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142 API jobs in St. Albans + 20 miles
636 exact matches jobs are outside your preferred location
Full-Stack Integration : Experience bridging frontend and backend systems, including API design, data flow optimisation, and end-to-end feature development.
Full-Stack Integration : Experience bridging frontend and backend systems, including API design, data flow optimisation, and end-to-end feature development.
Document integration flows, including API specs, data mapping, and system interactions
Document integration flows, including API specs, data mapping, and system interactions
Conduct application security testing, including API and web service assessments.
Conduct application security testing, including API and web service assessments.
Strong understanding of API design
Strong understanding of API design
3+ years of full stack Python + .NET C# (backend) development experience with in-depth knowledge of ORM and API frameworks * Experience using Python libraries such as Fast API, SQL Alchemy and Pydantic is mandatory
3+ years of full stack Python + .NET C# (backend) development experience with in-depth knowledge of ORM and API frameworks * Experience using Python libraries such as Fast API, SQL Alchemy and Pydantic is mandatory
Be it UI users, API users or our own developers.
Be it UI users, API users or our own developers.
Knowledge of creation of API documentation using YAML specifications.
Knowledge of creation of API documentation using YAML specifications.
Experience with API design (e.g. Swagger) and championing well-defined and documented APIs.
Experience with API design (e.g. Swagger) and championing well-defined and documented APIs.
Basic understanding of backend development principles and RESTful API design.
Basic understanding of backend development principles and RESTful API design.
Familiarity with basic API requests will also be highly valuable.
Familiarity with basic API requests will also be highly valuable.
Provide maximal visibility to merchants on their historical and upcoming settlements through dashboards and API * Experience API products and/or within a broader FinTech company.
Provide maximal visibility to merchants on their historical and upcoming settlements through dashboards and API * Experience API products and/or within a broader FinTech company.
The OpenPayd platform delivers a suite of banking and payments infrastructure: accounts in over 40 currencies, FX, on/off ramp, international and domestic payments, Open Banking services all via a single API. o Strong understanding of APIs; experience in API usage is mandatory.
The OpenPayd platform delivers a suite of banking and payments infrastructure: accounts in over 40 currencies, FX, on/off ramp, international and domestic payments, Open Banking services all via a single API. o Strong understanding of APIs; experience in API usage is mandatory.
Ability to design and build end-to-end applications and API integrations.
Ability to design and build end-to-end applications and API integrations.
Have advanced experience with bid management, automation tools, and a strong history of implementing or amending Google/Microsoft Ads Scripts (or equivalent API solutions).
Have advanced experience with bid management, automation tools, and a strong history of implementing or amending Google/Microsoft Ads Scripts (or equivalent API solutions).
Perform hands-on implementation with the ServiceNow platform, leveraging all ServiceNow technologies and capabilities: Workflow Studio/ Flow Designer, JavaScript, REST/SOAP API integrations (incl. MID Servers), Single Sign-On and more
Perform hands-on implementation with the ServiceNow platform, leveraging all ServiceNow technologies and capabilities: Workflow Studio/ Flow Designer, JavaScript, REST/SOAP API integrations (incl. MID Servers), Single Sign-On and more
Mentor AI Application Engineers and other team members, guiding them on backend, API, and AI/ML integration patterns. * Strong knowledge of SaaS integrations and API development (REST, GraphQL).
Mentor AI Application Engineers and other team members, guiding them on backend, API, and AI/ML integration patterns. * Strong knowledge of SaaS integrations and API development (REST, GraphQL).
Our products include the Dune app for dashboards, the Analytics API, and Datashare.
Our products include the Dune app for dashboards, the Analytics API, and Datashare.
This includes the Dune app for dashboards, our Analytics API, and Datashare services offering onchain data across 100+ EVM/non-EVM chains. * Define positioning and messaging for Dunes analytics products, including the app, Analytics API, and Datashare, across EVM chains and major ecosystems and key datasets like dex.trades, prices.usd, and tokens.transfers.
This includes the Dune app for dashboards, our Analytics API, and Datashare services offering onchain data across 100+ EVM/non-EVM chains. * Define positioning and messaging for Dunes analytics products, including the app, Analytics API, and Datashare, across EVM chains and major ecosystems and key datasets like dex.trades, prices.usd, and tokens.transfers.
Typing is used within our Python stack to power automated documentation and API definitions * Have hands-on experience designing data flow through software, from persistent storage to API endpoints, while applying industry best practices for validation
Typing is used within our Python stack to power automated documentation and API definitions * Have hands-on experience designing data flow through software, from persistent storage to API endpoints, while applying industry best practices for validation
Implementation of Salesforce Flows to a high standard (e.g. screen flows, triggered flows, API flows)
Implementation of Salesforce Flows to a high standard (e.g. screen flows, triggered flows, API flows)
Experience writing effective unit and integration tests, including API mocks.
Experience writing effective unit and integration tests, including API mocks.
API & Integration Development Build secure, scalable APIs to connect EnvisionOS with platforms like ServiceNow, Snowflake, and monitoring systems. * Proven experience with API development (REST, GraphQL) and frameworks like Flask, FastAPI, or Spring.
API & Integration Development Build secure, scalable APIs to connect EnvisionOS with platforms like ServiceNow, Snowflake, and monitoring systems. * Proven experience with API development (REST, GraphQL) and frameworks like Flask, FastAPI, or Spring.
Join the API Revolution at Gravitee - Where Innovation Meets Growth - Since our beginnings in 2015, Gravitee has grown into a global force, recognised as a Gartner Magic Quadrant Leader for API Management in 2024 and 2025! 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. Gravitee.io is taking APIs to the next level, we are the premier, open-source API platform and we want everyone to know how amazing our software is. * API Integration & Development: Leverage REST APIs to connect disparate systems, troubleshoot integration issues, and ens
Join the API Revolution at Gravitee - Where Innovation Meets Growth - Since our beginnings in 2015, Gravitee has grown into a global force, recognised as a Gartner Magic Quadrant Leader for API Management in 2024 and 2025! 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. Gravitee.io is taking APIs to the next level, we are the premier, open-source API platform and we want everyone to know how amazing our software is. * API Integration & Development: Leverage REST APIs to connect disparate systems, troubleshoot integration issues, and ens
Design, develop, and execute automated test scripts on communication/API layers. * Extensive experience in developing coded API tests with PactumJS, SpecFlow, REST Assured or similar
Design, develop, and execute automated test scripts on communication/API layers. * Extensive experience in developing coded API tests with PactumJS, SpecFlow, REST Assured or similar
.Net Full Stack Engineer - Consultant/Senior Consultant - Digital Excellence
.Net Full Stack Engineer - Consultant/Senior Consultant - Digital Excellence
Capgemini Invent
London
Competitive
At Capgemini Invent, we believe difference drives change. As inventive transformation consultants, we blend our strategic, creative and scientific capabilities, collaborating closely with clients to deliver cutting-edge solutions. Join us to drive transformation tailored to our client's challenges of today and tomorrow. Informed and validated by science and data. Superpowered by creativity and design. All underpinned by technology created with purpose. Our C#/.NET Full Stack Engineers are responsible for creating the visions of our clients and driving better business outcomes. They are tasked with building cutting-edge digital solutions for our clients, combining a clear understanding of business value and a consultative approach to make the difference. They will be able to work on a vast variety of projects and get exposure to a variety of technology such as (but not
At Capgemini Invent, we believe difference drives change. As inventive transformation consultants, we blend our strategic, creative and scientific capabilities, collaborating closely with clients to deliver cutting-edge solutions. Join us to drive transformation tailored to our client's challenges of today and tomorrow. Informed and validated by science and data. Superpowered by creativity and design. All underpinned by technology created with purpose. Our C#/.NET Full Stack Engineers are responsible for creating the visions of our clients and driving better business outcomes. They are tasked with building cutting-edge digital solutions for our clients, combining a clear understanding of business value and a consultative approach to make the difference. They will be able to work on a vast variety of projects and get exposure to a variety of technology such as (but not