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        60 Part Time API jobs in Hertfordshire + 20 miles

        Senior API Technical Consultant (GraphQL Specialist)

        Staffworx Limited
        Slough (SL1)
        market rates, outside IR35, 2 days on site
        Design and buildnext generation of high-scale SaaS platforms. We're looking for a senior/lead engineering consultant with deep expertise in GraphQL to take a leading role in developing our robust TypeScript/Node.js backend. You will be instrumental in shaping our technical direction, driving the evolution of our APIs, ensuring our services are resilient, scalable and secure within a cutting-edge, cloud-native environment (Helm, Kubernetes). The Deliverables * Design and buildsophisticated, scalable GraphQL APIs and backend services using TypeScript and Node.js. * Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Champion best practicein code quality, automated testing (Vitest, Playwright) and observability to deliver resilient, maintainable, and production-ready business logic.
        Design and buildnext generation of high-scale SaaS platforms. We're looking for a senior/lead engineering consultant with deep expertise in GraphQL to take a leading role in developing our robust TypeScript/Node.js backend. You will be instrumental in shaping our technical direction, driving the evolution of our APIs, ensuring our services are resilient, scalable and secure within a cutting-edge, cloud-native environment (Helm, Kubernetes). The Deliverables * Design and buildsophisticated, scalable GraphQL APIs and backend services using TypeScript and Node.js. * Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Champion best practicein code quality, automated testing (Vitest, Playwright) and observability to deliver resilient, maintainable, and production-ready business logic.
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        Cloud Solution Architect

        International Business Solutions Consulting Limited
        Soho, Central London (W1), W1D
        £500 per day
        Cloud Platform Engineering Lead My client, a large consultancy, is in need of a Cloud Platform Engineering Lead for a 6 month contract inside IR35 based in London offering 2 days per week remote but requiring 3 days per week on-site. The ideal candidate will have strong experience in delivering large-scale, fault-tolerant systems; setting SLOs/SLIs, Terraform and modern CI/CD tools (Azure DevOps, GitHub Actions, Harness, Jenkins, Spinnaker), Containers & orchestration (Kubernetes) and service mesh (eg, Istio), API design & security (REST/OpenAPI, mTLS, authN/Z), Scripting in Bash, PowerShell, or Python, Cloud Expertise (Depth in One, Ready to Cross-Train), Azure: ARM/Bicep, AKS, Application Gateway, API Management, Azure Storage, GCP: GKE, Cloud Load Balancing, Cloud Armor, Istio, Stackdriver, Jenkins, Apigee.
        Cloud Platform Engineering Lead My client, a large consultancy, is in need of a Cloud Platform Engineering Lead for a 6 month contract inside IR35 based in London offering 2 days per week remote but requiring 3 days per week on-site. The ideal candidate will have strong experience in delivering large-scale, fault-tolerant systems; setting SLOs/SLIs, Terraform and modern CI/CD tools (Azure DevOps, GitHub Actions, Harness, Jenkins, Spinnaker), Containers & orchestration (Kubernetes) and service mesh (eg, Istio), API design & security (REST/OpenAPI, mTLS, authN/Z), Scripting in Bash, PowerShell, or Python, Cloud Expertise (Depth in One, Ready to Cross-Train), Azure: ARM/Bicep, AKS, Application Gateway, API Management, Azure Storage, GCP: GKE, Cloud Load Balancing, Cloud Armor, Istio, Stackdriver, Jenkins, Apigee.
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        Full-Stack Software Developer

        Sanderson Government and Defence
        City of London (EC1), EC1
        Up to £520 per day
        Role: Software Developer Day Rate: £520p/d Inside IR35 Location: Central London (hybrid up to 2 days a week) Clearance required: ACTIVE SC & NPPV3 clearance. Duration: initial work package until March 2026 (scope for extension as a long-term programme) We're looking for an expert Full-Stack Java Engineer to join a high-profile, fast-moving government programme with a fixed deadline. You'll work in a large team building microservices, scalable APIs, optimised SQL, and fully containerised deployments on AWS. You'll also collaborate directly with senior stakeholders, turning complex problems into tested, working solutions. What You'll Do * Build and deploy backend services with Java & Spring Boot * Develop scalable APIs * Optimise SQL for large datasets * Work with DevOps on Docker and AWS deployments * Shape architecture and technical direction
        Role: Software Developer Day Rate: £520p/d Inside IR35 Location: Central London (hybrid up to 2 days a week) Clearance required: ACTIVE SC & NPPV3 clearance. Duration: initial work package until March 2026 (scope for extension as a long-term programme) We're looking for an expert Full-Stack Java Engineer to join a high-profile, fast-moving government programme with a fixed deadline. You'll work in a large team building microservices, scalable APIs, optimised SQL, and fully containerised deployments on AWS. You'll also collaborate directly with senior stakeholders, turning complex problems into tested, working solutions. What You'll Do * Build and deploy backend services with Java & Spring Boot * Develop scalable APIs * Optimise SQL for large datasets * Work with DevOps on Docker and AWS deployments * Shape architecture and technical direction
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        FEATURED

        Cloud Security Engineer - Azure

        Apsley Recruitment Ltd
        City of London (EC2)
        From £500 to £550 per day
        Azure Security Engineer - Sentinel, Defender, Purview With at least five years' Azure Security experience, you will be responsible for implementing and maintaining robust security solutions across the Azure cloud infrastructure, and will have a key role in ensuring compliance, hardening environments, and leveraging Microsoft security tools to protect systems and data. Key Responsibilities * Implement and maintain secure Azure architectures in line with best practice * Develop and support cloud security policies and technical standards * Conduct security assessments, risk analysis, and contribute to security roadmaps * Collaborate with teams to integrate security into CI/CD and cloud-native applications * Configure and manage Microsoft Defender for Cloud, Defender for Endpoint, and Sentinel * Deploy Microsoft Purview for compliance and information protection
        Azure Security Engineer - Sentinel, Defender, Purview With at least five years' Azure Security experience, you will be responsible for implementing and maintaining robust security solutions across the Azure cloud infrastructure, and will have a key role in ensuring compliance, hardening environments, and leveraging Microsoft security tools to protect systems and data. Key Responsibilities * Implement and maintain secure Azure architectures in line with best practice * Develop and support cloud security policies and technical standards * Conduct security assessments, risk analysis, and contribute to security roadmaps * Collaborate with teams to integrate security into CI/CD and cloud-native applications * Configure and manage Microsoft Defender for Cloud, Defender for Endpoint, and Sentinel * Deploy Microsoft Purview for compliance and information protection
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        Front End Engineer

        InfinityQuest Ltd,
        Harmondsworth, West Drayton (UB7)
        Unspecified
        Required Skills & Experience * 10+ years in enterprise frontend engineering in AI/data environments. * Expertise in Tableau and/or PowerBI for rapid prototyping and stakeholder engagement * Deep hands-on experience with modern frontend frameworks (React, Typescript, etc) * Hands-on experience with cloud platforms (AWS preferred); familiarity with scalable deployment and integration * Strong knowledge of API integration. * Proven experience in developing, testing, and deploying robust frontend solutions into production environments, ensuring reliability, scalability, and maintainability beyond proof-of-concept or prototype stages. * Familiarity with airline or logistics data domains is a plus. * Significant experience in similar roles, with a proven ability to integrate quickly into new teams and deliver immediate value.
        Required Skills & Experience * 10+ years in enterprise frontend engineering in AI/data environments. * Expertise in Tableau and/or PowerBI for rapid prototyping and stakeholder engagement * Deep hands-on experience with modern frontend frameworks (React, Typescript, etc) * Hands-on experience with cloud platforms (AWS preferred); familiarity with scalable deployment and integration * Strong knowledge of API integration. * Proven experience in developing, testing, and deploying robust frontend solutions into production environments, ensuring reliability, scalability, and maintainability beyond proof-of-concept or prototype stages. * Familiarity with airline or logistics data domains is a plus. * Significant experience in similar roles, with a proven ability to integrate quickly into new teams and deliver immediate value.
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        Payment Architect

        Stackstudio Digital Ltd.
        Milton Keynes (MK1)
        Unspecified
        Job title- Payment Architect Location: Milton Keynes (2-3 days) Duration: 6 Months Job Description Santander UK is expanding its Payments Solution Architecture team. We are looking for senior level architects with deep experience in payments execution processing. These hires will support the modernisation of our payments estate and the migration of legacy platforms to the Payments Hub (PagoNxt). The individuals must have strong payments scheme knowledge, deep understanding of ISO 20022, and proven experience designing solutions for core payment processing. Payments domain expertise * Strong experience across payments execution processes such as orchestration, order management, clearing, settlement, reconciliations, exception handling and returns. * Practical scheme knowledge in at least several of the following: Bacs, Faster Payments, CHAPS, SWIFT, SEPA, cheques.
        Job title- Payment Architect Location: Milton Keynes (2-3 days) Duration: 6 Months Job Description Santander UK is expanding its Payments Solution Architecture team. We are looking for senior level architects with deep experience in payments execution processing. These hires will support the modernisation of our payments estate and the migration of legacy platforms to the Payments Hub (PagoNxt). The individuals must have strong payments scheme knowledge, deep understanding of ISO 20022, and proven experience designing solutions for core payment processing. Payments domain expertise * Strong experience across payments execution processes such as orchestration, order management, clearing, settlement, reconciliations, exception handling and returns. * Practical scheme knowledge in at least several of the following: Bacs, Faster Payments, CHAPS, SWIFT, SEPA, cheques.
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        A leading financial services client in London is seeking a talented AI Automation Engineer to join their team on a contract basis. Please see below for key details. Role Overview: Analyse and optimise business processes for automation whilst designing, building, and deploying intelligent automation solutions using BPA platforms (Appian), Machine Learning, and Generative AI to drive operational efficiency and innovation. 1. Process Analysis & Optimisation - Expert in analysing existing business processes through stakeholder interviews, process mapping, and workflow documentation to identify automation opportunities. Skilled in creating process flow diagrams, conducting time-motion studies, identifying bottlenecks and inefficiencies, and redesigning processes to be machine-readable and automation-ready using methodologies. 2.
        A leading financial services client in London is seeking a talented AI Automation Engineer to join their team on a contract basis. Please see below for key details. Role Overview: Analyse and optimise business processes for automation whilst designing, building, and deploying intelligent automation solutions using BPA platforms (Appian), Machine Learning, and Generative AI to drive operational efficiency and innovation. 1. Process Analysis & Optimisation - Expert in analysing existing business processes through stakeholder interviews, process mapping, and workflow documentation to identify automation opportunities. Skilled in creating process flow diagrams, conducting time-motion studies, identifying bottlenecks and inefficiencies, and redesigning processes to be machine-readable and automation-ready using methodologies. 2.
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        Senior Java Software Engineer (Urgent)

        Morson Edge
        Tower Hill, City of London (EC3), E1W 1WY
        £500 - 600 per day
        We are seeking an experienced Senior Java Software Engineer to join the IT team at a leading bank, supporting the delivery, maintenance, and enhancement of core systems across various business areas, including operations, compliance, transactions, and client management. This is a 6-month contract role offering an excellent day rate, ideally suited to candidates with experience in regulated environments, financial services, or government/public sector organisations. In this role, you will be an integral part of the software development lifecycle, working closely with Senior Java Developers, UI/UX teams, and Agile Transformation to architect, build, and deliver greenfield, brownfield, and integration applications.
        We are seeking an experienced Senior Java Software Engineer to join the IT team at a leading bank, supporting the delivery, maintenance, and enhancement of core systems across various business areas, including operations, compliance, transactions, and client management. This is a 6-month contract role offering an excellent day rate, ideally suited to candidates with experience in regulated environments, financial services, or government/public sector organisations. In this role, you will be an integral part of the software development lifecycle, working closely with Senior Java Developers, UI/UX teams, and Agile Transformation to architect, build, and deliver greenfield, brownfield, and integration applications.
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        Python Engineer

        Bloc Recruitment
        The City, City of London (EC4), EC2R
        £475 per day
        Up to £475 Per day inside IR35 Long term contract Remote UK/EU We’re looking for a BE Engineer to design and build high-quality backend systems and data pipelines that power the analytics platform. You’ll collaborate with engineers and the Product team across the full software lifecycle, leading on scalable services that ingest, transform and deliver data to our frontend applications and customers. You’ll bring strong Python skills, experience with microservices and data ingestion/ETL pipelines, and an eye for clean, maintainable code. Familiarity with AI-assisted dev tools (GitHub Copilot, Cursor, Windsurf, Devin) is a plus — we encourage using them to boost developer velocity and quality. What you’ll do * Design and implement robust, scalable backend services in Python * Own and improve data ingestion & processing pipelines
        Up to £475 Per day inside IR35 Long term contract Remote UK/EU We’re looking for a BE Engineer to design and build high-quality backend systems and data pipelines that power the analytics platform. You’ll collaborate with engineers and the Product team across the full software lifecycle, leading on scalable services that ingest, transform and deliver data to our frontend applications and customers. You’ll bring strong Python skills, experience with microservices and data ingestion/ETL pipelines, and an eye for clean, maintainable code. Familiarity with AI-assisted dev tools (GitHub Copilot, Cursor, Windsurf, Devin) is a plus — we encourage using them to boost developer velocity and quality. What you’ll do * Design and implement robust, scalable backend services in Python * Own and improve data ingestion & processing pipelines
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        Role - .Net Engineer Location - Hybrid, Home and twice a month onsite (multiple locations) Contract - Initial 3 months, high probability of extension to 2027 Rate - £475 to £525 per day Start - ASAP This role has been deemed Inside IR35. You must hold active SC Clearance to be eligible for this role. The Opportunity We are working in partnership with a leading defence systems integrator to recruit a .Net Engineer for a major long-term programme of work. This is an exciting opportunity to join a highly capable engineering team delivering innovative software solutions across complex and mission-critical environments. If you’re looking to broaden your technical exposure; particularly across modern data platforms and integration technologies—this role offers the chance to grow within a dynamic, fast-moving setting where no two challenges are the same. The Role
        Role - .Net Engineer Location - Hybrid, Home and twice a month onsite (multiple locations) Contract - Initial 3 months, high probability of extension to 2027 Rate - £475 to £525 per day Start - ASAP This role has been deemed Inside IR35. You must hold active SC Clearance to be eligible for this role. The Opportunity We are working in partnership with a leading defence systems integrator to recruit a .Net Engineer for a major long-term programme of work. This is an exciting opportunity to join a highly capable engineering team delivering innovative software solutions across complex and mission-critical environments. If you’re looking to broaden your technical exposure; particularly across modern data platforms and integration technologies—this role offers the chance to grow within a dynamic, fast-moving setting where no two challenges are the same. The Role
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        Software Engineer (Hardware Integration with .NET)

        IO Associates
        City of London (EC1)
        £600 - £800 per day + Outside IR35 and Hybrid
        Role: Staff Software Engineer Sector: Life Sciences Location: London Days Onsite: 3 per week Day Rate: £800 Outside IR35 Duration: 4 Months then to extend or go Permanent iO Associates have partnered with Life Science Manufacturing company on their search for a Staff Software Engineer who has a strong background in integrating Medical Devices. This role will give you the opportunity to make a real impact in Healthcare and Life Sciences. Essential Requirements * Strong .NET / C# background * Significant experience integrating and communicating with hardware devices * Ability to handle Windows devices, drivers, and communication layers * 8+ years of experience at a staff-level, capable of working autonomously * Not a web-focused developer; needs to be fully hardware-integration oriented Beneficial Experience * gRPC, REST APIs, HTTP * Integrating devices in Life Sciences
        Role: Staff Software Engineer Sector: Life Sciences Location: London Days Onsite: 3 per week Day Rate: £800 Outside IR35 Duration: 4 Months then to extend or go Permanent iO Associates have partnered with Life Science Manufacturing company on their search for a Staff Software Engineer who has a strong background in integrating Medical Devices. This role will give you the opportunity to make a real impact in Healthcare and Life Sciences. Essential Requirements * Strong .NET / C# background * Significant experience integrating and communicating with hardware devices * Ability to handle Windows devices, drivers, and communication layers * 8+ years of experience at a staff-level, capable of working autonomously * Not a web-focused developer; needs to be fully hardware-integration oriented Beneficial Experience * gRPC, REST APIs, HTTP * Integrating devices in Life Sciences
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        FEATURED

        AI/ML Principal Engineer

        Velocity Talent Ltd
        Central London (WC1)
        £400 per day £400 a day inside IR35
        Urgent 12-month Hybrid AI/Machine Learning (ML) engineer role paying £400 a day inside IR35 in central London with 2-3 days in the office a week. Start before Christmas, I need to send candidates today for this to be possible. Interviews next week apply asap/Today Build and optimize AI/ML pipelines for predictive modelling, NLP, and generative AI applications. Perform Exploratory Data Analysis (EDA), data mining, and visualization to extract insights. Design and implement Big Data solutions using Hadoop, Spark, PySpark, and Data Lake architectures. Develop and deploy ML models (supervised, unsupervised, tree-based, ensemble methods). Implement deep learning architectures (CNN, RNN, LSTM) using TensorFlow, PyTorch, and Keras. Work on NLP and Generative AI tasks including embeddings, transformers (BERT, GPT), and OpenAI APIs.
        Urgent 12-month Hybrid AI/Machine Learning (ML) engineer role paying £400 a day inside IR35 in central London with 2-3 days in the office a week. Start before Christmas, I need to send candidates today for this to be possible. Interviews next week apply asap/Today Build and optimize AI/ML pipelines for predictive modelling, NLP, and generative AI applications. Perform Exploratory Data Analysis (EDA), data mining, and visualization to extract insights. Design and implement Big Data solutions using Hadoop, Spark, PySpark, and Data Lake architectures. Develop and deploy ML models (supervised, unsupervised, tree-based, ensemble methods). Implement deep learning architectures (CNN, RNN, LSTM) using TensorFlow, PyTorch, and Keras. Work on NLP and Generative AI tasks including embeddings, transformers (BERT, GPT), and OpenAI APIs.
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        Data Engineer

        Canada Life Group (UK) Ltd (The)
        City of London (EC1), EC3V 9JU
        Competitive
        Canada Life UK looks after the retirement, investment and protection needs of individuals, families and companies. We help to build better futures for our customers, our intermediaries and our employees by operating as a modern, agile and welcoming organisation. Part of our parent company Great-West Lifeco, Canada Life UK has operated in the United Kingdom since 1903. We have hundreds of respected and supported employees committed to doing the right thing for our customers and colleagues. Canada Life UK is transforming to create a more customer-focused business by providing our customers with expertise on financial and tax planning, offering home finance and annuities propositions, and providing collective fund solutions to third party customers. Job Purpose
        Canada Life UK looks after the retirement, investment and protection needs of individuals, families and companies. We help to build better futures for our customers, our intermediaries and our employees by operating as a modern, agile and welcoming organisation. Part of our parent company Great-West Lifeco, Canada Life UK has operated in the United Kingdom since 1903. We have hundreds of respected and supported employees committed to doing the right thing for our customers and colleagues. Canada Life UK is transforming to create a more customer-focused business by providing our customers with expertise on financial and tax planning, offering home finance and annuities propositions, and providing collective fund solutions to third party customers. Job Purpose
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        PREMIUM

        C# Developer

        VIQU IT Recruitment
        The City, City of London (EC4), EC4M 7JH
        £300 - 400 per day
        A client is seeking an experienced C# Developer to join their development team and support a key internal initiative. In this role, you'll also play a major part in configuring, enhancing, and integrating Microsoft Dynamics 365 within the business. As a Software Developer, you’ll collaborate closely with senior stakeholders to deliver clean, efficient, and reliable code that underpins critical business applications. * Produce well-structured and clearly documented C# / .NET code. * Configure, customise, and maintain Microsoft Dynamics 365. * Build and support integrations across Dynamics 365 and other systems. * Develop plugins, workflows, and bespoke components within the Dynamics ecosystem. * Work seamlessly with cross-functional teams in a fully remote setting. * Take part in code reviews and contribute to help define best practices.
        A client is seeking an experienced C# Developer to join their development team and support a key internal initiative. In this role, you'll also play a major part in configuring, enhancing, and integrating Microsoft Dynamics 365 within the business. As a Software Developer, you’ll collaborate closely with senior stakeholders to deliver clean, efficient, and reliable code that underpins critical business applications. * Produce well-structured and clearly documented C# / .NET code. * Configure, customise, and maintain Microsoft Dynamics 365. * Build and support integrations across Dynamics 365 and other systems. * Develop plugins, workflows, and bespoke components within the Dynamics ecosystem. * Work seamlessly with cross-functional teams in a fully remote setting. * Take part in code reviews and contribute to help define best practices.
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        Role:Oracle Fusion Cloud Sr. Technical Integration Manager Location:London, UK Hybrid ( 23 days per week on-site) RoleType:3+months and extendable Salary:Depends on experience echnical expertise in Oracle Integration Cloud (OIC), Oracle Service Oriented Architecture (SOA), and Oracle Service Bus (OSB) * Knowledge of Oracle ERP, HCM, and EPM Cloud integrations will be highly desirable * Good/strong understanding of oracle fusion cloud implementation * Seven or more years of experience in integration development, with at least Five or more years demonstrated experience with OIC * Excellent communication and leadership skills * Strong problem-solving and analytical skills * Proven hands-on expertise designing and building integrations using OIC adapters, REST/SOAP APIs, XML, XSD, XSLT, and JSON, and file-based orchestrations
        Role:Oracle Fusion Cloud Sr. Technical Integration Manager Location:London, UK Hybrid ( 23 days per week on-site) RoleType:3+months and extendable Salary:Depends on experience echnical expertise in Oracle Integration Cloud (OIC), Oracle Service Oriented Architecture (SOA), and Oracle Service Bus (OSB) * Knowledge of Oracle ERP, HCM, and EPM Cloud integrations will be highly desirable * Good/strong understanding of oracle fusion cloud implementation * Seven or more years of experience in integration development, with at least Five or more years demonstrated experience with OIC * Excellent communication and leadership skills * Strong problem-solving and analytical skills * Proven hands-on expertise designing and building integrations using OIC adapters, REST/SOAP APIs, XML, XSD, XSLT, and JSON, and file-based orchestrations
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        Java Developer

        TEKsystems
        Central London, London
        400.00 - 550.00 GBP/Salary
        Description 1. Consumes existing messages from the AMP bus (AMPS is a product from 60East) containing Json messages. 2. Transforms and Routes messages to Dynatrace ingest endpoints. 3. Publishes metrics/dimensions via Dynatrace v2 APIs. 4. Enriches records with required Dynatrace metadata (e.g., dt.entity.host) to correctly bind data to hosts/entitiesmethod for building/maintaining the metadata mapping table to be agreed during design. Key Responsibilities * Design and implement the message consumer and router for Application to Dynatracetarget processor. * Publish metrics/dimensions to Dynatrace v2 APIs correctly and efficiently. * Create and manage metadata enrichment to bind data to hosts/entities (e.g., dt.entity.host). * Ensure security, reliability, and observability of the integration.
        Description 1. Consumes existing messages from the AMP bus (AMPS is a product from 60East) containing Json messages. 2. Transforms and Routes messages to Dynatrace ingest endpoints. 3. Publishes metrics/dimensions via Dynatrace v2 APIs. 4. Enriches records with required Dynatrace metadata (e.g., dt.entity.host) to correctly bind data to hosts/entitiesmethod for building/maintaining the metadata mapping table to be agreed during design. Key Responsibilities * Design and implement the message consumer and router for Application to Dynatracetarget processor. * Publish metrics/dimensions to Dynatrace v2 APIs correctly and efficiently. * Create and manage metadata enrichment to bind data to hosts/entities (e.g., dt.entity.host). * Ensure security, reliability, and observability of the integration.
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        PREMIUM

        Adobe AEM QA Automation

        Vallum Associates Limited
        City of London, London, EC2M 2QS
        £600 per day
        Job Title:Adobe AEM QA Automation Location: London- 3Days/week Onsite Duration: 6months+ Contract Inside IR35 We are seeking a highly skilled QA Automation Engineerwith proven expertise in Java-based test automationand deep working knowledge of the Adobe Experience Manager (AEM)platform. The ideal candidate will be instrumental in designing, building, and maintaining robust, scalable automation frameworks to ensure the quality, performance, and reliability of our digital customer experiences built on AEM. This role requires a strong focus on CI/CD integration and BDD/TDD principles within an Agile/Scrum environment. Key Responsibilities * AEM Test Strategy:Design and implement comprehensive Test Plansand Test Strategiesspecifically for AEM components, templates, workflows, and content authoring functionalities.
        Job Title:Adobe AEM QA Automation Location: London- 3Days/week Onsite Duration: 6months+ Contract Inside IR35 We are seeking a highly skilled QA Automation Engineerwith proven expertise in Java-based test automationand deep working knowledge of the Adobe Experience Manager (AEM)platform. The ideal candidate will be instrumental in designing, building, and maintaining robust, scalable automation frameworks to ensure the quality, performance, and reliability of our digital customer experiences built on AEM. This role requires a strong focus on CI/CD integration and BDD/TDD principles within an Agile/Scrum environment. Key Responsibilities * AEM Test Strategy:Design and implement comprehensive Test Plansand Test Strategiesspecifically for AEM components, templates, workflows, and content authoring functionalities.
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        Affinity Water is excited to be growing our Maximo Team, and we are looking for someone who is passionate, curious and ready to make an impact to join us as a Maximo Specialist on a 12 month fixed Term Contract. As a Maximo Specialist, you will be seen as one of the companys resident experts in how Maximo works. In conjunction with IT and business change teams you will be responsible for requirements definition, analysis, and design of Maximo enhancements, automation scripts and integrations. * ESRI GIS Mapping solution * Hi-Affinity CMS * Aurora Streetworks Management system * Waternet Leakage Monitoring system * Oracle Fusion Finance and Procurement system * FLS Visitour Scheduling There is an ambitious road map for the next few years which includes regulatory change, enhancements, small change, and an upgrade to MAS to name a few.
        Affinity Water is excited to be growing our Maximo Team, and we are looking for someone who is passionate, curious and ready to make an impact to join us as a Maximo Specialist on a 12 month fixed Term Contract. As a Maximo Specialist, you will be seen as one of the companys resident experts in how Maximo works. In conjunction with IT and business change teams you will be responsible for requirements definition, analysis, and design of Maximo enhancements, automation scripts and integrations. * ESRI GIS Mapping solution * Hi-Affinity CMS * Aurora Streetworks Management system * Waternet Leakage Monitoring system * Oracle Fusion Finance and Procurement system * FLS Visitour Scheduling There is an ambitious road map for the next few years which includes regulatory change, enhancements, small change, and an upgrade to MAS to name a few.
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        FEATURED
        Key Responsibilities AEM Development: Design, develop, and maintain AEM components, templates, workflows, and OSGi services using Java and the Sling framework. Front-End Integration: Collaborate with UX/UI teams to integrate front-end code (HTML, CSS, JavaScript/React/Angular) into AEM for a responsive user experience. System Integration: Integrate AEM with other core systems and Adobe Experience Cloud products (like Adobe Analytics, Adobe Target, and Adobe Campaign) using APIs (e.g., RESTful). Deployment and Support: Participate in the deployment process, conduct unit and system testing, and troubleshoot/debug issues in AEM environments. Best Practices: Ensure code quality, security, and performance by adhering to AEM and general software development best practices (e.g., in an Agile environment). AEM Sites Assets AEM Components AEM Core Development
        Key Responsibilities AEM Development: Design, develop, and maintain AEM components, templates, workflows, and OSGi services using Java and the Sling framework. Front-End Integration: Collaborate with UX/UI teams to integrate front-end code (HTML, CSS, JavaScript/React/Angular) into AEM for a responsive user experience. System Integration: Integrate AEM with other core systems and Adobe Experience Cloud products (like Adobe Analytics, Adobe Target, and Adobe Campaign) using APIs (e.g., RESTful). Deployment and Support: Participate in the deployment process, conduct unit and system testing, and troubleshoot/debug issues in AEM environments. Best Practices: Ensure code quality, security, and performance by adhering to AEM and general software development best practices (e.g., in an Agile environment). AEM Sites Assets AEM Components AEM Core Development
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        Oracle Consultant

        AVENSYS CONSULTING (UK) LTD
        Dunstable (LU5)
        From £70,000 to £75,000 per annum
        Job Title: Simphony Consultant Job Type: Fixed term contract for 6months Location: Dunstable, UK (Hybrid 2-3days/week) Salary: GBP 70-75K/Annum * Expertise on Oracle Simphony, API knowledge, Knowledge of Product Limitations * Ability to set up configuration * IT project experience * Business analysis skills * Testing Skills * Experience of Production Support * Any coding skill/ scripting skill is good to have * Roll out / Deploy experience.
        Job Title: Simphony Consultant Job Type: Fixed term contract for 6months Location: Dunstable, UK (Hybrid 2-3days/week) Salary: GBP 70-75K/Annum * Expertise on Oracle Simphony, API knowledge, Knowledge of Product Limitations * Ability to set up configuration * IT project experience * Business analysis skills * Testing Skills * Experience of Production Support * Any coding skill/ scripting skill is good to have * Roll out / Deploy experience.
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        12 months Remote £478 per day inside IR35 - Umbrella only Active SC security clearance required We are seeing a skilled DevOps engineer to design, implement and maintain the infrastructure, tools and processes that enable rapid development and high-quality software development. * Kafka * Java * docker * Spring (framework * boot, Data) * K8 * Helm * React * Typescript/JavaScript * Postgres * Open Search/ElasticSearch * Playwright * Wiremock * Grafana * Prometheus * Dynatrace * Git * NodeJS * Rest API All profiles will be reviewed against the required skills and experience. Due to the high number of applications we will only be able to respond to successful applicants in the first instance. We thank you for your interest and the time taken to apply!
        12 months Remote £478 per day inside IR35 - Umbrella only Active SC security clearance required We are seeing a skilled DevOps engineer to design, implement and maintain the infrastructure, tools and processes that enable rapid development and high-quality software development. * Kafka * Java * docker * Spring (framework * boot, Data) * K8 * Helm * React * Typescript/JavaScript * Postgres * Open Search/ElasticSearch * Playwright * Wiremock * Grafana * Prometheus * Dynatrace * Git * NodeJS * Rest API All profiles will be reviewed against the required skills and experience. Due to the high number of applications we will only be able to respond to successful applicants in the first instance. We thank you for your interest and the time taken to apply!
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        FEATURED
        Principal Technical Safety Consultants (CFD-FLACS) Background Risktec Solutions is an established, independent and specialist risk management consulting and training company, and is part of the TV Rheinland Group. We help clients to manage health, safety, security, environmental and business risk in sectors where the impact of loss is significant. Our people are high calibre professionals, with a strong focus on meeting clients expectations and we have offices across the UK and in the Netherlands, Dubai, Muscat, Houston and Calgary. Further information is available at * oil and gas (offshore and onshore) * carbon capture and storage * chemical manufacturing, handling and storage * hydrogen generation and distribution * onshore and offshore wind energy. Role Description
        Principal Technical Safety Consultants (CFD-FLACS) Background Risktec Solutions is an established, independent and specialist risk management consulting and training company, and is part of the TV Rheinland Group. We help clients to manage health, safety, security, environmental and business risk in sectors where the impact of loss is significant. Our people are high calibre professionals, with a strong focus on meeting clients expectations and we have offices across the UK and in the Netherlands, Dubai, Muscat, Houston and Calgary. Further information is available at * oil and gas (offshore and onshore) * carbon capture and storage * chemical manufacturing, handling and storage * hydrogen generation and distribution * onshore and offshore wind energy. Role Description
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        Full Stack Developer

        167 Solutions Ltd
        North West London (NW1)
        From £200 to £300 per annum
        Contract Full Stack Developer Duration: 4 Weeks Engagement: Fixed Price Project Location: Remote (UK-based preferred) About the Project We are looking for a strong Full Stack Developer to deliver a short-term project involving a static website build, API scraping, and structured JSON output. The ideal contractor will be able to take a clear brief, work autonomously, and deliver a high-quality, production-ready solution within four weeks. Key Responsibilities * Build a clean, fast static website using modern frameworks (Next.js, React, or equivalent) * Develop API scraping scripts to extract structured data reliably * Create, clean, and deliver JSON outputs for internal use * Implement basic automation and scheduling where needed * Ensure security, performance, and accuracy across all data workflows Technical Skills Required
        Contract Full Stack Developer Duration: 4 Weeks Engagement: Fixed Price Project Location: Remote (UK-based preferred) About the Project We are looking for a strong Full Stack Developer to deliver a short-term project involving a static website build, API scraping, and structured JSON output. The ideal contractor will be able to take a clear brief, work autonomously, and deliver a high-quality, production-ready solution within four weeks. Key Responsibilities * Build a clean, fast static website using modern frameworks (Next.js, React, or equivalent) * Develop API scraping scripts to extract structured data reliably * Create, clean, and deliver JSON outputs for internal use * Implement basic automation and scheduling where needed * Ensure security, performance, and accuracy across all data workflows Technical Skills Required
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        Salesforce Solution Architect

        167 Solutions Ltd
        North West London (NW10)
        From £600 to £750 per day
        Global Organisation | Remote UK with occasional travel 12 Month Contract | Outside IR35 | Immediate Start Day Rate: £600-£750 167 Solutions is partnering with a global enterprise seeking an experienced Salesforce Solution Architect to lead the design, governance and optimisation of their Salesforce estate. This is a strategic contract assignment with a focus on stabilising the platform, reducing legacy technical debt and improving data quality across Sales Cloud and Service Cloud. Role Overview You will define and own end to end Salesforce solutions, provide architectural assurance and embed strong governance across the organisation. A key part of the role is supporting the development of a Salesforce Centre of Excellence, while addressing legacy debt, data duplication and long term scalability. Key Responsibilities
        Global Organisation | Remote UK with occasional travel 12 Month Contract | Outside IR35 | Immediate Start Day Rate: £600-£750 167 Solutions is partnering with a global enterprise seeking an experienced Salesforce Solution Architect to lead the design, governance and optimisation of their Salesforce estate. This is a strategic contract assignment with a focus on stabilising the platform, reducing legacy technical debt and improving data quality across Sales Cloud and Service Cloud. Role Overview You will define and own end to end Salesforce solutions, provide architectural assurance and embed strong governance across the organisation. A key part of the role is supporting the development of a Salesforce Centre of Excellence, while addressing legacy debt, data duplication and long term scalability. Key Responsibilities
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        We are searching for one of our key clients for an Azure Cosmos DB Admin & Developer to drive the build-out of cloud-native, high-performance financial applications. This role sits at the sharp end of modern banking engineering, owning the design, optimisation, and operational excellence of Cosmos DB across mission-critical workloads. You will shape partitioning models, indexing strategies, consistency models, and performance tuning while building reusable frameworks in C#/.NET or Node.js. Expect close collaboration with architects and DevOps to embed Cosmos DB into microservices, backed by robust CI/CD through Azure DevOps. This position offers genuine impact in a regulated, high-velocity technology environment. Azure Cosmos DB (SQL/Mongo API), NoSQL modelling C#/.NET or Node.js Azure Functions, App Services, AKS, Logic Apps CI/CD with Azure DevOps
        We are searching for one of our key clients for an Azure Cosmos DB Admin & Developer to drive the build-out of cloud-native, high-performance financial applications. This role sits at the sharp end of modern banking engineering, owning the design, optimisation, and operational excellence of Cosmos DB across mission-critical workloads. You will shape partitioning models, indexing strategies, consistency models, and performance tuning while building reusable frameworks in C#/.NET or Node.js. Expect close collaboration with architects and DevOps to embed Cosmos DB into microservices, backed by robust CI/CD through Azure DevOps. This position offers genuine impact in a regulated, high-velocity technology environment. Azure Cosmos DB (SQL/Mongo API), NoSQL modelling C#/.NET or Node.js Azure Functions, App Services, AKS, Logic Apps CI/CD with Azure DevOps
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        What is the average salary for API in Hertfordshire?

        Average salary per year
        £62,499

        The average salary for a API in Hertfordshire is £62,499. API in Hertfordshire salaries range from £47,499 to £67,499.

        Frequently Asked Questions

        How many part time API jobs are there in Hertfordshire?
        There are 60 part time API jobs within 20 miles of Hertfordshire available on Jobsite right now.

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