51 to 74 of 74 Contract C# Jobs

Senior C# Engineer - Agentic AI, AWS, .Net 9

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £800 to £900 per day
Senior C# Engineer - Agentic Workflows & Native AI Engineering, .Net 8/9, AWS (Lambda, SQS) OUTSIDE IR35 Reporting to the Director of Engineering, this is a genuinely outstanding contract opportunity for a rockstar Senior C# Engineer to lead the development of a greenfield SaaS product . Were looking … twinned with experience of AI-Native Engineering and Agentic Workflow . Skills Were Looking For: SeniorStaff-level backend engineer with deep, current expertise in C# and .NET Core 8/9 , capable of architecting and leading the design of distributed REST API microservices at scale. Authority in AWS serverless architecture ...

C# Developer

Hiring Organisation
GCS
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £490/day inside IR35
Global bank based in Canary Wharf. Role - C# Developer - Desktop Applications Duration - 6 months with likely extension Rate - £490 p/d (inside IR35) Location - Hybrid/Canary Wharf Tech Stack C# WPF Winforms Javascript SQL Oracle Tasks Tasks range from understanding business requirements, designing application structures, business data analysis ...

C# Developer Role - Hybrid - Banking

Hiring Organisation
GCS
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£600 - £690/day Inside IR35
C# Developer Role - Hybrid/Liverpool street - 6 month Contract - Banking Role - C# Developer (T/SQL, PL/SQL) Duration - 6 months with very likely extension Location - Hybrid/Liverpool Street (London) - 3 days per week in a Liverpool Street office Rate - £690 per day (Inside IR35) Tech Stack … C# SQL Oracle Tasks Tasks include understanding business requirements, designing applications, business data analysis, programming in Visual C#.NET using both Oracle and SQL Server database, Unit testing, Quality Assurance (QA), Implementation, Production and Disaster Recovery environments supporting users and preparing documents. Along with the application development, this role will also ...

Senior DevSecOps Engineer

Hiring Organisation
Adecco
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £650 per day
strategies are resilient, auditable, and suitable for a financial services control environment Create and oversee build and delivery pipelines supporting applications written in Java, C# .NET, JavaScript (React JS), Python Ensure pipelines are production-grade, observable, and aligned to operational and audit expectations Cloud & Containerised Application Enablement Provide expertise … Extensive experience designing and delivering enterprise-scale CI/CD solutions, with GitLab experience essential Strong hands-on experience supporting build pipelines for Java, C#, JavaScript, and Python Proven experience building reusable CI/CD frameworks supporting multiple teams and products Cloud & Containerisation Strong experience with cloud platforms and modern ...

Terraform Infrastructure Engineer / IaC SME

Hiring Organisation
Salt
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£500 - £700.00 per day
Terraform Infrastructure Engineer/IaC SME - Banking Client - London, Paris, Brussels or Amsterdam Rate: Flexible Rate Hybrid Working: 8 days onsite per month - the rest is remote Duration: 1 year freelance We are seeking a ...

C# / C++ Software Engineer

Hiring Organisation
Certain Advantage
Location
Stevenage, Hertfordshire, South East, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£65 per hour, Benefits Overtime Rate
World Class Defence Organisation is currently looking to recruit 5x C#/C++ Software Engineer subcontractors on an initial 12 month contract. Desktop C# is the expertise the department are looking for; with some experience with C++ but doesnt need to be overly extensive. Job Title: C#/C++ Software … week onsite Contract: 37 Hours per week Duration: 12 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella) C#/C++ Software Engineer Job Description: WSSE are integral in the development of weapon systems and system architectures, and as a result we have developed ...

C# / C++ Software Engineer

Hiring Organisation
Certain Advantage
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£65 per hour, Benefits Overtime Rate
World Class Defence Organisation is currently looking to recruit 5x C#/C++ Software Engineer subcontractors on an initial 12 month contract. Desktop C# is the expertise the department are looking for; with some experience with C++ but doesnt need to be overly extensive. Job Title: C#/C++ Software … week onsite Contract: 37 Hours per week Duration: 12 Months (initially and then ongoing and long-term thereafter) IR35 status: Inside IR35 (Umbrella) C#/C++ Software Engineer Job Description: WSSE are integral in the development of weapon systems and system architectures, and as a result we have developed ...

Lead C# Engineer - Agentic Workflows & AI Engineering, AWS

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £800 to £900 per day OUTSIDE IR35
Lead C# Engineer - Agentic Workflows & Native AI Engineering, .Net 8/9, AWS (Lambda, SQS) OUTSIDE IR35 Reporting to the Director of Engineering, this is a genuinely outstanding contract opportunity for a rockstar Senior C# Engineer to lead the development of a greenfield SaaS product . Were looking … twinned with experience of AI-Native Engineering and Agentic Workflow . Skills Were Looking For: SeniorStaff-level backend engineer with deep, current expertise in C# and .NET Core 8/9 , capable of architecting and leading the design of distributed REST API microservices at scale. Authority in AWS serverless architecture ...

Contract C# Software Engineer

Hiring Organisation
Enterprise Recruitment Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
Contract C# Software Engineer Near Wimbledon 6-month contract Software Engineer role developing C# Windows applications that interface with hardware. This role is inside IR35 and requires on-site work 3 days per week (full time for the first few weeks). C# Software Engineer skills required - Good analytical skills … 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# Interfacing with hardware/physical products .NET environment, Windows Forms, TCP/IP & UDP protocols Please apply or call for more information. ...

Contract C# Software Engineer

Hiring Organisation
Enterprise Recruitment Ltd
Location
Wimbledon, Malden, Greater London, United Kingdom
Employment Type
Contract
Contract C# Software Engineer Near Wimbledon 6-month contract Software Engineer role developing C# Windows applications that interface with hardware. This role is inside IR35 and requires on-site work 3 days per week (full time for the first few weeks). C# Software Engineer skills required - Good analytical skills … 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# Interfacing with hardware/physical products .NET environment, Windows Forms, TCP/IP & UDP protocols Please apply or call for more information. ...

Front Office C# Developer - Commodities Derivatives

Hiring Organisation
Sanderson Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£700 - £750 per day
Front Office C# Developer - Commodities Derivatives Day Rate: Up to £750/day (Umbrella) Duration: 6 months initially Location: Marylebone - London Working Arrangement: Hybrid - 3 days per week onsite We're looking for a Front Office C# Developer to join a London-based leading Global Markets business team supporting … Ensure platform stability through robust testing and release control. Follow team standards for code review, deployment and architectural governance. Essential Strong commercial experience with C# Solid SQL Server experience Background working on complex, business critical platforms Experience with commodities and/or derivatives products Organised, delivery-focused, and comfortable working ...

Front Office C# Developer - Commodities Derivatives

Hiring Organisation
Sanderson
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£700 - £750 per day
Front Office C# Developer - Commodities Derivatives Day Rate: Up to £750/day (Umbrella) Duration: 6 months initially Location: Marylebone - London Working Arrangement: Hybrid - 3 days per week onsite We're looking for a Front Office C# Developer to join a London-based leading Global Markets business team supporting … Ensure platform stability through robust testing and release control. Follow team standards for code review, deployment and architectural governance. Essential Strong commercial experience with C# Solid SQL Server experience Background working on complex, business critical platforms Experience with commodities and/or derivatives products Organised, delivery-focused, and comfortable working ...

Senior Developer FX Options Risk

Hiring Organisation
Reed
Location
Central London, London, England, United Kingdom
Employment Type
Contractor
Contract Rate
£900 - £925 per day, Inc benefits
Trading, Quant, and Technology colleagues across London, Hong Kong, and New York, contributing to a modern technology stack that includes TypeScript/React UI, C# services, PostgreSQL, and pricing services integrating with quant libraries. Required Skills & Qualifications: Strong experience in C# and modern backend development. Solid understanding of TypeScript … cross-time-zone collaboration. Day-to-day of the role: React/TypeScript UI (20%): Real-time risk visualisation, scenario tools, trader workflows. C# Backend Services (30%): Pricing requests, risk aggregation, workflow orchestration. PostgreSQL (20%): Schema design, performance tuning, data modelling. Pricing Services/Quant Integration (30%): Interfacing with quant ...

AI Engineer - Agentic AI & LLM Solutions (Hybrid)

Hiring Organisation
McCabe & Barton
Location
London, United Kingdom
Employment Type
Contract
Retrieval-Augmented Generation) pipelines for domain-specific knowledge Work with vector databases and enterprise data sources Integrate AI solutions with existing .NET/C# enterprise systems where required Innovation & Best Practices Stay current with rapidly evolving LLM and agentic AI landscape Recommend appropriate AI frameworks and tools for different … agent frameworks such as LangChain, LlamaIndex, AutoGen, or similar Experience building multi-agent systems and orchestration workflows Knowledge of prompt engineering and optimization techniques C#/.NET background for enterprise integration in financial services Experience with RAG pipelines and vector databases (Pinecone, Weaviate, ChromaDB, etc.) Understanding of embedding models ...

Application Support Analyst - C# / SQL

Hiring Organisation
Adecco
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
tables and datasets Support releases, deployments and production stability Participate in on-call/occasional weekend support Skills & Experience Strong application production support experience C#, ASP.NET, .NET experience Strong Oracle, PL/SQL and SQL skills Experience working with complex, data heavy systems Good communication and problem-solving skills ...

Senior C# Engineer - Agentic AI, AWS, .Net 9

Hiring Organisation
Smart Sourcer Limited
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 800 - 900 Daily
Senior C# Engineer - Agentic Workflows & Native AI Engineering, .Net 8/9, AWS (Lambda, SQS) OUTSIDE IR35 Reporting to the Director of Engineering, this is a genuinely outstanding contract opportunity for a rockstar Senior C# Engineer to lead the development of a greenfield SaaS product click apply for full ...

C# Developer (Quants, FX)

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
C# Developer 6 Month ContractLocation: London (Hybrid) Lorien's UK leading Investment banking client are currently looking for a highly skilled C# Developer to join the team on an initial 6-month contract. Commodities FX Trading Quants knowledge Investment banking/FS Willing to learn If you find this opportunity ...

Mid - Junior C# Developer (Quants, FX)

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
C# Developer 6 Month ContractLocation: London (Hybrid) Lorien's UK leading Investment banking client are currently looking for a highly skilled C# Developer to join the team on an initial 6-month contract. Commodities FX Trading Quants knowledge Investment banking/FS Willing to learn If you find this opportunity ...

Front Office C# Developer - Commodities Derivatives

Hiring Organisation
Sanderson Recruitment
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 700 - 750 Daily
Front Office C# Developer - Commodities Derivatives Day Rate: Up to £750/day (Umbrella) Duration: 6 months initially Location: Marylebone - London Working Arrangement: Hybrid - 3 days per week onsite We're looking for a Front Office C# Developer to join a London-based leading Global Markets business team supporting ...

C# / C++ Software Engineer

Hiring Organisation
Certain Advantage
Location
Stevenage, Hertfordshire, United Kingdom
Employment Type
Contract
Contract Rate
GBP 65 Hourly
World Class Defence Organisation is currently looking to recruit 5x C#/C++ Software Engineer subcontractors on an initial 12 month contract. Desktop C# is the expertise the department are looking for; with some experience with C++ but doesnt need to be overly extensive. Job Title: C#/C++ Software ...

Lead C# Engineer - Agentic Workflows & AI Engineering, AWS

Hiring Organisation
Smart Sourcer Limited
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 800 - 900 Daily
Lead C# Engineer - Agentic Workflows & Native AI Engineering, .Net 8/9, AWS (Lambda, SQS) OUTSIDE IR35 Reporting to the Director of Engineering, this is a genuinely outstanding contract opportunity for a rockstar Senior C# Engineer to lead the development of a greenfield SaaS product click apply for full ...

MS Dynamics Developer (SC, DV or NATO cleared)

Hiring Organisation
Church International Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
clearance is required whether that is SC, DV or NATO. Key skills Dynamics 365 Finance & Operations (F&O) - customisation, configuration, and support X and C# development for extensions and integrations Data Entities and Data Management Framework (DMF) Power Platform - Power Automate, Power Apps, Dataverse Integration design - RESTful APIs, virtual tables … processes to support compliance and efficiency Manage and optimise data entities and data pipelines for reporting and synchronisation Extend system functionality using X and C# following best practices Support full life cycle implementations from requirements through to post-go-live Provide third-line support, troubleshooting, and performance tuning Collaborate with ...

Lead Automation Tester Engineer, C#, tyescript, Playwright

Hiring Organisation
Sanderson
Location
Farnborough, Hampshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£350 - £400 per day
environment. Skills & Experience: Proven experience as an Automation QA Engineer or SDET Strong hands-on experience building frameworks from scratch with Playwright in either C# or typescript Solid experience with API testing and tools such as Swagger Practical knowledge of SpecFlow and BDD methodologies Reasonable Adjustments: Respect and equality ...

Control Systems Engineer

Hiring Organisation
Vantage Consulting
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 400 - 450 Daily
develop, and maintain SCADA systems for defence-related projects Work with Siemens control systems, particularly WinCC OA (ETM) Develop and implement software solutions using C# and/or C++ Support system integration, testing, and commissioning activities Collaborate with multidisciplinary engineering teams to deliver robust solutions Troubleshoot and optimise system performance … Required Skills & Experience Proven experience working with WinCC OA (ETM/Siemens) Strong programming skills in C# and/or C++ Experience in control systems engineering within regulated or high-security environments Solid understanding of SCADA architectures and industrial control systems Ability to work independently and as part ...