Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
45 API jobs in Welwyn Garden City + 20 miles
443 exact matches jobs are outside your preferred location
Design, build, and operate Python/FastAPI-based API services deployed on AWS ECS * Own API design, performance optimization, security, and observability * APIs: REST API design, performance optimization, security, observability
Design, build, and operate Python/FastAPI-based API services deployed on AWS ECS * Own API design, performance optimization, security, and observability * APIs: REST API design, performance optimization, security, observability
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.
Extensive ability to read and understand and compile technical documentation (API documentation, ERD, functional specifications etc).
Extensive ability to read and understand and compile technical documentation (API documentation, ERD, functional specifications etc).
NEW
Senior Site Reliability Engineer, Managed Kubernetes - Europe
Senior Site Reliability Engineer, Managed Kubernetes - Europe
Lambda Group Limited
London
£161,000 - £310,000 a year
Proven experience provisioning Kubernetes using tools such as kubeadm, Cluster API, or similar
Proven experience provisioning Kubernetes using tools such as kubeadm, Cluster API, or similar
NEW
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
Currently, our micro-services communicate via REST API calls, fostering seamless integration between different services.
Currently, our micro-services communicate via REST API calls, fostering seamless integration between different services.
We are building the first European Investment API that empowers businesses to offer seamless investment experiences to their users. We are looking for a full-time Head of Engineering to help us build a securities API for financial institutions, the first API of that kind in Europe. These teams are responsible for critical domains such as Orders, Trading Partner integrations, Position, and Wealth Management, all of which are essential for Upvests Investment API. The Brokerage Tribe plays a crucial role in the Investment API Platform, overseeing a wide range of user journey aspects. * Assume ownership of business-critical components within the Investment API, influencing its roadmap and delivering strategic impact to establish Upvest as a reliable partner. * Experience
We are building the first European Investment API that empowers businesses to offer seamless investment experiences to their users. We are looking for a full-time Head of Engineering to help us build a securities API for financial institutions, the first API of that kind in Europe. These teams are responsible for critical domains such as Orders, Trading Partner integrations, Position, and Wealth Management, all of which are essential for Upvests Investment API. The Brokerage Tribe plays a crucial role in the Investment API Platform, overseeing a wide range of user journey aspects. * Assume ownership of business-critical components within the Investment API, influencing its roadmap and delivering strategic impact to establish Upvest as a reliable partner. * Experience
NEW
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.
Manager Data Engineering
Manager Data Engineering
LEXISNEXIS RISK SOLUTIONS UK LIMITED T/a LexisNexis Risk Solutions Group
London
Competitive
Experience with API design, integration, and management.
Experience with API design, integration, and management.
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.
Experience developing and integrating with Azure Services (e.g. Azure Functions, App Services, Entra ID, Cosmos DB, API Management, Redis, App Configuration).
Experience developing and integrating with Azure Services (e.g. Azure Functions, App Services, Entra ID, Cosmos DB, API Management, Redis, App Configuration).
Experience developing and integrating with Azure Services (e.g. Azure Functions, App Services, Entra ID, Cosmos DB, API Management, Redis, App Configuration).
Experience developing and integrating with Azure Services (e.g. Azure Functions, App Services, Entra ID, Cosmos DB, API Management, Redis, App Configuration).
)
Join NVIDIA's DGX Cloud Kubernetes API Services team and be at the forefront of building GPU-accelerated Kubernetes clusters supporting NVIDIA AI, robotics, and scientific computing projects. As an API Services Software Engineer, you will work across the stack with partner teams to bring NVIDIA's GPUs to life in a cloud or on-prem environment, ensuring end-to-end performance across compute, storage, and networking. An API Services engineer is above all responsible for ensuring a good customer and developer experience on the DGX Cloud Kubernetes Platform, working with our Runtime and Cluster Architecture teams and more to be the voice of the customer. We serve both customers looking to access their GPU compute via Kubernetes for whatever workloads they wish, as well as developers looking to use our API
Join NVIDIA's DGX Cloud Kubernetes API Services team and be at the forefront of building GPU-accelerated Kubernetes clusters supporting NVIDIA AI, robotics, and scientific computing projects. As an API Services Software Engineer, you will work across the stack with partner teams to bring NVIDIA's GPUs to life in a cloud or on-prem environment, ensuring end-to-end performance across compute, storage, and networking. An API Services engineer is above all responsible for ensuring a good customer and developer experience on the DGX Cloud Kubernetes Platform, working with our Runtime and Cluster Architecture teams and more to be the voice of the customer. We serve both customers looking to access their GPU compute via Kubernetes for whatever workloads they wish, as well as developers looking to use our API
NEW
)
Strong experience in Bash scripting and API scripting.
Strong experience in Bash scripting and API scripting.
)
Senior Software Developer
Senior Software Developer
Inspire People
UK
£49600 - £60800 per annum + 29% pension + Civil Service benefits
Solid understanding of system design, API development and integration practices
Solid understanding of system design, API development and integration practices
)
Design, build and maintain data-intensive web applications and API-driven systems
Design, build and maintain data-intensive web applications and API-driven systems
NEW
)
Strong technical skills: HTML, CSS, basic JavaScript, API integrations, Workato and troubleshooting.
Strong technical skills: HTML, CSS, basic JavaScript, API integrations, Workato and troubleshooting.
NEW
)
Expertise in JavaScript and/or TypeScript and modern React, including Hooks, Context API, Server and Client Components
Expertise in JavaScript and/or TypeScript and modern React, including Hooks, Context API, Server and Client Components
NEW
)
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
)
Expertise in Salesforce deployment strategies, including change sets, Salesforce DX, and metadata API. * Experience in Salesforce API integration (REST, SOAP, Platform Events).
Expertise in Salesforce deployment strategies, including change sets, Salesforce DX, and metadata API. * Experience in Salesforce API integration (REST, SOAP, Platform Events).
NEW