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Locations
Locations
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Date posted
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14 Contract API jobs in The City, City of London + 20 miles
120 exact matches jobs are outside your preferred location
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Location: Windsor, UK (Hybrid - 1 day per week in office) Contract: 6 months - Rate: £510 per day - Start Date: 15th September 2025 - About the Role - We are seeking an experienced Salesforce Vlocity Developer to join a major business unit on a contract basis. The successful candidate will be responsible for designing, developing, and implementing tailored Vlocity solutions within the Salesforce platform, with a particular focus on Energy & Utility Cloud. This is a hybrid role requiring one day per week in the Windsor office. Key Responsibilities - Design and develop custom Vlocity solutions including CPQ, CLM, and OmniStudio. - Translate product requirements into high-quality technical specifications. - Build and maintain Vlocity data models (objects, fields, relationships). - Develop custom Apex classes, triggers, and Visualforce pages to extend Salesforce functiona
Location: Windsor, UK (Hybrid - 1 day per week in office) Contract: 6 months - Rate: £510 per day - Start Date: 15th September 2025 - About the Role - We are seeking an experienced Salesforce Vlocity Developer to join a major business unit on a contract basis. The successful candidate will be responsible for designing, developing, and implementing tailored Vlocity solutions within the Salesforce platform, with a particular focus on Energy & Utility Cloud. This is a hybrid role requiring one day per week in the Windsor office. Key Responsibilities - Design and develop custom Vlocity solutions including CPQ, CLM, and OmniStudio. - Translate product requirements into high-quality technical specifications. - Build and maintain Vlocity data models (objects, fields, relationships). - Develop custom Apex classes, triggers, and Visualforce pages to extend Salesforce functiona
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SuiteCRM Developer - £420p/d Inside IR35 - Remote / UK Based
SuiteCRM Developer - £420p/d Inside IR35 - Remote / UK Based
Exalto Consulting ltd
London
£420p/d Inside IR35
Building and maintaining API integrations (REST/SOAP)
Building and maintaining API integrations (REST/SOAP)
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REST API development
REST API development
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Excellent API testing experience using Postman, IntelliJ Http Client, or similar tools.
Excellent API testing experience using Postman, IntelliJ Http Client, or similar tools.
PREMIUM
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Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
Lead the design and development of automated UI and API testing solutions using SpecFlow and Playwright, written in C# .NET.
NEWFEATURED
We are looking for a Staff Software Engineer to join Datadog's API Platform group. This team owns the infrastructure and tooling behind our public API surface, which spans more than 7,000 endpoints and supports a vast range of customers and integrations. As a Staff Engineer, you will have the opportunity to contribute to a broad set of projects across multiple teams that support API routing, reliability, web frameworks, and large-scale automation. You will collaborate with teams that build and evolve internal frameworks, traffic shaping and routing logic, reliability tooling, and developer enablement for API infrastructure. * Lead technical direction across multiple teams spanning API routing, rate limiting, frameworks, reliability tooling, and infrastructure automation. * Help define
We are looking for a Staff Software Engineer to join Datadog's API Platform group. This team owns the infrastructure and tooling behind our public API surface, which spans more than 7,000 endpoints and supports a vast range of customers and integrations. As a Staff Engineer, you will have the opportunity to contribute to a broad set of projects across multiple teams that support API routing, reliability, web frameworks, and large-scale automation. You will collaborate with teams that build and evolve internal frameworks, traffic shaping and routing logic, reliability tooling, and developer enablement for API infrastructure. * Lead technical direction across multiple teams spanning API routing, rate limiting, frameworks, reliability tooling, and infrastructure automation. * Help define
Lead Software Engineer - LLM/AI/ML Solutions - Python/Typescript/Nodejs - API Development (Hybrid)
Lead Software Engineer - LLM/AI/ML Solutions - Python/Typescript/Nodejs - API Development (Hybrid)
FactSet Europe Ltd
London
Competitive
Proficient in Python/Typescript/Nodejs, with strong skills in API development.
Proficient in Python/Typescript/Nodejs, with strong skills in API development.
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Act as SME for NW-API across Enterprise Sales, Partnerships, Alliances, and Solution Engineers globally (EMEA, US, APAC). * Maintain expert-level knowledge of NW-API platforms/solutions and communicate value propositions as a recognised industry leader. * Lead client engagements to operationalise and scale NW-API and fraud prevention solutions, driving new revenue opportunities.
Act as SME for NW-API across Enterprise Sales, Partnerships, Alliances, and Solution Engineers globally (EMEA, US, APAC). * Maintain expert-level knowledge of NW-API platforms/solutions and communicate value propositions as a recognised industry leader. * Lead client engagements to operationalise and scale NW-API and fraud prevention solutions, driving new revenue opportunities.
Proficiency in API integration, data modelling, data migration, and experience with cloud-based architectures.
Proficiency in API integration, data modelling, data migration, and experience with cloud-based architectures.
Collaborating with clients, applying a strong consultative approach, adding true value with both your Architectural skillset and demonstrated experience selling the metrics of a good API strategy to senior business and IT stakeholders.
Collaborating with clients, applying a strong consultative approach, adding true value with both your Architectural skillset and demonstrated experience selling the metrics of a good API strategy to senior business and IT stakeholders.
At Mitratech, we are a team of technologists focused on building world-class products that simplify operations in the Legal, Risk, Compliance, and HR functions. We are a close-knit, globally dispersed team that thrives in an ecosystem that supports individual excellence and takes pride in its diverse and inclusive work culture centered around great people practices, learning opportunities, and having fun! Our culture is the ideal blend of entrepreneurial spirit and enterprise investment, enabling the chance to move at a rapid pace with some of the most complex, leading-edge technologies available. For over 35 years, the experts at Mitratech have been focused on solving the complex needs. Today, we serve 20,000 client companies of all sizes globally, representing 30% of the Fortune 500 and over 500,000 users in over 160 countries.
At Mitratech, we are a team of technologists focused on building world-class products that simplify operations in the Legal, Risk, Compliance, and HR functions. We are a close-knit, globally dispersed team that thrives in an ecosystem that supports individual excellence and takes pride in its diverse and inclusive work culture centered around great people practices, learning opportunities, and having fun! Our culture is the ideal blend of entrepreneurial spirit and enterprise investment, enabling the chance to move at a rapid pace with some of the most complex, leading-edge technologies available. For over 35 years, the experts at Mitratech have been focused on solving the complex needs. Today, we serve 20,000 client companies of all sizes globally, representing 30% of the Fortune 500 and over 500,000 users in over 160 countries.
Experience in API (REST, GraphQL) design and development
Experience in API (REST, GraphQL) design and development
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RESPONSABILITIES Translate business and technical needs into clear product requirements, including user stories, acceptance criteria, and data schemas; Prioritize data features and deliverables based on impact, effort, and strategic alignment; Define and enforce data quality standards (accuracy, completeness, timeliness) for published data sets; Collaborate with engineering and governance teams on lineage, metadata, access controls, and compliance (e.g., GDPR); Develop and maintain a data-product roadmap with versioning, documentation, and API endpoints; Craft external documentation such as data dictionaries, schema definitions, sample queries, and usage guides; Define and track adoption metrics (API calls, downloads, user feedback); Facilitate agile ceremonies to align teams on data-product goals; Mentor junior product team members o
RESPONSABILITIES Translate business and technical needs into clear product requirements, including user stories, acceptance criteria, and data schemas; Prioritize data features and deliverables based on impact, effort, and strategic alignment; Define and enforce data quality standards (accuracy, completeness, timeliness) for published data sets; Collaborate with engineering and governance teams on lineage, metadata, access controls, and compliance (e.g., GDPR); Develop and maintain a data-product roadmap with versioning, documentation, and API endpoints; Craft external documentation such as data dictionaries, schema definitions, sample queries, and usage guides; Define and track adoption metrics (API calls, downloads, user feedback); Facilitate agile ceremonies to align teams on data-product goals; Mentor junior product team members o
Add support for new/future API/input language features
Add support for new/future API/input language features
Working knowledge of creating data connections - e.g. SQL and relational databases, DataBricks, JSON files, API services, Data Lakes
Working knowledge of creating data connections - e.g. SQL and relational databases, DataBricks, JSON files, API services, Data Lakes
Proficiency in Python (especially API packages), SQL, Power BI, and Power Automate
Proficiency in Python (especially API packages), SQL, Power BI, and Power Automate
Software Engineer, Data – Query Intelligence & Infrastructure - 6 Month Contract
Software Engineer, Data – Query Intelligence & Infrastructure - 6 Month Contract
Benchsci U.K. Limited
London
Competitive
Your work will involve API development, performance optimization, and maintaining high-performance access to large, interconnected datasets.
Your work will involve API development, performance optimization, and maintaining high-performance access to large, interconnected datasets.
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Play a key role in the Practice Management team contributing to frontend, API and infrastructure tasks. * You have experience building and architecting RESTful and GraphQL APIs as well as designing and implementing API integrations.
Play a key role in the Practice Management team contributing to frontend, API and infrastructure tasks. * You have experience building and architecting RESTful and GraphQL APIs as well as designing and implementing API integrations.
Data Access and Availability: Control and manage access to data for internal and external stakeholders, working with our tech and API teams to ensure seamless data transfer.
Data Access and Availability: Control and manage access to data for internal and external stakeholders, working with our tech and API teams to ensure seamless data transfer.
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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)
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Through our platform a merchant can connect via a simple API connection to the world's payment ecosystem, increasing conversion at lower cost and satisfying their entire payments needs.
Through our platform a merchant can connect via a simple API connection to the world's payment ecosystem, increasing conversion at lower cost and satisfying their entire payments needs.
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You can translate rulebooks or API specs into requirements
You can translate rulebooks or API specs into requirements
Serverless (Lambda, API Gateway, EventBridge, Step Functions) and container platforms (ECS/EKS).
Serverless (Lambda, API Gateway, EventBridge, Step Functions) and container platforms (ECS/EKS).
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Prompt engineering, LLM API integration, and system reliability patterns
Prompt engineering, LLM API integration, and system reliability patterns
Experience of technical areas and tooling when testing on mobile: Network tools, performance tools, analytics tools, API test tooling.
Experience of technical areas and tooling when testing on mobile: Network tools, performance tools, analytics tools, API test tooling.