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19 api developer jobs found

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Duration not stated api developer Greater London
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Contract Spy
Jan 07, 2026
Duration not stated
Salesforce Developer at Handelsbanken, London, £Day Rate
Contract Spy London, England, United Kingdom
Job Introduction Main Responsibilities As the Salesforce Developer this role will work closely with the Salesforce Technical Lead and Lead architect to help with the development, Integration and configuration of Salesforce platform and performing the day to day operations to maintain the platform by partnering with people across the business and broader IT team to deliver customer value through the extension of CRM services. Work on Salesforce FSC projects to integrate with 3 rd party SAAS systems and internal on Prem systems leveraging APIs, different integration patterns and tools. Leverage the existing DevOps tools and methodologies (Azure DevOps) for deployments of user stories/tickets/bugs. Analyse requirements and translate them into technical solutions especially around Integrations. Design, Build, and test applications ensuring high-quality delivery. Also, integral part of the Run/Ops team of Salesforce to help with BAU requests and maintain the...
Contract Spy
Jan 07, 2026
Duration not stated
Full-Stack React Developer with Python Experience at UST Global, London, 6 Months initial, £Contract Rate
Contract Spy London, UK
  1 Opening LONDON       Role description Full-Stack React Developer with Python Experience Location: London Hybrid working model-3 days from the client office in Central London Permanent/Contract inside IR 35/ Fixed term contract for initially 6 months with possible extensions Candidates with shorter notice periods and full work authorization in the UK will be given preference We’re looking for a skilled Full-Stack React Developer with strong Python backend experience to join our team. You’ll be working on a next-generation conversational AI platform, helping to build robust, scalable applications that integrate with Large Language Models (LLMs). This is a chance to dive into cutting-edge AI technology while contributing to both the frontend and backend of a modern web app. About the Platform The platform includes features such as: Document integration...
Contract Spy
Dec 31, 2025
Duration not stated
Cloud Developer at Satalia, London/Remote, £Contract Rate
Contract Spy London, UK
Cloud Developer Role type: Contract Location: UK Preferred start date: ASAP LIFE AS A SATALIAN As an organisation, we push the boundaries of data science, optimisation and artificial intelligence to solve the most complex problems in industry. Satalia, a WPP Company, is a community of individuals devoted to working on diverse and challenging projects, allowing you to flex your technical skills whilst working with a tight knit team of high performing colleagues. Led by our founder (who is also WPP’s Chief AI Officer), Satalia’s ambition is to become a decentralised organisation of the future. Today this involves developing tools and processes to liberate and automate manual repetitive tasks, with a focus on freedom, transparency and trust. At the core of our thinking is an approach to wellbeing and inclusivity. We unpack human behaviour and unpick prejudice to ensure a safe and inviting environment. We offer true flexible working and allow our...
Contract Spy
Dec 19, 2025
Duration not stated
Salesforce Developer at Handelsbanken, London, £Day Rate
Contract Spy London, UK
Salesforce Developer (Day Rate Contract) Job Introduction Main Responsibilities As the Salesforce Developer this role will work closely with the Salesforce Technical Lead and Lead architect to help with the development, Integration and configuration of Salesforce platform and performing the day to day operations to maintain the platform by partnering with people across the business and broader IT team to deliver customer value through the extension of CRM services. • Work on Salesforce FSC projects to integrate with 3 rd party SAAS systems and internal on Prem systems leveraging APIs, different integration patterns and tools. • Leverage the existing DevOps tools and methodologies (Azure DevOps) for deployments of user stories/tickets/bugs. • Analyse requirements and translate them into technical solutions especially around Integrations. • Design, Build, and test applications ensuring high-quality delivery. • Also, integral part of the Run/Ops...
Contract Spy
Dec 19, 2025
Duration not stated
Full-Stack React Developer with Python Experience at UST Global, London, 6 Months initial, £Contract Rate
Contract Spy London, UK
  1 Opening LONDON       Role description Full-Stack React Developer with Python Experience Location: London Hybrid working model-3 days from the client office in Central London Permanent/Contract inside IR 35/ Fixed term contract for initially 6 months with possible extensions Candidates with shorter notice periods and full work authorization in the UK will be given preference We’re looking for a skilled Full-Stack React Developer with strong Python backend experience to join our team. You’ll be working on a next-generation conversational AI platform, helping to build robust, scalable applications that integrate with Large Language Models (LLMs). This is a chance to dive into cutting-edge AI technology while contributing to both the frontend and backend of a modern web app. About the Platform The platform includes features such as: Document integration...
Contract Spy
Dec 16, 2025
Duration not stated
Salesforce Developer at Handelsbanken, London, £Day Rate
Contract Spy London, England, United Kingdom
Job Introduction Main Responsibilities As the Salesforce Developer this role will work closely with the Salesforce Technical Lead and Lead architect to help with the development, Integration and configuration of Salesforce platform and performing the day to day operations to maintain the platform by partnering with people across the business and broader IT team to deliver customer value through the extension of CRM services. Work on Salesforce FSC projects to integrate with 3 rd party SAAS systems and internal on Prem systems leveraging APIs, different integration patterns and tools. Leverage the existing DevOps tools and methodologies (Azure DevOps) for deployments of user stories/tickets/bugs. Analyse requirements and translate them into technical solutions especially around Integrations. Design, Build, and test applications ensuring high-quality delivery. Also, integral part of the Run/Ops team of Salesforce to help with BAU requests and maintain the...
Contract Spy
Jan 08, 2026
Duration not stated
Senior Systems Integration Test Analyst - Contract at Ten10, London, £375 per day
£375 per day
Contract Spy London, UK
Senior Systems Integration Test Analyst Rate: £375pd (Inside IR35) Duration: 3 months initially Location: London (Hybrid, 3 days per week onsite) Are you a highly experienced Senior Systems Integration Test Analyst with a proven track record in end-to-end technical systems validation? At Ten10, we’re a leading consultancy in Quality Engineering, Software Testing, and DevOps, and we’re looking for someone like you to join us on an interim basis for a challenging and impactful project. The Role: Specialist in Back-End Systems Integration You will play a crucial role in ensuring that our client’s integrated back-end systems meet the highest standards of quality. This role is highly focused on the technical depth of systems integration and requires a proactive, inquisitive approach to testing in a dynamic environment. We need a candidate who is naturally inquisitive, is comfortable asking detailed questions to seek clarity, and can thrive in a...
Contract Spy
Jan 07, 2026
Duration not stated
DevOps Engineer at Tokio Marine HCC, London, £Contract Rate (Outside IR35)
Contract Spy London, UK
Job Title: DevOps Engineer Reporting to: DevOps and Automation Manager Direct Reports: 0 Position Type: Contract, Outside IR35   Why Tokio Marine HCC? Standing still is not an option in the current world of Insurance. TMHCC is one of the world’s leading Specialty Insurers. With deep expertise in our chosen lines of business, our unparalleled track record and a solid balance sheet, TMHCC evaluates and manages risk like no one else in the industry. Looking beyond profit, empowering our people and delivering on our commitments are at the core of our customer values, along with a desire to grow and provide creative and innovative solutions to our clients.   About Operations Operations sits at the heart of TMHCC, we ensure the smooth running of all business processes – from policy administration and claims handling to data, technology, and delivery. We focus on driving efficiency which enables our teams across the...
Contract Spy
Jan 07, 2026
Duration not stated
Senior C#/.NET Developer at Fusion Practices Limited, London, £Contract Rate
Contract Spy London, United Kingdom
Overview We are seeking a Senior C#/.NET Developer to design, build, and lead the development of high-quality, scalable software solutions. This role combines hands-on engineering, technical leadership, and mentorship, playing a key role in architecture decisions and delivery excellence-particularly for systems that handle large, complex data sets and high-volume processing . Key Responsibilities Lead the design and development of applications using C#, .NET (.NET Core/.NET 6+) Design and optimize solutions that process and manage large-scale data sets with a focus on performance and scalability Define and enforce coding standards, architecture patterns, and best practices Architect scalable, secure, and maintainable solutions (monoliths or microservices) capable of handling high data throughput and concurrency Perform code reviews and mentor junior and mid-level developers Collaborate with product managers, architects, QA, and DevOps teams Translate...
Contract Spy
Jan 06, 2026
Duration not stated
Data Modeller at Handelsbanken, London, £Day Rate
Contract Spy London, England, United Kingdom
Job Introduction Main Responsibilities Operates in line with the Bank's Risk Management framework (including sub-frameworks) and relevant risk and compliance policies and procedures, ensuring appropriate and timely escalation of any concerns to their line manager. Designs logical data models in the Finance domain, aligned with the bank’s conceptual data model, to capture the organization's data requirements to support reporting, analytics, and operational use cases Collaborates with data stewards and subject matter experts to develop the logical data models aligned with business requirements when conceptual data models are not available and to confirm internal reference data in the Finance domain Inputs into the development of the bank’s conceptual data model and how it is applied. Works closely with Data and Solution Architects on projects to support the completion of High level solution architecture and Low level designs Collaborates with...
Contract Spy
Jan 06, 2026
Duration not stated
JUNIOR UI/UX DESIGNER at Digimasters Ltd, London, £150-£250 per day
£150 - £250 per day
Contract Spy London, UK
ABOUT DIGIMASTERS  Digimasters Ltd was founded in 2017 as a digital transformation consultancy focused on technology, business process optimisation and data analytics. Digimasters works across all industries and provides experience in organisations of all sizes. Primarily based in London, UK, we work in many regions including the US, EU, APAC and the Middle East. Digimasters takes on additional talent during large programmes of work. For our engagements with clients in Architecture, Engineering, and Construction (AEC), as well as other sectors, we have several roles supporting the delivery of technology, business change, and data programmes.  ROLE  We’re looking for an enthusiastic and motivated Junior UI/UX Designer to join our growing Digimasters team! This role is ideal for recent graduates looking to gain hands-on experience, build their design skills, and contribute to exciting digital transformation projects across a variety of industries.  As a Junior UI/UX...
Contract Spy
Jan 05, 2026
Duration not stated
Technical Lead – Shopify Development at Ecomlanders, London Area, £Contract Rate
Contract Spy London Area, United Kingdom
Job Description: About Us We’re a Shopify design and development agency partnering with direct-to-consumer brands across multiple industries. We turn Figma designs into pixel perfect, high performing Shopify stores that help brands scale their online presence.   The Role We’re looking for a Mid-weight Shopify Developer ready to step up into a technical leadership role on a retainer basis.   This isn’t a hands-on coding position — you’ll oversee technical quality, consistency, and efficiency across our global development team.   Your role is to refine processes, set standards, and elevate developer output across all client projects.   Key Responsibilities Review and approve all code before deployment (pull requests, theme updates, custom builds) Establish coding standards and best practices that work across multiple client themes Build and maintain a library of reusable,...
Contract Spy
Dec 22, 2025
Duration not stated
Java Full Stack Engineer at Quinnox Limited, The City, London, to £450 per day
£350 - £450 per day
Contract Spy City of London, London, UK
Job Description: Full Stack Engineer Contract: Inside IR 35  Duration: 3 months rolling Role Overview We are looking for a Full Stack Engineer with strong experience in React Native for mobile/front-end development and AWS-based backend systems . The ideal candidate has hands-on experience building scalable, event-driven applications using modern backend frameworks and cloud-native services. Key Responsibilities Design, develop, and maintain mobile applications using React Native Build and scale backend services using Spring Boot OR Node.js OR Python Develop and deploy cloud infrastructure on AWS , including: ECS , Lambda RDS SNS/SQS Implement event-driven architectures using Event Sourcing and/or CQRS Define and manage infrastructure using Terraform Collaborate with product, design, and DevOps teams to deliver high-quality solutions Ensure performance, security, and scalability of applications Write...
Contract Spy
Dec 22, 2025
Duration not stated
Technical Lead – Shopify Development at Ecomlanders, London Area, £Contract Rate
Contract Spy London Area, United Kingdom
Job Description: About Us We’re a Shopify design and development agency partnering with direct-to-consumer brands across multiple industries. We turn Figma designs into pixel perfect, high performing Shopify stores that help brands scale their online presence. The Role We’re looking for a Mid-weight Shopify Developer ready to step up into a technical leadership role on a retainer basis. This isn’t a hands-on coding position — you’ll oversee technical quality, consistency, and efficiency across our global development team. Your role is to refine processes, set standards, and elevate developer output across all client projects. Key Responsibilities Review and approve all code before deployment (pull requests, theme updates, custom builds) Establish coding standards and best practices that work across multiple client themes Build and maintain a library of reusable, cross-theme Shopify sections Audit existing client work and identify recurring...
Contract Spy
Dec 19, 2025
Duration not stated
Network Automation Lead at Bounteous, London Area, £Contract Rate
Contract Spy London Area, United Kingdom
Job Title: Network Device Automation Lead Location: London Position Type: Contract Job Description: Role Overview We are looking for a Network Device Automation Lead to design, develop, and implement automation solutions for network infrastructure. You will work closely with network operations and engineering teams to streamline device configurations, improve efficiency, and ensure compliance using Python, Ansible, and strong networking fundamentals. Key Responsibilities Develop and maintain automation scripts for network device configuration and management using Python and Ansible. Integrate automation workflows with network management systems and CI/CD pipelines. Perform network device provisioning, configuration, and troubleshooting. Collaborate with network engineers to identify automation opportunities and implement best practices. Ensure security and compliance standards in all automation processes. Document automation processes, scripts,...
Contract Spy
Dec 18, 2025
Duration not stated
Salesforce FSC Functional Analyst at Handelsbanken, London, £Day Rate
Contract Spy London, England, United Kingdom
Job Introduction Main Responsibilities As the Salesforce (Financial Services Cloud) Analyst this role will work closely with the Salesforce tech and product team to elicit requirements/user stories and to recommend solutions that will help deliver system enhancements and improved business performance, whilst ensuring regulatory compliance. Key Responsibilities Work on Salesforce FSC projects as a functional expert in the areas like customer onboarding, customer 360 and case management. Work with key stakeholders to ensure that 'To Be' end user processes are appropriate, documented and understood by end users and handed over to the tech team. Ensure a good understanding of all aspects of CRM project, both technical and non-technical. Requirements engineering: elicit, analyse and validate stakeholder requirements, business requirements and solution requirements (functional and non-functional). To document the requirements in the form of user stories supported...
Contract Spy
Dec 18, 2025
Duration not stated
iOS Engineer at Mindera, London, £Competitive Day Rate (Outside IR35(
Contract Spy London, England, United Kingdom
Description Here at Mindera, we are continuously developing a fantastic team, and would love it for you to join us. As an iOS Developer you will be responsible for creating fast, fluid, responsive and reliable mobile applications that provide our customers a rewarding experience. You’ll also play a key technical leadership role, working closely with architects, product managers, and cross-functional teams. You’ll have an opportunity to participate in the whole development cycle, using modern technologies, architectures and processes. When you join Mindera we welcome you into a fun and politics-free work culture, built on the principles of lean and self-organisation . Please note: This position requires you to work on client-site in central London three times a week Requirements You Rock at Swift, Cocoa Touch and other Apple frameworks Being self-driven and working with little supervision towards a common team or company purpose. Creating...
Contract Spy
Dec 11, 2025
Duration not stated
iOS Engineer at Mindera, London, £Competitive Day Rate (Outside IR35)
Contract Spy London, UK
  Description   Here at Mindera, we are continuously developing a fantastic team, and would love it for you to join us. As an iOS Developer you will be responsible for creating fast, fluid, responsive and reliable mobile applications that provide our customers a rewarding experience. You’ll also play a key technical leadership role, working closely with architects, product managers, and cross-functional teams. You’ll have an opportunity to participate in the whole development cycle, using modern technologies, architectures and processes. When you join Mindera we welcome you into a fun and politics-free work culture, built on the principles of lean and self-organisation .   Please note: This position requires you to work on client-site in central London three times a week   Requirements You Rock at Swift, Cocoa Touch and other Apple frameworks Being self-driven and working with little supervision towards...
Contract Spy
Dec 11, 2025
Duration not stated
Full-Stack Developer at VISUALHOUSE, London W1T 3EU, 3 Months, £Fixed Price - Please Quote
Contract Spy Newman St, London W1T 3EU, UK
  Creative House – Internal Platform Enhancement Project VISUALHOUSE is an international creative agency focused on creating compelling brand stories for architecture, design, and the built environment. We work worldwide with leading architects, developers, and designers on landmark projects. Each project is unique, and to each, we bring passion and expertise with our multidisciplinary creative teams skilled in 3D visualization, still imagery, film, and animation, as well as branding and interactive. Together, these disciplines form a cohesive and creative vision to produce compelling brand narratives for our clients. We have studios in New York, London and Barcelona. Visualhouse is seeking a talented Full-Stack Developer for a 3-month contract to help evolve and stabilise our internal platform Creative House which is used to create proposals, manage client and internal reviews, and store project data. This is a great opportunity for a developer who enjoys...
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