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        33 Permanent API jobs in Hertford + 20 miles

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        Manager, Software Development

        THE POKEMON COMPANY INTERNATIONAL, INC.
        London
        Competitive
        Get to know The Pokémon Company International - The Pokémon Company International, a subsidiary of The Pokémon Company in Japan, manages the property outside of Asia and is responsible for brand management, licensing, marketing, the Pokémon Trading Card Game, the animated TV series, home entertainment, and the official Pokémon website. Pokémon was launched in Japan in 1996 and today is one of the most popular children's entertainment properties in the world. Get to know the role * Job Title: Manager, Software Development - This role is ideal for a technically adept leader with a strong understanding of modern cloud-native architectures, agile delivery, and platform engineering. Youll be responsible for ensuring the platform is scalable, resilient, and delivers a world-class shopping experience to Pokémon fans globally. * People Manager: Yes - What youll do
        Get to know The Pokémon Company International - The Pokémon Company International, a subsidiary of The Pokémon Company in Japan, manages the property outside of Asia and is responsible for brand management, licensing, marketing, the Pokémon Trading Card Game, the animated TV series, home entertainment, and the official Pokémon website. Pokémon was launched in Japan in 1996 and today is one of the most popular children's entertainment properties in the world. Get to know the role * Job Title: Manager, Software Development - This role is ideal for a technically adept leader with a strong understanding of modern cloud-native architectures, agile delivery, and platform engineering. Youll be responsible for ensuring the platform is scalable, resilient, and delivers a world-class shopping experience to Pokémon fans globally. * People Manager: Yes - What youll do
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        Senior Data Engineer - London - Live shows make us feel good. They're a time to hang with our friends, discover new artists or lose ourselves on a dancefloor. We're on a mission to bring all of this to more fans, more often and that's where you come in. We're looking for a Senior Data Engineer to join our rapidly evolving Data Platform team, to help us scale our data platform to make DICE more reliable and impactful for our partners and customers. At DICE, you'll be part of the company that's redefining live entertainment. It's a place where you can be yourself, influence the culture, and create work that you're proud of. About the role - You're an experienced individual who is passionate about building and scaling data products, enhancing data platforms, and comfortable supporting the diverse needs of multiple teams.
        Senior Data Engineer - London - Live shows make us feel good. They're a time to hang with our friends, discover new artists or lose ourselves on a dancefloor. We're on a mission to bring all of this to more fans, more often and that's where you come in. We're looking for a Senior Data Engineer to join our rapidly evolving Data Platform team, to help us scale our data platform to make DICE more reliable and impactful for our partners and customers. At DICE, you'll be part of the company that's redefining live entertainment. It's a place where you can be yourself, influence the culture, and create work that you're proud of. About the role - You're an experienced individual who is passionate about building and scaling data products, enhancing data platforms, and comfortable supporting the diverse needs of multiple teams.
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        Software Developer

        Gallagher Bassett International Ltd
        Sidcup, London
        Competitive
        Introduction - Join our growing team of dedicated professionals at Gallagher Bassett, who guide those in need to the best possible outcomes for their health and wellbeing. You'll be part of a resilient team that works together to redefine the boundaries of excellence. At our organization, we value collaboration and making a positive impact in the lives of our clients and claimants, offering you the opportunity to join a team where your skills and dedication can truly make a difference. We believe that every candidate brings something special to the table, including you! So, even if you feel that youre close but not an exact match, we encourage you to apply. Overview - We are looking for a Software Developer to join our team and contribute to the design, development, and maintenance of software systems that support key business operations.
        Introduction - Join our growing team of dedicated professionals at Gallagher Bassett, who guide those in need to the best possible outcomes for their health and wellbeing. You'll be part of a resilient team that works together to redefine the boundaries of excellence. At our organization, we value collaboration and making a positive impact in the lives of our clients and claimants, offering you the opportunity to join a team where your skills and dedication can truly make a difference. We believe that every candidate brings something special to the table, including you! So, even if you feel that youre close but not an exact match, we encourage you to apply. Overview - We are looking for a Software Developer to join our team and contribute to the design, development, and maintenance of software systems that support key business operations.
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        Are you a visionary technology leader who thrives on solving complex architectural challenges and delivering large-scale digital solutions? Do you have a passion for shaping strategy and driving innovation for market-leading clients? If so, EPAM invites you to take on a career-defining role as our UK Head of Solution Architecture and Technology Consulting (Senior Director) . Reporting to the European Head of Practice, you will partner closely with the UK and European multi-seniority technical and business teams to help drive strategic growth with existing and future clients, inspire and advance our architectural initiatives, ensuring alignment with our technological capabilities and business goals. This is not solely a high-level strategic role; it demands extensive hands-on expertise in solution architecture, software development, client engagement, technology ...
        Are you a visionary technology leader who thrives on solving complex architectural challenges and delivering large-scale digital solutions? Do you have a passion for shaping strategy and driving innovation for market-leading clients? If so, EPAM invites you to take on a career-defining role as our UK Head of Solution Architecture and Technology Consulting (Senior Director) . Reporting to the European Head of Practice, you will partner closely with the UK and European multi-seniority technical and business teams to help drive strategic growth with existing and future clients, inspire and advance our architectural initiatives, ensuring alignment with our technological capabilities and business goals. This is not solely a high-level strategic role; it demands extensive hands-on expertise in solution architecture, software development, client engagement, technology ...
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        Shape the Future of Service Excellence with Ten! Driving Innovation. Building Trust. Redefining Service Excellence. Ten is on a mission to become the most trusted service business in the world. We service the most valuable customers of the worlds leading private banks, premium financial services and luxury brands globally including HSBC, Bank of America, Swisscard and Royal Bank of Canada. Corporate clients use Tens services to acquire, engage and retain affluent, high net worth customers or valued employees. The service drives critical customer metrics, including revenue growth, net promoter score, and supports digital transformation initiatives. Millions of individuals worldwide have access to Ten's services across lifestyle, travel, dining and entertainment. They rely on Ten to unlock seamless, curated experiences that enrich their lives.
        Shape the Future of Service Excellence with Ten! Driving Innovation. Building Trust. Redefining Service Excellence. Ten is on a mission to become the most trusted service business in the world. We service the most valuable customers of the worlds leading private banks, premium financial services and luxury brands globally including HSBC, Bank of America, Swisscard and Royal Bank of Canada. Corporate clients use Tens services to acquire, engage and retain affluent, high net worth customers or valued employees. The service drives critical customer metrics, including revenue growth, net promoter score, and supports digital transformation initiatives. Millions of individuals worldwide have access to Ten's services across lifestyle, travel, dining and entertainment. They rely on Ten to unlock seamless, curated experiences that enrich their lives.
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        We are seeking a DevOps Engineer to join our Computational Development team in the UK. The ideal candidate will have a strong willingness to collaborate and grow within a team that values modern software delivery practices. This role centers on supporting CI/CD pipeline development, infrastructure automation, and deployment workflows using industry-standard DevOps tools and approaches. Your next role - As part of our code development team, you will contribute to the modernization of engineering practices across a multidisciplinary consultancy. Youll work closely with developers, product owners, and technical leads to help deliver high-quality, maintainable solutions that support the needs of the Architecture, Engineering, and Construction (AEC) industry. Key duties - Software Development (C# / .NET) * Develop and maintain applications and toolkits using C# and .NET.
        We are seeking a DevOps Engineer to join our Computational Development team in the UK. The ideal candidate will have a strong willingness to collaborate and grow within a team that values modern software delivery practices. This role centers on supporting CI/CD pipeline development, infrastructure automation, and deployment workflows using industry-standard DevOps tools and approaches. Your next role - As part of our code development team, you will contribute to the modernization of engineering practices across a multidisciplinary consultancy. Youll work closely with developers, product owners, and technical leads to help deliver high-quality, maintainable solutions that support the needs of the Architecture, Engineering, and Construction (AEC) industry. Key duties - Software Development (C# / .NET) * Develop and maintain applications and toolkits using C# and .NET.
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        About Lendable - Lendable is on a mission to make consumer finance amazing: faster, cheaper, and friendlier. * One of the UKs newest unicorns with a team of just over 600 people * Among the fastest-growing tech companies in the UK * Profitable since 2017 * Backed by top investors including Balderton Capital and Goldman Sachs * Loved by customers with the best reviews in the market (4.9 across 10,000s of reviews on Trustpilot) So far, weve rebuilt the Big Three consumer finance products from scratch: loans, credit cards and car finance . We get money into our customers hands in minutes instead of days. Were growing fast, and theres a lot more to do: were going after the two biggest Western markets (UK and US) where trillions worth of financial products are held by big banks with dated systems and painful processes. Join us if you want to * Take ownership across a broad
        About Lendable - Lendable is on a mission to make consumer finance amazing: faster, cheaper, and friendlier. * One of the UKs newest unicorns with a team of just over 600 people * Among the fastest-growing tech companies in the UK * Profitable since 2017 * Backed by top investors including Balderton Capital and Goldman Sachs * Loved by customers with the best reviews in the market (4.9 across 10,000s of reviews on Trustpilot) So far, weve rebuilt the Big Three consumer finance products from scratch: loans, credit cards and car finance . We get money into our customers hands in minutes instead of days. Were growing fast, and theres a lot more to do: were going after the two biggest Western markets (UK and US) where trillions worth of financial products are held by big banks with dated systems and painful processes. Join us if you want to * Take ownership across a broad
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        London - As the most trusted and fastest-growing global crypto company, it helps millions of people worldwide safely access cryptocurrency. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time. We are looking for software engineers from a variety of technical backgrounds with a proven track record in building scalable, reliable and performant systems. You will play a critical role in building financial and crypto-native products, services and APIs. As a Senior Back-End Engineer you should lead by example - driving the technical discussions, influencing the approach and making a positive impact on the team's development by advocating the best engineering practices.
        London - As the most trusted and fastest-growing global crypto company, it helps millions of people worldwide safely access cryptocurrency. Offering the largest production blockchain platform in the world, we share the passion to code, create, and ultimately build an open, accessible and fair financial future, one piece of software at a time. We are looking for software engineers from a variety of technical backgrounds with a proven track record in building scalable, reliable and performant systems. You will play a critical role in building financial and crypto-native products, services and APIs. As a Senior Back-End Engineer you should lead by example - driving the technical discussions, influencing the approach and making a positive impact on the team's development by advocating the best engineering practices.
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        Introduction - Join us at Gallagher Re, the trailblazers of the reinsurance world, where every day brings new opportunities to shape the future. We empower our clients with cutting-edge analytics and insights, providing them the confidence to make strategic decisions that transform industries. As a team member, you'll be at the forefront of innovation, translating data into impactful solutions and taking the reins of your career like never before. We believe that every candidate brings something special to the table, including you! So, even if you feel that youre close but not an exact match, we encourage you to apply. Overview - We are seeking a skilled Full-Stack Product Manager to own the delivery of technology products within our Digital and Technology function. This role supports our Analytics partners (catastrophe modelling and actuarial teams) in driving busine
        Introduction - Join us at Gallagher Re, the trailblazers of the reinsurance world, where every day brings new opportunities to shape the future. We empower our clients with cutting-edge analytics and insights, providing them the confidence to make strategic decisions that transform industries. As a team member, you'll be at the forefront of innovation, translating data into impactful solutions and taking the reins of your career like never before. We believe that every candidate brings something special to the table, including you! So, even if you feel that youre close but not an exact match, we encourage you to apply. Overview - We are seeking a skilled Full-Stack Product Manager to own the delivery of technology products within our Digital and Technology function. This role supports our Analytics partners (catastrophe modelling and actuarial teams) in driving busine
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        At Lunar Energy, we're on a mission to transform the way we power our homes by building an ecosystem of all-electric products, starting with a next-generation home battery system and a cloud PaaS to manage large fleets of Distributed Energy Resources (DER) assets. Comprising a team of visionary entrepreneurs and dedicated technology and industry experts, we're united by our shared vision of deploying and building products to electrify homes that are connected through an integrated software platform. We're looking for a Staff Software Engineer to join our talented team of Software Engineers in the UK. * Building the required platform infrastructure to ingest and process big streams of data in real time, using AWS primitives * Solving complex optimisation problems, using machine learning and other often bespoke algorithms
        At Lunar Energy, we're on a mission to transform the way we power our homes by building an ecosystem of all-electric products, starting with a next-generation home battery system and a cloud PaaS to manage large fleets of Distributed Energy Resources (DER) assets. Comprising a team of visionary entrepreneurs and dedicated technology and industry experts, we're united by our shared vision of deploying and building products to electrify homes that are connected through an integrated software platform. We're looking for a Staff Software Engineer to join our talented team of Software Engineers in the UK. * Building the required platform infrastructure to ingest and process big streams of data in real time, using AWS primitives * Solving complex optimisation problems, using machine learning and other often bespoke algorithms
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        Full Time Retail & Brand Solutions Team - VoucherCodes is part of Ziff Davis Shopping, which helps millions of shoppers discover and save, delivering exceptional consumer and merchant-advertiser experiences across a portfolio of leading mobile and ecommerce brands. We operate across multiple markets, connecting millions of consumers with top retailers worldwide. Right now, we're looking for a Test Engineer to work as part of our Engineering team in London. You will be joining a team of 25+ engineers in the UK across web, mobile and data, within a global team of 50+ engineers. As a Test Engineer you will be ensuring features are tested in an automated fashion to ensure maximum coverage to give our users the best possible experience. You know how testing fits within an agile environment and have an excellent attention to detail and are passionate about quality.
        Full Time Retail & Brand Solutions Team - VoucherCodes is part of Ziff Davis Shopping, which helps millions of shoppers discover and save, delivering exceptional consumer and merchant-advertiser experiences across a portfolio of leading mobile and ecommerce brands. We operate across multiple markets, connecting millions of consumers with top retailers worldwide. Right now, we're looking for a Test Engineer to work as part of our Engineering team in London. You will be joining a team of 25+ engineers in the UK across web, mobile and data, within a global team of 50+ engineers. As a Test Engineer you will be ensuring features are tested in an automated fashion to ensure maximum coverage to give our users the best possible experience. You know how testing fits within an agile environment and have an excellent attention to detail and are passionate about quality.
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        Do you want your voice heard and your actions to count? Discover your opportunity with Mitsubishi UFJ Financial Group (MUFG), one of the worlds leading financial groups. Across the globe, were 150,000 colleagues, striving to make a difference for every client, organization, and community we serve. We stand for our values, building long-term relationships, serving society, and fostering shared and sustainable growth for a better world. With a vision to be the worlds most trusted financial group, its part of our culture to put people first, listen to new and diverse ideas and collaborate toward greater innovation, speed and agility. This means investing in talent, technologies, and tools that empower you to own your career. Join MUFG, where being inspired is expected and making a meaningful impact is rewarded. We are MUFG. 360 years of heritage. A world-class set of bus
        Do you want your voice heard and your actions to count? Discover your opportunity with Mitsubishi UFJ Financial Group (MUFG), one of the worlds leading financial groups. Across the globe, were 150,000 colleagues, striving to make a difference for every client, organization, and community we serve. We stand for our values, building long-term relationships, serving society, and fostering shared and sustainable growth for a better world. With a vision to be the worlds most trusted financial group, its part of our culture to put people first, listen to new and diverse ideas and collaborate toward greater innovation, speed and agility. This means investing in talent, technologies, and tools that empower you to own your career. Join MUFG, where being inspired is expected and making a meaningful impact is rewarded. We are MUFG. 360 years of heritage. A world-class set of bus
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        Test Engineer II

        Retailmenot UK Ltd (Vouchercode.co.uk)
        London
        Competitive
        VoucherCodes is part of Ziff Davis Shopping, which helps millions of shoppers discover and save, delivering exceptional consumer and merchant-advertiser experiences across a portfolio of leading mobile and ecommerce brands. We operate across multiple markets, connecting millions of consumers with top retailers worldwide. Right now, were looking for a Test Engineer to work as part of our Engineering team in London. You will be joining a team of 25+ engineers in the UK across web, mobile and data, within a global team of 50+ engineers. As a Test Engineer you will be ensuring features are tested in an automated fashion to ensure maximum coverage to give our users the best possible experience. You know how testing fits within an agile environment and have an excellent attention to detail and are passionate about quality.
        VoucherCodes is part of Ziff Davis Shopping, which helps millions of shoppers discover and save, delivering exceptional consumer and merchant-advertiser experiences across a portfolio of leading mobile and ecommerce brands. We operate across multiple markets, connecting millions of consumers with top retailers worldwide. Right now, were looking for a Test Engineer to work as part of our Engineering team in London. You will be joining a team of 25+ engineers in the UK across web, mobile and data, within a global team of 50+ engineers. As a Test Engineer you will be ensuring features are tested in an automated fashion to ensure maximum coverage to give our users the best possible experience. You know how testing fits within an agile environment and have an excellent attention to detail and are passionate about quality.
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        ML Ops Engineer

        ELEMENT MATERIALS TECHNOLOGY LIMITED
        London
        Competitive
        Job Locations UK-London | Work From Your Own Home - 2025-17178 - Overview - We are seeking a highly skilled ML Ops Engineer to join our growing data team. This role is critical in designing and implementing robust, scalable, and efficient data systems that power analytics, machine learning models, and business insights. The ideal candidate will have expertise in data pipeline orchestration (e.g., Airflow), data lake and warehouse architecture and development, infrastructure as code (IaC) using Terraform , and data extraction from both structured and unstructured data sources (e.g. websites). Knowledge using the Microsoft Azure ecosystem, MLOps, Kubernetes , and other modern data engineering practices. Responsibilities * Leverage best practices in schema design, partitioning, and optimisation for efficient storage and retrieval.
        Job Locations UK-London | Work From Your Own Home - 2025-17178 - Overview - We are seeking a highly skilled ML Ops Engineer to join our growing data team. This role is critical in designing and implementing robust, scalable, and efficient data systems that power analytics, machine learning models, and business insights. The ideal candidate will have expertise in data pipeline orchestration (e.g., Airflow), data lake and warehouse architecture and development, infrastructure as code (IaC) using Terraform , and data extraction from both structured and unstructured data sources (e.g. websites). Knowledge using the Microsoft Azure ecosystem, MLOps, Kubernetes , and other modern data engineering practices. Responsibilities * Leverage best practices in schema design, partitioning, and optimisation for efficient storage and retrieval.
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        Join us to build powerful data pipelines, integrate AI, and turn complex data into clear, actionable insights. If you're a Data Engineer with an interest in automation, analytics, and impactwe want to hear from you. Why Join IDX? Not Just Any Brands: See your work come to life for iconic brands like Rolls-Royce, Vodafone and Bupa. Collaborative Spirit: Work alongside passionate innovators who share your thirst for progress. Continuous Learning: Grow your skills with ongoing training, mentorship, and the freedom to experiment. Fast Paced & Fun: Thrive in a dynamic environment where big ideas and bold action collide. Cutting-Edge Technology: Play with the latest analytics tools, use AR to build immersive digital events, and explore the future of brand storytelling! Global Presence: We Get It Done morning, day and night with offices across multiple time-zones! Our Perks:
        Join us to build powerful data pipelines, integrate AI, and turn complex data into clear, actionable insights. If you're a Data Engineer with an interest in automation, analytics, and impactwe want to hear from you. Why Join IDX? Not Just Any Brands: See your work come to life for iconic brands like Rolls-Royce, Vodafone and Bupa. Collaborative Spirit: Work alongside passionate innovators who share your thirst for progress. Continuous Learning: Grow your skills with ongoing training, mentorship, and the freedom to experiment. Fast Paced & Fun: Thrive in a dynamic environment where big ideas and bold action collide. Cutting-Edge Technology: Play with the latest analytics tools, use AR to build immersive digital events, and explore the future of brand storytelling! Global Presence: We Get It Done morning, day and night with offices across multiple time-zones! Our Perks:
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        Are you a passionate and experienced Senior Product Manager looking to make a significant impact at a rapidly growing fintech scale-up? Octopus Money is on a mission to simplify financial planning, and we're looking for a talented individual to join our team and help us build innovative products that empower our users. As a Senior Product Manager, you'll be instrumental in shaping the future of our platform. You'll lead a dedicated squad, taking products from initial discovery all the way through to delivery and ongoing maintenance. This role is perfect for someone who thrives in a fast-paced, ambiguous environment and is excited by the challenge of building something truly transformative. Why Octopus Money? At Octopus Money, we're on a mission to make money advice accessible to all because the right advice can turn your life dreams into reality.
        Are you a passionate and experienced Senior Product Manager looking to make a significant impact at a rapidly growing fintech scale-up? Octopus Money is on a mission to simplify financial planning, and we're looking for a talented individual to join our team and help us build innovative products that empower our users. As a Senior Product Manager, you'll be instrumental in shaping the future of our platform. You'll lead a dedicated squad, taking products from initial discovery all the way through to delivery and ongoing maintenance. This role is perfect for someone who thrives in a fast-paced, ambiguous environment and is excited by the challenge of building something truly transformative. Why Octopus Money? At Octopus Money, we're on a mission to make money advice accessible to all because the right advice can turn your life dreams into reality.
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        Familiarity with API testing and integration diagnostics
        Familiarity with API testing and integration diagnostics
        NEW
        Minimum of 5 years experience as a C# Developer with proficiency in Python, .NET framework and C# as well as experience with ML.NET, ASP.NET, MVC, Web API Containers (Docker/Kubernetes), Machine Learning Operations (MLOps) and CI/CD
        Minimum of 5 years experience as a C# Developer with proficiency in Python, .NET framework and C# as well as experience with ML.NET, ASP.NET, MVC, Web API Containers (Docker/Kubernetes), Machine Learning Operations (MLOps) and CI/CD
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        Replacement of current EDI provider for EMEA, with delivery through new global API led integrations - Rollout of B2B E-Invoicing compliance for Belgium, France and Germany with transition to new global API led integrations.
        Replacement of current EDI provider for EMEA, with delivery through new global API led integrations - Rollout of B2B E-Invoicing compliance for Belgium, France and Germany with transition to new global API led integrations.
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        Manage the Kong API Gateway to allow external ingress traffic into the DataCamp Platform. * You have experience with API-gateways or service meshes (Kong, Istio, etc)
        Manage the Kong API Gateway to allow external ingress traffic into the DataCamp Platform. * You have experience with API-gateways or service meshes (Kong, Istio, etc)
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        Frequently Asked Questions

        How many permanent API jobs are there in Hertford?
        There are 33 permanent API jobs within 20 miles of Hertford available on CWJobs right now.

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