyst, Data Integration, Order Fulfilment
Business Analyst, Data Integration, Order Fulfilment
Harvey Nash
London
£600 - £650 per day + Inside IR35
£600- £650pd via Umbrella London (Remote) A global technology Financial Services business are currently seeking a Business Analyst to join them on a long term contract in London. The role requires excellent data integration and process change experience, alongside direct order to fulfilment/ order to cash experience. This will be alongside direct Mulesoft or SAP experience. * Experience working as a Business Analyst in a global Financial Services or Technology business * Experience working with SAP or MuleSoft * Excellent Data Integration experience * Direct Order to Fulfilment, Order to Cash experience * Very strong verbal and written communication skills If you meet these requirements please apply for immediate consideration.
£600- £650pd via Umbrella London (Remote) A global technology Financial Services business are currently seeking a Business Analyst to join them on a long term contract in London. The role requires excellent data integration and process change experience, alongside direct order to fulfilment/ order to cash experience. This will be alongside direct Mulesoft or SAP experience. * Experience working as a Business Analyst in a global Financial Services or Technology business * Experience working with SAP or MuleSoft * Excellent Data Integration experience * Direct Order to Fulfilment, Order to Cash experience * Very strong verbal and written communication skills If you meet these requirements please apply for immediate consideration.
)
Experience with MuleSoft and API Gateways.
Experience with MuleSoft and API Gateways.
Strong knowledge of data modelling, API management, and cloud integration.
Strong knowledge of data modelling, API management, and cloud integration.
NEWFEATURED
)
.NET Framework Version 4.5 or above including strong WCF\ Web API experience
.NET Framework Version 4.5 or above including strong WCF\ Web API experience
NEW
)
.NET Framework Version 4.5 or above including strong WCF\ Web API experience
.NET Framework Version 4.5 or above including strong WCF\ Web API experience
NEW
)
Deep understanding of RESTful API design and integration
Deep understanding of RESTful API design and integration
NEW
Deep understanding of RESTful API design and integration
Deep understanding of RESTful API design and integration
NEW
Deep understanding of RESTful API design and integration
Deep understanding of RESTful API design and integration
NEW
Related Jobs
Locations
- Shadwell
- Millwall
- Shoreditch
- The City, City (EC3)
- Charing Cross
- Fivensgreen
- Gilwell Park
- Haslemere Industrial Estate
- Holloway
- Kempston
- City of London
- Central London
- West End
- East London
- Reading
- Cambridge
- Windsor
- Bedford
- Milton Keynes
- North West London
- London
- Berkshire
- Cambridgeshire
- Bedfordshire
- Buckinghamshire
- Surrey
- West Sussex
- Hampshire
- Hertfordshire
- Oxfordshire
- South East
- East Anglia