27 contract net developer jobs found in London

Join this leading Insurance company as an Interim Back-End .NET Developer and play a key role in transforming a modern, high-impact claims automation platform. This is an exciting opportunity to work at the heart of a major claims’ integration programme, designing and building scalable APIs and microservices using the latest .NET technologies, including the likes of .NET Core, .NET 5+. Working within a collaborative and fast-paced delivery environment, you will develop robust backend solutions that integrate seamlessly across multiple systems, You’ll take ownership of designing, developing, and unit testing high-quality code, ensuring solutions are secure, performant, and aligned with best practice coding standards. This role is primarily backend-focused, with some opportunity to contribute minor front-end enhancements where required. Role: Senior .Net Backend Developer, Senior .Net Developer, .Net Core Developer, Software Engineer, Contract .Net Developer, Lead .Net Developer...

Join this leading Insurance company as an Interim Back-End .NET Developer and play a key role in transforming a modern, high-impact claims automation platform. This is an exciting opportunity to work at the heart of a major claims’ integration programme, designing and building scalable APIs and microservices using the latest .NET technologies, including the likes of .NET Core, .NET 5+. Working within a collaborative and fast-paced delivery environment, you will develop robust backend solutions that integrate seamlessly across multiple systems, You’ll take ownership of designing, developing, and unit testing high-quality code, ensuring solutions are secure, performant, and aligned with best practice coding standards. This role is primarily backend-focused, with some opportunity to contribute minor front-end enhancements where required. Role: Senior .Net Backend Developer, Senior .Net Developer, .Net Core Developer, Software Engineer, Contract .Net Developer, Lead .Net Developer...

Join this leading Insurance company as an Interim Back-End .NET Developer and play a key role in transforming a modern, high-impact claims automation platform. This is an exciting opportunity to work at the heart of a major claims' integration programme, designing and building scalable APIs and microservices using the latest .NET technologies, including the likes of .NET Core, .NET 5+. Working within a collaborative and fast-paced delivery environment, you will develop robust backend solutions that integrate seamlessly across multiple systems, You'll take ownership of designing, developing, and unit testing high-quality code, ensuring solutions are secure, performant, and aligned with best practice coding standards. This role is primarily backend-focused, with some opportunity to contribute minor front-end enhancements where required. Role: Senior .Net Backend Developer, Senior .Net Developer, .Net Core Developer, Software Engineer, Contract .Net Developer, Lead .Net...

.NET Developer, CMS, Sitecore, Optimizely, Umbraco - Remote (Tech stack: .NET Developer, CMS, Sitecore, Optimizely, Umbraco, .NET 10.0, C# 14, Angular 21, Agile, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client is a leading digital agency powerhouse, delivering transformative online experiences for some of the most recognised brands across Europe. Renowned for blending creativity with cutting-edge technology, they have built an unrivalled reputation for crafting innovative, scalable .NET-driven digital platforms that engage millions of users daily. As part of their continued growth and a surge in exciting Greenfield digital transformation projects, they are looking to recruit a talented .NET Developer to join their award-winning development team. This is an opportunity to work in a fast-paced agency environment where no two projects are the same-ranging from enterprise CMS-driven websites to complex, high-traffic digital ecosystems. Working in...

Azure Architect/.NET Developer - Azure, AWS, .NET, Azure Event Hubs, Kafka - 18 Month Contract - London - £550 - £650 P/Day - Outside IR35 Snr Azure Architect/.NET Developer with experience architecting/implementing large Azure based systems. Proven experience of large data high profile performance transactions, from AWS to Azure ideally within financial services. Skills & Duties: Excellent Azure architecture experience .NET Development Architecture/implementing systems migration from AWS to Azure Event driven processes across an asynchronous architecture Large data high profile performance transactions, ideally within financial services Azure Event Hubs, Kafka, and Message Bus Knowledge of Cosmos Database or Data Cubes Act as the Azure expert Coding experience in .NET and Python Mentor and train Jnr Developers Based in London 3 days a week with flex after 3 - 6 months - 2 days a week Azure Architect/.NET Developer - Azure, AWS, .NET,...

Front End Developer/UX Specialist - React | CMS | .NET environment Stellarmann are looking for a Front End Developer with strong UX capability to scope out a client's website build operations and then strategise, design and then build of a reusable white label website platform within a CMS/.NET based environment. You will play a hands on role across UX design, Front End development ensuring the solution is scalable, accessible, and easily customisable across multiple brands and use cases. Key Skills & Experience In-depth experience with UX/Wireframing, ideally in the design, build, and evolve of a white label website platform Strong experience with React, HTML, CSS, and modern CSS techniques Hands on experience with Kentico CMS and/or WordPress Experience working in .NET environments Proven experience designing and improving user journeys Experience working in agile delivery teams using Jira Experience building scalable, reusable Front End solutions or...

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 Solid understanding of JavaScript / TypeScript, HTML, and CSS Experience with REST APIs and JSON-based integration...

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 Solid understanding of JavaScript/TypeScript, HTML, and CSS Experience with REST APIs and JSON-based integration...

We are seeking a highly skilled Lead Developer to provide hands-on technical leadership across enterprise-scale Azure-based platforms within a secure, highly regulated environment. This role combines deep engineering capability with architectural influence and team leadership. This role involves leading development teams, ensuring adherence to coding standards, and leveraging modern DevOps practices to ensure the delivery of secure, scalable cloud-native systems. The Lead Developer will act as the technical backbone of the project, ensuring that solutions are not only functional but also optimized for long-term stability. Key Responsibilities Lead development of applications using MS Azure services. Oversee source code management within Git. Define and optimise CI/CD pipelines within Azure DevOps. Guide developers in using GitHub Copilot for AI-assisted coding. Champion cloud-native design principles and modern .NET practices. Conduct code reviews and enforce...

Senior Software Developer – Business Analysis Focus (Finance) Contract position Outside IR35 Remote Role Overview This is a contractor assignment for an experienced Senior Software Developer with a strong focus on business analysis and pre-development solution shaping within a finance environment. The role is designed to provide short-term, high-impact support to Finance and Digital teams by ensuring business needs are clearly understood, analysed and translated into actionable requirements before development begins. Key Responsibilities Engage with Accounting, Controlling and FP&A stakeholders to elicit, clarify and challenge requirements before software development starts. Analyse current-state and target-state finance processes, identifying inefficiencies, risks and opportunities for simplification. Translate business needs into clear, prioritised functional and non-functional requirements suitable for delivery teams. Act as the initial gatekeeper for new...

Senior Salesforce Developer | 6 Month Contract | Outside IR35 | Hybrid - London (2 days per month onsite) I'm currently looking for a Senior Salesforce Developer to join a client of mine for an urgent project. This is a great fit for someone who loves hands on engineering, enjoys solving real business problems, and wants the chance to get involved in AI driven project work. What you'll be doing Building and enhancing core Salesforce solutions across Sales Cloud, Service Cloud and platform components Working closely with architects, consultants and client stakeholders to deliver clean, scalable, well tested code Supporting integrations, data work and platform optimisation Contributing to AI focused initiatives (eg, intelligent automation, AI assisted development, workflow optimisation) Playing a key role in shaping technical delivery across multiple client engagements What we're looking for Strong experience as a Salesforce Developer (Apex, LWC, Flows, APIs) Solid...

Senior Full Stack Developer -Contract Opportunity (Outside IR35) 💰 Up to £700 a day 🌍 1 day a week in London 📅 Start: Monday 27th April ⏳ 6-month contract We’re looking for a Senior Software Engineer to take real ownership across a modern TypeScript stack, delivering end-to-end solutions across both backend (Priority) and frontend. 🔧 What you’ll be doing: *Building scalable APIs with Node.js, NestJS, Prisma & PostgreSQL *Developing modern frontends using React, Next.js & Vite *Integrating third-party tools (payments, auth, etc.) *Leveraging AI tools (e.g. Cursor, Claude, OpenAI) to enhance development workflows and productivity *Contributing to architecture, standards, and technical direction *Delivering production-ready systems from concept to deployment 🧠 What we’re looking for: *5+ years in fullstack development (TypeScript-focused) *Strong backend experience (Node.js, NestJS preferred) *Solid frontend skills (React, Next.js) *Experience...

Solution Architect - MS Dynamics, Power Platform - Higher Education Greater London, Hybrid Contract, outside IR35 £Competitive daily rate Key words: MS Dynamics, M365, D365, Higher Education, Dynamics CRM, Power Platform, Power Automate We are seeking an experienced Solution Architect to head the technical direction of a major modernisation program for our higher education industry client. Utilising Azure tools and working on MS Dynamics and other CRM technologies used in the Not For Profit/Education/Charity/Public Sector. Core Responsibilities: Design technical architecture/solution architecture for wider Dynamics CRM Implementation Understand and work with integration management teams, developers etc Experience required: Higher Education/Further Education Industry experience Ability to produce integration designs in line with the wider enterprise and solution architecture designs, patterns and principles Proven experience as...

Solution Architect - MS Dynamics, Power Platform Greater London, Hybrid Contract, outside IR35 £Competitive daily rate MS Dynamics, M365, D365, Higher Education, Dynamics CRM, Power Platform, Power Automate We are seeking an experienced Solution Architect to head the technical direction of a major modernisation program for our higher education industry client. Utilising Azure tools and working on MS Dynamics and other CRM technologies used in the Not For Profit/Education/Charity/Public Sector. Core Responsibilities: Design technical architecture/solution architecture for wider Dynamics CRM Implementation Understand and work with integration management teams, developers etc Experience required: Higher Education/Further Education Industry experience Ability to produce integration designs in line with the wider enterprise and solution architecture designs, patterns and principles Proven experience as Solution Architect/Integration Architect having...

SENIOR BUSINESS ANALYST (Retail/Luxury) [Product, Engineering, UX and more...] £450- £500 pd Outside IR35 12 months contract Hybrid, London Z1 Role Objective The Business Analyst will support the engagement team by translating business needs into clear, actionable requirements that guide strategic improvements to the client 's website and pages. This role partners closely with stakeholders, UX, Design, Product, Engineering and more, to understand processes, identify challenges, and uncover opportunities for value creation. Through data analysis, requirements documentation, and cross-functional collaboration, the Business Analyst works with the PO to ensure solutions are aligned with business goals and positioned to deliver measurable impact. Scope of Work Requirements & Analysis Conduct interviews, workshops, and surveys with stakeholders to capture functional and non-functional requirements. Analyse...

Power BI Developer (Outside IR35 Contract) – Data Design and Reporting (ERP / CRM) Contract Details Day Rate: £450 - £550 per day Initial Term: 3 months Extension: Highly likely based on delivery Hybrid: 2–3 days per week onsite (increased flexibility for the right candidate) Location: M40 / High Wycombe Expected: 2–3 days per week onsite (flexible for the right candidate) Start: ASAP (immediate availability highly desirable) The Opportunity We’re partnering with a fast-scaling, business following multiple acquisitions across the UK and Germany, the organisation is now consolidating its systems landscape, improving data visibility, and building a best-in-class reporting capability to support commercial decision-making. This will be working with fragmented data, automate reporting, and create meaningful insight across sales and supplier performance. The Role You’ll come in as a hands-on Power BI Developer , owning the end-to-end...

Job Advertisement: Senior Technical Business Analyst / Developer (Ruby on Rails) Duration: 6 months (with potential extension) Location: Remote IR35: Outside IR35 Join Our Dynamic Team! Are you a passionate Senior Software Developer with a knack for business analysis and a love for solving complex problems in the finance sector? If so, we have an exciting opportunity for you! Our client is seeking a talented professional for a temporary 6-month contract to support their Finance and Digital teams, and we want to hear from you! About the Role: In this vital position, you will play a key role in shaping software solutions that meet business needs before development kicks off. With your expertise in Ruby on Rails and business analysis, you will ensure that the requirements are not just understood but also prioritised and actionable. Your contributions will drive impactful changes and streamline finance processes. What You Bring: Hands-on experience with Ruby on...

Job Advertisement: Senior Technical Business Analyst/Developer (Ruby on Rails) Duration: 6 months (with potential extension) Location: Remote IR35: Outside IR35 Join Our Dynamic Team! Are you a passionate Senior Software Developer with a knack for business analysis and a love for solving complex problems in the finance sector? If so, we have an exciting opportunity for you! Our client is seeking a talented professional for a temporary 6-month contract to support their Finance and Digital teams, and we want to hear from you! About the Role: In this vital position, you will play a key role in shaping software solutions that meet business needs before development kicks off. With your expertise in Ruby on Rails and business analysis, you will ensure that the requirements are not just understood but also prioritised and actionable. Your contributions will drive impactful changes and streamline finance processes. What You Bring: Hands-on experience with Ruby on...

Job Advertisement: Senior Technical Business Analyst / Developer (Ruby on Rails) Duration: 6 months (with potential extension) Location: Remote IR35: Outside IR35 Join Our Dynamic Team! Are you a passionate Senior Software Developer with a knack for business analysis and a love for solving complex problems in the finance sector? If so, we have an exciting opportunity for you! Our client is seeking a talented professional for a temporary 6-month contract to support their Finance and Digital teams, and we want to hear from you! About the Role: In this vital position, you will play a key role in shaping software solutions that meet business needs before development kicks off. With your expertise in Ruby on Rails and business analysis, you will ensure that the requirements are not just understood but also prioritised and actionable. Your contributions will drive impactful changes and streamline finance processes. What You Bring:...

PHP Developer - Payments Migration Rate: £500 per day (Outside IR35) Duration: 6 months Location: Mostly remote - once per month in London or Bristol I am currently working with a leading financial services company to undertake a critical migration of payment functionality from a legacy on-premise PHP monolith into a new AWS-hosted Java microservice owned by a separate engineering team. We are looking for an experienced PHP contractor to own and deliver the PHP-side of the migration, ensuring existing payment journeys are updated to integrate with the new external payment component, while safely decommissioning legacy in-application payment logic. This role sits at the intersection of legacy PHP, payments, and service integration, and requires a strong focus on security, reliability, and seamless user experience. Responsibilities Modify existing PHP payment journeys to redirect or hand off to a new external payment component Implement secure redirect and callback...