Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations

Filters

Contract
Sort byRelevance
Commute time
Locations
Salaries
Date posted
    Type of Company
      Job types
      1 selected

        Related Jobs

        • IT
        • Software Development
        • Architecture
        • Infrastructure
        • Design
        • Practicality
        • Communication
        • Engineering
        • Service
        • Senior Software Engineer
        • Solution Architect
        • Senior Full Stack Engineer
        • Software Engineer
        • Full Stack Engineer
        • AI Architect

        show more
        Contract
        Remove all filters

        Commute time

        Locations

        Popular locations


        The City, City (EC3)
        3


































        See all jobs in Hertfordshire

        Salaries

        Date posted





        Job types

        Contract
        471



        62 Contract API jobs in Hertfordshire + 20 miles

        Workplace Platform Engineer (DocuSign & 365 & API)

        Morson Edge
        City of London, London, EC1A 1AA
        Market related
        We are seeking a Platform Engineer to join the Modern Workplace team at a leading banking client. This team is focused on delivering a flexible, efficient, and seamless digital workplace experience, enabling colleagues to collaborate and perform effectively using enterprise tools such as Microsoft 365 and DocuSign. The successful candidate will be a key contributor to the Productivity Applications portfolio, responsible for configuring, maintaining, and enhancing platforms that support a high-performing digital workplace. Key Responsibilities * Configure, develop, and maintain solutions across the Productivity Applications platform * Contribute to the design and implementation of new digital workplace capabilities * Manage the end-to-end lifecycle of platform solutions, ensuring continuous improvement * Support business-as-usual changes and incremental enhancements
        We are seeking a Platform Engineer to join the Modern Workplace team at a leading banking client. This team is focused on delivering a flexible, efficient, and seamless digital workplace experience, enabling colleagues to collaborate and perform effectively using enterprise tools such as Microsoft 365 and DocuSign. The successful candidate will be a key contributor to the Productivity Applications portfolio, responsible for configuring, maintaining, and enhancing platforms that support a high-performing digital workplace. Key Responsibilities * Configure, develop, and maintain solutions across the Productivity Applications platform * Contribute to the design and implementation of new digital workplace capabilities * Manage the end-to-end lifecycle of platform solutions, ensuring continuous improvement * Support business-as-usual changes and incremental enhancements
        more
        PREMIUM

        Automation Engineer – Storage & Platform (Python / CI/CD / APIs)

        Essential Consulting
        South East London (SE1)
        Unspecified Competitive Daily Rate - Inside IR35
        Engineering API integrations between systems (REST APIs, authentication, error handling, retries, idempotency) * Hands-on experience with API integration and automation
        Engineering API integrations between systems (REST APIs, authentication, error handling, retries, idempotency) * Hands-on experience with API integration and automation
        more

        ServiceNow Solution Architect

        FryerMiles Recruitment
        Fenny Lock, Milton Keynes (MK1), MK1 1AS
        £475 - 500 per day
        Proficiency in JavaScript and REST/SOAP API integrations
        Proficiency in JavaScript and REST/SOAP API integrations
        NEW
        We’re looking for a proactive, self-sufficient developer with strong experience in .NET, API development, microservices architecture, and database integration.
        We’re looking for a proactive, self-sufficient developer with strong experience in .NET, API development, microservices architecture, and database integration.
        more
        FEATURED
        Good understanding of API-led, integration-centric architectures and data-flow modelling * Experience with API gateways, middleware, or enterprise integration platforms
        Good understanding of API-led, integration-centric architectures and data-flow modelling * Experience with API gateways, middleware, or enterprise integration platforms
        more
        PREMIUM
        Work with .NET (C#), Azure Integration Services (Logic Apps, API Management, Service Bus, Event Grid), and containerised microservices (Docker, AKS). * Champion best practices for API-led connectivity, event-driven architectures, and pub/sub messaging patterns. * Understanding of integration patterns (pub/sub, API-led, event-driven) and security standards (OAuth2, JWT, TLS, API security).
        Work with .NET (C#), Azure Integration Services (Logic Apps, API Management, Service Bus, Event Grid), and containerised microservices (Docker, AKS). * Champion best practices for API-led connectivity, event-driven architectures, and pub/sub messaging patterns. * Understanding of integration patterns (pub/sub, API-led, event-driven) and security standards (OAuth2, JWT, TLS, API security).
        more
        Strategic Bid Architect / Pre Sales Solution Architect / Bid Solution Architect / Bid Architect - Solutions - This is a pivotal role in shaping, validating, and presenting complex digital, data, and AI-enabled solutions that are commercially competitive, architecturally robust, and operationally deliverable. Acting as the senior solution leader, the role is accountable for designing and governing advanced, cloud-native, and data-driven architectures for strategic, complex, and high-value bids, showcasing our clients digital design ethos and technical excellence. They ensure that all proposals are aligned to customer outcomes, compliant with requirements, and consistent with enterprise standards and delivery capability - delivering winning, sustainable propositions for our client. Working closely with the Growth and Business Development teams from the earliest stages of the ...
        Strategic Bid Architect / Pre Sales Solution Architect / Bid Solution Architect / Bid Architect - Solutions - This is a pivotal role in shaping, validating, and presenting complex digital, data, and AI-enabled solutions that are commercially competitive, architecturally robust, and operationally deliverable. Acting as the senior solution leader, the role is accountable for designing and governing advanced, cloud-native, and data-driven architectures for strategic, complex, and high-value bids, showcasing our clients digital design ethos and technical excellence. They ensure that all proposals are aligned to customer outcomes, compliant with requirements, and consistent with enterprise standards and delivery capability - delivering winning, sustainable propositions for our client. Working closely with the Growth and Business Development teams from the earliest stages of the ...
        more
        FEATURED
        Essential Skills - Solution Architecture and Design Significant experience as a Solution Architect, ideally within complex financial services environments Domain knowledge in o Retail Banking products - e.g. - Unsecured loans Personal Accounts banking & savings and Bonds (fixed term deposits) o Business Segmentation Retail, business banking, private o * Onboarding processes for Personal account o Core Banking products (customers, accounts, pricing, transactions, etc) and related services essential to the operations of a bank Domain driven design, with working knowledge of the BIAN framework, TOGAF, ArchiMate * Proven experience in defining & documenting As-Is & Target Architecture, working with stakeholders to help define & deliver strategic objectives & roadmaps, being embedded into the functional domain, balancing business requirements with functional & technical
        Essential Skills - Solution Architecture and Design Significant experience as a Solution Architect, ideally within complex financial services environments Domain knowledge in o Retail Banking products - e.g. - Unsecured loans Personal Accounts banking & savings and Bonds (fixed term deposits) o Business Segmentation Retail, business banking, private o * Onboarding processes for Personal account o Core Banking products (customers, accounts, pricing, transactions, etc) and related services essential to the operations of a bank Domain driven design, with working knowledge of the BIAN framework, TOGAF, ArchiMate * Proven experience in defining & documenting As-Is & Target Architecture, working with stakeholders to help define & deliver strategic objectives & roadmaps, being embedded into the functional domain, balancing business requirements with functional & technical
        more

        Backend Developer - Java

        Infoplus Technologies UK Ltd
        The City, City of London (EC3), EC4R 9AA
        Unspecified
        Role: Backend Developer - Java - Location: Edinburgh / London, UK - Duration: Contract - Your Profile * 510 years of overall software development experience, with minimum 4+ years of hands on Java development * Strong experience with Java 9+ * Proven expertise in Spring Framework (Spring Boot, Spring MVC, Spring Core) * Hands on experience building backend services and APIs and Microservices * Solid understanding of object oriented design, design patterns, and clean code principles * Experience working in Agile / Scrum environments * Strong problem solving and debugging skills * Ability to work effectively in distributed, multi team environments * Experience with SaaS based architectures * Exposure to event driven architecture (Kafka, JMS, or equivalent) * Experience with system integration and enterprise messaging * Knowledge of cloud platforms (GCP preferred)
        Role: Backend Developer - Java - Location: Edinburgh / London, UK - Duration: Contract - Your Profile * 510 years of overall software development experience, with minimum 4+ years of hands on Java development * Strong experience with Java 9+ * Proven expertise in Spring Framework (Spring Boot, Spring MVC, Spring Core) * Hands on experience building backend services and APIs and Microservices * Solid understanding of object oriented design, design patterns, and clean code principles * Experience working in Agile / Scrum environments * Strong problem solving and debugging skills * Ability to work effectively in distributed, multi team environments * Experience with SaaS based architectures * Exposure to event driven architecture (Kafka, JMS, or equivalent) * Experience with system integration and enterprise messaging * Knowledge of cloud platforms (GCP preferred)
        more
        A global consultancy operating in mobile telecoms and satellite is looking for an Enterprise Architect to lead service and operational transformation across their client programmes. You will own the architectural vision for operational support and service assurance, working closely with client product, engineering and commercial teams to drive measurable improvements in service quality, platform resilience and partner ecosystem integration. * Defining and owning target-state architecture for OSS and service assurance platforms across satellite and terrestrial networks * Designing service assurance frameworks covering fault management, performance monitoring, SLA management, and root cause analysis * Leading the architectural roadmap for satellite and mobile, focused on interoperability and ecosystem enablement
        A global consultancy operating in mobile telecoms and satellite is looking for an Enterprise Architect to lead service and operational transformation across their client programmes. You will own the architectural vision for operational support and service assurance, working closely with client product, engineering and commercial teams to drive measurable improvements in service quality, platform resilience and partner ecosystem integration. * Defining and owning target-state architecture for OSS and service assurance platforms across satellite and terrestrial networks * Designing service assurance frameworks covering fault management, performance monitoring, SLA management, and root cause analysis * Leading the architectural roadmap for satellite and mobile, focused on interoperability and ecosystem enablement
        more

        Enterprise Architect – Corporate Technology

        Ventula Consulting Limited
        South West London (SW1)
        From £850 to £900 per day
        One of the worlds great FMCGs (FTSE 100) requires an Enterprise Architect in its Corporate Tech function. This role is anchored in Enterprise Architecture and is focused on building and maturing EA capability in an evolving Corporate Functions environment. It combines strong architectural judgement with the ability to partner, influence, and drive pragmatic, outcome-led change in a landscape with emerging maturity and legacy complexity. As an Enterprise Architect with deep expertise in Finance and Corporate Technologies, you will bridge the gap between enterprise technology and key business objectives across corporate functions. You will design and govern architectures that enable enterprise-wide transformation, ensuring alignment with CFO, CHRO, CPO, and General Counsel priorities. Your domain knowledge will drive the evolution of systems for core Finance, HR, Legal, and ...
        One of the worlds great FMCGs (FTSE 100) requires an Enterprise Architect in its Corporate Tech function. This role is anchored in Enterprise Architecture and is focused on building and maturing EA capability in an evolving Corporate Functions environment. It combines strong architectural judgement with the ability to partner, influence, and drive pragmatic, outcome-led change in a landscape with emerging maturity and legacy complexity. As an Enterprise Architect with deep expertise in Finance and Corporate Technologies, you will bridge the gap between enterprise technology and key business objectives across corporate functions. You will design and govern architectures that enable enterprise-wide transformation, ensuring alignment with CFO, CHRO, CPO, and General Counsel priorities. Your domain knowledge will drive the evolution of systems for core Finance, HR, Legal, and ...
        more

        Contract BI Developer

        Hanson Lee Resourcing Ltd
        City of London (EC2)
        Up to £550 per day
        Were working closely with a London Market Insurance Syndicate to hire an experienced Contract Data Engineer to support the ongoing development and enhancement of its core data environment. This is a hands-on role focused on building and optimising the data platform, data warehouse and wider data ecosystem, helping to improve data quality, accessibility and reporting capability across the Syndicate. This opportunity would suit someone with strong Lloyds / London Market experience and a solid background in Azure-based data engineering. What youll be doing * Build, enhance and support the data ecosystem, including the Syndicate Data Hub * Develop and maintain ETL / ELT pipelines for ingesting, transforming and delivering data * Support the design and evolution of the data model, with a focus on Syndicate-specific requirements
        Were working closely with a London Market Insurance Syndicate to hire an experienced Contract Data Engineer to support the ongoing development and enhancement of its core data environment. This is a hands-on role focused on building and optimising the data platform, data warehouse and wider data ecosystem, helping to improve data quality, accessibility and reporting capability across the Syndicate. This opportunity would suit someone with strong Lloyds / London Market experience and a solid background in Azure-based data engineering. What youll be doing * Build, enhance and support the data ecosystem, including the Syndicate Data Hub * Develop and maintain ETL / ELT pipelines for ingesting, transforming and delivering data * Support the design and evolution of the data model, with a focus on Syndicate-specific requirements
        more

        Dev Ops SME?

        Randstad Digital
        City of London (EC1)
        £400 - £600 per day
        Senior AWS DevOps Engineer (Test & Infrastructure Resilience) Location: Remote Working - Security Clearance: Must be eligible for SC Clearance - 6 Months Contract £400 to £600 a day inside IR35 - A top-tier consultancy firm is looking for an experienced AWS DevOps Engineer with a strong background in testing to help maintain and evolve Critical National Infrastructure (CNI) for a top UK client. This is a pivotal role in maintaining critical national infrastructure where scalability and resilience are essential. We're looking for a highly skilled DevOps engineer with a strong background in testing (including APIs). The ideal candidate should be self-motivated and results-driven, capable of thriving in an Agile team. You'll need to be comfortable with Confluence for documentation and Jira for project tracking and story management.
        Senior AWS DevOps Engineer (Test & Infrastructure Resilience) Location: Remote Working - Security Clearance: Must be eligible for SC Clearance - 6 Months Contract £400 to £600 a day inside IR35 - A top-tier consultancy firm is looking for an experienced AWS DevOps Engineer with a strong background in testing to help maintain and evolve Critical National Infrastructure (CNI) for a top UK client. This is a pivotal role in maintaining critical national infrastructure where scalability and resilience are essential. We're looking for a highly skilled DevOps engineer with a strong background in testing (including APIs). The ideal candidate should be self-motivated and results-driven, capable of thriving in an Agile team. You'll need to be comfortable with Confluence for documentation and Jira for project tracking and story management.
        more
        FEATURED

        Java Backend Engineer

        Interact Consulting Limited
        Milton Keynes (MK9)
        500-550 a day
        We're looking for a skilled Java Backend Engineer with strong experience in Spring and microservices to join our growing team. It is a UK based, fully remote, outside IR35, initial 6-month contract. * Build and maintain scalable microservices. * Develop REST APIs using Java & Spring. * Collaborate with cross-functional teams. * Write clean, efficient, and testable code. * Strong Java (8+) and Spring experience. * Solid background in microservices architecture. * Experience with REST APIs, Docker, and CI/CD. * Knowledge of databases (SQL). * Knowledge of Azure. Apply now to join a fast-moving, collaborative team.
        We're looking for a skilled Java Backend Engineer with strong experience in Spring and microservices to join our growing team. It is a UK based, fully remote, outside IR35, initial 6-month contract. * Build and maintain scalable microservices. * Develop REST APIs using Java & Spring. * Collaborate with cross-functional teams. * Write clean, efficient, and testable code. * Strong Java (8+) and Spring experience. * Solid background in microservices architecture. * Experience with REST APIs, Docker, and CI/CD. * Knowledge of databases (SQL). * Knowledge of Azure. Apply now to join a fast-moving, collaborative team.
        more

        Full Stack Developer

        Hays
        Milton Keynes (MK1)
        £350.0 - £400.0 per annum + £350 - £400 per day
        Your new role - We are looking for an experienced Full Stack C# Web Developer with strong React expertise to support the development and enhancement of a web-based compliance portal for a key programme. Responsibilities * Design, develop, and maintain a secure, scalable compliance web portal * Build and enhance back-end services using C# and .NET / .NET Core * Develop modern, responsive front-end applications using React * Integrate front-end components with RESTful APIs * Work closely with product owners, business analysts, and QA engineers * Ensure high standards of security, performance, and maintainability * Contribute to code reviews, documentation, and technical standards - What you'll need to succeed * Proven experience as a Full Stack Developer * Strong C# and .NET / .NET Core development background * Commercial experience building applications with React
        Your new role - We are looking for an experienced Full Stack C# Web Developer with strong React expertise to support the development and enhancement of a web-based compliance portal for a key programme. Responsibilities * Design, develop, and maintain a secure, scalable compliance web portal * Build and enhance back-end services using C# and .NET / .NET Core * Develop modern, responsive front-end applications using React * Integrate front-end components with RESTful APIs * Work closely with product owners, business analysts, and QA engineers * Ensure high standards of security, performance, and maintainability * Contribute to code reviews, documentation, and technical standards - What you'll need to succeed * Proven experience as a Full Stack Developer * Strong C# and .NET / .NET Core development background * Commercial experience building applications with React
        more

        Python Developer--SC Cleared

        Morson Edge
        Granby Industrial Estate, Milton Keynes (MK1), MK1 1AX
        £500 - 550 per day
        Python Develoepr, ideally with current SC Security Clearance, is needed to work with our central government full time on site in Milton Keynes. The Python Developer will be responsible for designing, developing, testing, and maintaining high-quality software solutions using Python. Delivering scalable, efficient, and maintainable code while collaborating with cross-functional teams to meet business and technical requirements. • Strong hands-on experience in Python with substantial experience of building production-grade applications. • Current SC Security Clearance or eligibility for SC Clearance • Experience in Golang including developing scalable backend services • Experience in C# / .NET including building enterprise-grade applications • Experience of designing, developing, and maintaining microservices-based architectures
        Python Develoepr, ideally with current SC Security Clearance, is needed to work with our central government full time on site in Milton Keynes. The Python Developer will be responsible for designing, developing, testing, and maintaining high-quality software solutions using Python. Delivering scalable, efficient, and maintainable code while collaborating with cross-functional teams to meet business and technical requirements. • Strong hands-on experience in Python with substantial experience of building production-grade applications. • Current SC Security Clearance or eligibility for SC Clearance • Experience in Golang including developing scalable backend services • Experience in C# / .NET including building enterprise-grade applications • Experience of designing, developing, and maintaining microservices-based architectures
        more
        PREMIUM
        Remote UK - Duration: 6 months (initially) Inside IR35 - Umbrella only - Our client, a reputable organisation, is hiring for two ServiceNow IRM Specialists to join a dynamic project. This is a fantastic opportunity to work remotely within the UK on a key initiative to optimise enterprise risk management and compliance processes. * Lead the design, configuration, and implementation of ServiceNow Integrated Risk Management (IRM) modules. * Collaborate with stakeholders to enhance governance, streamline workflows, and improve compliance maturity. * Manage ongoing optimisation of the platform, ensuring it effectively supports risk registers, control frameworks, policy lifecycle management, and automation. * Act as a subject matter expert on risk-related ServiceNow modules, providing guidance and best practices.
        Remote UK - Duration: 6 months (initially) Inside IR35 - Umbrella only - Our client, a reputable organisation, is hiring for two ServiceNow IRM Specialists to join a dynamic project. This is a fantastic opportunity to work remotely within the UK on a key initiative to optimise enterprise risk management and compliance processes. * Lead the design, configuration, and implementation of ServiceNow Integrated Risk Management (IRM) modules. * Collaborate with stakeholders to enhance governance, streamline workflows, and improve compliance maturity. * Manage ongoing optimisation of the platform, ensuring it effectively supports risk registers, control frameworks, policy lifecycle management, and automation. * Act as a subject matter expert on risk-related ServiceNow modules, providing guidance and best practices.
        more
        FEATURED

        Related Jobs


        show more

        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 contract API jobs are there in Hertfordshire?
        There are 62 contract API jobs within 20 miles of Hertfordshire available on CWJobs right now.

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