Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
13 Contract API jobs in Welwyn Garden City + 20 miles
190 exact matches jobs are outside your preferred location
The responsibilities are cross-functional, ranging from infrastructure, API design & coding all the way to client-side integration(we are using Golang).
The responsibilities are cross-functional, ranging from infrastructure, API design & coding all the way to client-side integration(we are using Golang).
Familiarity with API-based integrations and middleware platforms including SFTP file transfers.
Familiarity with API-based integrations and middleware platforms including SFTP file transfers.
NEW
M365/Azure API integrations.
M365/Azure API integrations.
Experience with REST API development and microservices architectures
Experience with REST API development and microservices architectures
Upvests Investment API is easy to integrate so that fintechs and enterprises alike can save resources and fully focus on their core business.? Our Marketing team ensures Upvests Investment API is widely recognised as the best on the market. * 5+ years of product marketing experience in B2B SaaS, ideally within fintech, investments, or API-driven infrastructure.
Upvests Investment API is easy to integrate so that fintechs and enterprises alike can save resources and fully focus on their core business.? Our Marketing team ensures Upvests Investment API is widely recognised as the best on the market. * 5+ years of product marketing experience in B2B SaaS, ideally within fintech, investments, or API-driven infrastructure.
Technology Stack Proficiency : Experienced in Microsoft technologies (C#, ASP.NET Core, Web API), JavaScript (AngularJS or React), and Azure Microservices.
Technology Stack Proficiency : Experienced in Microsoft technologies (C#, ASP.NET Core, Web API), JavaScript (AngularJS or React), and Azure Microservices.
NEW
Implement and maintain Azure Firewall, API Management (APIM), Databases, Service Bus, and Event Grid.
Implement and maintain Azure Firewall, API Management (APIM), Databases, Service Bus, and Event Grid.
Understanding and/or experience in managing API-based software businesses
Understanding and/or experience in managing API-based software businesses
Youll join the team responsible for running the core infrastructure that supports products like ChatGPT and the API.
Youll join the team responsible for running the core infrastructure that supports products like ChatGPT and the API.
The Runa API empowers thousands of businesses to make payments to 5 billion+ consumers in 190+ countries instantly to cards, wallets, bank accounts and gift cards.
The Runa API empowers thousands of businesses to make payments to 5 billion+ consumers in 190+ countries instantly to cards, wallets, bank accounts and gift cards.
NEW
Software Engineer - (Machine Learning Experience a plus) - hybrid
Software Engineer - (Machine Learning Experience a plus) - hybrid
FactSet Europe Ltd
London
Competitive
Proficiency with API design
Proficiency with API design
Uphold high standards for our uptime and latency requirements while not sacrificing the veracity of API responses
Uphold high standards for our uptime and latency requirements while not sacrificing the veracity of API responses
Collaborate with ML Engineering to enhance model sophistication, ensuring seamless integration with Radar API and establishing robust MLOps pipelines for scalable deployment.
Collaborate with ML Engineering to enhance model sophistication, ensuring seamless integration with Radar API and establishing robust MLOps pipelines for scalable deployment.
Frontend and API testing,
Frontend and API testing,
Date: 30 Sept 2025 - Location: London, GB, EC2V 7AD - Company: Paysafe - Paysafe is a leading payments platform with an extensive track record of serving merchants and consumers in the global entertainment sectors. Its core purpose is to enable businesses and consumers to connect and transact seamlessly through industry-leading capabilities in payment processing, digital wallet, and online cash solutions. With 29 years of online payment experience, an annualized transactional volume of $152 billion in 2024, and approximately 3,300 employees located in 12+ countries, Paysafe connects businesses and consumers across 260 payment types in 48 currencies around the world. Delivered through an integrated platform, Paysafe solutions are geared toward mobile-initiated transactions, real-time analytics and the convergence between brick-and-mortar and online payments.
Date: 30 Sept 2025 - Location: London, GB, EC2V 7AD - Company: Paysafe - Paysafe is a leading payments platform with an extensive track record of serving merchants and consumers in the global entertainment sectors. Its core purpose is to enable businesses and consumers to connect and transact seamlessly through industry-leading capabilities in payment processing, digital wallet, and online cash solutions. With 29 years of online payment experience, an annualized transactional volume of $152 billion in 2024, and approximately 3,300 employees located in 12+ countries, Paysafe connects businesses and consumers across 260 payment types in 48 currencies around the world. Delivered through an integrated platform, Paysafe solutions are geared toward mobile-initiated transactions, real-time analytics and the convergence between brick-and-mortar and online payments.
AWS API Gateway
AWS API Gateway
Capable of diagnosing and resolving tracking, data, and audience issues, including pixel implementation, UTM structure, and conversion API setup.
Capable of diagnosing and resolving tracking, data, and audience issues, including pixel implementation, UTM structure, and conversion API setup.
Modern tech stack experience - Demonstrable experience with cloud platforms (preferably AWS), containerisation (Docker, Kubernetes), and API design (gRPC, REST).
Modern tech stack experience - Demonstrable experience with cloud platforms (preferably AWS), containerisation (Docker, Kubernetes), and API design (gRPC, REST).
At the time of inception, cloud-based systems and API fluency were new.
At the time of inception, cloud-based systems and API fluency were new.
)
Strong experience in Bash scripting and API scripting.
Strong experience in Bash scripting and API scripting.
)
Role: Solutions Architect - Location: Hybrid, Hampshire - Salary: Competitive (Outside IR35) Type 5 month Contract - Myn is an AI driven marketplace that connects the candidates, clients and recruiters. Myn collaborates with leading employers to offer exclusive, carefully matched contract and permanent positions. Our Recruitment Partners all have extensive industry experience, and work with a select group of niche clients, to deliver the best possible experience to the candidate. Our client is a specialist technology consultancy delivering high-impact digital transformation across UK Central Government and Defence. Theyre looking for a Senior Solution Architect who can set technical direction on projects that genuinely shape national infrastructure and public-sector capability. Youll be right at the intersection of strategy and engineering, guiding multidisciplinary t
Role: Solutions Architect - Location: Hybrid, Hampshire - Salary: Competitive (Outside IR35) Type 5 month Contract - Myn is an AI driven marketplace that connects the candidates, clients and recruiters. Myn collaborates with leading employers to offer exclusive, carefully matched contract and permanent positions. Our Recruitment Partners all have extensive industry experience, and work with a select group of niche clients, to deliver the best possible experience to the candidate. Our client is a specialist technology consultancy delivering high-impact digital transformation across UK Central Government and Defence. Theyre looking for a Senior Solution Architect who can set technical direction on projects that genuinely shape national infrastructure and public-sector capability. Youll be right at the intersection of strategy and engineering, guiding multidisciplinary t
)
Job Title: SPM ServiceNow Developer - Location: Remote (Work from Home - UK) Job Type: Contract (Inside IR35) Duration: 12 Months Job Summary: Join Tata Consultancy Services (TCS) as an SPM ServiceNow Developer and be at the forefront of digital transformation. Work on innovative projects for some of the world's leading brands, making a meaningful impact in a dynamic, agile environment. Your expertise will help drive efficiency and optimization through the ServiceNow platform. * Work closely with the ServiceNow Solutions Architect to design and implement requirements from the SPM Process Team. * Develop, configure, and maintain the ServiceNow platform, primarily within the SPM (Strategic Portfolio Management) module. * Configure and customize the ServiceNow platform using JavaScript and ServiceNow APIs to extend capabilities and enhance user experience.
Job Title: SPM ServiceNow Developer - Location: Remote (Work from Home - UK) Job Type: Contract (Inside IR35) Duration: 12 Months Job Summary: Join Tata Consultancy Services (TCS) as an SPM ServiceNow Developer and be at the forefront of digital transformation. Work on innovative projects for some of the world's leading brands, making a meaningful impact in a dynamic, agile environment. Your expertise will help drive efficiency and optimization through the ServiceNow platform. * Work closely with the ServiceNow Solutions Architect to design and implement requirements from the SPM Process Team. * Develop, configure, and maintain the ServiceNow platform, primarily within the SPM (Strategic Portfolio Management) module. * Configure and customize the ServiceNow platform using JavaScript and ServiceNow APIs to extend capabilities and enhance user experience.
NEW
)
Contract Role: Prompt Engineer (Salesforce & Generative AI Integration) Duration: 4–5 months (November – March) Hourly Rate: £54.60 - £60/hour inside IR35 - Location: Fully Remote (UK-based candidates only) Overview - We are seeking a highly skilled Prompt Engineer with deep expertise in the Salesforce platform and hands-on experience in Generative AI integration. This role bridges the gap between business requirements and intelligent automation, crafting high-impact prompts and embedding AI capabilities into Salesforce workflows to enhance customer experience and operational efficiency. Key Responsibilities - Salesforce Platform Expertise * Design and configure Salesforce objects, data models, and automation using Flows, Apex, and Lightning Web Components (LWC). * Leverage Service Cloud and Sales Cloud functionality to support AI-driven use cases.
Contract Role: Prompt Engineer (Salesforce & Generative AI Integration) Duration: 4–5 months (November – March) Hourly Rate: £54.60 - £60/hour inside IR35 - Location: Fully Remote (UK-based candidates only) Overview - We are seeking a highly skilled Prompt Engineer with deep expertise in the Salesforce platform and hands-on experience in Generative AI integration. This role bridges the gap between business requirements and intelligent automation, crafting high-impact prompts and embedding AI capabilities into Salesforce workflows to enhance customer experience and operational efficiency. Key Responsibilities - Salesforce Platform Expertise * Design and configure Salesforce objects, data models, and automation using Flows, Apex, and Lightning Web Components (LWC). * Leverage Service Cloud and Sales Cloud functionality to support AI-driven use cases.
NEW
Role: Senior Full Stack Engineer - Location: Remote - Salary: Competitive (Outside IR35) Type 6 month Contract - Myn is an AI driven marketplace that connects the candidates, clients and recruiters. Myn collaborates with leading employers to offer exclusive, carefully matched contract and permanent positions. Our Recruitment Partners all have extensive industry experience, and work with a select group of niche clients, to deliver the best possible experience to the candidate. Our client is a global professional services company focussed on cost reduction and programme management. They are currently looking for a skilled Full Stack Engineer to join on a 6 month project working fully remote. * Architect and implement robust backend services (Node.js, Python, or equivalent) * Build responsive, accessible front-end interfaces (React, Vue, or similar)
Role: Senior Full Stack Engineer - Location: Remote - Salary: Competitive (Outside IR35) Type 6 month Contract - Myn is an AI driven marketplace that connects the candidates, clients and recruiters. Myn collaborates with leading employers to offer exclusive, carefully matched contract and permanent positions. Our Recruitment Partners all have extensive industry experience, and work with a select group of niche clients, to deliver the best possible experience to the candidate. Our client is a global professional services company focussed on cost reduction and programme management. They are currently looking for a skilled Full Stack Engineer to join on a 6 month project working fully remote. * Architect and implement robust backend services (Node.js, Python, or equivalent) * Build responsive, accessible front-end interfaces (React, Vue, or similar)
Proficiency in data integration, API design, and user interface considerations.
Proficiency in data integration, API design, and user interface considerations.
NEW