28 integration developer jobs found in London, greater london

Integration Developer (Backend + DevOps Focus) Location: Fully Remote Pay: £550-£600 per day (Outside IR35) Duration: Initial 6-month contract (with strong extension potential) The Role We're supporting a leading UK financial services organisation on a new platform build and they're looking for an Integration Developer with a strong DevOps background. This is a developer-first role with a significant DevOps leaning, ideal for someone who enjoys building Back End services ( TypeScript/Node.js on AWS) while owning how code is deployed, automated and operated at scale. You'll play a key role in designing and building deployment pipelines (Harness) while contributing to Back End engineering and platform integration work . Key Responsibilities Deliver infrastructure using Infrastructure as Code (Terraform) Develop high-quality Back End code in line with engineering standards Build and optimise CI/CD pipelines (Harness focus) Implement robust DevOps...

Integration Developer (Backend + DevOps Focus) Location: Fully Remote Pay: £550- £600 per day (Outside IR35) Duration: Initial 6-month contract (with strong extension potential) The Role We 're supporting a leading UK financial services organisation on a new platform build and they 're looking for an Integration Developer with a strong DevOps background. This is a developer-first role with a significant DevOps leaning, ideal for someone who enjoys building backend services ( TypeScript / Node.js on AWS) while owning how code is deployed, automated and operated at scale. You 'll play a key role in designing and building deployment pipelines (Harness) while contributing to backend engineering and platform integration work . Key Responsibilities Deliver infrastructure using Infrastructure as Code (Terraform) Develop high-quality backend code in line with engineering standards Build...

Boomi Integration Developer (ERP Programme) Location: Fully Remote UK, with occasional travel to an office Contract Type: Contract Duration: 6 Months Initial IR35 Status: Outside IR35 About the Role We are seeking a highly skilled Boomi Developer with proven experience integrating the ERP environment (Infor LN preferred) to join a digital transformation programme. You will be the core technical lead responsible for designing, building, and deploying robust, scalable integration pipelines between the ERP (Infor LN) and surrounding enterprise ecosystem (including CRM, MES, WMS, and third-party logistics/ 3PL partners). The ideal candidate will not just be a component builder in Boomi, but an integration specialist who understands complex manufacturing/ distribution data flows and can navigate the nuances of Infor LN data structures. Key Responsibilities Design & Build: design, develop,...

Microsoft Dynamics 365 CRM Technical Consultant (omni channel / contact centre / Customer service) | Outside IR35 | £450-475 per day | Fully Remote | 6 Months initial contract A large new Microsoft Dynamics 365 CRM project at a Microsoft Gold Partner requires a D365 CRM omnichannel technical consultant on an initial 6 month contract. If you are coming available and experienced with Microsoft dynamics 365 CRM Development (Customer service / contact centre), please apply. Skills Required: Proven Dynamics 365 Customer Service & Omnichannel expertise - Customer Service Workspace, case management, SLAs, unified routing, and digital channels (chat, email, voice). Strong Dynamics 365 CE development skills - hands-on C#/.NET plugins, JavaScript, customisations, integrations, and solution delivery. Power Platform experience - Power Apps and Power Automate Azure integration capability - experience with Azure Functions, Logic Apps, APIs, and integration design. Contact...

Microsoft Dynamics 365 CRM Technical Consultant (omni channel / contact centre / Customer service) Outside IR35 £450-475 per day Fully Remote 6 Months initial contract A large new Microsoft Dynamics 365 CRM project at a Microsoft Gold Partner requires a D365 CRM omnichannel technical consultant on an initial 6 month contract. If you are coming available and experienced with Microsoft dynamics 365 CRM Development (Customer service / contact centre), please apply. Skills Required: Proven Dynamics 365 Customer Service & Omnichannel expertise - Customer Service Workspace, case management, SLAs, unified routing, and digital channels (chat, email, voice). Strong Dynamics 365 CE development skills - hands-on C#/.NET plugins, JavaScript, customisations, integrations, and solution delivery. Power Platform experience - Power Apps and Power Automate Azure integration capability - experience with Azure Functions, Logic Apps, APIs, and integration design. Contact...

Microsoft Dynamics 365 CRM Technical Consultant (omni channel/contact centre/Customer service) | Outside IR35 | £450-475 per day | Fully Remote | 6 months initial contract A large new Microsoft Dynamics 365 CRM project at a Microsoft Gold Partner requires a D365 CRM omnichannel technical consultant on an initial 6 month contract. If you are coming available and experienced with Microsoft dynamics 365 CRM Development (Customer service/contact centre), please apply. Skills Required: Proven Dynamics 365 Customer Service & Omnichannel expertise - Customer Service Workspace, case management, SLAs, unified routing, and digital channels (chat, email, voice). Strong Dynamics 365 CE development skills - hands-on C#/.NET plugins, JavaScript, customisations, integrations, and solution delivery. Power Platform experience - Power Apps and Power Automate Azure integration capability - experience with Azure Functions, Logic Apps, APIs, and integration design. Contact...

Client : Public Sector Location : Hybrid, London or Birmingham, 2 days per week onsite Engagement Type : Contract (Outside IR35) Day Rate : Up to £600 per day depending on experience Clearance : Active SC Clearance required About the role A public sector client needs a Senior Boomi Architect to set the technical direction for a high-profile integration programme. This is the person who owns how integrations get designed across the estate, then stays close enough to the build to keep those standards real. You'll define the architecture and the reusable patterns the wider team delivers against. You'll also stay hands-on where it counts: shaping the complex integrations, unblocking the team, and making the calls that keep business-critical services running. It's a hybrid role. You'll be onsite at either the London or Birmingham office 2 days a week, with the site confirmed during the process. Key responsibilities Own the integration architecture on the Boomi...

Full Stack Developer - Contract Position - HIRING ASAP Location: London, 3 days in office per week & 2 days remote per week Start Date: ASAP Duration: Till end of September (view to extend thereafter) Daily Rate: £400 - £500 per day outside IR35 Key Responsibilities Delivery focused development support Join the team on a freelance basis to provide additional senior level development capacity when required Take on more complex or time sensitive development tasks within existing systems, working within established patterns and architectures Deliver well scoped features, integrations, and campaign builds without introducing unnecessary changes to core platform architecture Live support & problem solving Provide experienced development support during campaigns, helping diagnose and resolve issues quickly and pragmatically Assist with troubleshooting production issues, identifying root causes, and implementing safe fixes under the direction of the...

Senior Power Platform Developer Location: London (Hybrid) Contract: Initial 6 Months Start Date: July 2026 Rate: Day Rate DOE IR35 Status: Outside IR35 The Opportunity We are seeking multiple Senior Power Platform Developers to join a major digital transformation programme focused on replacing legacy applications with modern Microsoft Power Platform solutions. This is an opportunity to work on greenfield and re-platforming initiatives that will support thousands of end users, delivering modern digital experiences and streamlined operational processes. You will join established Agile teams and play a key role in designing, building and deploying enterprise-scale solutions using Microsoft Power Platform and Dynamics 365. What You'll Be Working On Projects include: Re-platforming legacy applications into Microsoft Power Platform. Building user-facing portals through Power Pages. Developing complex workflows and approval processes...

We are currently seeking an experienced Power Platform Developer to join our client's team on a contract basis in London. This is an opportunity to support a large-scale programme within the education sector, contributing to the design and delivery of scalable solutions across the Microsoft ecosystem. If you enjoy hands-on development, working closely with stakeholders, and delivering practical outcomes, this could be a strong fit. Key Responsibilities and Skills Power Platform Development: Strong experience across Power Apps (including model-driven apps), Power Automate, portal pages, solutions, and plugins. Security Configuration: Experience designing and implementing complex, role-based security models within Power Apps. Full Stack Development: Proficiency in JavaScript, HTML, and C#, supporting both front-end and back-end development. Integration: Experience integrating with third-party services using APIs. Azure DevOps: Familiar with managing development...

We are currently seeking an experienced Power Platform Developer to join our client's team on a contract basis in London. This is an opportunity to support a large-scale programme within the education sector, contributing to the design and delivery of scalable solutions across the Microsoft ecosystem. If you enjoy hands-on development, working closely with stakeholders, and delivering practical outcomes, this could be a strong fit. Key Responsibilities and Skills Power Platform Development: Strong experience across Power Apps (including model-driven apps), Power Automate, portal pages, solutions, and plugins. Security Configuration: Experience designing and implementing complex, role-based security models within Power Apps. Full Stack Development: Proficiency in JavaScript, HTML, and C#, supporting both Front End and Back End development. Integration: Experience integrating with third-party services using APIs. Azure DevOps: Familiar with managing...

Job Title: Senior Boomi Developer Client: Public Sector Location: Hybrid London or Birmingham, 2 days per week onsite Engagement Type: Contract (Outside IR35) Day Rate: Up to £600 per day Clearance: Active SC Clearance required About the role A public sector client is seeking an experienced Senior Boomi Developer to join a high-profile integration programme on an initial contract basis. This is a hands-on, end-to-end role covering the design, build, deployment, and ongoing support of integration processes that underpin business-critical services. This is a hybrid role combining onsite collaboration with remote working you'll be based at either the London or Birmingham site for 2 days per week, with the specific site confirmed during the process. Key responsibilities Lead hands-on design, development, deployment, and maintenance of integration processes using the Boomi AtomSphere platform, including Cloud Integration, Application Integration, and API...

Web Developer - (React, TypeScript & C#/.NET) We are looking for a Web Developer with strong React and TypeScript experience and some knowledge of C# and .NET to join a development team on an initial 12-month contract. Responsibilities Develop and maintain web applications using React and TypeScript. Contribute to Back End development using C# and .NET. Create and maintain automated tests. Review pull requests and support code quality standards. Perform integration testing and bug fixing. Update tasks and testing information within Azure DevOps. Produce and maintain technical documentation. Participate in Agile ceremonies including stand-ups, sprint planning, estimation sessions, and retrospectives. Support DevOps pipelines and deployment activities. Attend team meetings as required. Required Skills Commercial experience with React and TypeScript. Knowledge of C# and .NET. Experience with Git and source control. Understanding of...

Web Developer - (React, TypeScript & .NET) - Hybrid - Outside IR35 We are looking for a Web Developer with strong React and TypeScript experience and some knowledge of C# and .NET to join a development team on an initial 12-month contract. Responsibilities Develop and maintain web applications using React and TypeScript. Contribute to backend development using C# and .NET. Create and maintain automated tests. Review pull requests and support code quality standards. Perform integration testing and bug fixing. Update tasks and testing information within Azure DevOps. Produce and maintain technical documentation. Participate in Agile ceremonies including stand-ups, sprint planning, estimation sessions, and retrospectives. Support DevOps pipelines and deployment activities. Attend team meetings as required. Required Skills Commercial experience with React and TypeScript. Knowledge of C# and .NET. Experience with...

C#, WPF, .NET Developer - Hybrid - Outside IR35 - 12 month contract C#, WPF, .NET Developer is required by global company for an initial 12-month contract. The successful candidate will have experience with detailed design, development, implementation, integration, and testing of software in C# to build windows/web-based applications. The ideal contractor would have experience in software development in C# (.NET Core 2.1+, .NET Framework 4.6+) and Visual Studio 2022. Experience in WPF, user interface design and MVC/MVVM design patterns. Experience with connecting to and consuming RESTful web services. Experience with generic design-patterns (Dependency Injection, Inversion of Control and similar) and .NET Frameworks (MVVM, WPF, MEF, Entity Framework) in the construction of large and complex software applications. Experience of using version control (GIT), change control and code quality control/review processes. Experience of working in SCRUM...

Java Developer Location: London (3 days per week onsite) Duration: 12-Month Contract Rate: Up to £300 per day Outside IR35 Start Date: Immediate Start/ASAP We're currently supporting a major global financial services organisation as they continue to grow their engineering teams and are looking to engage multiple Mid-Level Java Developers for long-term contract assignments based in London. This is an opportunity to work within a modern software engineering environment, contributing to the design, development and delivery of enterprise-scale applications used by millions of customers worldwide. Key Responsibilities Design, develop and maintain Java-based applications using Java 11+ Build and enhance scalable microservices and distributed systems Develop and consume RESTful APIs Write clean, maintainable and testable code following engineering best practices Contribute to automated testing and test-driven development initiatives Collaborate...

🚀 Senior Platform Engineer – Outside IR35 🚀 📍 London (3 days onsite) 📅 Start: July 💰 Depending on experience ⏳ 6 Months Initial I'm working with a leading engineering consultancy who are building a cohort of senior engineers to support a large-scale enterprise software programme. We're particularly interested in platform-focused engineers with deep cloud and Kubernetes expertise. The Role Design, deploy and operate cloud-native platforms Support engineering teams with scalable infrastructure and developer tooling Build secure, highly available environments across AWS, Azure and GCP Contribute to platform automation, observability and infrastructure-as-code initiatives Experience Required Kubernetes (EKS, AKS or GKE) Terraform and Infrastructure as Code AWS, Azure and/or GCP CI/CD, GitOps and platform automation Security, governance and cloud best practices Experience supporting enterprise SaaS platforms A plus if you have...

Kotlin Developer (SC Cleared) Outside IR35 We are seeking experienced Kotlin Developers to join a high-profile national digital programme, building secure, scalable, and user-focused Android applications that support a major government digital transformation initiative. This is an opportunity to work on modern mobile products with significant public impact, leveraging the latest Android technologies and best practices. You'll collaborate closely with product managers, designers, delivery specialists, and fellow engineers to create high-quality, reliable, and secure mobile experiences used at scale. Due to the nature of the programme, active SC clearance is required . Key Responsibilities Design, develop, and maintain modern Android applications using Kotlin as the primary language. Build responsive and scalable user interfaces using Jetpack Compose . Architect robust, maintainable, and testable solutions following Android best practices and modern design...

ServiceNow Vulnerability Response Developer (Contract) Remote (UK) | Outside IR35 | Initial 6 months | Likely Extension We're looking for an experienced ServiceNow Vulnerability Response Developer to join a large-scale cyber security programme. This is a predominantly remote role with occasional workshops in London. Key Responsibilities Develop and enhance ServiceNow Vulnerability Response capabilities Build integrations with security tooling and automate remediation workflows Configure scripts, flows, dashboards and reporting Work with security, infrastructure and platform teams to improve vulnerability management processes Essential Skills Strong ServiceNow development experience Proven experience with ServiceNow Vulnerability Response (VR) JavaScript, REST APIs and IntegrationHub expertise Experience integrating tools such as Tenable, Qualys, Rapid7, Microsoft Defender or CrowdStrike Good understanding of vulnerability management and CMDB concepts...

📊Contract Project Manager | AI & Automation | Private Equity | SaaS | Outside IR35 📊 Role: Project Manager (Contract) Rate: up to £590 p/d (Outside IR35) Duration: 12-month contract (likely to extend) Location: Central London - 3 days p/w in office We're partnered with a leading global investment firm investing across private equity and credit markets, who are looking for a Project Manager to join their central change team. This is a broad role delivering multiple SaaS and internally developed technology initiatives across the business, while helping drive the adoption of AI and automation 🤖 As Project Manager, you'll own projects end-to-end, working with senior stakeholders, technical teams and external vendors to deliver high-impact change across a fast-paced environment. What you'll be doing Delivering multiple concurrent technology projects Leading SaaS implementations and vendor-led change Working with internal teams on...