44 net developer jobs found

.NET Developer / 6 months / Remote / £400-£450pd (Outside IR35) I am currently looking for a contract .NET Developer to join a public sector client of ours. This will be a remote, 6 month contract and has been determined outside IR35. Skills & Experience needed: .NET, C#, .NETCore AWS React Public sector experience If interested, please apply with your latest CV and I will be in touch to discuss in more detail. Best,Connor

.NET Developer Contract – Heavy Kendo UI Focus – Outside IR35 – £475/day I’m supporting a client with a key project, and we’re looking for a .NET MVC Developer with genuinely strong experience in Telerik Kendo UI . Kendo UI is not a secondary skill for this position – it is absolutely central to the delivery. The successful contractor will be helping to build a new licensing system that extends existing anti-doping and sample-tracking technology, and the UI layer relies heavily on Kendo components. If you are confident working with Kendo UI in-depth, this is a role where that expertise will be fully utilised and valued. What You’ll Be Working On Developing a new licensing platform across four interconnected modules Extensive use of Telerik Kendo UI for the front-end functionality Back-end development in .NET MVC Close collaboration with a Technical Director and Senior Lead, both of whom remain hands-on Autonomy and responsibility across the project...

.NET Developer/6 months/Remote/£400-£450pd (Outside IR35) I am currently looking for a contract .NET Developer to join a public sector client of ours. This will be a remote, 6 month contract and has been determined outside IR35. Skills & Experience needed: .NET, C#, .NETCore AWS React Public sector experience If interested, please apply with your latest CV and I will be in touch to discuss in more detail. Best, Connor

Senior Software Developer - 9 Month Contract (Outside IR35) I'm looking for an experienced Senior Developer for a 9 month initial contract for a client of mine in London to start in January 2026. Key Skills for the Senior .NET Developer contract: Experience with modern versions of .NET - Such as .NET 8 and above Excellent knowledge of CI/CD Pipelines / DevOps experience Microservices / Event Driven Architecture Kafka / RabbitMQ The role will involve either developing a greenfield application or upgrading existing legacy code into modern .NET 10. (TBC) Providing you fit all of the above skills criteria and can operate on a hybrid contract in London, please apply below and I will reach out to discuss further.

Contract FX .NET Developer - £600/day - OUTSIDE IR35 - Global Commodity OTC & Brokerage Firm - London A leading global commodities OTC & brokerage firm is seeking an experienced Senior Systems Developer with strong FX business knowledge to join on a contract basis. This role sits at the intersection of technology, risk, and trading, supporting front-office–aligned functions within a fast-paced environment. Key Responsibilities Deliver high-quality systems solutions across FX trading and risk workflows Work closely with brokers, traders, and risk teams to understand business requirements and implement robust technical solutions Contribute to the development, enhancement, and maintenance of key trading and risk platforms Integrate and optimise the use of internal and third-party libraries Support risk reporting systems and processes using C# Required Skills & Experience Deep business context and hands-on experience in FX (essential) Classic...

Role: Staff Software Engineer Sector: Life Sciences Location: London Days Onsite: 3 per week Day Rate: £800 Outside IR35 Duration: 4 Months then to extend or go Permanent iO Associates have partnered with Life Science Manufacturing company on their search for a Staff Software Engineer who has a strong background in integrating Medical Devices. This role will give you the opportunity to make a real impact in Healthcare and Life Sciences. Essential Requirements Strong .NET / C# background Significant experience integrating and communicating with hardware devices Ability to handle Windows devices, drivers, and communication layers 8+ years of experience at a staff-level , capable of working autonomously Not a web-focused developer; needs to be fully hardware-integration oriented Beneficial Experience gRPC , REST APIs , HTTP Integrating devices in Life Sciences Robotics integration (robotic arms, 6-axis systems) If you're interested, please...

Role: Staff Software Engineer Sector: Life Sciences Location: London Days Onsite: 3 per week Day Rate: £800 Outside IR35 Duration: 4 Months then to extend or go Permanent iO Associates have partnered with Life Science Manufacturing company on their search for a Staff Software Engineer who has a strong background in integrating Medical Devices. This role will give you the opportunity to make a real impact in Healthcare and Life Sciences. Essential Requirements Strong .NET/C# background Significant experience integrating and communicating with hardware devices Ability to handle Windows devices, drivers, and communication layers 8+ years of experience at a staff-level , capable of working autonomously Not a web-focused developer; needs to be fully hardware-integration oriented Beneficial Experience gRPC , REST APIs , HTTP Integrating devices in Life Sciences Robotics integration (robotic arms, 6-axis systems) If you're interested, please respond...

Umbraco Developer 3 Month Contract Outside IR35 Spalding, Lincolnshire (2 days on-site) £Competitive Salary + ASAP Start + Outside IR35 This is an excellent opportunity for an experienced and highly proficient Umbraco Developer to join a business at an exciting time of growth. This role offers a varied and interesting position where you will have freedom to work on bespoke projects. This company is a digital transformation company specialising in bespoke software development, legacy system support, and enterprise applications for a diverse range of clients. In this varied role you will design, develop, and maintain Umbraco-based web applications, implement clean and scalable code using .NET and C#, integrate REST APIs, while contributing to planning and code reviews, and ensure adherence to security standards using Git-based workflows and CI/CD. The ideal candidate will have previous commercial Umbraco CMS experience (including custom back-end...

C# Developer Remote Outside IR35 A client is seeking an experienced C# Developer to join their development team and support a key internal initiative. In this role, you'll also play a major part in configuring, enhancing, and integrating Microsoft Dynamics 365 within the business. As a Software Developer, you’ll collaborate closely with senior stakeholders to deliver clean, efficient, and reliable code that underpins critical business applications. Responsibilities: Produce well-structured and clearly documented C# / .NET code. Configure, customise, and maintain Microsoft Dynamics 365. Build and support integrations across Dynamics 365 and other systems. Develop plugins, workflows, and bespoke components within the Dynamics ecosystem. Work seamlessly with cross-functional teams in a fully remote setting. Take part in code reviews and contribute to help define best practices. Required Experience: Must have a strong background in C# / .NET...

Full job description Umbraco Developer 3 Month Contract Outside IR35 Spalding, Lincolnshire (2 days on-site) £Competitive Salary + ASAP Start + Outside IR35 This is an excellent opportunity for an experienced and highly proficient Umbraco Developer to join a business at an exciting time of growth. This role offers a varied and interesting position where you will have freedom to work on bespoke projects. This company is a digital transformation company specialising in bespoke software development, legacy system support, and enterprise applications for a diverse range of clients. In this varied role you will design, develop, and maintain Umbraco-based web applications, implement clean and scalable code using .NET and C#, integrate REST APIs, while contributing to planning and code reviews, and ensure adherence to security standards using Git-based workflows and CI/CD. The ideal candidate will have previous commercial Umbraco CMS experience...

C# Developer | Remote | Outside IR35 A client is seeking an experienced C# Developer to join their development team and support a key internal initiative. In this role, you'll also play a major part in configuring, enhancing, and integrating Microsoft Dynamics 365 within the business. As a Software Developer, you'll collaborate closely with senior stakeholders to deliver clean, efficient, and reliable code that underpins critical business applications. Responsibilities: Produce well-structured and clearly documented C#/.NET code. Configure, customise, and maintain Microsoft Dynamics 365. Build and support integrations across Dynamics 365 and other systems. Develop plugins, workflows, and bespoke components within the Dynamics ecosystem. Work seamlessly with cross-functional teams in a fully remote setting. Take part in code reviews and contribute to help define best practices. Required Experience: Must have a strong background in C#/.NET...

C# Developer | Remote | Outside IR35 A client is seeking an experienced C# Developer to join their development team and support a key internal initiative. In this role, you 'll also play a major part in configuring, enhancing, and integrating Microsoft Dynamics 365 within the business. As a Software Developer, you'll collaborate closely with senior stakeholders to deliver clean, efficient, and reliable code that underpins critical business applications. Responsibilities: Produce well-structured and clearly documented C# / .NET code. Configure, customise, and maintain Microsoft Dynamics 365. Build and support integrations across Dynamics 365 and other systems. Develop plugins, workflows, and bespoke components within the Dynamics ecosystem. Work seamlessly with cross-functional teams in a fully remote setting. Take part in code reviews and contribute to help define best practices. Required Experience: Must...

Umbraco Developer 3 Month Contract Outside IR35 Spalding, Lincolnshire (2 days on-site) £Competitive Salary + ASAP Start + Outside IR35This is an excellent opportunity for an experienced and highly proficient Umbraco Developer to join a business at an exciting time of growth. This role offers a varied and interesting position where you will have freedom to work on bespoke projects.This company is a digital transformation company specialising in bespoke software development, legacy system support, and enterprise applications for a diverse range of clients.In this varied role you will design, develop, and maintain Umbraco-based web applications, implement clean and scalable code using .NET and C#, integrate REST APIs, while contributing to planning and code reviews, and ensure adherence to security standards using Git-based workflows and CI/CD.The ideal candidate will have previous commercial Umbraco CMS experience (including custom back-end development), strong proficiency in .NET...

Umbraco Developer 3 Month Contract Outside IR35 Spalding, Lincolnshire (2 days on-site) £Competitive Salary + ASAP Start + Outside IR35 This is an excellent opportunity for an experienced and highly proficient Umbraco Developer to join a business at an exciting time of growth. This role offers a varied and interesting position where you will have freedom to work on bespoke projects. This company is a digital transformation company specialising in bespoke software development, legacy system support, and enterprise applications for a diverse range of clients. In this varied role you will design, develop, and maintain Umbraco-based web applications, implement clean and scalable code using .NET and C#, integrate REST APIs, while contributing to planning and code reviews, and ensure adherence to security standards using Git-based workflows and CI/CD. The ideal candidate will have previous commercial Umbraco CMS experience (including custom back-end development), strong...

Umbraco Developer 3 Month Contract Outside IR35 Spalding, Lincolnshire (2 days on-site) £Competitive Salary + ASAP Start + Outside IR35 This is an excellent opportunity for an experienced and highly proficient Umbraco Developer to join a business at an exciting time of growth. This role offers a varied and interesting position where you will have freedom to work on bespoke projects. This company is a digital transformation company specialising in bespoke software development, legacy system support, and enterprise applications for a diverse range of clients. In this varied role you will design, develop, and maintain Umbraco-based web applications, implement clean and scalable code using .NET and C#, integrate REST APIs, while contributing to planning and code reviews, and ensure adherence to security standards using Git-based workflows and CI/CD. The ideal candidate will have previous commercial Umbraco CMS experience (including custom back-end development), strong...

Developers (Dynamics 365 CE) - £500-£600 a day - Outside IR35 - London/Hybrid - 4 month intial contract. We need a highly skilled Dynamics 365 Developer to work with a Central Government client with extensive expertise in CRM Customer Engagement and Power Platform technologies. The role demands strong knowledge in Microsoft Dynamics 365 CRM customistion, integration, and development using various programming languages and frameworks. Core Technical Expertise Extensive experience as a Technical Consultant specialising in CRM Customer Engagement solutions Proficient in Power Platform technologies including Automate flows and Canvas Apps Strong skills in Dynamics 365 CRM configuration, customisation, and integration capabilities Expertise in integration technologies like Logic Apps, HTTP, JSON Proficiency in programming languages such as .NET, C#, JavaScript Development and Project Leadership Experienced in developing Dynamics plugins and enhancing forms with...

Developers (Dynamics 365 CE) - £500-£600 a day - Outside IR35 - London/Hybrid - 4 month initial contract. We need a highly skilled Dynamics 365 Developer to work with a Central Government client with extensive expertise in CRM Customer Engagement and Power Platform technologies. The role demands strong knowledge in Microsoft Dynamics 365 CRM customistion, integration, and development using various programming languages and frameworks. Core Technical Expertise Extensive experience as a Technical Consultant specialising in CRM Customer Engagement solutions Proficient in Power Platform technologies including Automate flows and Canvas Apps Strong skills in Dynamics 365 CRM configuration, customisation, and integration capabilities Expertise in integration technologies like Logic Apps, HTTP, JSON Proficiency in programming languages such as .NET, C#, JavaScript Development and Project Leadership Experienced in developing Dynamics plugins and enhancing forms with...

Umbraco Developer 3 Month Contract Outside IR35 Spalding, Lincolnshire (2 days on-site) £Competitive Salary + ASAP Start + Outside IR35 This is an excellent opportunity for an experienced and highly proficient Umbraco Developer to join a business at an exciting time of growth. This role offers a varied and interesting position where you will have freedom to work on bespoke projects. This company is a digital transformation company specialising in bespoke software development, legacy system support, and enterprise applications for a diverse range of clients. In this varied role you will design, develop, and maintain Umbraco-based web applications, implement clean and scalable code using .NET and C#, integrate REST APIs, while contributing to planning and code reviews, and ensure adherence to security standards using Git-based workflows and CI/CD. The ideal candidate will have previous commercial Umbraco CMS experience (including custom back-end...

This is an exciting opportunity for a BPSS Cleared Developer to work at the forefront of digital technology. The Full Stack Developer will work in a cutting edge public-sector project, seeking to exploit data for the benefit of the nation. Key Responsibilities: Support the design of a solution for maintaining legacy digital publication systems and developing a new platform. Contribute to the technical design as part of a competitive bid sprint. Apply experience from SOLAS (Safety of Life at Sea) -related environments and hydrographic/navigational chart domains. Support planning and approach for cloud migration of critical legacy systems. Required Skills / Experience: Strong experience in SOLAS (Safety of Life at Sea) or related maritime environments. Familiarity with hydrography and navigational charts (S-100 preferred; S-57 minimum). Working knowledge of a major cloud provider (AWS, Azure, or GCP). Experience with Infrastructure as Code tools such as...

Full-Stack Developer - HIRING ASAP - BPSS Clearance Start date: ASAP Duration: 2.5-week contract - Possibility of extension Location: Based in the London office Rate: £700 - £748 per day outside IR35 Key Skills Experience in a SOLAS (Safety of Life at Sea) environment This could include commercial shipping, government agencies (eg Maritime and coastguard agency) or an adjacent area. Familiarity with hydrography and navigational charts Ideally S-100 but S-57 at a minimum. Cloud & Legacy Migration Successfully contributed to the migration of critical Legacy systems to cloud-based infrastructure. Working knowledge of a major cloud provider (eg, AWS, Azure, or GCP) and familiarity with Infrastructure as Code (IaC) tools like Terraform or CloudFormation. Proficiency in at least one relevant Legacy language (eg, Java, C#, or .NET 8.0) or database system (eg, Oracle or SQL Server). Experience with web application development using frameworks such as ASP.NET MVC, Razor...