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        48 Permanent API jobs in Welwyn Garden City + 20 miles

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        Senior Software Engineer II

        Samsara Networks Limited
        London
        Competitive
        You will lead the technical vision for our core developer productsincluding our API, Eventing, Lambdas, and Marketplace. * Guide the evolution of our external API framework, ensuring it remains robust, consistent, and easy to use as our product capabilities expand.
        You will lead the technical vision for our core developer productsincluding our API, Eventing, Lambdas, and Marketplace. * Guide the evolution of our external API framework, ensuring it remains robust, consistent, and easy to use as our product capabilities expand.
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        lastupdated - 10/22/2025 - jobtitle - Job Description - Role - Technical Test Lead - Technology - Test Automation Architect - Location - London, United Kingdom - Compensation - Competitive (including bonus) Today, the corporate landscape is dynamic and the world ahead is full of possibilities! None of the amazing things we do at Infosys would be possible without an equally amazing culture, the environment where ideas can flourish and where you are empowered to move forward as far as your ideas will take you. At Infosys, we assure that your career will never stand still, we will inspire you to build what's next and we will navigate further together. Our journey of learnability, values and trusted relationships with our clients continue to be the cornerstones of our organization and these values are upheld only because of our people. Your role
        lastupdated - 10/22/2025 - jobtitle - Job Description - Role - Technical Test Lead - Technology - Test Automation Architect - Location - London, United Kingdom - Compensation - Competitive (including bonus) Today, the corporate landscape is dynamic and the world ahead is full of possibilities! None of the amazing things we do at Infosys would be possible without an equally amazing culture, the environment where ideas can flourish and where you are empowered to move forward as far as your ideas will take you. At Infosys, we assure that your career will never stand still, we will inspire you to build what's next and we will navigate further together. Our journey of learnability, values and trusted relationships with our clients continue to be the cornerstones of our organization and these values are upheld only because of our people. Your role
        more
        Design and implement complex data flows, API integrations, and background processing systems that handle high-volume operations reliably while maintaining system performance and data integrity * RESTful API design and implementation
        Design and implement complex data flows, API integrations, and background processing systems that handle high-volume operations reliably while maintaining system performance and data integrity * RESTful API design and implementation
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        This role is pivotal in connecting our core developer products (API, Eventing, Lambdas, Marketplace) to the company's next-generation AI and data platforms. * Establish and champion the technical vision and architectural governance for our external API framework, ensuring consistency, scalability, and a world-class developer experience across all of Samsara's product lines.
        This role is pivotal in connecting our core developer products (API, Eventing, Lambdas, Marketplace) to the company's next-generation AI and data platforms. * Establish and champion the technical vision and architectural governance for our external API framework, ensuring consistency, scalability, and a world-class developer experience across all of Samsara's product lines.
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        To be right for this role, you should have extensive mobile and API automation experience and the ability to self-serve by building the tooling required to support your automation efforts. * Lead an automation team to build pipelines and tooling for mobile app automation, e2e testing suites, and API testing
        To be right for this role, you should have extensive mobile and API automation experience and the ability to self-serve by building the tooling required to support your automation efforts. * Lead an automation team to build pipelines and tooling for mobile app automation, e2e testing suites, and API testing
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        NEW
        Define and manage the external access layer, creating a secure and governed API Gateway that empowers third-party developers to integrate independently. * Establish a consistent API publishing workflow for all internal squads, ensuring quality and governance as we scale our external offerings. You have a deep understanding of developer platforms and API ecosystems, with experience in both internal productivity and external integration. * Sector knowledge: You have technical fluency in areas like CI/CD, observability, API gateways, and infrastructure-as-code. Deliver a world-class external access layer, including a Developer Portal and governed API Gateway, to empower third-party developers to self-serve and integrate seamlessly.
        Define and manage the external access layer, creating a secure and governed API Gateway that empowers third-party developers to integrate independently. * Establish a consistent API publishing workflow for all internal squads, ensuring quality and governance as we scale our external offerings. You have a deep understanding of developer platforms and API ecosystems, with experience in both internal productivity and external integration. * Sector knowledge: You have technical fluency in areas like CI/CD, observability, API gateways, and infrastructure-as-code. Deliver a world-class external access layer, including a Developer Portal and governed API Gateway, to empower third-party developers to self-serve and integrate seamlessly.
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        lastupdated - 10/21/2025 - jobtitle - Job Description - Role - Sr. Technology Architect - Technology - Data Modelling, ERWIN Modelling, Azure Architect, PySpark - Location - UK(London) Data Architect should have key understanding of building Data Models, Experience in Data Architecting and Engineering space on Spark, Pyspark, ADF, Azure Synapse and Data Lake. Your role - In the role of a Sr Technology Architect, you will primarily be responsible for identifying best-fit architectural solutions for one or more projects; develop design of application, provide regular support/guidance to project teams on complex coding, issue resolution and execution - As a thought and solution leader, you will be the key advisor to architecture and design reviews. You will anchor business pursuit initiatives, client discussions, in-house capability building.
        lastupdated - 10/21/2025 - jobtitle - Job Description - Role - Sr. Technology Architect - Technology - Data Modelling, ERWIN Modelling, Azure Architect, PySpark - Location - UK(London) Data Architect should have key understanding of building Data Models, Experience in Data Architecting and Engineering space on Spark, Pyspark, ADF, Azure Synapse and Data Lake. Your role - In the role of a Sr Technology Architect, you will primarily be responsible for identifying best-fit architectural solutions for one or more projects; develop design of application, provide regular support/guidance to project teams on complex coding, issue resolution and execution - As a thought and solution leader, you will be the key advisor to architecture and design reviews. You will anchor business pursuit initiatives, client discussions, in-house capability building.
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        Cloud Architect

        PA Consulting Group Holdings Limited
        London
        Competitive
        We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our diverse teams of experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport. Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands. Job Description * Architect and Design Cloud Solutions: Design and implement end-to-end cloud solutions on Azur
        We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our diverse teams of experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport. Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands. Job Description * Architect and Design Cloud Solutions: Design and implement end-to-end cloud solutions on Azur
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        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.
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        Senior Test Engineer

        Department for Energy Security & Net Zero
        London
        £42,385 - £51,540 a year
        Lead the design and implementation of comprehensive quality strategies across platforms like Salesforce, Azure, and AWS, including test approaches (unit, integration, API, UI, performance, security, accessibility) and automation frameworks using C#, Python, Apex, and TypeScript. Proven test automation skills using tools like Selenium, Playwright, Cypress, pytest, xUnit/NUnit, or Jest for functional, integration, API, and end-to-end testing.
        Lead the design and implementation of comprehensive quality strategies across platforms like Salesforce, Azure, and AWS, including test approaches (unit, integration, API, UI, performance, security, accessibility) and automation frameworks using C#, Python, Apex, and TypeScript. Proven test automation skills using tools like Selenium, Playwright, Cypress, pytest, xUnit/NUnit, or Jest for functional, integration, API, and end-to-end testing.
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        Lead Developer

        Department for Energy Security & Net Zero
        London
        £60,620 - £67,565 a year
        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.
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        Location: Central London or Remote [Moldova] Job Type: Full time - Why join us? If you love food and technology as much as we do, youll love life at Vita Mojo. Were on a mission to revolutionise the hospitality experience for operators and their customers. Through our smart digital products, were powering the digital transformation of your favourite pubs, bars and restaurants. And we want a world where everyone gets the meal theyre hoping for. Each and every time. Our Vita Mojo DNA - Were proud to have built an award-winning digital platform. Vita Mojo is a positive, energetic and forward-thinking place to work, and when you become a Moji, youll be joining a supportive team whove always got your back. Our passion for technology and food is matched only by our support for our people. About the role - Your mission as a Vita Mojo Full Stack Engineer is to help us bring o
        Location: Central London or Remote [Moldova] Job Type: Full time - Why join us? If you love food and technology as much as we do, youll love life at Vita Mojo. Were on a mission to revolutionise the hospitality experience for operators and their customers. Through our smart digital products, were powering the digital transformation of your favourite pubs, bars and restaurants. And we want a world where everyone gets the meal theyre hoping for. Each and every time. Our Vita Mojo DNA - Were proud to have built an award-winning digital platform. Vita Mojo is a positive, energetic and forward-thinking place to work, and when you become a Moji, youll be joining a supportive team whove always got your back. Our passion for technology and food is matched only by our support for our people. About the role - Your mission as a Vita Mojo Full Stack Engineer is to help us bring o
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        NEW
        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
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        Technical Architect

        Bicycle Therapeutics
        Cambridge, Cambridgeshire
        Competitive
        Bicycle Therapeutics is a clinical-stage pharmaceutical company developing a novel class of medicines, referred to as Bicycle molecules, for diseases that are underserved by existing therapeutics. Bicycle molecules are fully synthetic short peptides constrained with small molecule scaffolds to form two loops that stabilize their structural geometry. This constraint facilitates target binding with high affinity and selectivity, making Bicycle molecules attractive candidates for drug development. The company is evaluating zelenectide pevedotin (formerly BT8009), a Bicycle Drug Conjugate (BDC) targeting Nectin-4, a well-validated tumor antigen; BT5528, a BDC molecule targeting EphA2, a historically undruggable target; and BT7480, a Bicycle Tumor-Targeted Immune Cell Agonist (Bicycle TICA) targeting Nectin-4 and agonizing CD137, in company-sponsored clinical trials.
        Bicycle Therapeutics is a clinical-stage pharmaceutical company developing a novel class of medicines, referred to as Bicycle molecules, for diseases that are underserved by existing therapeutics. Bicycle molecules are fully synthetic short peptides constrained with small molecule scaffolds to form two loops that stabilize their structural geometry. This constraint facilitates target binding with high affinity and selectivity, making Bicycle molecules attractive candidates for drug development. The company is evaluating zelenectide pevedotin (formerly BT8009), a Bicycle Drug Conjugate (BDC) targeting Nectin-4, a well-validated tumor antigen; BT5528, a BDC molecule targeting EphA2, a historically undruggable target; and BT7480, a Bicycle Tumor-Targeted Immune Cell Agonist (Bicycle TICA) targeting Nectin-4 and agonizing CD137, in company-sponsored clinical trials.
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        NEW
        Any company can tell you about how they are a multi award winning, market leading business and yes, we are both of those things in the world of IoT connectivity! But were more than that. Our mission? To make IoT management a breeze for any device, anywhere. With over 10 million IoT subscriptions active in 165 countries and direct partnerships with 50 mobile networks, we connect you to more than 750 networks worldwide, delivering unmatched value across the IoT connectivity chain. Innovation is in our DNA, and we have an insatiable hunger to wow! While we may not always get it right, our drive to collaborate, innovate, and achieve top-notch customer satisfaction never wavers. We offer industry expertise, stellar service support, and the most flexible, resilient, and secure connectivity solutions on the market.
        Any company can tell you about how they are a multi award winning, market leading business and yes, we are both of those things in the world of IoT connectivity! But were more than that. Our mission? To make IoT management a breeze for any device, anywhere. With over 10 million IoT subscriptions active in 165 countries and direct partnerships with 50 mobile networks, we connect you to more than 750 networks worldwide, delivering unmatched value across the IoT connectivity chain. Innovation is in our DNA, and we have an insatiable hunger to wow! While we may not always get it right, our drive to collaborate, innovate, and achieve top-notch customer satisfaction never wavers. We offer industry expertise, stellar service support, and the most flexible, resilient, and secure connectivity solutions on the market.
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        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
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        Description - This is an exciting opportunity for a service delivery engineer (SDE) to play a key role in operating our innovative managed services. Working across our managed detection and response (MDR) and extended detection and response (XDR) offerings, the individual will be responsible for supporting customers throughout their time with Solis, from their initial technical onboarding to regular health checks and maintenance to ensure the service runs smoothly and effectively. This is a customer-facing role requiring strong verbal and written communication skills. Foundational technical knowledge is also key to ensure our tools are deployed and configured correctly. The candidate will also support the ongoing improvement of service delivery processes. Key Responsibilities - Onboarding and Maintenance
        Description - This is an exciting opportunity for a service delivery engineer (SDE) to play a key role in operating our innovative managed services. Working across our managed detection and response (MDR) and extended detection and response (XDR) offerings, the individual will be responsible for supporting customers throughout their time with Solis, from their initial technical onboarding to regular health checks and maintenance to ensure the service runs smoothly and effectively. This is a customer-facing role requiring strong verbal and written communication skills. Foundational technical knowledge is also key to ensure our tools are deployed and configured correctly. The candidate will also support the ongoing improvement of service delivery processes. Key Responsibilities - Onboarding and Maintenance
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        NEW
        Company Overview - At Motorola Solutions, we believe that everything starts with our people. Were a global close-knit community, united by the relentless pursuit to help keep people safer everywhere. Our critical communications, video security and command center technologies support public safety agencies and enterprises alike, enabling the coordination thats critical for safer communities, safer schools, safer hospitals and safer businesses. Connect with a career that matters, and help us build a safer future. Department Overview - The Senior Software Security Engineer will be responsible for analysing software designs and implementations from a security perspective, identifying and proposing remediations to security issues throughout the software development lifecycle (SDLC). Job Description - This role is primarily hybrid, with occasional travel to our UK offices,
        Company Overview - At Motorola Solutions, we believe that everything starts with our people. Were a global close-knit community, united by the relentless pursuit to help keep people safer everywhere. Our critical communications, video security and command center technologies support public safety agencies and enterprises alike, enabling the coordination thats critical for safer communities, safer schools, safer hospitals and safer businesses. Connect with a career that matters, and help us build a safer future. Department Overview - The Senior Software Security Engineer will be responsible for analysing software designs and implementations from a security perspective, identifying and proposing remediations to security issues throughout the software development lifecycle (SDLC). Job Description - This role is primarily hybrid, with occasional travel to our UK offices,
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        Frequently Asked Questions

        How many permanent API jobs are there in Welwyn Garden City?
        There are 48 permanent API jobs within 20 miles of Welwyn Garden City available on CWJobs right now.

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