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        84 Permanent API jobs in Hayes End + 20 miles

        Senior Software Engineer

        Espire Infolabs Limited
        EC3R, City of London
        Unspecified
        Espire Infolabs is hiring for Front End Developer(React.js) for London, UK location. Role :Front End Developer(React.js) Location: London, UK(3 Days/Week onsite) Desired Industry Experience:5+ years - Relevant Experience:React. Js, Typescript, Azure - Proven experience as a Front-End Developer with a focus on React.js, and Typescript. Familiarity with C# and .Net. Strong proficiency in JavaScript, ES6/ES7, and related front-end technologies. Familiarity with state management libraries such as Redux. Experience with version control systems, such as Git. Experience with the Web Content Accessibility Guidelines. Knowledge of responsive web design principles and CSS frameworks. Understanding of RESTful APIs and asynchronous data retrieval. Experience with unit testing. Strong problem-solving and debugging skills. Excellent teamwork and communication skills.
        Espire Infolabs is hiring for Front End Developer(React.js) for London, UK location. Role :Front End Developer(React.js) Location: London, UK(3 Days/Week onsite) Desired Industry Experience:5+ years - Relevant Experience:React. Js, Typescript, Azure - Proven experience as a Front-End Developer with a focus on React.js, and Typescript. Familiarity with C# and .Net. Strong proficiency in JavaScript, ES6/ES7, and related front-end technologies. Familiarity with state management libraries such as Redux. Experience with version control systems, such as Git. Experience with the Web Content Accessibility Guidelines. Knowledge of responsive web design principles and CSS frameworks. Understanding of RESTful APIs and asynchronous data retrieval. Experience with unit testing. Strong problem-solving and debugging skills. Excellent teamwork and communication skills.
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        NEWFEATURED

        Senior Backend Software Engineer (Python)

        Plexus Resource Solutions Ltd
        EC1A, City of London
        From £90,000 to £120,000 per annum
        Web3 - London, England £90-£120K - Plexus are working with a company that are building the future of gaming by introducing equitable ownership and compensation models powered by blockchain. Through our suite of Web3 games and DAO-driven products, we create opportunities for players worldwide to share in the value they help create. As a Senior Backend Engineer, youll play a key role in shaping the infrastructure behind Web3 products. From crafting Python-based APIs to building seamless blockchain integrations, youll help power a platform that brings decentralized ownership to the next generation of gaming - Responsibilities * Architect and develop backend systems to power Web3 applications * Build and deploy RESTful APIs using Python * Connect backend services with Web3 protocols, blockchains, DAOs, and smart contracts - What we're looking for
        Web3 - London, England £90-£120K - Plexus are working with a company that are building the future of gaming by introducing equitable ownership and compensation models powered by blockchain. Through our suite of Web3 games and DAO-driven products, we create opportunities for players worldwide to share in the value they help create. As a Senior Backend Engineer, youll play a key role in shaping the infrastructure behind Web3 products. From crafting Python-based APIs to building seamless blockchain integrations, youll help power a platform that brings decentralized ownership to the next generation of gaming - Responsibilities * Architect and develop backend systems to power Web3 applications * Build and deploy RESTful APIs using Python * Connect backend services with Web3 protocols, blockchains, DAOs, and smart contracts - What we're looking for
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        NEW

        Backend Engineer Python

        Plexus Resource Solutions Ltd
        EC1, City of London
        From £90,000 to £120,000 per annum
        Backend Engineer - On-Chain Social Network - Remote £90k £120k - Plexus are working with an on-chain social network that empowers people to express themselves, connect with others, and explore the value of imagination. To support our growth and deliver a world-class experience, were looking for a Backend Engineer to join our core product team. Responsibilities * Work closely with the team to design, build, and deliver new product features * Develop and maintain the APIs that power our platform * Contribute to system reliability by taking part in our on-call rotation - Requirements * Solid experience with Python, GraphQL, and MongoDB * Flexibility to move across the stack when needed * Hands-on experience in blockchain development * Strong product intuition with a focus on user experience - Benefits * Competitive salary * Top-quality medical, dental & vision insurance
        Backend Engineer - On-Chain Social Network - Remote £90k £120k - Plexus are working with an on-chain social network that empowers people to express themselves, connect with others, and explore the value of imagination. To support our growth and deliver a world-class experience, were looking for a Backend Engineer to join our core product team. Responsibilities * Work closely with the team to design, build, and deliver new product features * Develop and maintain the APIs that power our platform * Contribute to system reliability by taking part in our on-call rotation - Requirements * Solid experience with Python, GraphQL, and MongoDB * Flexibility to move across the stack when needed * Hands-on experience in blockchain development * Strong product intuition with a focus on user experience - Benefits * Competitive salary * Top-quality medical, dental & vision insurance
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        NEW
        ABAP Developer ? AI / Startup Role?? Most ABAP roles keep you maintaining the same old codebase. This one lets you take your SAP expertise and plug it straight into a modern AI platform that's transforming how global enterprises run their tech. This London startup is tackling a multi-billion-dollar problem: helping the world's biggest companies turn ERP chaos into clarity. Their AI engine saves millions in IT costs, accelerates project timelines by months, and modernises decades-old systems in ways that have never been done before. This is a role for those who live and breathe tech. Hours run 9am-7pm, and the expectation is clear: hard work and full commitment are what make the difference here. What you'll do * Write and optimise ABAP while shaping how AI agents interpret SAP. * Go beyond SAP, contribute to backend services, APIs, and infrastructure.
        ABAP Developer ? AI / Startup Role?? Most ABAP roles keep you maintaining the same old codebase. This one lets you take your SAP expertise and plug it straight into a modern AI platform that's transforming how global enterprises run their tech. This London startup is tackling a multi-billion-dollar problem: helping the world's biggest companies turn ERP chaos into clarity. Their AI engine saves millions in IT costs, accelerates project timelines by months, and modernises decades-old systems in ways that have never been done before. This is a role for those who live and breathe tech. Hours run 9am-7pm, and the expectation is clear: hard work and full commitment are what make the difference here. What you'll do * Write and optimise ABAP while shaping how AI agents interpret SAP. * Go beyond SAP, contribute to backend services, APIs, and infrastructure.
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        NEWFEATURED
        Title: Laboratory Systems Specialist - Location: Slough - Visa and Relocation support is offered with this role. Today, Lonza is a global leader in life sciences operating across five continents. While we work in science, theres no magic formula to how we do it. Our greatest scientific solution is talented people working together, devising ideas that help businesses to help people. In exchange, we let our people own their careers. Their ideas, big and small, genuinely improve the world. And thats the kind of work we want to be part of. The role of a Laboratory Systems Specialist is to lead the development and implementation of robust Lab/digital infrastructure within our R&D laboratories for the UK and US locations. This is pivotal in enabling efficient, automated data exchange between laboratory instruments and enterprise informatics systems such as Electronic Lab no
        Title: Laboratory Systems Specialist - Location: Slough - Visa and Relocation support is offered with this role. Today, Lonza is a global leader in life sciences operating across five continents. While we work in science, theres no magic formula to how we do it. Our greatest scientific solution is talented people working together, devising ideas that help businesses to help people. In exchange, we let our people own their careers. Their ideas, big and small, genuinely improve the world. And thats the kind of work we want to be part of. The role of a Laboratory Systems Specialist is to lead the development and implementation of robust Lab/digital infrastructure within our R&D laboratories for the UK and US locations. This is pivotal in enabling efficient, automated data exchange between laboratory instruments and enterprise informatics systems such as Electronic Lab no
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        NEW

        Software Engineer

        Inspire People
        CR2, South Croydon
        £41100 - £44400 per annum + 29% pension + Civil Service benefits
        HM Land Registry (HMLR) are modernising the systems and services that underpin property ownership across England and Wales - some of the most valuable data in the UK economy. As a Software Developer, you'll play an important role in designing, building and supporting the digital services that help secure property rights and enable the housing market to function. Salary up to £44,400, 29% employer pension contribution plus full Civil Service benefits. Flexible, hybrid working from 14 office locations across the UK. Job Summary - You will join HMLR's Software Development Practice, part of the wider Digital, Data and Technology (DDaT) directorate. The practice includes Developers who work in multidisciplinary agile teams with product managers, delivery managers, testers, business analysts and user researchers.
        HM Land Registry (HMLR) are modernising the systems and services that underpin property ownership across England and Wales - some of the most valuable data in the UK economy. As a Software Developer, you'll play an important role in designing, building and supporting the digital services that help secure property rights and enable the housing market to function. Salary up to £44,400, 29% employer pension contribution plus full Civil Service benefits. Flexible, hybrid working from 14 office locations across the UK. Job Summary - You will join HMLR's Software Development Practice, part of the wider Digital, Data and Technology (DDaT) directorate. The practice includes Developers who work in multidisciplinary agile teams with product managers, delivery managers, testers, business analysts and user researchers.
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        Senior Software Developer - Ruby

        SUMMER-BROWNING ASSOCIATES LIMITED
        E1, East London
        £600 - £650 per day + competitive
        Summer-Browning Associates are currently supporting our Central Government client who are seeking a Senior Software Engineer who is highly proficient with Ruby programming on an initial 12 month contract (London or Manchester - hybrid) * Work within a multi-disciplinary product team and lead the design, development, and maintenance of robust, scalable open data services and APIs * Provide strategic technical leadership by setting software architecture, engineering practices, and technical direction across the Team * Define and evolve scalable, secure design patterns and coding standards, ensuring alignment with standards and cross-government platforms * Collaborate with teams to select technologies, shape roadmaps, and deliver resilient, maintainable digital services that meet programme goals * Represent the department at technical forums, open-source communities, and
        Summer-Browning Associates are currently supporting our Central Government client who are seeking a Senior Software Engineer who is highly proficient with Ruby programming on an initial 12 month contract (London or Manchester - hybrid) * Work within a multi-disciplinary product team and lead the design, development, and maintenance of robust, scalable open data services and APIs * Provide strategic technical leadership by setting software architecture, engineering practices, and technical direction across the Team * Define and evolve scalable, secure design patterns and coding standards, ensuring alignment with standards and cross-government platforms * Collaborate with teams to select technologies, shape roadmaps, and deliver resilient, maintainable digital services that meet programme goals * Represent the department at technical forums, open-source communities, and
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        Enterprise Solution Architect - London Insurance Markets

        Sanderson Recruitment
        EC1, City of London
        £485 - £950 per day + Umbrella Engagement
        Senior Solution Architect / Enterprise Solutuion Architect - Our client operate within the London Market insurance industry, recognised for its innovation, scale, and commitment to digital transformation. The organisation is undertaking a multi-year technology modernisation initiative aimed at enhancing core underwriting, claims, and broking platforms - and this role plays a pivotal part in shaping that future. The Opportunity - We've had a brilliant brief for a Senior Solution / Enterprise Architect to join a well-known brand within the London Market. You'll work closely with the Head of Architecture and a talented team of Enterprise and Senior Solution Architects to help define and evolve the organisation's strategic technology roadmap. This is a software and application-focused role, ideal for someone who brings deep London Market insurance domain expertise and a s
        Senior Solution Architect / Enterprise Solutuion Architect - Our client operate within the London Market insurance industry, recognised for its innovation, scale, and commitment to digital transformation. The organisation is undertaking a multi-year technology modernisation initiative aimed at enhancing core underwriting, claims, and broking platforms - and this role plays a pivotal part in shaping that future. The Opportunity - We've had a brilliant brief for a Senior Solution / Enterprise Architect to join a well-known brand within the London Market. You'll work closely with the Head of Architecture and a talented team of Enterprise and Senior Solution Architects to help define and evolve the organisation's strategic technology roadmap. This is a software and application-focused role, ideal for someone who brings deep London Market insurance domain expertise and a s
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        FEATURED

        Data Storage Engineer

        Deerfoot Recruitment Solutions
        EC2, City of London, EC2Y 9AN
        Up to £635.63 per day
        Fully Onsite in London (EC2Y / Moorgate) International Banking Group £635.63pd Inside IR35 - 01/01/26 to 31/08/26?????? Are you ready to take ownership of cutting-edge data storage solutions across a major international banking group? As a Data Storage Engineer, you'll join a collaborative technical team with responsibility for designing, implementing, configuring and supporting mission-critical storage and backup infrastructure, including a Dell EMC environment, PowerStore, PowerScale/Isilon and ECM/Elastic Cloud Storage. Key Responsibilities * Manage and maintain block, file, and object data storage systems for business systems and end users. * Provide technical ownership and support for all online storage technologies, including connectivity and backup. * Deliver strategic projects, updates, and improvement plans for storage and backup systems.
        Fully Onsite in London (EC2Y / Moorgate) International Banking Group £635.63pd Inside IR35 - 01/01/26 to 31/08/26?????? Are you ready to take ownership of cutting-edge data storage solutions across a major international banking group? As a Data Storage Engineer, you'll join a collaborative technical team with responsibility for designing, implementing, configuring and supporting mission-critical storage and backup infrastructure, including a Dell EMC environment, PowerStore, PowerScale/Isilon and ECM/Elastic Cloud Storage. Key Responsibilities * Manage and maintain block, file, and object data storage systems for business systems and end users. * Provide technical ownership and support for all online storage technologies, including connectivity and backup. * Deliver strategic projects, updates, and improvement plans for storage and backup systems.
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        FEATURED
        About This Opportunity - We are supporting Welldone Consulting in their search for a founding Head of Delivery. This is a unique opportunity to establish, shape, and grow a business at the forefront of accessible mobile app consulting in the UK. About Welldone Consulting - Welldone Consulting focuses on building future-ready, inclusive, and commercially strategic mobile apps. Their mission is to help organisations not just comply with the European Accessibility Act but also to drive greater loyalty, adoption, and revenue by improving mobile user experiences for everyone. Role Purpose * Lead client engagements from initial contact to completion. * Develop frameworks for delivery and build an associate consultant model. * Serve as the public face and thought leader for the consultancy. Key Responsibilities - Client Engagement * Act as the main point of contact through p
        About This Opportunity - We are supporting Welldone Consulting in their search for a founding Head of Delivery. This is a unique opportunity to establish, shape, and grow a business at the forefront of accessible mobile app consulting in the UK. About Welldone Consulting - Welldone Consulting focuses on building future-ready, inclusive, and commercially strategic mobile apps. Their mission is to help organisations not just comply with the European Accessibility Act but also to drive greater loyalty, adoption, and revenue by improving mobile user experiences for everyone. Role Purpose * Lead client engagements from initial contact to completion. * Develop frameworks for delivery and build an associate consultant model. * Serve as the public face and thought leader for the consultancy. Key Responsibilities - Client Engagement * Act as the main point of contact through p
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        Data Migration Engineer - CRM - Remote - Outside IR35

        The Bridge (IT Recruitment) Limited
        The Borough, SE1 0AA
        £400 - 500 per day + None
        This is a fantastic opportunity to work as a Data Migration Engineer for a publishing company, on a remote contract, initially for 3 months and outside IR35. This Data Migration Engineer will join a team, responsible for the migration 6 CRMs to 1 new CRM and migrating 20 million rows of data. * CRM migration * APIs * Json * XML * Low code * Airtable (desirable) If you do have the relevant skills for this Data Migration Engineer contract, please do apply.
        This is a fantastic opportunity to work as a Data Migration Engineer for a publishing company, on a remote contract, initially for 3 months and outside IR35. This Data Migration Engineer will join a team, responsible for the migration 6 CRMs to 1 new CRM and migrating 20 million rows of data. * CRM migration * APIs * Json * XML * Low code * Airtable (desirable) If you do have the relevant skills for this Data Migration Engineer contract, please do apply.
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        Privacy Technologist / Tech Lead Consultant, contract, outside IR35, London Hybrid - You'll serve as the bridge between privacy compliance, engineering delivery and architecture governance ensuring privacy principles are implemented effectively throughout the software development lifecycle. This position requires a unique combination of technical depth, regulatory understanding, and agile delivery experience. You'll help turn high-level regulatory and policy requirements into concrete, testable technical stories and controls, directly influencing how privacy-by-design is Embedded in digital products and systems. Responsibilities - Privacy-by-Design in Agile Delivery * Integrate privacy requirements directly into Agile Release Trains (ARTs) and delivery squads, ensuring privacy is an integral part of feature and system design.
        Privacy Technologist / Tech Lead Consultant, contract, outside IR35, London Hybrid - You'll serve as the bridge between privacy compliance, engineering delivery and architecture governance ensuring privacy principles are implemented effectively throughout the software development lifecycle. This position requires a unique combination of technical depth, regulatory understanding, and agile delivery experience. You'll help turn high-level regulatory and policy requirements into concrete, testable technical stories and controls, directly influencing how privacy-by-design is Embedded in digital products and systems. Responsibilities - Privacy-by-Design in Agile Delivery * Integrate privacy requirements directly into Agile Release Trains (ARTs) and delivery squads, ensuring privacy is an integral part of feature and system design.
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        Airtable Developer - Remote - Outside IR35

        The Bridge (IT Recruitment) Limited
        The Borough, SE1 0AA
        £450 - 500 per day
        This is a fantastic opportunity to work as an Airtime Developer on a long term contract, outside IR35, on a remote basis. This Airtable Developer will be responsible for migrating 20 million rows of data and 6 CRMs into 1 CRM. * Airtable * APIs * AI * Databases If you do have the relevant experience for this Airtable Developer position, please do apply.
        This is a fantastic opportunity to work as an Airtime Developer on a long term contract, outside IR35, on a remote basis. This Airtable Developer will be responsible for migrating 20 million rows of data and 6 CRMs into 1 CRM. * Airtable * APIs * AI * Databases If you do have the relevant experience for this Airtable Developer position, please do apply.
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        £80,000 - £85,000 - Well-established and highly profitable construction engineering business is seeking an experienced IT Applications Manager to join them on a permanent basis. This is a critical leadership role within an organisation undergoing significant digital transformation, with ambitious growth and acquisition plans driving demand for scalable, standardised and efficient business applications. Reporting into the Head of IT, you will lead the delivery, governance and optimisation of business applications across the enterprise. This role blends strategic oversight, hands-on expertise with modern low-code/no-code platforms and direct leadership of a multidisciplinary applications team. The IT Applications Manager will oversee a suite of core enterprise systems, including but not limited to: Workday, UKG (Kronos), COINS, SharePoint, Snowflake, Autodesk Constructi
        £80,000 - £85,000 - Well-established and highly profitable construction engineering business is seeking an experienced IT Applications Manager to join them on a permanent basis. This is a critical leadership role within an organisation undergoing significant digital transformation, with ambitious growth and acquisition plans driving demand for scalable, standardised and efficient business applications. Reporting into the Head of IT, you will lead the delivery, governance and optimisation of business applications across the enterprise. This role blends strategic oversight, hands-on expertise with modern low-code/no-code platforms and direct leadership of a multidisciplinary applications team. The IT Applications Manager will oversee a suite of core enterprise systems, including but not limited to: Workday, UKG (Kronos), COINS, SharePoint, Snowflake, Autodesk Constructi
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        AI Deployment Engineer

        Inspiring Search
        SE15, South East London
        £30,000 per annum
        In 1914, Ernest Shackleton placed an advertisement seeking men for his Antarctic expeditionFor hazardousjourneyintounchartedterritory. Smallwages. Longhoursnavigatingcomplexity. Thousandsresponded. Today,weseekadifferentkindofpioneer;onewhowillchartthecoursethroughtheunexploredfrontierofartificial intelligence. We are not just implementing AI; we're defining what's possible. We're one of the first to venture into territories where others see only questions. Where they see complexity, we see opportunity. Wherethey see risk, we see the path forward. This role is looking for a talented AI Deployment Engineer who is keen to join a start-up! You will be joining a start-up with a mission to deploy cutting-edge AI systems for marketing businesses. This isn't about following playbooks, there are none. You'll be writing them. Every implementation is a first ascent.
        In 1914, Ernest Shackleton placed an advertisement seeking men for his Antarctic expeditionFor hazardousjourneyintounchartedterritory. Smallwages. Longhoursnavigatingcomplexity. Thousandsresponded. Today,weseekadifferentkindofpioneer;onewhowillchartthecoursethroughtheunexploredfrontierofartificial intelligence. We are not just implementing AI; we're defining what's possible. We're one of the first to venture into territories where others see only questions. Where they see complexity, we see opportunity. Wherethey see risk, we see the path forward. This role is looking for a talented AI Deployment Engineer who is keen to join a start-up! You will be joining a start-up with a mission to deploy cutting-edge AI systems for marketing businesses. This isn't about following playbooks, there are none. You'll be writing them. Every implementation is a first ascent.
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        Senior Enterprise Architect

        Gem Partnership
        The City, EC2N 4AG
        plus pension, bonus and healthcare
        Deep Azure expertise, with M365 ecosystem governance: Power Platform, E5 optimisation, Azure integration services such as Logic Apps, Service Bus, Event Grid, API Management).
        Deep Azure expertise, with M365 ecosystem governance: Power Platform, E5 optimisation, Azure integration services such as Logic Apps, Service Bus, Event Grid, API Management).
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        NEW

        SharePoint Developer

        PPF (Pension Protection Fund)
        CR0, Croydon
        From £56,000 to £61,500 per annum plus Civil Service pension and other
        You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration.
        You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration.
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        NEWFEATURED
        You'll also ensure alignment with enterprise-grade security practices, including zero trust principles, identity-aware routing, and integration with Azure API Management and Application Gateway. * API Gateway, Azure API Management (APIM), Azure Application Gateway
        You'll also ensure alignment with enterprise-grade security practices, including zero trust principles, identity-aware routing, and integration with Azure API Management and Application Gateway. * API Gateway, Azure API Management (APIM), Azure Application Gateway
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        NEW

        QA Engineer

        Mercator IT Solutions Ltd
        Southwark, SE1 9DG
        From £35,000 to £65,000 per annum
        Writing (looking for experience with Scala, JavaScript, Java or any ideally procedural programming or alternatively object-orientated language), running and debugging functional automation tests on an integrated development environment (IDE) for front-end and API testing and frameworks including Cucumber BDD or Junit or Rest Assured
        Writing (looking for experience with Scala, JavaScript, Java or any ideally procedural programming or alternatively object-orientated language), running and debugging functional automation tests on an integrated development environment (IDE) for front-end and API testing and frameworks including Cucumber BDD or Junit or Rest Assured
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        Frequently Asked Questions

        How many permanent API jobs are there in Hayes End?
        There are 84 permanent API jobs within 20 miles of Hayes End available on CWJobs right now.

        Where in Hayes End are these permanent jobs?
        You can find permanent jobs in The City, City (EC4), Ireland, Southwark.

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