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18 Contract API jobs in Sunbury-On-Thames + 20 miles
116 exact matches jobs are outside your preferred location
At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you're a close but not exact match with the description, we hope you'll still consider applying. Want to learn more about life at Klaviyo? Lead Software AI Engineer - At Klaviyo, we believe the future of software lies not in productivity tools for human users but in software that can run and optimize itself based on outcome or reward metrics. We've built the infrastructure and application that serve as the interface between businesses and consumers. We now have over 167,000 customers, billions of consumer profiles, and hundreds of billions of customer messages and fol
At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you're a close but not exact match with the description, we hope you'll still consider applying. Want to learn more about life at Klaviyo? Lead Software AI Engineer - At Klaviyo, we believe the future of software lies not in productivity tools for human users but in software that can run and optimize itself based on outcome or reward metrics. We've built the infrastructure and application that serve as the interface between businesses and consumers. We now have over 167,000 customers, billions of consumer profiles, and hundreds of billions of customer messages and fol
Hands-on .NET experience, including C# and ASP.NET WEB API.
Hands-on .NET experience, including C# and ASP.NET WEB API.
Architect and develop scalable and performant mission critical web applications using Next.js for front-end and Node.js for API development.
Architect and develop scalable and performant mission critical web applications using Next.js for front-end and Node.js for API development.
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Experience of RESTful API design
Experience of RESTful API design
Understanding and/or experience in managing API-based software businesses
Understanding and/or experience in managing API-based software businesses
Design and manage secure networking and service meshes (TLS, Istio, Linkerd, API gateways) to ensure encrypted and reliable service-to-service communication. * Experience designing and managing secure networking and service mesh (TLS, Istio, Linkerd, API gateways).
Design and manage secure networking and service meshes (TLS, Istio, Linkerd, API gateways) to ensure encrypted and reliable service-to-service communication. * Experience designing and managing secure networking and service mesh (TLS, Istio, Linkerd, API gateways).
You possess a strong understanding of cloud computing, microservices, API design, and event-driven architectures.
You possess a strong understanding of cloud computing, microservices, API design, and event-driven architectures.
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Designed robust data architectures with a strong grasp of distributed systems, API development, and the patterns that make complex data processing reliable and maintainable.
Designed robust data architectures with a strong grasp of distributed systems, API development, and the patterns that make complex data processing reliable and maintainable.
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Test Automation: Build and maintain robust, scalable test automation frameworks for API, integration, and end-to-end tests within the MLOps pipeline. * Experience with automation tools (e.g., Selenium, Playwright, Cypress) and API testing tools (e.g., Postman, REST Assured).
Test Automation: Build and maintain robust, scalable test automation frameworks for API, integration, and end-to-end tests within the MLOps pipeline. * Experience with automation tools (e.g., Selenium, Playwright, Cypress) and API testing tools (e.g., Postman, REST Assured).
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Cybersecurity Incident Response Specialist - CONTRACT OPPORTUNITY * Remote with occasional trips to London (not expensed). * £750.00 per day. * 6 months. * ASAP start, ASAP interviews. * Right to work in the UK mandatory. The Cybersecurity Incident Response Specialist will be responsible for investigating, analysing and providing specialist expertise for the resolution of security incidents / attacks aimed at the client. Support the long-term strategic goals of Cyber Operations pillar support Senior Analysts and Analysts in managing incidents and liaise with SOC engineers to ensure appropriate security measures, technologies and processes are in place to avoid reoccurrence of incidents. * Demonstrate an ability to understand in detail how an incident has occurred without relying on alerts (e.g., reviewing logs and threat intelligence data).
Cybersecurity Incident Response Specialist - CONTRACT OPPORTUNITY * Remote with occasional trips to London (not expensed). * £750.00 per day. * 6 months. * ASAP start, ASAP interviews. * Right to work in the UK mandatory. The Cybersecurity Incident Response Specialist will be responsible for investigating, analysing and providing specialist expertise for the resolution of security incidents / attacks aimed at the client. Support the long-term strategic goals of Cyber Operations pillar support Senior Analysts and Analysts in managing incidents and liaise with SOC engineers to ensure appropriate security measures, technologies and processes are in place to avoid reoccurrence of incidents. * Demonstrate an ability to understand in detail how an incident has occurred without relying on alerts (e.g., reviewing logs and threat intelligence data).
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Experience with real-time model inference and API development (e.g., FastAPI, Flask).
Experience with real-time model inference and API development (e.g., FastAPI, Flask).
API Interaction: Familiarity with APIs, particularly in Python
API Interaction: Familiarity with APIs, particularly in Python
The platform supports everything from game deployment and integration to player session management, promotions, reporting, and third-party API connectivity.
The platform supports everything from game deployment and integration to player session management, promotions, reporting, and third-party API connectivity.
Experience with front-end JS frameworks (ideally Vue.js 3 + Composition API)
Experience with front-end JS frameworks (ideally Vue.js 3 + Composition API)
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Hands-on experience with AWS Bedrock or similar AI service platforms (OpenAI API, Azure AI, etc.) * AWS fundamentals - comfortable with Lambda, S3, API Gateway, and basic cloud architecture
Hands-on experience with AWS Bedrock or similar AI service platforms (OpenAI API, Azure AI, etc.) * AWS fundamentals - comfortable with Lambda, S3, API Gateway, and basic cloud architecture
Experience designing and managing API-based integrations and middleware tools (e.g., Zapier, Workato, Tray.io)
Experience designing and managing API-based integrations and middleware tools (e.g., Zapier, Workato, Tray.io)
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SharePoint CSOM API * SharePoint Rest API v1 & 2
SharePoint CSOM API * SharePoint Rest API v1 & 2
On a day to day basis, you'll be working closely with retail & manufacturing teams to discover, develop and support the systems they need, you will be building API first backend services to support frontend development and architect system integrations to allow for easy data flow across the business.
On a day to day basis, you'll be working closely with retail & manufacturing teams to discover, develop and support the systems they need, you will be building API first backend services to support frontend development and architect system integrations to allow for easy data flow across the business.
Crawley, United Kingdom - We dont just build technology. We build hope f or everyone dealing with cancer. Are you passionate about building software that makes a real difference? At Elekta, were looking for a Senior Software Development Engineer to help drive innovation in our Radiation Therapy Treatment systems. Youll be developing cutting-edge workflow, delivery, and imaging software for medical devicesworking within a safety-critical environment where software quality is paramount and embedded into our CI/CD pipelines. Guided by system architecture and technical leadership, youll collaborate in agile teams to deliver impactful solutions that improve patient outcomes worldwide. * Define, design, develop and maintain application components, services and APIs on the Elekta Domain-based service-oriented platform, hosted on containers.
Crawley, United Kingdom - We dont just build technology. We build hope f or everyone dealing with cancer. Are you passionate about building software that makes a real difference? At Elekta, were looking for a Senior Software Development Engineer to help drive innovation in our Radiation Therapy Treatment systems. Youll be developing cutting-edge workflow, delivery, and imaging software for medical devicesworking within a safety-critical environment where software quality is paramount and embedded into our CI/CD pipelines. Guided by system architecture and technical leadership, youll collaborate in agile teams to deliver impactful solutions that improve patient outcomes worldwide. * Define, design, develop and maintain application components, services and APIs on the Elekta Domain-based service-oriented platform, hosted on containers.
Day to day we build backend services, integrations with platforms like the Google Ads API, and features within Campaign Manager that give hoteliers both strategic control and tactical flexibility. * Integrations: Google Ads API, various metasearch and advertising platforms * Familiarity with the Google Ads API. * gRPC experience (we maintain a TypeScript Google Ads API library).
Day to day we build backend services, integrations with platforms like the Google Ads API, and features within Campaign Manager that give hoteliers both strategic control and tactical flexibility. * Integrations: Google Ads API, various metasearch and advertising platforms * Familiarity with the Google Ads API. * gRPC experience (we maintain a TypeScript Google Ads API library).
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Were Civica, and we create software that helps deliver critical services for citizens all around the world. From local government, to education, health, and care, over 5,000 public bodies across the globe use our software to provide essential services to over 100 million citizens. Our aspiration is to be a GovTech champion everywhere we work, supporting the needs of citizens and those who serve them every day. Building on 21 years of continuous growth and success, we're at a pivotal point in our journey to realise that aspiration. Why you will love this opportunity as Senior Data Analyst in our People Analytics Team at Civica - We are looking for a People Analytics Senior Data Analyst to join our global People Systems & Data team. This is a small but high-impact team with significant opportunity to shape how we use data across the business.
Were Civica, and we create software that helps deliver critical services for citizens all around the world. From local government, to education, health, and care, over 5,000 public bodies across the globe use our software to provide essential services to over 100 million citizens. Our aspiration is to be a GovTech champion everywhere we work, supporting the needs of citizens and those who serve them every day. Building on 21 years of continuous growth and success, we're at a pivotal point in our journey to realise that aspiration. Why you will love this opportunity as Senior Data Analyst in our People Analytics Team at Civica - We are looking for a People Analytics Senior Data Analyst to join our global People Systems & Data team. This is a small but high-impact team with significant opportunity to shape how we use data across the business.
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Gerrards Cross (Hybrid) FTC - Dec 25 - Jan 27 - Do you want to help shape software that affects thousands of lives? Who are we? We are ranked as the UKs #1 construction specific software player and our mission is simple; to provide market leading end-to-end software solutions to the construction and construction like industries across the entire build life cycle. If you are looking to build an exceptional career with an award-winning company youve come to the right place. Our teams are based in the UK, Europe, and India, working on products that are used on a global scale. We have a clear and defined road map to deliver over the next 3 years, which is centred around a large-scale digital transformation as well as continuing our growth and expansion. We embrace diversity and equality and want our employees to be comfortable bringing their whole selves to work.
Gerrards Cross (Hybrid) FTC - Dec 25 - Jan 27 - Do you want to help shape software that affects thousands of lives? Who are we? We are ranked as the UKs #1 construction specific software player and our mission is simple; to provide market leading end-to-end software solutions to the construction and construction like industries across the entire build life cycle. If you are looking to build an exceptional career with an award-winning company youve come to the right place. Our teams are based in the UK, Europe, and India, working on products that are used on a global scale. We have a clear and defined road map to deliver over the next 3 years, which is centred around a large-scale digital transformation as well as continuing our growth and expansion. We embrace diversity and equality and want our employees to be comfortable bringing their whole selves to work.
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XTM Group is dedicated to delivering cutting-edge solutions in the field of translation management. Our mission is to help enterprises reach global markets more efficiently by creating, delivering, and supporting an industry-leading platform to automate and manage all aspects of the localization process. Our culture emphasizes teamwork, collaboration, and a passion for language technology to better serve customers and employees. We are dedicated to creating a solution-oriented and inclusive environment where everyone feels valued and can contribute their best. Our core values guide their actions and are the foundation of our company culture, driving us to achieve the vision of being the leading Translation Management System for enterprises. We are seeking a highly technical Digital Growth Manager (SEO and AEO) to lead our digital marketing.
XTM Group is dedicated to delivering cutting-edge solutions in the field of translation management. Our mission is to help enterprises reach global markets more efficiently by creating, delivering, and supporting an industry-leading platform to automate and manage all aspects of the localization process. Our culture emphasizes teamwork, collaboration, and a passion for language technology to better serve customers and employees. We are dedicated to creating a solution-oriented and inclusive environment where everyone feels valued and can contribute their best. Our core values guide their actions and are the foundation of our company culture, driving us to achieve the vision of being the leading Translation Management System for enterprises. We are seeking a highly technical Digital Growth Manager (SEO and AEO) to lead our digital marketing.
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We are seeking an established Developer to become part of our Newcastle-based development team. This role will focus on upgrading and maintaining our core billing and quoting systems. Candidates that have experience with systems that handle high volumes of financial transactions and customer payments will be preferred. A little bit about us - We are a tech business that bundle household bills into one fixed monthly payment. Its a game changer. Its also a gorgeous place to work. Everybody gets stuck in to make things work, the team will make you feel welcome from day one, and the office is near some pretty great pubs. What youll be doing? Youll be part of a talented and diverse team that spans every aspect of the development process, including DevOps engineers, platform specialists, dedicated front-end developers, UI/UX designers, and versatile engineers skilled across
We are seeking an established Developer to become part of our Newcastle-based development team. This role will focus on upgrading and maintaining our core billing and quoting systems. Candidates that have experience with systems that handle high volumes of financial transactions and customer payments will be preferred. A little bit about us - We are a tech business that bundle household bills into one fixed monthly payment. Its a game changer. Its also a gorgeous place to work. Everybody gets stuck in to make things work, the team will make you feel welcome from day one, and the office is near some pretty great pubs. What youll be doing? Youll be part of a talented and diverse team that spans every aspect of the development process, including DevOps engineers, platform specialists, dedicated front-end developers, UI/UX designers, and versatile engineers skilled across
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Lead Frontend Developer - Remote with ad-hoc travel to Manchester || Experience within UK central government required - The Company - At Amber Labs, we are a cutting-edge UK and European technology consultancy that prioritises empowering autonomy, promoting experimentation, and facilitating rapid learning to provide exceptional value to our clients. Our company culture is centred around collaboration, where all colleagues, regardless of their role, work together to minimise risk and shorten delivery times. Our team consists of highly skilled cross-functional consultants, analysts, and support staff. About the Role - We're looking for a Lead Frontend Developer with deep expertise in modern web technologies and user interface development to join our growing team. * Be eligible for BPSS clearance . * Have proven experience delivering projects within UK central government
Lead Frontend Developer - Remote with ad-hoc travel to Manchester || Experience within UK central government required - The Company - At Amber Labs, we are a cutting-edge UK and European technology consultancy that prioritises empowering autonomy, promoting experimentation, and facilitating rapid learning to provide exceptional value to our clients. Our company culture is centred around collaboration, where all colleagues, regardless of their role, work together to minimise risk and shorten delivery times. Our team consists of highly skilled cross-functional consultants, analysts, and support staff. About the Role - We're looking for a Lead Frontend Developer with deep expertise in modern web technologies and user interface development to join our growing team. * Be eligible for BPSS clearance . * Have proven experience delivering projects within UK central government
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