1 to 25 of 44 Contract .NET Jobs in London

Senior .NET Engineer – Contract – Outside IR35 An opportunity has opened up for an experienced .NET contractor to join a financial services firm on a high-impact, semi-greenfield build focused on electronic trading and risk management systems. You’ll be working in a tight-knit team of engineers, contributing to the design and development of robust backend and … service-layer components. Key skills: Strong commercial experience with .NET, C# Solid understanding of distributed service architecture Experience in FX, e-trading, capital markets, or similar domains Exposure to messaging patterns and service buses (e.g. MassTransit, Azure Service Bus) Redis experience is a bonus This is a 6 month Outside IR35 contract assignment. The business is based in London More ❯

as a Software Engineering Lead on a remote contract, inside IR35, on a government project. The key skills required for this Software Engineering Lead role are: React Typescript Next .Net Microservices TDD If you do have the relevant experience for this remote Software Engineering Lead role, please do apply. More ❯

as a Software Engineering Lead on a remote contract, inside IR35, on a government project. The key skills required for this Software Engineering Lead role are: React Typescript Next .Net Microservices TDD If you do have the relevant experience for this remote Software Engineering Lead role, please do apply. More ❯

minimum of 3 days in the East London office, 2 days remote To be considered for the role you will require the following: At least 8+ years' experience of .NET C# development experience WPF development skills are essential Good knowledge of T-SQL, PL/SQL and/or MS SQL Server Extensive experience of Windows application development Understanding … of MS .NET Framework environments. Understanding of Object Oriented programming Flexibility in technical environments and task involvement A banking/financial services background would be a big plus NB: Due to the high volume of responses only applicants who meet the specific requirements will be contacted. PL/SQL, c#, c sharp, .net, studio, VBA, WPF, windows More ❯

performance and scalability. Diagnose and resolve issues and bugs in applications, providing ongoing Power Platform, canvas, CDS, PCF, power apps, HCL, Notes, Lotus Notes Version 9 - 12, Azure, C# .Net Mobile Site Contact Us About Partners Terms Privacy Cookies JobServe is a registered trademark of JobServe Ltd. Part of the Aspire Media Group. 2025 JobServe Ltd. All rights reserved. More ❯

Customise modules, entities, forms, and views to align with business processes and ensure easy to use experience for end users Manage and enhance existing bespoke web (ASP NET) and .NET applications currently integrated with future migration to plugins or PowerApps Utilise web development technologies (HTML, CSS, JavaScript, etc.) to enhance web-based CRM solutions Desired skills and experience: Experience … delivering customer facing digital solutions (Dynamics CRM highly desirable) Strong C# and .Net development skills Proficiency in JavaScript Knowledge and understanding of SQL databases and stored procedures Experience of working with Azure, such as App Service and DevOps Knowledge of utilising SharePoint with low code solutions such as Power Platform Hiring Process: Introductory Teams meeting with Venn Group, to More ❯

performance and scalability. Diagnose and resolve issues and bugs in applications, providing ongoing Power Platform, canvas, CDS, PCF, power apps, HCL, Notes, Lotus Notes Version 9 - 12, Azure, C# .Net Mobile Site Contact Us About Partners Terms Privacy Cookies JobServe is a registered trademark of JobServe Ltd. Part of the Aspire Media Group. © 2025 JobServe Ltd. All rights reserved. More ❯

minimum of 3 days in the East London office, 2 days remote To be considered for the role you will require the following: At least 8+ years' experience of .NET C# development experience WPF development skills are essential Good knowledge of T-SQL, PL/SQL and/or MS SQL Server Extensive experience of Windows application development Understanding … of MS .NET Framework environments. Understanding of Object Oriented programming Flexibility in technical environments and task involvement A banking/financial services background would be a big plus NB: Due to the high volume of responses only applicants who meet the specific requirements will be contacted. Keywords: developer, programmer, engineer, analyst, a/p, consultant, lead, leader, SQL, server … oracle. PL/SQL, c#, c sharp, .net, studio, VBA, WPF, windows More ❯

change management protocols Provide expert guidance across multiple technology platforms WHAT WE RE LOOKING FOR ESSENTIAL EXPERIENCE: Strong Power Platform development experience with comprehensive knowledge of the ecosystem C# .NET and JavaScript expertise for custom development and integrations HCL Notes/Lotus Notes experience - additional Legacy system capabilities Canvas and Model-driven Power Apps knowledge - full low-code understanding More ❯

and design review for large projects. Experience of multi-threaded and distributed applications, preferably with an understanding network of protocols. Strong Experience in developing Windows desktop applications in C# .NET environment, Windows Forms, TCP/IP & UDP protocols Please apply or call for more information. More ❯

and design review for large projects. Experience of multi-threaded and distributed applications, preferably with an understanding network of protocols. Strong Experience in developing Windows desktop applications in C# .NET environment, Windows Forms, TCP/IP & UDP protocols Please apply or call for more information. More ❯

change management protocols Provide expert guidance across multiple technology platforms WHAT WE'RE LOOKING FOR ESSENTIAL EXPERIENCE: Strong Power Platform development experience with comprehensive knowledge of the ecosystem C# .NET and JavaScript expertise for custom development and integrations HCL Notes/Lotus Notes experience - additional legacy system capabilities Canvas and Model-driven Power Apps knowledge - full low-code understanding More ❯

Software Developer – Contract – Fully Remote VIQU have partnered with a leading public sector organisation to recruit a .NET/C# Software Developer for a short-term contract. The Role: This Software Developer role will see the successful developer support the ongoing development, customisation, and maintenance of internal web applications and solutions. You will work on .NET web development … focus on pro-code development of web applications, as well as customisations for Power Apps. Key Skills & Experience: Solid commercial experience as a Software Developer, developing web applications using .NET and C# Proficiency building and customising Model-Driven Apps and Canvas Apps (Power Apps experience). Strong working knowledge of SQL and Microsoft Dataverse Experience developing and consuming REST More ❯

Job Opportunity: Application Developer - Microsoft .NET Location: Remote - Potential of 1 Onsite meeting P/Week in London Start Date: 4th August 2025 End Date: 6th March 2026 Rate: Up to £460/day - Inside IR35 - UMB About the Role We're looking for a talented and experienced Application Developer with strong Microsoft .NET skills to join our … a fantastic opportunity to work on modern, cloud-based applications in a mostly remote setup, with a collaborative and forward-thinking team. Key Responsibilities Develop and maintain applications using .NET 8 or above Collaborate with designers and stakeholders to bring user interfaces to life Participate in code reviews, testing, and deployment processes Ensure accessibility and performance standards are met … Essential Skills .NET 8+ - hands-on experience is a must Experience with Blazor for building interactive web UIs Nice to Have Experience converting Figma wireframes to web pages using Tailwind CSS Understanding of WCAG 2.1 AA accessibility standards Exposure to Cloud Migration and Modernisation Familiarity with AWS services Proficiency in SQL Why Join Us? Work on cutting-edge tech More ❯

Contract Role - .Net Blazor Developer - London/Hybrid - 06 Months Initial - Inside IR35 Role Overview: Job Title: .Net Blazor Developer Location: London/Hybrid (1 days onsite per week) Contract Type: Contract Duration: 06 months initially till March 2026 Sector: Government Hands on experience with .NET8 (or above) is essential and ideally has skills using Blazor. Converting Wireframe More ❯

Software Developer – Contract – Fully Remote VIQU have partnered with a leading public sector organisation to recruit a .NET/C# Software Developer for a short-term contract. The Role: This Software Developer role will see the successful developer support the ongoing development, customisation, and maintenance of internal web applications and solutions. You will work on .NET web development … focus on pro-code development of web applications, as well as customisations for Power Apps. Key Skills & Experience: Solid commercial experience as a Software Developer, developing web applications using .NET and C# Proficiency building and customising Model-Driven Apps and Canvas Apps (Power Apps experience). Strong working knowledge of SQL and Microsoft Dataverse Experience developing and consuming REST More ❯

performance and scalability. Diagnose and resolve issues and bugs in applications, providing ongoing Power Platform, canvas, CDS, PCF, power apps, HCL, Notes, Lotus Notes Version 9 12, Azure, C# .Net More ❯

**Test Automation Engineer** (Contract) Duration: Up until 31 March 2026 (Possibility for extension) Location: London/Hybrid (3 days on site) Rate: A highly competitive Umbrella Day Rate is available for suitable candidates About the Role We are launching a More ❯

**Test Automation Engineer** (Contract) Duration: Up until 31 March 2026 (Possibility for extension) Location: London/Hybrid (3 days on site) Rate: A highly competitive Umbrella Day Rate is available for suitable candidates About the Role We are launching a More ❯

liaise with other application support team staff. Following the existing team programming policy to keep a common development style to be shared in team members. Updating versions of MS .Net Framework and MS Visual .NET platform to include any necessary changes of existing systems running in Production. Liaising with the relevant support teams such as other Development sections More ❯

Senior .NET/C# Developer (Oracle to PostgreSQL migration) - Finance - Remote Duration: 6 months Rate: £500 - £600 Start: ASAP My client is looking for a Senior Developer to join the team to help with a migration. They are undertaking a strategic transformation of a legacy system built on PHP and Oracle, migrating to a modern architecture using PostgreSQL and … .NET (C#). This is not a simple lift-and-shift; the project involves re-engineering over 240 Oracle stored procedures, some highly complex, into performant, maintainable C# code. The new system will coexist with the legacy platform during the transition, requiring careful integration and support for business-as-usual (BAU) operations. Key Responsibilities Collaborate with the existing team … to re-engineer Oracle PL/SQL stored procedures into C# services. Design and implement .NET-based components that integrate with both legacy PHP systems and new PostgreSQL databases. Work closely with business analysts and stakeholders to ensure functional parity and identify opportunities for enhancement. Participate in the design of a hybrid architecture that supports phased migration. Use AI More ❯

Senior .NET/C# Developer (Oracle to PostgreSQL migration) - Finance - Remote Duration: 6 months Rate: £500 - £600 Start: ASAP My client is looking for a Senior Developer to join the team to help with a migration. They are undertaking a strategic transformation of a legacy system built on PHP and Oracle, migrating to a modern architecture using PostgreSQL and … .NET (C#). This is not a simple lift-and-shift; the project involves re-engineering over 240 Oracle stored procedures, some highly complex, into performant, maintainable C# code. The new system will coexist with the legacy platform during the transition, requiring careful integration and support for business-as-usual (BAU) operations. Key Responsibilities Collaborate with the existing team … to re-engineer Oracle PL/SQL stored procedures into C# services. Design and implement .NET-based components that integrate with both legacy PHP systems and new PostgreSQL databases. Work closely with business analysts and stakeholders to ensure functional parity and identify opportunities for enhancement. Participate in the design of a hybrid architecture that supports phased migration. Use AI More ❯

Senior Oracle Developer Oracle to .NET (C#) Migration Project Join a high-impact digital transformation project modernising a long-standing enterprise system. Migrating a complex platform from Oracle and PHP to a .NET (C#) architecture and we're looking for an experienced Oracle Developer to play a key role in this journey. You'll work at the intersection …/SQL logic into performant, readable C# code. Decoupling business logic from the Oracle database and transforming it into service-based architecture. Mapping Oracle data structures and types into .NET equivalents, ensuring performance and integrity. Collaborating on the migration from Oracle to Postgres or MySQL. Supporting a hybrid environment during rollout, where legacy Oracle systems and new .NET … What We're Looking For: Oracle PL/SQL experience, including deep expertise in stored procedures, triggers and packages. Proven experience re-engineering Oracle-based logic into C# within .NET environments. Strong understanding of Oracle database internals and data migration approaches. Experience in database migration from Oracle to Postgres or MySQL. Excellent analytical and problem-solving skills, with strong More ❯

Senior .NET/C# Developer Oracle to PostgreSQL Migration: Our client is embarking on a strategic transformation of a legacy enterprise platform, rebuilding a long-standing PHP and Oracle-based system into a .NET (C#) and PostgreSQL architecture. Seeking talented developers who are excited to work at the intersection of legacy systems, modern architecture and cutting-edge development … tooling. Your Responsibilities: Re-engineer Oracle PL/SQL logic into performant and maintainable C# services. Design and build .NET components that interact with both PostgreSQL and legacy PHP systems. Work closely with BAs and stakeholders to ensure functional parity and identify areas for modernisation or optimisation. Contribute to the design and delivery of a hybrid system architecture supporting … AI tools to assist with code analysis and migration. Participate in code reviews, contribute to testing strategies and support comprehensive documentation efforts. What You'll Bring: Experience developing in .NET/C#, particularly in backend and data access layers. Proven success migrating legacy systems, especially from Oracle to PostgreSQL or similar. Strong working knowledge of Oracle PL/SQL More ❯

Senior .NET Developer - Public Sector Project | £220/day (Inside IR35) Location: Predominantly remote, with occasional travel to Cardiff Contract: 6 months (with likely extension) Rate: £220 per day (Inside IR35, A4C Band 6 equivalent) Start Date: ASAP We're recruiting for a Senior Software Integration Developer (.NET) to join a high-impact digital programme delivering national clinical … Agile team developing features for the Welsh Nursing Care Record (WNCR) and related applications-supporting the delivery of modern, tech-enabled healthcare. Key Responsibilities: Develop software components using the .NET stack (C#), working across UI, API, messaging, and integrations. Collaborate with Business Analysts, Product Specialists, and other developers within a well-structured Scrum team. Mentor junior developers and contribute More ❯