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44 Permanent API jobs in Henley-On-Thames + 20 miles
744 exact matches jobs are outside your preferred location
The platform is a Rust based application and our API is mostly built on Workers or Golang.
The platform is a Rust based application and our API is mostly built on Workers or Golang.
Work on our cloud components which include our API backend services and Kubernetes controllers.
Work on our cloud components which include our API backend services and Kubernetes controllers.
Good understanding of API technologies and troubleshooting
Good understanding of API technologies and troubleshooting
Role Senior Consultant - Technology Inrule BRMS & .Net - Business Unit INS-ADM - Compensation Competitive (including bonus) We are seeking a highly skilled senior developer with expertise in InRule Business Rules Management System (BRMS) and .NET technologies . The ideal candidate will have 7+ years of overall IT experience, including 23 years of hands-on experience with InRule , and will be responsible for leading the design, development, and integration of rule-based solutions within enterprise applications. Your role * Lead the design and implementation of business rule solutions using InRule BRMS. * Collaborate with business analysts and stakeholders to gather rule requirements and translate them into technical specifications. * Integrate InRule with enterprise applications and APIs, including .NET, RESTful services, and cloud platforms.
Role Senior Consultant - Technology Inrule BRMS & .Net - Business Unit INS-ADM - Compensation Competitive (including bonus) We are seeking a highly skilled senior developer with expertise in InRule Business Rules Management System (BRMS) and .NET technologies . The ideal candidate will have 7+ years of overall IT experience, including 23 years of hands-on experience with InRule , and will be responsible for leading the design, development, and integration of rule-based solutions within enterprise applications. Your role * Lead the design and implementation of business rule solutions using InRule BRMS. * Collaborate with business analysts and stakeholders to gather rule requirements and translate them into technical specifications. * Integrate InRule with enterprise applications and APIs, including .NET, RESTful services, and cloud platforms.
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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.
Data & Analytics Product Manager (London, New York, or Singapore)
Data & Analytics Product Manager (London, New York, or Singapore)
Lloyds List Intelligence
London
Competitive
Strong technical understanding of data delivery and API technologies, protocols and best practises
Strong technical understanding of data delivery and API technologies, protocols and best practises
Provide guidance to customers who are implementing solutions using the Sprinklr API. * Analyze backend code and API requests/responses. * Create API Extensions using 3rd party API endpoints to be consumed within Sprinklr workflows. * Proven track record with API-based integrations (REST, JSON, authentication flows such as OAuth 2.0).
Provide guidance to customers who are implementing solutions using the Sprinklr API. * Analyze backend code and API requests/responses. * Create API Extensions using 3rd party API endpoints to be consumed within Sprinklr workflows. * Proven track record with API-based integrations (REST, JSON, authentication flows such as OAuth 2.0).
Distributed Systems Engineer - Data Platform (Delivery, Database, Retrieval)
Distributed Systems Engineer - Data Platform (Delivery, Database, Retrieval)
Cloudflare
London
Competitive
This includes developing our public GraphQL API, building robust log delivery solutions and integrations with customer destinations, and contributing to our alerting products, which empower users to configure and receive near real-time alerts based on the logs and metrics observed by our data platform.
This includes developing our public GraphQL API, building robust log delivery solutions and integrations with customer destinations, and contributing to our alerting products, which empower users to configure and receive near real-time alerts based on the logs and metrics observed by our data platform.
Are you an experienced Lead Java Developer with a proven track record of delivering high-quality, scalable solutions? Do you have expertise in working on large projects in financial markets and excellent communication and problem-solving skills? You then have a fantastic opportunity to join a multidisciplinary team and work on impactful projects within the financial markets, where cutting-edge technology meets complex business needs. In this hybrid role, youll lead the development of enterprise-grade solutions, collaborating with stakeholders to design, build and maintain microservices that power the future of financial systems. Youll also have the opportunity to address architectural decisions, optimize database performance and mentor junior team members, ensuring best practices and robust engineering standards across the board. Responsibilities
Are you an experienced Lead Java Developer with a proven track record of delivering high-quality, scalable solutions? Do you have expertise in working on large projects in financial markets and excellent communication and problem-solving skills? You then have a fantastic opportunity to join a multidisciplinary team and work on impactful projects within the financial markets, where cutting-edge technology meets complex business needs. In this hybrid role, youll lead the development of enterprise-grade solutions, collaborating with stakeholders to design, build and maintain microservices that power the future of financial systems. Youll also have the opportunity to address architectural decisions, optimize database performance and mentor junior team members, ensuring best practices and robust engineering standards across the board. Responsibilities
Contractual hours - 36.25 - Basis - Full time - Job category/type * Central Functions - Date posted - 10/09/2025 - REQ003131 - Location: London Grade: Consultant Employment Type: Permanent, Full Time Remote REQ003131 - XPS Pensions Group is no ordinary company. We've earned numerous awards and accolades, making us an industry leader in Pensions Consultancy. As the largest pure pensions consultancy in the UK, we are a team of approximately 2000 employees spread across 15 locations nationwide. Listed on the London Stock Exchange Main Market, we pride ourselves on our ability to think and act differently, offering expert advice to over 1600 pension schemes and administering pensions for over 1,000,000 members. We are currently seeking Power Platform Developer to join our IT team. XPS Group IT provides IT services to all 2000 employees in offices located across the UK and
Contractual hours - 36.25 - Basis - Full time - Job category/type * Central Functions - Date posted - 10/09/2025 - REQ003131 - Location: London Grade: Consultant Employment Type: Permanent, Full Time Remote REQ003131 - XPS Pensions Group is no ordinary company. We've earned numerous awards and accolades, making us an industry leader in Pensions Consultancy. As the largest pure pensions consultancy in the UK, we are a team of approximately 2000 employees spread across 15 locations nationwide. Listed on the London Stock Exchange Main Market, we pride ourselves on our ability to think and act differently, offering expert advice to over 1600 pension schemes and administering pensions for over 1,000,000 members. We are currently seeking Power Platform Developer to join our IT team. XPS Group IT provides IT services to all 2000 employees in offices located across the UK and
Crucially, the ability to understand how these tools integrate (data flow, API concepts) is essential, even if they're not building the integrations from scratch.
Crucially, the ability to understand how these tools integrate (data flow, API concepts) is essential, even if they're not building the integrations from scratch.
Enterprise Data Architect (Platform Documentation) - 3/6 month - Remote
Enterprise Data Architect (Platform Documentation) - 3/6 month - Remote
Fourth Limited
London
Competitive
Our Story - In July 2019, Fourth joined forces with HotSchedules to become the global leader in end-to-end restaurant and hospitality management technology solutions. Together, the merged company now represents the worlds largest and only provider of end-to-end restaurant and hospitality management solutions for customers across the globe and of all sizes, from a single location or franchisee restaurant to a global restaurant or hotel chain. The combined companys complete software-as-service (SaaS) solution suite including scheduling, time & attendance, applicant tracking, training, inventory management / procurement, HR / benefits and payroll services now serves customers in 120,000 locations worldwide and is supported by a dedicated, unified team across offices in the US, UK, Bulgaria, China, Australia, and UAE. Interested in joining our smart, fun, and talented tea
Our Story - In July 2019, Fourth joined forces with HotSchedules to become the global leader in end-to-end restaurant and hospitality management technology solutions. Together, the merged company now represents the worlds largest and only provider of end-to-end restaurant and hospitality management solutions for customers across the globe and of all sizes, from a single location or franchisee restaurant to a global restaurant or hotel chain. The combined companys complete software-as-service (SaaS) solution suite including scheduling, time & attendance, applicant tracking, training, inventory management / procurement, HR / benefits and payroll services now serves customers in 120,000 locations worldwide and is supported by a dedicated, unified team across offices in the US, UK, Bulgaria, China, Australia, and UAE. Interested in joining our smart, fun, and talented tea
About Us - Do you want to work on the most pressing problem of our generation? Do you have experience building great products and know what it's like to roll up your sleeves and execute well, while building a company around you for the long term? If you truly know what it feels like to fly the plane while trying to build it, we want to hear from you. We're looking for the best software engineers in the world to join a growing series A startup. At CarbonChain we see the climate crisis as a transformative opportunity for the global economy, and a rewarding career opportunity for those excited to take on the challenge in a rapidly growing market. Decarbonizing the economy requires a granular, real-time view of where emissions come from and how they might be reduced. We've built software to automate the carbon footprinting of supply chains so their emissions can be measur
About Us - Do you want to work on the most pressing problem of our generation? Do you have experience building great products and know what it's like to roll up your sleeves and execute well, while building a company around you for the long term? If you truly know what it feels like to fly the plane while trying to build it, we want to hear from you. We're looking for the best software engineers in the world to join a growing series A startup. At CarbonChain we see the climate crisis as a transformative opportunity for the global economy, and a rewarding career opportunity for those excited to take on the challenge in a rapidly growing market. Decarbonizing the economy requires a granular, real-time view of where emissions come from and how they might be reduced. We've built software to automate the carbon footprinting of supply chains so their emissions can be measur
At Medtronic you can begin a life-long career of exploration and innovation, while helping champion healthcare access and equity for all. Youll lead with purpose, breaking down barriers to innovation in a more connected, compassionate world. A Day in the Life - The Digital Technologies Business Unit (DTBU) at Medtronic is implementing cutting-edge AI technology, computer vision, and augmented reality in the operating room (OR) to augment surgical coaching, and eventually, performance. Our goal is to deliver safer surgery around the world. Our Touch SurgeryTM Video solution is an innovative video management and data analytics platform for hospitals that includes the DS1 Computer, our first OR device, allowing surgeons, OR team members, and trainees to securely access videos of their procedures shortly after surgery.
At Medtronic you can begin a life-long career of exploration and innovation, while helping champion healthcare access and equity for all. Youll lead with purpose, breaking down barriers to innovation in a more connected, compassionate world. A Day in the Life - The Digital Technologies Business Unit (DTBU) at Medtronic is implementing cutting-edge AI technology, computer vision, and augmented reality in the operating room (OR) to augment surgical coaching, and eventually, performance. Our goal is to deliver safer surgery around the world. Our Touch SurgeryTM Video solution is an innovative video management and data analytics platform for hospitals that includes the DS1 Computer, our first OR device, allowing surgeons, OR team members, and trainees to securely access videos of their procedures shortly after surgery.
Architecture and security-by-design, translating business needs into scalable, API-first solutions, applying OWASP principles, OAuth2/OIDC, and secure coding practices.
Architecture and security-by-design, translating business needs into scalable, API-first solutions, applying OWASP principles, OAuth2/OIDC, and secure coding practices.
We are a fast-growing, research-driven company building an artificial intelligence that helps online publishers overcome the challenges they face every day. Using novel AI, we are revolutionising the publishing industry and have a track record of building things that others have ruled out as impossible. Leading names from around the world rely on our product every day, including The Times, Le Monde, The Guardian, Vogue and many more. About the Role: You will work closely with our Product team and Data Scientists to define and execute on the future path for our products. * Work closely with senior engineers to design, build, and maintain back-end services and systems that support our AI-powered products, all whilst meeting launch deadlines. * Assist in the development and optimization of scalable, high-performance systems to support large volumes of data and machine ..
We are a fast-growing, research-driven company building an artificial intelligence that helps online publishers overcome the challenges they face every day. Using novel AI, we are revolutionising the publishing industry and have a track record of building things that others have ruled out as impossible. Leading names from around the world rely on our product every day, including The Times, Le Monde, The Guardian, Vogue and many more. About the Role: You will work closely with our Product team and Data Scientists to define and execute on the future path for our products. * Work closely with senior engineers to design, build, and maintain back-end services and systems that support our AI-powered products, all whilst meeting launch deadlines. * Assist in the development and optimization of scalable, high-performance systems to support large volumes of data and machine ..
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Were a specialist financial technology company transforming B2B credit (website) * Were backed by top European and American VCs including Dawn Capital, Octopus Ventures, Talis and Expa * Founded in 2020, we are licensed and operating across the UK, Europe, US and Canada with offices in London, New York and Dallas * Since our commercial launch in March 2022, we are already serving some of the worlds largest companies, providing them with superior credit protection and innovative risk management technology - Were looking for a Full Stack / Back End Engineer whos excited to build reliable systems and experiment with new technologies. Youll help design, build, and maintain the APIs and services behind our platform, working across the stack from infrastructure to UI. Youll be closely involved in technical decisions, architecture, and best practices, while contributing dire
Were a specialist financial technology company transforming B2B credit (website) * Were backed by top European and American VCs including Dawn Capital, Octopus Ventures, Talis and Expa * Founded in 2020, we are licensed and operating across the UK, Europe, US and Canada with offices in London, New York and Dallas * Since our commercial launch in March 2022, we are already serving some of the worlds largest companies, providing them with superior credit protection and innovative risk management technology - Were looking for a Full Stack / Back End Engineer whos excited to build reliable systems and experiment with new technologies. Youll help design, build, and maintain the APIs and services behind our platform, working across the stack from infrastructure to UI. Youll be closely involved in technical decisions, architecture, and best practices, while contributing dire
Senior Software 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 Senior Software Developer with strong expertise in Node.js (preferably), alongside Java or JavaScript, to join our growing team. * Be eligible for BPSS clearance . * Have proven experience delivering projects within UK central governm
Senior Software 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 Senior Software Developer with strong expertise in Node.js (preferably), alongside Java or JavaScript, to join our growing team. * Be eligible for BPSS clearance . * Have proven experience delivering projects within UK central governm
Location London Embassy Gardens - Type: Full-time - Department: Technology - Job Summary * To assist in the ongoing work relating to the integration and updates between Iterable (CRM) and WordPress (Headless and monolithic) * Work across the full stack, building highly scalable distributed solutions that enable positive user experiences and measurable business growth * Assist in formulating effective, responsive designs and turning them into working Gutenberg blocks and front-end components * Designing and implementing new features and functionality * Ensuring high-performance and availability, and managing all technical aspects of the CMS (WordPress) * Contributing to best practices relating to site builds, application security, regular patching and coding standards. Responsibilities * Assist with the implementation of new features and updates to the new email market
Location London Embassy Gardens - Type: Full-time - Department: Technology - Job Summary * To assist in the ongoing work relating to the integration and updates between Iterable (CRM) and WordPress (Headless and monolithic) * Work across the full stack, building highly scalable distributed solutions that enable positive user experiences and measurable business growth * Assist in formulating effective, responsive designs and turning them into working Gutenberg blocks and front-end components * Designing and implementing new features and functionality * Ensuring high-performance and availability, and managing all technical aspects of the CMS (WordPress) * Contributing to best practices relating to site builds, application security, regular patching and coding standards. Responsibilities * Assist with the implementation of new features and updates to the new email market
About Us - At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world's largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine's Top Company Cultures list and ranked among the World's Most Innovative Companies by Fast Company. We realize people do not fit into neat boxes.
About Us - At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world's largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine's Top Company Cultures list and ranked among the World's Most Innovative Companies by Fast Company. We realize people do not fit into neat boxes.
About Signal Ocean: Signal Ocean is the technology arm of the Signal Group. Our primary product, The Signal Ocean Platform, helps shipping and commodities professionals navigate their complex decision making. Driven by advanced machine learning and artificial intelligence, our technology suite provides tailored, exclusive insights that support our clients in achieving performance and efficiency. By securely handling and combining private and public shipping data flows, and applying advanced analytics, insights are delivered over web and mobile applications, as well as through a rich set of APIs and SDKs. Our backend architecture is abstracted to modularly offer deep analytics capabilities that are leveraged in the solutions that we offer or can be directly embedded in our clients system topologies.
About Signal Ocean: Signal Ocean is the technology arm of the Signal Group. Our primary product, The Signal Ocean Platform, helps shipping and commodities professionals navigate their complex decision making. Driven by advanced machine learning and artificial intelligence, our technology suite provides tailored, exclusive insights that support our clients in achieving performance and efficiency. By securely handling and combining private and public shipping data flows, and applying advanced analytics, insights are delivered over web and mobile applications, as well as through a rich set of APIs and SDKs. Our backend architecture is abstracted to modularly offer deep analytics capabilities that are leveraged in the solutions that we offer or can be directly embedded in our clients system topologies.
Location : London ? Office requirement : Hybrid, 1-2 days per week in office Employment type : Permanent - At GWI we're always looking for extraordinary people who thrive on making an extraordinary impact. Right now we're looking for a Technical Product Manager to play a key role in our calculations squad of the Platform Product team in London. If that's you, and making a difference gets you out of bed in the morning, keep reading. It could be the start of something, well, extraordinary. Sounds great, what will I be doing? As our Technical Product Manager you'll sit within the Calculations squad of the Platform Product team, who are responsible for GWI's high-performance computation engine that processes billions of data points to deliver fast, accurate, and scalable insights. This system sits at the core of our platform, powering in-memory data processing across all
Location : London ? Office requirement : Hybrid, 1-2 days per week in office Employment type : Permanent - At GWI we're always looking for extraordinary people who thrive on making an extraordinary impact. Right now we're looking for a Technical Product Manager to play a key role in our calculations squad of the Platform Product team in London. If that's you, and making a difference gets you out of bed in the morning, keep reading. It could be the start of something, well, extraordinary. Sounds great, what will I be doing? As our Technical Product Manager you'll sit within the Calculations squad of the Platform Product team, who are responsible for GWI's high-performance computation engine that processes billions of data points to deliver fast, accurate, and scalable insights. This system sits at the core of our platform, powering in-memory data processing across all
The Firm - XTX Markets is a leading algorithmic trading firm which uses state-of-the-art machine learning technology to produce price forecasts for over 50,000 financial instruments across equities, fixed income, currencies, commodities and crypto. It uses those forecasts to trade on exchanges and alternative trading venues, and to offer differentiated liquidity directly to clients worldwide. The firm trades over $250bn a day across 35 countries and has over 250 employees based in London, Singapore, New York, Paris, Bristol, Mumbai, Yerevan and Kajaani. We leverage the talent of the people who work here, modern computational techniques and state-of-the-art research infrastructure to analyse large data sets across markets quickly and efficiently, to maximize the effectiveness of our proprietary trading algorithms. We are actively seeking new methods and ideas.
The Firm - XTX Markets is a leading algorithmic trading firm which uses state-of-the-art machine learning technology to produce price forecasts for over 50,000 financial instruments across equities, fixed income, currencies, commodities and crypto. It uses those forecasts to trade on exchanges and alternative trading venues, and to offer differentiated liquidity directly to clients worldwide. The firm trades over $250bn a day across 35 countries and has over 250 employees based in London, Singapore, New York, Paris, Bristol, Mumbai, Yerevan and Kajaani. We leverage the talent of the people who work here, modern computational techniques and state-of-the-art research infrastructure to analyse large data sets across markets quickly and efficiently, to maximize the effectiveness of our proprietary trading algorithms. We are actively seeking new methods and ideas.
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Who we are Nothing exists to make tech feel exciting again. Were building a different kind of company, one that puts design, emotion, and human creativity at the heart of everything we do. From the way our products look to how they sound, feel, and function, we care about the details that make technology not just useful, but inspiring. This is a place for the curious. The creators. The ones who ask why not and mean it. If you're drawn to bold ideas, fast moves, and work that actually makes you feel something, youll fit right in. We're not here to follow the rules. We're here to make better ones. About Nothing Founded in London in 2020, Nothing is a design-led tech company building an alternative to the industry giants. Our products from award-winning smartphones to expressive audio and wearables blend iconic design with intuitive engineering to put people and creativi
Who we are Nothing exists to make tech feel exciting again. Were building a different kind of company, one that puts design, emotion, and human creativity at the heart of everything we do. From the way our products look to how they sound, feel, and function, we care about the details that make technology not just useful, but inspiring. This is a place for the curious. The creators. The ones who ask why not and mean it. If you're drawn to bold ideas, fast moves, and work that actually makes you feel something, youll fit right in. We're not here to follow the rules. We're here to make better ones. About Nothing Founded in London in 2020, Nothing is a design-led tech company building an alternative to the industry giants. Our products from award-winning smartphones to expressive audio and wearables blend iconic design with intuitive engineering to put people and creativi
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Please note visa sponsorship is not available for this position. DriveScore is on a mission to make car insurance fairer, smarter, and more user-friendly and were looking for a talented Android Engineer to help us get there. Were a fast-growing scale-up within the ClearScore Group, using telematics and data analytics to reward good driving with better insurance deals. Backed by ClearScores 25M users and resources, we combine the energy of a startup with the stability and reach of a major tech company. This role is ideal for an Android engineer whos shipped commercial apps and is ready to take ownership of product features within a collaborative, cross-functional squad. * Build and maintain features in the DriveScore app, using Jetpack Compose, Kotlin, and Kotlin Multiplatform * Collaborate closely with product, design, and other engineers to deliver high-quality exper
Please note visa sponsorship is not available for this position. DriveScore is on a mission to make car insurance fairer, smarter, and more user-friendly and were looking for a talented Android Engineer to help us get there. Were a fast-growing scale-up within the ClearScore Group, using telematics and data analytics to reward good driving with better insurance deals. Backed by ClearScores 25M users and resources, we combine the energy of a startup with the stability and reach of a major tech company. This role is ideal for an Android engineer whos shipped commercial apps and is ready to take ownership of product features within a collaborative, cross-functional squad. * Build and maintain features in the DriveScore app, using Jetpack Compose, Kotlin, and Kotlin Multiplatform * Collaborate closely with product, design, and other engineers to deliver high-quality exper
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Locations
- Southwark
- The City, City (EC3)
- The City, City (EC4)
- Felbridge
- Holborn
- Canary Wharf
- Chiswick
- Datchet Common
- Euston
- Frimley
- City of London
- Reading
- South East London
- South West London
- Central London
- West End
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- London
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