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        95 Permanent API jobs in Hatfield + 20 miles

        298 exact matches jobs are outside your preferred location

        Senior Cloud Security Engineer

        Holland & Barrett
        South East
        Competitive
        Experience with AWS, Kubernetes, Service Mesh, API gateways, and API Security (authentication and authorization).
        Experience with AWS, Kubernetes, Service Mesh, API gateways, and API Security (authentication and authorization).
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        NEW
        Security Architecture Secure Design Team - Role: Manager Principal Security Architect: Secure Design (Individual Contributor) Grade: GG14 - The Security Architecture Design team is responsible for developing Security Architecture patterns, developing security controls needed for new technology, promoting the use of the architectural patterns into development projects, leading the Security Architecture Design Forum, Evaluating architectural security risks in existing systems, consulting with system development teams and architects on building security into their design. This key task of this role is accelerating the delivery of secure design artefacts and leading secure design interventions - by adding capacity and capability to the team. Reports to: Senior Manager Secure Design - Key Relationships * Business Aligned Principal Security Architects * CyberSecurity Engine
        Security Architecture Secure Design Team - Role: Manager Principal Security Architect: Secure Design (Individual Contributor) Grade: GG14 - The Security Architecture Design team is responsible for developing Security Architecture patterns, developing security controls needed for new technology, promoting the use of the architectural patterns into development projects, leading the Security Architecture Design Forum, Evaluating architectural security risks in existing systems, consulting with system development teams and architects on building security into their design. This key task of this role is accelerating the delivery of secure design artefacts and leading secure design interventions - by adding capacity and capability to the team. Reports to: Senior Manager Secure Design - Key Relationships * Business Aligned Principal Security Architects * CyberSecurity Engine
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        LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. Its how weve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services and our open-access model we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.LSEG is headquartered in the United Kingdom, with significant ...
        LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. Its how weve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services and our open-access model we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.LSEG is headquartered in the United Kingdom, with significant ...
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        Extensive Salesforce development experience (including Apex triggers, classes, asynchronous Apex, API Integrations, Platform Events, LWCs and Sites)
        Extensive Salesforce development experience (including Apex triggers, classes, asynchronous Apex, API Integrations, Platform Events, LWCs and Sites)
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        NEW
        Investigate and resolve production issues promptly from user interface (UI) through to application logic (API & database) and infrastructure
        Investigate and resolve production issues promptly from user interface (UI) through to application logic (API & database) and infrastructure
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        Senior C# Software Engineer

        Spectrum It Recruitment Limited
        UK
        £60000 - £65000 per annum
        Due to continued success, they are looking to grow one of their key software engineering teams working on some of their most successful SaaS products. The Senior C# Software Engineer will join an established team developing business logic for Windows based products. Key experience * Extensive commercial experience in C# Windows programming * Multithreading / TPL * XML * SQL * Version control * Unit testing Experience in any of the following areas would be advantageous but is not a prerequisite * WIX installers * Windows services eg Active Directory, Exchange etc * Client-server architecture development * M365 APIs If you are seeking a role of this nature please get in touch for more information. Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.
        Due to continued success, they are looking to grow one of their key software engineering teams working on some of their most successful SaaS products. The Senior C# Software Engineer will join an established team developing business logic for Windows based products. Key experience * Extensive commercial experience in C# Windows programming * Multithreading / TPL * XML * SQL * Version control * Unit testing Experience in any of the following areas would be advantageous but is not a prerequisite * WIX installers * Windows services eg Active Directory, Exchange etc * Client-server architecture development * M365 APIs If you are seeking a role of this nature please get in touch for more information. Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy.
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        Code quality and API-First principles are at the heart of all our development. * Deliver high efficiency, high availability, concurrent and fault tolerant software systems using API-First principles. * An interest in setting strategy and direction, backed by real-work experience, ideally in an API-First setting. * Experience designing, building, and deploying scalable micro-services using API-First principles using at least one of REST/gRPC. * Strong understanding of RESTful API design principles and best practices. * Experience with API authentication and authorization mechanisms (e.g., OAuth, JWT). * Experience with API gateway technologies (e.g., Apigee, Kong) is beneficial.
        Code quality and API-First principles are at the heart of all our development. * Deliver high efficiency, high availability, concurrent and fault tolerant software systems using API-First principles. * An interest in setting strategy and direction, backed by real-work experience, ideally in an API-First setting. * Experience designing, building, and deploying scalable micro-services using API-First principles using at least one of REST/gRPC. * Strong understanding of RESTful API design principles and best practices. * Experience with API authentication and authorization mechanisms (e.g., OAuth, JWT). * Experience with API gateway technologies (e.g., Apigee, Kong) is beneficial.
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        In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
        In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
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        This includes proficiency with Anypoint Studio, DataWeave for data transformation, and API-led connectivity design principles (RAML or OAS for defining APIs). Strong grasp of RESTful API design, SOAP services, and integration patterns. Familiar with data formats like JSON and XML for API communication. Experience implementing secure APIs (OAuth2.0, JWT) and managing APIs through MuleSofts API manager or similar.
        This includes proficiency with Anypoint Studio, DataWeave for data transformation, and API-led connectivity design principles (RAML or OAS for defining APIs). Strong grasp of RESTful API design, SOAP services, and integration patterns. Familiar with data formats like JSON and XML for API communication. Experience implementing secure APIs (OAuth2.0, JWT) and managing APIs through MuleSofts API manager or similar.
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        Support an API-FIRST Analytics business strategy to design and build SaaS and PaaS solutions, including analytics data solutions, quantitative models, risk analytics and customized reporting tools, and other sophisticated analytical tools. * Experience leading/designing/delivering API service-based product solutions
        Support an API-FIRST Analytics business strategy to design and build SaaS and PaaS solutions, including analytics data solutions, quantitative models, risk analytics and customized reporting tools, and other sophisticated analytical tools. * Experience leading/designing/delivering API service-based product solutions
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        Company Description - Why does this matter? Because our platform makes trading fixed-income more accessible, ultimately improving transparency, efficiency, and competition in the marketplace. Changing the way an established industry transacts is no easy feat. There will be twists and turns, because no ones ever done this before. But now, more than 2,000 clients around the world rely on our solutions, and that number is only expected to grow in the years ahead. We know where were going. How we get there is up to us. Join us and help Take Us There. The Role - We are looking for a Senior Technical Product Manager (TPM) to join our software engineering team who will play a key role in the successful delivery of software across our next generation trading platform. This role differs from traditional Product roles in that it reports into the Technology organization rather t
        Company Description - Why does this matter? Because our platform makes trading fixed-income more accessible, ultimately improving transparency, efficiency, and competition in the marketplace. Changing the way an established industry transacts is no easy feat. There will be twists and turns, because no ones ever done this before. But now, more than 2,000 clients around the world rely on our solutions, and that number is only expected to grow in the years ahead. We know where were going. How we get there is up to us. Join us and help Take Us There. The Role - We are looking for a Senior Technical Product Manager (TPM) to join our software engineering team who will play a key role in the successful delivery of software across our next generation trading platform. This role differs from traditional Product roles in that it reports into the Technology organization rather t
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        NEW
        Join Us as a Software Development Engineer in Test (SDET)! Overview - We are looking for a Software Development Engineer in Test (SDET) or automation tester who comes from a Java Software Development background. The role is to assist in the development of the new Index platform for the FTSE-Russell Index business of the London Stock Exchange Group (LSEG). The Index Platform team performs the calculation, maintenance and distribution of Index products. You will be working on innovative technologies with a team of engineers to implement solutions which support the strategic growth of the Index business. You will be involved in the development of complex test tools and solutions as well as new test frameworks, starting from a blank slate in some cases, to help ensure the quality of a greenfield application build.
        Join Us as a Software Development Engineer in Test (SDET)! Overview - We are looking for a Software Development Engineer in Test (SDET) or automation tester who comes from a Java Software Development background. The role is to assist in the development of the new Index platform for the FTSE-Russell Index business of the London Stock Exchange Group (LSEG). The Index Platform team performs the calculation, maintenance and distribution of Index products. You will be working on innovative technologies with a team of engineers to implement solutions which support the strategic growth of the Index business. You will be involved in the development of complex test tools and solutions as well as new test frameworks, starting from a blank slate in some cases, to help ensure the quality of a greenfield application build.
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        Node.JS Developer

        Anson Mccade
        South East
        GBP 475.00 per week;GBP 475.00 per day
        £475 GBP - Onsite WORKING - Location: Central London, Greater London - United Kingdom Type: Permanent - Contract Opportunity: Node.js Developer - Hybrid (2-3 days onsite in London) to £475/day | Outside IR35 | 3 months (likely extension) We're working with a leading consultancy on a fast-paced delivery programme for a major UK client and need a talented Node.js Developer to join the team. You'll be joining a collaborative group of engineers and delivery leads to help build out scalable backend services as part of a wider digital transformation programme. * Developing clean, efficient Node.js microservices * Integrating with APIs and external data sources * Collaborating with architects and DevOps engineers to deliver secure, scalable solutions * Participating in code reviews and agile ceremonies * Strong experience in Node.js and JavaScript (TypeScript a bonus)
        £475 GBP - Onsite WORKING - Location: Central London, Greater London - United Kingdom Type: Permanent - Contract Opportunity: Node.js Developer - Hybrid (2-3 days onsite in London) to £475/day | Outside IR35 | 3 months (likely extension) We're working with a leading consultancy on a fast-paced delivery programme for a major UK client and need a talented Node.js Developer to join the team. You'll be joining a collaborative group of engineers and delivery leads to help build out scalable backend services as part of a wider digital transformation programme. * Developing clean, efficient Node.js microservices * Integrating with APIs and external data sources * Collaborating with architects and DevOps engineers to deliver secure, scalable solutions * Participating in code reviews and agile ceremonies * Strong experience in Node.js and JavaScript (TypeScript a bonus)
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        PREMIUM
        We're creating a health and wellness experience that fits seamlessly into people's lives and we're using modern tech to get there. Whether it's through speed, convenience, or personalisation, we're building smarter, faster, and more engaging experiences for our customers both online and in-store. We're a cloud-first, automation-loving, build-over-buy kind of team. We move fast, collaborate deeply, and always keep our focus on delivering for our customers. About the Role - We're looking for a Senior Software Engineer to join our Loyalty Team within the BX Online vertical. This is a key moment in our journey we're wrapping up a multi-year digital transformation and embarking on the next big phase: designing and building a completely new customer loyalty proposition. You'll work across the full development lifecycle, contributing to roadmap features, shaping product dire
        We're creating a health and wellness experience that fits seamlessly into people's lives and we're using modern tech to get there. Whether it's through speed, convenience, or personalisation, we're building smarter, faster, and more engaging experiences for our customers both online and in-store. We're a cloud-first, automation-loving, build-over-buy kind of team. We move fast, collaborate deeply, and always keep our focus on delivering for our customers. About the Role - We're looking for a Senior Software Engineer to join our Loyalty Team within the BX Online vertical. This is a key moment in our journey we're wrapping up a multi-year digital transformation and embarking on the next big phase: designing and building a completely new customer loyalty proposition. You'll work across the full development lifecycle, contributing to roadmap features, shaping product dire
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        NEW
        Job Description Summary - The Digital & Marketing Technology Team is responsible for marketing technology within the LSEG Technology organization. Our current MarTech stack includes Oracle Marketing Cloud (Eloqua), Salesforce CRM, Interact and Unica (IBM), Workfront and other applications, and is growing to include additional cloud-enabled technologies to support marketing planning, marketing content, demand generation, lead flow, and marketing attribution. The Digital & Marketing Technology team is growing, and looking for versatile self-starters who want to learn new technologies and take ownership of projects. This position is responsible for driving business requirements for new technologies, managing releases, and 2nd level support and development of marketing automation platforms, including integration with other Digital Marketing tools and MarTech applications
        Job Description Summary - The Digital & Marketing Technology Team is responsible for marketing technology within the LSEG Technology organization. Our current MarTech stack includes Oracle Marketing Cloud (Eloqua), Salesforce CRM, Interact and Unica (IBM), Workfront and other applications, and is growing to include additional cloud-enabled technologies to support marketing planning, marketing content, demand generation, lead flow, and marketing attribution. The Digital & Marketing Technology team is growing, and looking for versatile self-starters who want to learn new technologies and take ownership of projects. This position is responsible for driving business requirements for new technologies, managing releases, and 2nd level support and development of marketing automation platforms, including integration with other Digital Marketing tools and MarTech applications
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        Why Deliveroo - Our mission is to transform the way you shop and eat, bringing the neighbourhood to your door by connecting consumers, restaurants, shops and riders. We are transforming the way the world eats and shops by making access to food and products more convenient and enjoyable. We give people the opportunity to buy what they want, as they want it, when and where they want it. We are a technology-driven company at the forefront of the most rapidly expanding industry in the world. We are still a small team, making a very large impact, looking to answer some of the most interesting questions out there. We move fast, value autonomy and ownership, and we are always looking for new ideas. As a Software Engineer within the Security Product Engineering team, you will be responsible for the design, development and support of security products.
        Why Deliveroo - Our mission is to transform the way you shop and eat, bringing the neighbourhood to your door by connecting consumers, restaurants, shops and riders. We are transforming the way the world eats and shops by making access to food and products more convenient and enjoyable. We give people the opportunity to buy what they want, as they want it, when and where they want it. We are a technology-driven company at the forefront of the most rapidly expanding industry in the world. We are still a small team, making a very large impact, looking to answer some of the most interesting questions out there. We move fast, value autonomy and ownership, and we are always looking for new ideas. As a Software Engineer within the Security Product Engineering team, you will be responsible for the design, development and support of security products.
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        We are looking for a dynamic and results-driven App Lead to drive the growth of our App program globally. The role is pivotal in meeting our revenue and efficiency targets, with accountability for performance against App targets globally. What You'll Be Doing * Strategy: Working with the Head of Performance Marketing and team of channel specialists to develop and execute a comprehensive global App strategy to drive growth and achieve ambitious revenue and efficiency targets. * Performance management: Be hands on in our accounts, optimising a complex, high-spending global App program across Google & Apple products. * Industry trends: Stay up to date with the latest trends and innovations in App and digital marketing. Work closely with platform partners to stay on top of emerging products and ensure we have a plan to test them at pace.
        We are looking for a dynamic and results-driven App Lead to drive the growth of our App program globally. The role is pivotal in meeting our revenue and efficiency targets, with accountability for performance against App targets globally. What You'll Be Doing * Strategy: Working with the Head of Performance Marketing and team of channel specialists to develop and execute a comprehensive global App strategy to drive growth and achieve ambitious revenue and efficiency targets. * Performance management: Be hands on in our accounts, optimising a complex, high-spending global App program across Google & Apple products. * Industry trends: Stay up to date with the latest trends and innovations in App and digital marketing. Work closely with platform partners to stay on top of emerging products and ensure we have a plan to test them at pace.
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        At Deliveroo, it is our mission to build the definitive food company. In order to do that, were building a company where everyone can belong, grow and do the best work of their lives. We're looking for a motivated and technically skilled Identity and Access Management Engineer who thrives on solving complex identity problems and building secure, scalable access management solutions. In this role, you'll be directly responsible for developing and maintaining the core tools and systems that manage identity and access across Deliveroos internal platforms. Youll work across identity providers and governance tools to design automation, improve user experience, and strengthen securityall while ensuring compliance with regulatory standards. * Implement and maintain Deliveroos Identity & Access Management services, including identity providers and identity governance platform
        At Deliveroo, it is our mission to build the definitive food company. In order to do that, were building a company where everyone can belong, grow and do the best work of their lives. We're looking for a motivated and technically skilled Identity and Access Management Engineer who thrives on solving complex identity problems and building secure, scalable access management solutions. In this role, you'll be directly responsible for developing and maintaining the core tools and systems that manage identity and access across Deliveroos internal platforms. Youll work across identity providers and governance tools to design automation, improve user experience, and strengthen securityall while ensuring compliance with regulatory standards. * Implement and maintain Deliveroos Identity & Access Management services, including identity providers and identity governance platform
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        Use Your Power for Purpose - The vision for Pfizers Digital function is a more integrated and coordinated healthcare model that improves patient outcomes, fuels tomorrows breakthrough therapies, and brings medicines to patients faster.? Within Pfizer Digital, the Customer & Commercial Creation Center (C4) group builds solutions for external customers throughout the product lifecycle?. We support stakeholders to engage external ?customers through digital solutions, whether that is patients, HCPs, payors, pharmacists, or clinical sites. The Customer & Commercial Creation Center (C4) are thought partners and technical solution providers to commercial arms of the business (e.g., Pfizers ?sales force or marketers), working at the intersection of technology and healthcare. We are an enterprise facing team that drives to provide the best DevSecOps, security, standards, and q
        Use Your Power for Purpose - The vision for Pfizers Digital function is a more integrated and coordinated healthcare model that improves patient outcomes, fuels tomorrows breakthrough therapies, and brings medicines to patients faster.? Within Pfizer Digital, the Customer & Commercial Creation Center (C4) group builds solutions for external customers throughout the product lifecycle?. We support stakeholders to engage external ?customers through digital solutions, whether that is patients, HCPs, payors, pharmacists, or clinical sites. The Customer & Commercial Creation Center (C4) are thought partners and technical solution providers to commercial arms of the business (e.g., Pfizers ?sales force or marketers), working at the intersection of technology and healthcare. We are an enterprise facing team that drives to provide the best DevSecOps, security, standards, and q
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        Our Purpose - Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary - As a Lead AI Engineer at Mastercard, you will be instrumental in designing, building, and scaling AI microservices that transform PoC notebooks into robust, production-ready components. You will play a pivotal role in creating the foundational AI services that power our next-generation solutions, ensuring they are scalable, efficient, and seamlessly
        Our Purpose - Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary - As a Lead AI Engineer at Mastercard, you will be instrumental in designing, building, and scaling AI microservices that transform PoC notebooks into robust, production-ready components. You will play a pivotal role in creating the foundational AI services that power our next-generation solutions, ensuring they are scalable, efficient, and seamlessly
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        Frequently Asked Questions

        How many permanent API jobs are there in Hatfield?
        There are 95 permanent API jobs within 20 miles of Hatfield available on CWJobs right now.

        What other similar jobs are there to permanent API jobs in Hatfield?
        As well as permanent API jobs in Hatfield, you can find permanent IT, Software Development, Management, amongst many others.