Contract C# Jobs in London

1 to 25 of 59 Contract C# Jobs in London

.Net Developer AI/ML Integration

London, South East, England, United Kingdom
Hybrid / WFH Options
Searchability
/ML components (NLP and recommendation systems). Collaborate in an Agile (Scrum/Kanban) environment with technical and business teams. TECH STACK/REQUIREMENTS Strong experience with .NET, C#, Azure, Power Platform Proven background building secure enterprise/banking systems AI/ML integration proficiency (NLP, recommendation systems) Compliance awareness Cloud deployment experience (Azure/AWS) - highly desirable Backend More ❯
Employment Type: Contractor
Rate: £400 - £450 per day
Posted:

Outsystem Developer

London, United Kingdom
ARM
principles and ability to apply them when building applications/solutions. Knowledge in database modelling and SQL programming (e.g. joins, count, group by, indexes, etc.). Good knowledge of C# and .Net including commonly used code libraries Bsc. in Computer Science or similar field of studies OutSystems Associate Reactive Developer certification UK residency or UK national to support eligibility for More ❯
Employment Type: Contract
Rate: GBP 550 - 575 Daily
Posted:

Outsystem Developer

London, South East, England, United Kingdom
Advanced Resource Managers Limited
principles and ability to apply them when building applications/solutions. Knowledge in database modelling and SQL programming (e.g. joins, count, group by, indexes, etc.). Good knowledge of C# and .Net including commonly used code libraries Bsc. in Computer Science or similar field of studies OutSystems Associate Reactive Developer certification UK residency or UK national to support eligibility for More ❯
Employment Type: Contractor
Rate: £550 - £575 per day, Negotiable
Posted:

Outsystem Developer

City of London, London, Finsbury Square, United Kingdom
ARM
principles and ability to apply them when building applications/solutions. Knowledge in database modelling and SQL programming (e.g. joins, count, group by, indexes, etc.). Good knowledge of C# and .Net including commonly used code libraries Bsc. in Computer Science or similar field of studies OutSystems Associate Reactive Developer certification UK residency or UK national to support eligibility for More ❯
Employment Type: Contract
Rate: £550 - £575/day Negotiable
Posted:

Software Developer

London, South East, England, United Kingdom
Hybrid / WFH Options
Oscar Technology
level support, troubleshooting, and performance monitoring with modern observability tools. Mentor and support junior engineers, collaborating with global teams. Required: Proven full-stack development expertise Node.js, TypeScript, JavaScript, and C#, .NET. Hands-on experience with cloud platforms (Azure preferred, AWS/GCP beneficial). Skilled in Kubernetes, Docker, Terraform, Helm, and CI/CD automation. Strong background in databases including More ❯
Employment Type: Contractor
Rate: Salary negotiable
Posted:

Contract Senior Software Engineer - eDV Cleared

London, South East, England, United Kingdom
Searchability NS&D
to R&D, implementation to automation. WE NEED THE SENIOR SOFTWARE ENGINEER TO HAVE.... Current enhanced DV clearance Experience with at least one of the following: Java, Python, C++, C#, .NET, JavaScript, React Experience mentoring juniors or leading teams is nice to have but not essential Experience/Knowledge of automation IT WOULD BE NICE FOR THE SENIOR SOFTWARE ENGINEER More ❯
Employment Type: Contractor
Rate: £500 - £750 per day
Posted:

Azure Developer

City of London, London, United Kingdom
Hybrid / WFH Options
Queen Square Recruitment Limited
application requirements. Write and tune queries to minimize RU consumption and improve response times. Implement indexing strategies and partitioning schemes for optimal performance. Build reusable libraries and frameworks in C#/.NET or Node.js Develop efficient queries using Cosmos DB SQL syntax. Implement automated testing and unit test frameworks Collaborate with solution architects and DevOps teams to integrate Cosmos DB More ❯
Employment Type: Contract
Rate: From £500 to £600 per day inside IR35, DOE
Posted:

Outsystems Developer

City of London, London, United Kingdom
ARM
principles and ability to apply them when building applications/solutions. Knowledge in database modelling and SQL programming (e.g. joins, count, group by, indexes, etc.). Good knowledge of C# and .Net including commonly used code libraries OutSystems Associate Reactive Developer certification UK residency or UK national to support eligibility for security clearances. Working in OutSystems applications that use a More ❯
Employment Type: Contract
Rate: £500/day Inside IR35
Posted:

Content Processing Technical Consultant - Developed Vetting

City of London, London, United Kingdom
PS Computer Services Ltd t/a Parker Shaw
testing. Planning and execution of unimpactful deployments. Maintain and support Live systems. Optimise delivery patterns. Maintain COTS (Commercial off the shelf) products integrated within Live systems. Required Skills & Experience: C#/java, .NET Core Containerisation (Docker, Kubernetes, OpenShift) xUnit Agile working practices CI/CD tooling Scripting experience (Python, Perl, Bash, etc.) ELK (Elastic stack) JavaScript Cypress Linux experience Search More ❯
Employment Type: Contract
Rate: Up to £700 per day inside IR35
Posted:

Microsoft Power Platform Developer

London, South East, England, United Kingdom
FDM Group
and Dataverse, SPFx Experienced in working with Microsoft Co-pilot Studio Experience with ALM Accelerator for Power Platform Excellent stakeholder management and relationship building skills Background in developing with C#, .NET, Web Services, Web Forms, MVC, JavaScript, jQuery, CSS, HTML, React, Web APIs and Visual Studio, API integrations Skilled in creating interface definitions Exposure to working with Agile development framework More ❯
Employment Type: Contractor
Rate: £50,000 - £60,000 per annum
Posted:

Senior C++ Software Engineer

London, South East, England, United Kingdom
Adecco
both written and verbal Desirable Skills Experience with Oracle databases Familiarity with event-driven distributed messaging systems (e.g., Kafka) Understanding of financial markets and the trade lifecycle Exposure to C# and GUI development If this opportunity aligns with your experience and career goals, please apply with your updated CV. More ❯
Employment Type: Contractor
Rate: Salary negotiable
Posted:

Web Developers - Full Stack & Backend (Remote)

City of London, London, England, United Kingdom
Hybrid / WFH Options
OP
services. Maintain design consistency, usability, and accessibility standards across applications. Requirements Proven experience as a Web Development experience. Expert knowledge of React v18+ with TypeScript. Practical knowledge of .NET (C#) and how React applications integrate with it. Familiarity with Azure environments, ideally including Azure Pipelines for CI/CD. Strong understanding of responsive design, accessibility, and performance optimization. Familiaity with More ❯
Employment Type: Contractor
Rate: £60.00 - £70.00 per hour
Posted:

Web Developer - 3 month contract

London, United Kingdom
OSS
services. Maintain design consistency, usability, and accessibility standards across applications. Requirements Proven experience as a Web Development experience. Expert knowledge of React v18+ with TypeScript. Practical knowledge of .NET (C#) and how React applications integrate with it. Familiarity with Azure environments, ideally including Azure Pipelines for CI/CD. Strong understanding of responsive design, accessibility, and performance optimization. Familiaity with More ❯
Employment Type: Contract
Rate: £60 - £70/hour
Posted:

Azure DevOps Engineer

London, South East, England, United Kingdom
Hybrid / WFH Options
Robert Half
automation in Azure. Profile The Azure DevOps Engineer will have proven experience as a DevOps Engineer with a focus on Azure cloud technologies. Strong background in software development (e.g., C#, Java, Python, or similar). Hands-on experience building and maintaining CI/CD pipelines (Azure DevOps, GitHub Actions, Jenkins, or similar). Strong understanding of monitoring, logging, and observability More ❯
Employment Type: Contractor
Rate: Salary negotiable
Posted:

Integration Developer-Azure-Salesforce-Student records

London, United Kingdom
Hybrid / WFH Options
InterQuest Group (UK) Limited
or other legacy student systems, particularly around data integration and synchronisation. Good understanding of CI/CD pipelines, automated testing, and Infrastructure-as-Code (ARM, Bicep, Terraform) Proficient in C#, PowerShell, JavaScript, or equivalent languages used in Azure development. Familiarity with Azure DevOps, GitHub, or similar tooling for backlog, code, and release management. Experience working in Agile delivery teams with More ❯
Employment Type: Contract, Work From Home
Rate: £450 per day
Posted:

Oracle CPQ Developer

London, United Kingdom
Hybrid / WFH Options
Infoplus Technologies UK Ltd
Minimum 7 years of hands-on Oracle CPQ experience. Must Have: Implementation Experience in CPQ Commerce and Configuration flows Technical Skills Must Have: Deep expertise in SQL, Java/C#, JavaScript, jQuery, XML/XSL, and BML. Development Methodologies Must Have: Experience with Agile/SCRUM is desirable. Global Collaboration Must Have: Ability to support multiple geographically dispersed teams. Communication More ❯
Employment Type: Contract, Work From Home
Rate: From £400 to £460 per day
Posted:

Oracle CPQ Developer - REMOTE

City of London, London, United Kingdom
Hybrid / WFH Options
Access Computer Consulting
have several years of hands-on Oracle CPQ experience. Implementation Experience in CPQ Commerce and Configuration flows is essential. You must also have deep expertise in SQL, Java/C#, JavaScript, jQuery, XML/XSL, and BML. Experience with Agile/SCRUM is also required for this role. You must have the ability to support multiple geographically dispersed teams and More ❯
Employment Type: Contract
Rate: £450 - £510/day
Posted:

IDM / One Identity Manager Developer

City of London, London, United Kingdom
Harvey Nash
Deep expertise in One Identity Manager : workflows, provisioning, RBAC, compliance. Integration experience with Active Directory, Azure AD, SAP , and other systems. Proficiency in SQL, VB.Net, PowerShell , and familiarity with C#, HTML, C++ , and Angular . Experience with OIM Designer , Ikasan , and software configuration management. Understanding of LDAP , web services, and Microsoft development tools. Please apply within for further details - Matt More ❯
Employment Type: Contract
Rate: £650 - £750 per day
Posted:

IDM / One Identity Manager Developer

London, South East, England, United Kingdom
Harvey Nash
Deep expertise in One Identity Manager : workflows, provisioning, RBAC, compliance. Integration experience with Active Directory, Azure AD, SAP , and other systems. Proficiency in SQL, VB.Net, PowerShell , and familiarity with C#, HTML, C++ , and Angular . Experience with OIM Designer , Ikasan , and software configuration management. Understanding of LDAP , web services, and Microsoft development tools. Please apply within for further details - Matt More ❯
Employment Type: Contractor
Rate: £650 - £750 per day
Posted:

Low Latency Java Developer

Central London, London, England, United Kingdom
Reed
role involves developing pricing, hedging, and low-latency order and price distribution systems for the eFX desk. You will be part of a team that includes both Java and C# developers working on server-side and UI components. Required Skills & Qualifications: Proven experience in Java development, specifically in low-latency environments. Strong understanding of FX or similar low-latency trading More ❯
Employment Type: Contractor
Rate: £850 - £915 per day, Inc benefits
Posted:

D365 Finance Senior Integration Developer remote

London, South East, England, United Kingdom
Hybrid / WFH Options
Hays Specialist Recruitment Limited
endpoints.Experience with external systems for financial data consolidation and ERP connectivity, including mapping tools (e.g., XSLT for XML).Proficiency in tools like Postman, Azure Logic Apps, and scripting (e.g., C#, PowerShell) for API orchestration, along with ETL processes.Knowledge of data mapping, XML/CSV/JSON formats, and handling large transaction volumes with retries, idempotency, and throttling.Expertise in Azure integration More ❯
Employment Type: Contractor
Rate: £500 - £550 per day
Posted:

D365 Finance Senior Integration Developer (remote)

London, United Kingdom
Hybrid / WFH Options
Hays
with external systems for financial data consolidation and ERP connectivity, including mapping tools (e.g., XSLT for XML). Proficiency in tools like Postman, Azure Logic Apps, and scripting (e.g., C#, PowerShell) for API orchestration, along with ETL processes. Knowledge of data mapping, XML/CSV/JSON formats, and handling large transaction volumes with retries, idempotency, and throttling. Expertise in More ❯
Employment Type: Contract, Work From Home
Rate: £500.0 - £550.0 per day + c£510 per day (inside IR35)
Posted:

Principal Engineer

London, United Kingdom
Experis
culture of collaboration, innovation, and continuous improvement. Develop engineering capability through coaching, recruitment, and career development aligned with DDaT frameworks. Excellent development skills, with a depth of experience including C#, Java (Spring Boot, JPA/Hibernate), REST API's, observability and monitoring, queue technologies and security. Detailed knowledge of best practices such as SOLID principles Experience of building new and More ❯
Employment Type: Contract
Rate: £600 - £630 per day
Posted:

Integration Engineer

London, South East, England, United Kingdom
Hybrid / WFH Options
Charles Simon Associates Ltd
HL7 v2.x, HL7 v3, and FHIR interoperability standards. Hands-on experience with integration engines such as Mirth Connect, Rhapsody, Cloverleaf, or InterSystems Ensemble. Proficiency in Java, JavaScript, Python, or C#/.NET for scripting and interface development. Experience designing and consuming REST/SOAP APIs (JSON, XML). Solid understanding of healthcare workflows and clinical systems (Epic, Cerner, Meditech, EMIS More ❯
Employment Type: Contractor
Rate: £450 - £550 per day
Posted:

Integration Engineer

EC1A, Farringdon, Greater London, United Kingdom
Hybrid / WFH Options
Charles Simon Associates Ltd
HL7 v2.x, HL7 v3, and FHIR interoperability standards. Hands-on experience with integration engines such as Mirth Connect, Rhapsody, Cloverleaf, or InterSystems Ensemble. Proficiency in Java, JavaScript, Python, or C#/.NET for scripting and interface development. Experience designing and consuming REST/SOAP APIs (JSON, XML). Solid understanding of healthcare workflows and clinical systems (Epic, Cerner, Meditech, EMIS More ❯
Employment Type: Contract
Rate: £450 - £550/day
Posted:
C#
London
10th Percentile
£375
25th Percentile
£404
Median
£575
75th Percentile
£738
90th Percentile
£813