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        95 Permanent API jobs in Essex + 20 miles

        273 exact matches jobs are outside your preferred location

        Senior Software Engineer

        ClearCourse
        Europe
        To define
        ClearCourse - Location: Remote - Salary: Competitive + Bonus + Benefits - Role Type: Full-Time, Permanent - Shape the Future of SaaS in a Hands-On, High-Impact Engineering Role - Are you a highly skilled C#/.NET and Angular developer with a passion for building clean, scalable software in a modern tech environment? Are you looking for the freedom to make meaningful technical decisions, mentor others, and contribute to a long-standing SaaS product used by thousands? Were seeking a Senior Software Engineer to join our small, agile development team at ClearCourse. Youll play a key role in designing, building, and maintaining a feature-rich, high-availability application hosted on Azurewhile influencing decisions across architecture, testing, performance, and quality. * C# 7+ / .NET * Angular 13+ * SQL Server * Redis * APIs and Integrations * Message Queues * CI/CD Pipeli
        ClearCourse - Location: Remote - Salary: Competitive + Bonus + Benefits - Role Type: Full-Time, Permanent - Shape the Future of SaaS in a Hands-On, High-Impact Engineering Role - Are you a highly skilled C#/.NET and Angular developer with a passion for building clean, scalable software in a modern tech environment? Are you looking for the freedom to make meaningful technical decisions, mentor others, and contribute to a long-standing SaaS product used by thousands? Were seeking a Senior Software Engineer to join our small, agile development team at ClearCourse. Youll play a key role in designing, building, and maintaining a feature-rich, high-availability application hosted on Azurewhile influencing decisions across architecture, testing, performance, and quality. * C# 7+ / .NET * Angular 13+ * SQL Server * Redis * APIs and Integrations * Message Queues * CI/CD Pipeli
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        NEWFEATURED
        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 60+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 60+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
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        NEW
        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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        NEW
        Job Title - Job Description - In late January, we announced that Bridgefield Capital signed an agreement to acquire Philips Emergency Care business which includes leading brands and products like HeartStart AEDs, Intrepid and DFM100 monitor defibrillators, Tempus monitor and Tempus ALS systems, and Corsium and ECI informatics solutions. We expect the transaction to close at the end of 2025. With Bridgefields support and building on our 40+ year legacy of growth and innovation in emergency medical technology, the Emergency Care business will continue passionately pursuing our mission of saving lives, lowering the cost of healthcare, and advancing the science of resuscitation while serving the public access AED, EMS, military, and hospital market segments. In this role and as part of an agile company that has the dedicated resources needed to achieve its strategic goals
        Job Title - Job Description - In late January, we announced that Bridgefield Capital signed an agreement to acquire Philips Emergency Care business which includes leading brands and products like HeartStart AEDs, Intrepid and DFM100 monitor defibrillators, Tempus monitor and Tempus ALS systems, and Corsium and ECI informatics solutions. We expect the transaction to close at the end of 2025. With Bridgefields support and building on our 40+ year legacy of growth and innovation in emergency medical technology, the Emergency Care business will continue passionately pursuing our mission of saving lives, lowering the cost of healthcare, and advancing the science of resuscitation while serving the public access AED, EMS, military, and hospital market segments. In this role and as part of an agile company that has the dedicated resources needed to achieve its strategic goals
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        NEW
        Market Enterprise Functions - At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good. Your impact - At Jacobs, we are always looking beyond raising the bar and delivering with excellence. We apply our expertise and knowledge as we look to the future with great optimism and focus. We give our best and know that were making a difference. Bring your legal expertise and proven success as a corporate attorney and join our team of legal advisors who help shape the future of Jacobs. The Software Engineering Manager will play an important role in Jacobs Global Technical Excellence team, focusing on managing soft
        Market Enterprise Functions - At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good. Your impact - At Jacobs, we are always looking beyond raising the bar and delivering with excellence. We apply our expertise and knowledge as we look to the future with great optimism and focus. We give our best and know that were making a difference. Bring your legal expertise and proven success as a corporate attorney and join our team of legal advisors who help shape the future of Jacobs. The Software Engineering Manager will play an important role in Jacobs Global Technical Excellence team, focusing on managing soft
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        Full Stack Developer - Must have an Active DV Clearance - Hybrid - Location: Bristol, London, Manchester or Cambridge - Salary: £70,000 - £120,000 (depending on experience and clearance) We are looking for a Full Stack Developer to join a growing public sector team delivering secure, high-impact digital services across Defence & Security. This is a unique opportunity to use your development expertise to help solve real-world challenges for government and national security clients. You'll work on meaningful projects in an agile environment, applying your skills across the full software development lifecycle - from design through to deployment. You'll be part of a collaborative and supportive engineering team, working alongside technical leads, project managers, and stakeholders to deliver robust and scalable solutions.
        Full Stack Developer - Must have an Active DV Clearance - Hybrid - Location: Bristol, London, Manchester or Cambridge - Salary: £70,000 - £120,000 (depending on experience and clearance) We are looking for a Full Stack Developer to join a growing public sector team delivering secure, high-impact digital services across Defence & Security. This is a unique opportunity to use your development expertise to help solve real-world challenges for government and national security clients. You'll work on meaningful projects in an agile environment, applying your skills across the full software development lifecycle - from design through to deployment. You'll be part of a collaborative and supportive engineering team, working alongside technical leads, project managers, and stakeholders to deliver robust and scalable solutions.
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        PREMIUM
        FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes.
        FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes.
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        Data Engineer

        Anson Mccade
        South East
        GBP 55,000.00 per year;GBP 45,000.00 per year
        £55000 GBP - Onsite WORKING - Location: Central London, Greater London - United Kingdom Type: Permanent - Hybrid (2-3 days on-site) - UK-based £45,000-£55,000 + Benefits - Join a growing international team at the forefront of Generative AI and data innovation. You'll be working within a developing, cross-functional environment, building and maintaining high-quality, secure datasets that underpin critical internal projects. This is a unique opportunity to apply your data engineering skills to a high-impact, defence-focused setting where your work directly supports national capability. * Designing, deploying, and optimising secure and resilient data pipelines * Collaborating with internal stakeholders to ensure datasets are tailored, reliable, and compliant with governance standards * Applying your expertise in data management, processing, and quality assurance
        £55000 GBP - Onsite WORKING - Location: Central London, Greater London - United Kingdom Type: Permanent - Hybrid (2-3 days on-site) - UK-based £45,000-£55,000 + Benefits - Join a growing international team at the forefront of Generative AI and data innovation. You'll be working within a developing, cross-functional environment, building and maintaining high-quality, secure datasets that underpin critical internal projects. This is a unique opportunity to apply your data engineering skills to a high-impact, defence-focused setting where your work directly supports national capability. * Designing, deploying, and optimising secure and resilient data pipelines * Collaborating with internal stakeholders to ensure datasets are tailored, reliable, and compliant with governance standards * Applying your expertise in data management, processing, and quality assurance
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        PREMIUM
        Join Us as a Senior 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 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 Senior 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 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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        We are looking for an experienced individual in IT business analysis to take up the role of Senior IT Business Analyst to lead the requirements management process and be involved in the complete product delivery life cycle from conceptualisation to production. The role requires working closely with Product, Engineering and Operations teams to capture, review and build requirements for new product launches and improvements to existing features on the FX Matching Venue. The role presents an opportunity work in a fast-paced high performance environment to deliver value to our customers. Main Responsibilities * Work with product, architecture, engineering, operations teams to produce and sign-off requirements. * Use a multitude of ways to elaborate requirements including diagrams, flowcharts, tables, text to improve the understanding of requirements.
        We are looking for an experienced individual in IT business analysis to take up the role of Senior IT Business Analyst to lead the requirements management process and be involved in the complete product delivery life cycle from conceptualisation to production. The role requires working closely with Product, Engineering and Operations teams to capture, review and build requirements for new product launches and improvements to existing features on the FX Matching Venue. The role presents an opportunity work in a fast-paced high performance environment to deliver value to our customers. Main Responsibilities * Work with product, architecture, engineering, operations teams to produce and sign-off requirements. * Use a multitude of ways to elaborate requirements including diagrams, flowcharts, tables, text to improve the understanding of requirements.
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        LSEG is seeking a Senior Penetration Tester to join our internal offensive security team. This role is hands-on and deeply technical, responsible for planning and driving penetration tests across a wide range of systems and applications. The successful candidate will be a skilled offensive security professional with a passion for uncovering vulnerabilities and improving security posture through thorough testing and teamwork. Key Responsibilities * Conduct in-depth penetration tests on applications, infrastructure, and cloud environments. * Take full ownership of assigned penetration testing engagements end-to-end and deliver with limited oversight. * Compile technical scoping documents, track and document assessment metadata - o Engagement details (who, what, when, where) o Testing team members and roles - o Tools and methodologies used - o Schedule and timelines
        LSEG is seeking a Senior Penetration Tester to join our internal offensive security team. This role is hands-on and deeply technical, responsible for planning and driving penetration tests across a wide range of systems and applications. The successful candidate will be a skilled offensive security professional with a passion for uncovering vulnerabilities and improving security posture through thorough testing and teamwork. Key Responsibilities * Conduct in-depth penetration tests on applications, infrastructure, and cloud environments. * Take full ownership of assigned penetration testing engagements end-to-end and deliver with limited oversight. * Compile technical scoping documents, track and document assessment metadata - o Engagement details (who, what, when, where) o Testing team members and roles - o Tools and methodologies used - o Schedule and timelines
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        Be trusted to make great things happen. Are you ready to take up a vital role in shaping some of our exciting projects? How about joining our talented team, where everyone has a voice, and together we face our clients' problems head-on. It's a diverse and inclusive work environment where world-class talent knows no distinctions. We know that different people have different priorities, which is why we're here to support you. Flexible and remote working is a central part of our culture. So, talk to us about what's ideal for you from reduced weeks to buying more leave over school holidays. And if you're returning from a career break, ask us how we can help you transition back into work with us. AtkinsRéalis, Balfour Beatty and Egis Road Operations UK are part of a consortium, creating Connect Plus Services, a unique partnership with a collective strength in highways asse
        Be trusted to make great things happen. Are you ready to take up a vital role in shaping some of our exciting projects? How about joining our talented team, where everyone has a voice, and together we face our clients' problems head-on. It's a diverse and inclusive work environment where world-class talent knows no distinctions. We know that different people have different priorities, which is why we're here to support you. Flexible and remote working is a central part of our culture. So, talk to us about what's ideal for you from reduced weeks to buying more leave over school holidays. And if you're returning from a career break, ask us how we can help you transition back into work with us. AtkinsRéalis, Balfour Beatty and Egis Road Operations UK are part of a consortium, creating Connect Plus Services, a unique partnership with a collective strength in highways asse
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        Security Architecture Secure Design Team - Role: Senior Manager Secure Design (People Leader) Grade: GG14 - 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 role has responsibility for building and setting the direction of the team, and for the teams output. Reports to: Director - Security Architecture - Key relationships & committees * Security Domain Forum (chair) * CTO / Architecture Governance * Business Aligned Principal Security Architects * CyberSecurity Engineering
        Security Architecture Secure Design Team - Role: Senior Manager Secure Design (People Leader) Grade: GG14 - 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 role has responsibility for building and setting the direction of the team, and for the teams output. Reports to: Director - Security Architecture - Key relationships & committees * Security Domain Forum (chair) * CTO / Architecture Governance * Business Aligned Principal Security Architects * CyberSecurity Engineering
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        Role Purpose - This is an exciting role in the expanding Security Architecture team at LSEG. The Architecture team reports into the Group CISO. This role is to join the team as a Senior Security Specialist with a view to strengthening and building out our assurance processes as we move from a traditional on-prem operation, into the virtual, software defined and cloud paradigm. Security Architecture Review team is responsible for reviewing the security posture of new systems alongside the Principal Security Architects; Reviewing firewall rule changes in both BAU and strategic initiatives - Successful candidate will be part of Security Architecture Review team to define the roles goals, processes and deliverable, support our strategy to Shift Left and enable the business to achieve its goals in agility and innovation. Role Responsibilities
        Role Purpose - This is an exciting role in the expanding Security Architecture team at LSEG. The Architecture team reports into the Group CISO. This role is to join the team as a Senior Security Specialist with a view to strengthening and building out our assurance processes as we move from a traditional on-prem operation, into the virtual, software defined and cloud paradigm. Security Architecture Review team is responsible for reviewing the security posture of new systems alongside the Principal Security Architects; Reviewing firewall rule changes in both BAU and strategic initiatives - Successful candidate will be part of Security Architecture Review team to define the roles goals, processes and deliverable, support our strategy to Shift Left and enable the business to achieve its goals in agility and innovation. Role Responsibilities
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        We're looking for a skilled Full-Stack Developer who thrives at the intersection of geospatial data, modern web technologies, and backend API development. Backend: Node.js, Python, .NET (or equivalent) API development * Proven experience in front-end mapping libraries and backend API development
        We're looking for a skilled Full-Stack Developer who thrives at the intersection of geospatial data, modern web technologies, and backend API development. Backend: Node.js, Python, .NET (or equivalent) API development * Proven experience in front-end mapping libraries and backend API development
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        NEW
        The Hoddesdon site has state-of-the-art Good Manufacturing Practice (GMP) standard facilities for the development of Active Pharmaceutical Ingredients (API), Formulation Development (FD) and Process Chemistry (PC).
        The Hoddesdon site has state-of-the-art Good Manufacturing Practice (GMP) standard facilities for the development of Active Pharmaceutical Ingredients (API), Formulation Development (FD) and Process Chemistry (PC).
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        NEW
        Integrate automation into Azure DevOps CI/CD pipelines and define API testing. * Lead the API testing strategy. * Experience in API testing using tools like Postman or JMeter.
        Integrate automation into Azure DevOps CI/CD pipelines and define API testing. * Lead the API testing strategy. * Experience in API testing using tools like Postman or JMeter.
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        NEW
        FIEQ Product, BNY London - At BNY, our culture allows us to run our company better and enables employees growth and success. As a leading global financial services company at the heart of the global financial system, we influence nearly 20% of the worlds investible assets. Every day, our teams harness cutting-edge AI and breakthrough technologies to collaborate with clients, driving transformative solutions that redefine industries and uplift communities worldwide. Recognized as a top destination for innovators and champions of inclusion, BNY is where bold ideas meet advanced technology and exceptional talent. Together, we power the future of finance and this is what #LifeAtBNY is all about. Join us and be part of something extraordinary. The Markets business helps our clients formulate, implement and operationalize their investment strategies.
        FIEQ Product, BNY London - At BNY, our culture allows us to run our company better and enables employees growth and success. As a leading global financial services company at the heart of the global financial system, we influence nearly 20% of the worlds investible assets. Every day, our teams harness cutting-edge AI and breakthrough technologies to collaborate with clients, driving transformative solutions that redefine industries and uplift communities worldwide. Recognized as a top destination for innovators and champions of inclusion, BNY is where bold ideas meet advanced technology and exceptional talent. Together, we power the future of finance and this is what #LifeAtBNY is all about. Join us and be part of something extraordinary. The Markets business helps our clients formulate, implement and operationalize their investment strategies.
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        NEW

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        What is the average salary for API in Essex?

        Average salary per year
        £47,499

        The average salary for a API in Essex is £47,499. API in Essex salaries range from £37,499 to £47,499.

        Frequently Asked Questions

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

        Where in Essex are these permanent jobs?
        You can find permanent jobs in Colchester, Basildon, Chelmsford.

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