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4 Permanent API jobs in East Sussex + 20 miles
313 exact matches jobs are outside your preferred location
Creating and Maintaining Documentation: Develop high-quality product documentation, including user guides, API references, release notes, FAQs, and onboarding materials using both traditional methods as well as utilising modern AI tooling.
Creating and Maintaining Documentation: Develop high-quality product documentation, including user guides, API references, release notes, FAQs, and onboarding materials using both traditional methods as well as utilising modern AI tooling.
Full-Stack Feature Delivery: Design and build high-quality features covering both Front-end and Back-end, including robust API integration and effective data management (database interactions).
Full-Stack Feature Delivery: Design and build high-quality features covering both Front-end and Back-end, including robust API integration and effective data management (database interactions).
Must have experience with .NET and C#, SDLC (Software Development Life Cycle), Database (SQL, Azure Data Store) and API/REST
Must have experience with .NET and C#, SDLC (Software Development Life Cycle), Database (SQL, Azure Data Store) and API/REST
You understand the patterns (e.g., webhooks, polling, message queues, event-driven architectures), the challenges of API versioning, and the principles of building a scalable, multi-tenant integrations platform. * Systems Thinking: Strong understanding of modern backend building blocks: API best practices; message queues (RabbitMQ, SNS/SQS or similar); relational data stores (PostgreSQL or similar); and cloud services (AWS or similar).
You understand the patterns (e.g., webhooks, polling, message queues, event-driven architectures), the challenges of API versioning, and the principles of building a scalable, multi-tenant integrations platform. * Systems Thinking: Strong understanding of modern backend building blocks: API best practices; message queues (RabbitMQ, SNS/SQS or similar); relational data stores (PostgreSQL or similar); and cloud services (AWS or similar).
Reporting to our CPO, you will lead the strategy and roadmap across mobile ticketing and payments, Account-Based Ticketing, EMV, our API and integration layer, and the requirements that underpin reliability, performance and service tiers. * Define and own the strategy for Masabis core platform domains, including ABT, EMV, mobile ticketing, the fare engine and our API and integration layer. * Treat our API platform and integration layer as first-class products. * Strengthen the developer and partner experience through improved API coverage, documentation and tooling.
Reporting to our CPO, you will lead the strategy and roadmap across mobile ticketing and payments, Account-Based Ticketing, EMV, our API and integration layer, and the requirements that underpin reliability, performance and service tiers. * Define and own the strategy for Masabis core platform domains, including ABT, EMV, mobile ticketing, the fare engine and our API and integration layer. * Treat our API platform and integration layer as first-class products. * Strengthen the developer and partner experience through improved API coverage, documentation and tooling.
This role is part of our Digital Platform Services team, who are responsible for delivering central services to the divisions in an API first way by utilising AI to pioneer of AI-first development practices. * Design and implement scalable microservices with API-first mindset API-First & Microservices Excellence * Create comprehensive API documentation and developer guides API-First & Microservices Architecture * Deep knowledge of API design principles and RESTful/GraphQL patterns * Understanding of service mesh, API gateways, and inter-service communication * API design and documentation tools (Swagger/OpenAPI, Postman)
This role is part of our Digital Platform Services team, who are responsible for delivering central services to the divisions in an API first way by utilising AI to pioneer of AI-first development practices. * Design and implement scalable microservices with API-first mindset API-First & Microservices Excellence * Create comprehensive API documentation and developer guides API-First & Microservices Architecture * Deep knowledge of API design principles and RESTful/GraphQL patterns * Understanding of service mesh, API gateways, and inter-service communication * API design and documentation tools (Swagger/OpenAPI, Postman)
The Developer Platform team supports 75B+ API calls and a growing marketplace with 300+ partner applications.
The Developer Platform team supports 75B+ API calls and a growing marketplace with 300+ partner applications.
Work closely with IT teams to support data integration initiatives, with our customers & brokers to leverage our API capabilities to streamline processes and enable seamless data exchange across platforms.
Work closely with IT teams to support data integration initiatives, with our customers & brokers to leverage our API capabilities to streamline processes and enable seamless data exchange across platforms.
Lead Transformation: Transition from monolithic applications to an API-first, modular platform strategy.
Lead Transformation: Transition from monolithic applications to an API-first, modular platform strategy.
Apply a core understanding of API and Webhook functionality to help customers achieve key customer use cases utilizing the Klaviyo platform.
Apply a core understanding of API and Webhook functionality to help customers achieve key customer use cases utilizing the Klaviyo platform.
Our API service layer is written in Go, following a documentation-first mindset. * Experience delivering cloud-based REST API solutions
Our API service layer is written in Go, following a documentation-first mindset. * Experience delivering cloud-based REST API solutions
May participate in standards development committees or task groups such as API
May participate in standards development committees or task groups such as API
Post-training techniques for planning, reasoning & complex workflows (e.g., reasoning models, LLMs + knowledge graphs, test time compute, CoT pipelines, tool use & API calling, etc.)
Post-training techniques for planning, reasoning & complex workflows (e.g., reasoning models, LLMs + knowledge graphs, test time compute, CoT pipelines, tool use & API calling, etc.)
Who are we? Look at the latest headlines and you will see something Ki insures. Think space shuttles, world tours, wind farms, and even footballers legs. Kis mission is simple. Digitally disrupt and revolutionise a 335-year-old market. Working with Google and UCL, Ki has created a platform that uses algorithms, machine learning and large language models to give insurance brokers quotes in seconds, rather than days. Ki is proudly the biggest global algorithmic insurance carrier. It is the fastest growing syndicate in the Lloyd's of London market, and the first ever to make $100m in profit in 3 years. Kis teams have varied backgrounds and work together in an agile, cross-functional way to build the very best experience for its customers. Ki has big ambitions but needs more excellent minds to challenge the status-quo and help it reach new horizons. Where you come in?
Who are we? Look at the latest headlines and you will see something Ki insures. Think space shuttles, world tours, wind farms, and even footballers legs. Kis mission is simple. Digitally disrupt and revolutionise a 335-year-old market. Working with Google and UCL, Ki has created a platform that uses algorithms, machine learning and large language models to give insurance brokers quotes in seconds, rather than days. Ki is proudly the biggest global algorithmic insurance carrier. It is the fastest growing syndicate in the Lloyd's of London market, and the first ever to make $100m in profit in 3 years. Kis teams have varied backgrounds and work together in an agile, cross-functional way to build the very best experience for its customers. Ki has big ambitions but needs more excellent minds to challenge the status-quo and help it reach new horizons. Where you come in?
Role - About FX Digital - FX Digital is a specialist Connected TV agency, providing a wide range of services, including Product Strategy, Design, Engineering, and Test Automation. We partner with global streaming brands such as Discovery+, BritBox, ATP Media, ITV, and Dyn. As a Senior Software Engineer at FX Digital, you take a leading role in shaping the technical direction of our Connected TV and living room experiences. With your extensive experience in application development and web technologies, you will lead technical solutions, mentor team members, and deliver engaging user experiences for large screen devices. Key Responsibilities * Engineer and develop responsive, fluid, and data driven user experiences for mobile and large screen devices * Lead technical solutions for Connected TV, mobile and interactivity across smart devices
Role - About FX Digital - FX Digital is a specialist Connected TV agency, providing a wide range of services, including Product Strategy, Design, Engineering, and Test Automation. We partner with global streaming brands such as Discovery+, BritBox, ATP Media, ITV, and Dyn. As a Senior Software Engineer at FX Digital, you take a leading role in shaping the technical direction of our Connected TV and living room experiences. With your extensive experience in application development and web technologies, you will lead technical solutions, mentor team members, and deliver engaging user experiences for large screen devices. Key Responsibilities * Engineer and develop responsive, fluid, and data driven user experiences for mobile and large screen devices * Lead technical solutions for Connected TV, mobile and interactivity across smart devices
Easyship is revolutionizing logistics for eCommerce. With our all-in-one cloud based shipping software, businesses of all shapes and sizes have the tools needed to scale globally. At Easyship we believe in accelerating borderless commerce. We're proud that a diversity of small business owners, crowdfunding campaigns, and global brands trust Easyship as their gateway to the world. To learn more about us click here. Job Title: Head of Product - Level: Head of Department - Location: London - Reports to: Co-Founder - Key Relationships: Product and Engineering teams - We're Easyship, a fast-growing SaaS powerhouse revolutionizing logistics. We operate globally with offices in North America, Europe and Asia. We're on the hunt for a Head of Product who's ready to dominate, hustle hard, and shape the future of global shipping. This isn't a gig for the faint-hearted. Mediocrit
Easyship is revolutionizing logistics for eCommerce. With our all-in-one cloud based shipping software, businesses of all shapes and sizes have the tools needed to scale globally. At Easyship we believe in accelerating borderless commerce. We're proud that a diversity of small business owners, crowdfunding campaigns, and global brands trust Easyship as their gateway to the world. To learn more about us click here. Job Title: Head of Product - Level: Head of Department - Location: London - Reports to: Co-Founder - Key Relationships: Product and Engineering teams - We're Easyship, a fast-growing SaaS powerhouse revolutionizing logistics. We operate globally with offices in North America, Europe and Asia. We're on the hunt for a Head of Product who's ready to dominate, hustle hard, and shape the future of global shipping. This isn't a gig for the faint-hearted. Mediocrit
Join Proton and build a better internet where privacy is the default - At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online. Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech's invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive infor
Join Proton and build a better internet where privacy is the default - At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online. Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech's invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive infor
Since being founded in 2018, Copper has been building the standard for institutional digital asset infrastructure with a focus on custody, collateral management, and prime services. Led by Amar Kuchinad, Copper's Global CEO, the firm provides a comprehensive suite of custody, trading and settlement solutions that reduce counterparty risk and bring greater capital and operational efficiency to digital asset markets. At the heart of Copper's offering is Multi-Party Computation (MPC) technology the gold standard in secure custody. Coppers multi-award winning custody system is unique in that it can be connected to centralised exchanges, DeFi applications and even staking pools without the assets leaving the custody. Built on top of this state-of-the-art custody, ClearLoop is the first solution in the market that overcomes a growing industry challenge; counterparty risk wi
Since being founded in 2018, Copper has been building the standard for institutional digital asset infrastructure with a focus on custody, collateral management, and prime services. Led by Amar Kuchinad, Copper's Global CEO, the firm provides a comprehensive suite of custody, trading and settlement solutions that reduce counterparty risk and bring greater capital and operational efficiency to digital asset markets. At the heart of Copper's offering is Multi-Party Computation (MPC) technology the gold standard in secure custody. Coppers multi-award winning custody system is unique in that it can be connected to centralised exchanges, DeFi applications and even staking pools without the assets leaving the custody. Built on top of this state-of-the-art custody, ClearLoop is the first solution in the market that overcomes a growing industry challenge; counterparty risk wi
Are you searching for an opportunity to play a key role in driving the dramatic growth of a highly successful software company? At Poppulo, we're working on what's next in communications and workplace technology. As a pioneer in this industry, we understand that meaningfully reaching every employee is hard. And so is managing office space in a hybrid world. And so is improving the customer and guest experience. We exist to make each of these things easier. We exist to bring harmony to our customers. And we do that at enterprise scale. Our omnichannel employee communications, customer communications, and workplace experience platform is trusted by over 6,000 organizations today, reaching more than 35M employees and delivering content to 500,000+ digital signs. We know there's no such thing as a "perfect" candidate - we're all a work in progress and are growing new skil
Are you searching for an opportunity to play a key role in driving the dramatic growth of a highly successful software company? At Poppulo, we're working on what's next in communications and workplace technology. As a pioneer in this industry, we understand that meaningfully reaching every employee is hard. And so is managing office space in a hybrid world. And so is improving the customer and guest experience. We exist to make each of these things easier. We exist to bring harmony to our customers. And we do that at enterprise scale. Our omnichannel employee communications, customer communications, and workplace experience platform is trusted by over 6,000 organizations today, reaching more than 35M employees and delivering content to 500,000+ digital signs. We know there's no such thing as a "perfect" candidate - we're all a work in progress and are growing new skil
Castleton Commodities International ( is a global leader in energy commodity trading and asset investment. Our Data Science & Technology team is central to our success, engineering the high-performance data, systems and innovative tools that power our commercial decision-making. We build platforms and forecasts that help our front-office teams understand market behavior, forecast price movements, and manage risk. Our team solves complex, high-impact challenges using a modern technology stack, including the latest in GenAI and the latest technologies. We develop everything in cloud-native infrastructure from structured data and real-time analytics to back testing engines, third party integrations, and internal libraries, all designed to give CCI a competitive edge in global commodities markets.
Castleton Commodities International ( is a global leader in energy commodity trading and asset investment. Our Data Science & Technology team is central to our success, engineering the high-performance data, systems and innovative tools that power our commercial decision-making. We build platforms and forecasts that help our front-office teams understand market behavior, forecast price movements, and manage risk. Our team solves complex, high-impact challenges using a modern technology stack, including the latest in GenAI and the latest technologies. We develop everything in cloud-native infrastructure from structured data and real-time analytics to back testing engines, third party integrations, and internal libraries, all designed to give CCI a competitive edge in global commodities markets.
Role - About FX Digital - FX Digital is a specialist Connected TV agency, providing a wide range of services, including Product Strategy, Design, Engineering, and Test Automation. We partner with global streaming brands such as Discovery+, BritBox, ATP Media, ITV, and Dyn. As a Software Engineer at FX Digital, you play a pivotal role in delivering Connected TV and living room experiences that reach hundreds of thousands of users. With your experience in application development and web technologies, you will deliver engaging user experiences for large screen devices. You are passionate about quality, continuously learning new technologies, and improving team processes. Collaborating effectively with the team, you contribute to both the technical and creative aspects of projects. Key Responsibilities * Engineer and develop responsive, fluid, and data driven user experie
Role - About FX Digital - FX Digital is a specialist Connected TV agency, providing a wide range of services, including Product Strategy, Design, Engineering, and Test Automation. We partner with global streaming brands such as Discovery+, BritBox, ATP Media, ITV, and Dyn. As a Software Engineer at FX Digital, you play a pivotal role in delivering Connected TV and living room experiences that reach hundreds of thousands of users. With your experience in application development and web technologies, you will deliver engaging user experiences for large screen devices. You are passionate about quality, continuously learning new technologies, and improving team processes. Collaborating effectively with the team, you contribute to both the technical and creative aspects of projects. Key Responsibilities * Engineer and develop responsive, fluid, and data driven user experie
About us - Were an early-stage company operating in stealth, and while were not publicly sharing full details just yet, we can assure you the work ahead is ambitious, meaningful and exciting. As you progress through the hiring process, well share more about our mission, our technology and the team youll be joining. For now, what matters most is finding people who are energised by the pace and possibility of an emerging company and who want to help shape something from the ground up. What We Offer * High-impact environment: Join a company shaping the future of software, working with a team thats redefining how AI meets real-world business needs * Ownership and visibility: In a small, high-performing team, the impact of your work isnt theoretical, it actively shapes the companys direction * Empowerment through innovation: Use cutting-edge AI tools internally.
About us - Were an early-stage company operating in stealth, and while were not publicly sharing full details just yet, we can assure you the work ahead is ambitious, meaningful and exciting. As you progress through the hiring process, well share more about our mission, our technology and the team youll be joining. For now, what matters most is finding people who are energised by the pace and possibility of an emerging company and who want to help shape something from the ground up. What We Offer * High-impact environment: Join a company shaping the future of software, working with a team thats redefining how AI meets real-world business needs * Ownership and visibility: In a small, high-performing team, the impact of your work isnt theoretical, it actively shapes the companys direction * Empowerment through innovation: Use cutting-edge AI tools internally.
Senior Data Scientist II
Senior Data Scientist II
LEXISNEXIS RISK SOLUTIONS UK LIMITED T/a LexisNexis Risk Solutions Group
London
Competitive
Are you ready to take your data science expertise to the next level and lead impactful projects? Would you enjoy working on advanced machine learning models and cutting-edge analytics solutions? We are a fast-moving, high-impact Data Science & AI team building real-world GenAI and ML solutions across the entire LexisNexis business. Our work powers smarter decisions for Product, Sales, Finance, Marketing, Customer Success, and Engineeringeverything from predictive models to enterprise GenAI apps to automation that transforms how teams operate. We are data science generalists who love variety. One day, it is designing a new GenAI workflow, the next it is deploying a model into Salesforce or engineering a pipeline in Databricks. We own our projects end-to-end and partner directly with stakeholders to deliver solutions that get used and make a measurable difference.
Are you ready to take your data science expertise to the next level and lead impactful projects? Would you enjoy working on advanced machine learning models and cutting-edge analytics solutions? We are a fast-moving, high-impact Data Science & AI team building real-world GenAI and ML solutions across the entire LexisNexis business. Our work powers smarter decisions for Product, Sales, Finance, Marketing, Customer Success, and Engineeringeverything from predictive models to enterprise GenAI apps to automation that transforms how teams operate. We are data science generalists who love variety. One day, it is designing a new GenAI workflow, the next it is deploying a model into Salesforce or engineering a pipeline in Databricks. We own our projects end-to-end and partner directly with stakeholders to deliver solutions that get used and make a measurable difference.
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Join some of the most innovative thinkers in FinTech as we lead the evolution of financial technology. If you are an innovative, curious, collaborative person who embraces challenges and wants to grow, learn, and pursue outcomes with our prestigious financial clients, say Hello to SimCorp! At its foundation, SimCorp is guided by our values caring, customer success-driven, collaborative, curious, and courageous. Our people-centered organization focuses on skills development, relationship building, and client success. We take pride in cultivating an environment where all team members can grow, feel heard, valued, and empowered. If you like what were saying, keep reading! Are you interested in joining a collaborative team in a great office environment in an award-winning organization? At Axioma By SimCorp, we bring together highly skilled minds from across the world to r
Join some of the most innovative thinkers in FinTech as we lead the evolution of financial technology. If you are an innovative, curious, collaborative person who embraces challenges and wants to grow, learn, and pursue outcomes with our prestigious financial clients, say Hello to SimCorp! At its foundation, SimCorp is guided by our values caring, customer success-driven, collaborative, curious, and courageous. Our people-centered organization focuses on skills development, relationship building, and client success. We take pride in cultivating an environment where all team members can grow, feel heard, valued, and empowered. If you like what were saying, keep reading! Are you interested in joining a collaborative team in a great office environment in an award-winning organization? At Axioma By SimCorp, we bring together highly skilled minds from across the world to r
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Who are we? Howden is a global insurance group with employee ownership at its heart. Together, we have pushed the boundaries of insurance. We are united by a shared passion and no-limits mindset, and our strength lies in our ability to collaborate as a powerful international team comprised of 23,000 employees spanning over 56 countries. People join Howden for many different reasons, but they stay for the same one: our culture. Its what sets us apart, and the reason our employees have been turning down headhunters for years. Whatever your priorities work / life balance, career progression, sustainability, volunteering youll find like-minded people driving change at Howden. What is the role? We are looking for a Treasury Systems Analyst to join our Group Treasury team. The Treasury Systems Analyst is responsible for the Group Treasury Management system, Online Banking S
Who are we? Howden is a global insurance group with employee ownership at its heart. Together, we have pushed the boundaries of insurance. We are united by a shared passion and no-limits mindset, and our strength lies in our ability to collaborate as a powerful international team comprised of 23,000 employees spanning over 56 countries. People join Howden for many different reasons, but they stay for the same one: our culture. Its what sets us apart, and the reason our employees have been turning down headhunters for years. Whatever your priorities work / life balance, career progression, sustainability, volunteering youll find like-minded people driving change at Howden. What is the role? We are looking for a Treasury Systems Analyst to join our Group Treasury team. The Treasury Systems Analyst is responsible for the Group Treasury Management system, Online Banking S