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40 net developer jobs found

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Outside Spy
Mar 10, 2026
Duration not stated
Snr C#.Net Developer - Entity, AWS - 3 Months at Jump IT Recruitment , London, £450 to £500 per Day
£450 - £500 per day
Outside Spy London, UK
.Net 6, .Net 10, C#, ASP.NET, .NET Core, AWS, CDK, IaC, Cognito, S3, KMS, CI/CD, Docker, Containers, Entity, Firebase 3-month contract role. Outside IR35. £500 per day. Must be a UK based candidate. No visa sponsorship or visa transfer. Experience within Healthcare, Pharma or LifeSciences is a definite advantage. The role will involve the following: Migrate the platform to .NET 10 LTS Implement secrets management using AWS Secrets Manager Strengthen authentication and authorisation mechanisms Enhance audit trail and compliance features for healthcare regulations Improve API security, including rate limiting and CORS configuration Update Docker containers and CI/CD pipelines Establish and expand unit and integration test coverage Work with Clean Architecture patterns across the solution To start ASAP. Please email a CV to Roger at Jump IT in the first instance.
Outside Spy
Mar 10, 2026
Duration not stated
Snr C#.Net Developer - Entity, AWS - 3 Months at Jump IT Recruitment Solutions Ltd, London, £Contract Rate
Outside Spy London, UK
.Net 6, .Net 10, C#, ASP.NET, .NET Core, AWS, CDK, IaC, Cognito, S3, KMS, CI/CD, Docker, Containers, Entity, Firebase 3-month contract role. Outside IR35. £500 per day. Must be a UK-based candidate. No visa sponsorship or visa transfer. Experience within Healthcare, Pharma or Life Sciences is a definite advantage. The role will involve the following: Migrate the platform to .NET 10 LTS Implement secrets management using AWS Secrets Manager Strengthen authentication and authorisation mechanisms Enhance audit trail and compliance features for healthcare regulations Improve API security, including rate limiting and CORS configuration Update Docker containers and CI/CD pipelines Establish and expand unit and integration test coverage Work with Clean Architecture patterns across the solution To start ASAP. Please email a CV to Roger at Jump IT in the first instance.
Outside Spy
Mar 12, 2026
Duration not stated
Mid-Level .NET / Full Stack Developer – Hybrid – £450/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven at VirtueTech Recruitment Group, London Area, £450 per day
£450 per day
Outside Spy London Area, United Kingdom
Mid-Level .NET / Full Stack Developer – Hybrid – £450/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven We have a great opportunity for a Mid-Level .NET / Full Stack Developer to join a growing payments company. As a .NET Developer , you’ll be working as part of an experienced engineering team building and scaling a high-throughput payments platform. The business is entering its next phase of growth, launching new products, enabling new partner integrations, and expanding a platform that already powers multiple live financial services products used globally. You’ll be contributing to a modern, cloud-native platform built with .NET and Azure , designed around API-first architecture and event-driven microservices . The platform supports complex payment flows, partner integrations, and high-volume transaction processing. This is a hands-on development role where you’ll work closely with senior engineers to deliver reliable, scalable...
Outside Spy
Mar 12, 2026
Duration not stated
Lead .NET/Full Stack Developer - Hybrid - Up to £700/day Outside IR35 | C# | Azure | Event Driven Systems | Payments | API Driven at VirtueTech Recruitment Group, London Area, £700 per day
£700 per day
Outside Spy London Area, United Kingdom
Lead .NET/Full Stack Developer - Hybrid - £700/day Outside IR35 | C# | Azure | Event Driven Systems | Payments | API Driven We have a unique opportunity for a Lead .NET/Full Stack Developer to join a payments company. As the Lead .NET/Full Stack Developer , you’ll play a key role in shaping and scaling a high-throughput payments platform as the business enters its next phase of growth. This includes launching new products, enabling new partner integrations, and expanding a platform that already powers multiple live financial services products used globally. You’ll be building on top of a modern, cloud-native platform built with .NET and Azure , designed around API-first architecture and event-driven microservices . The platform supports complex payment flows, partner integrations, and high-volume transaction processing. This is a hands-on technical role where you’ll help drive engineering best practices, contribute to architectural decisions, and mentor...
Outside Spy
Mar 12, 2026
Duration not stated
Senior .NET / Full Stack Developer – Hybrid – £600/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven at VirtueTech Recruitment Group, London Area, £600 per day
£600 per day
Outside Spy London Area, United Kingdom
Senior .NET / Full Stack Developer – Hybrid – £600/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven We have a unique opportunity for a Senior .NET / Full Stack Developer to join a payments company. As a Senior .NET / Full Stack Developer , you’ll play a key role in building and scaling a high-throughput payments platform as the business enters its next phase of growth. This includes launching new products, enabling new partner integrations, and expanding a platform that already powers multiple live financial services products used globally. You’ll be building on top of a modern, cloud-native platform built with .NET and Azure , designed around API-first architecture and event-driven microservices . The platform supports complex payment flows, partner integrations, and high-volume transaction processing. This is a hands-on senior engineering role where you’ll contribute to architectural discussions, drive engineering best...
Outside Spy
Mar 16, 2026
6 Months or more
c# developer, banking, £750 Outside IR35, Remote, London at CipherTek Recruitment, London, 12 Months, £Contract Rate
Outside Spy Remote (London, UK)
Role: Expert .NET Developer - Cross Asset Trading System Location: Very Flexible. Can offer Remote with occasional travel to London City offices Contract: 12 months Rate: Up to £750/day (OUTSIDE IR35) About the Role: We are partnering with a leading investment bank on an ambitious programme to modernise and enhance their cross-asset trading systems. This is a technically challenging, hands-on role, ideal for an expert .NET developer with a strong SQL Server background and experience working in financial environments. Please note, you MUST have very strong low level C#, able to work through complex multithreaed performance issues. Good understanding of multi-threading, garbage collection, concurrency, the CLR is very important for this role. You will be joining a highly skilled team focused on performance, reliability, and scalability, tackling complex issues in Real Time, data-driven applications. This is purely a tech-heavy role-business knowledge is helpful but not...
Outside Spy
Mar 11, 2026
6 Months or more
Full Stack Developer - C# - Angular - SQL - Banking - Remote/London - Outside IR35 possible at Exceed Business Intelligence Limited, Remote/London, 6 Months, £Contract Rate
Outside Spy Remote (Remote/London, UK)
Full Stack Developer - C# - Angular - SQL - Banking - Remote/London - Outside IR35 possible We are looking for a strong full stack developer, with excellent Front End development skills. Must have: Strong Front End and UI development skills with: Angular, JavaScript and TypeScript C# SQL Excellent Communication skills Very nice to have: GitHub and use of agentic coding assistants such as GitHub CoPilot Azure Docker Ideally come from banking/finance background (Capital Markets/Retail Banking) or similar. Degree in Maths/Physics/Computer Science/IT from Rebrick University. The role is remote based or in London. Suitable applicants could include: .NET Developer, Front End Developer, Web Developer etc.
Outside Spy
Mar 18, 2026
Duration not stated
AI Engineer / AI Developer - Outside IR35 - UK based at Gigged.AI, Glasgow, £600~ per day
£600~ per day
Outside Spy Glasgow, Scotland, United Kingdom
Gigged.AI is an open talent marketplace specialising in the IT and technology sector. We have an opportunity live at the moment looking for a AI Engineer / AI Developer - Outside IR35 - UK based All proposals will be reviewed on the Gigged AI platform. In order to send a proposal please head to www.gigged.ai and create a free talent profile. Once signed in, follow this link (https://app.gigged.ai/find-a-gig/Jry0K8aDdYa) where you will see a ‘submit proposal’ button. Please ensure your CV is attached to the proposal. Project: AI-Driven Fleet Management Pilot Start: April 2026 Duration: 6 months IR35: Outside, pending final determination Rate: £600~ per day, flexibility depending on experience Mainly Remote - Occasional travel to either Glasgow or London office would be advantageous. Overview We are working towards our net-zero emissions target by 2030, transitioning our global fleet to more sustainable technologies...
Outside Spy
Mar 12, 2026
Duration not stated
Contract Senior Software Engineer - eDV Cleared at Searchability NS &D, London, £Contract Rate
Outside Spy London, UK
CONTRACT SENIOR SOFTWARE ENGINEER - eDV CLEARED NEW CONTRACT JOB OPPORTUNITY AVAILABLE WITHIN A LEADING NATIONAL SECURITY COMPANY FOR A SENIOR SOFTWARE ENGINEER WITH eDV CLEARANCE Contract job opportunity for a Senior Software Engineer Globally leading defence / cyber security company £500 - £750 per day (inside and outside IR35 roles available) London based organisation in an easily accessible location Contract Senior Software Engineer To apply please call or email WHO WE ARE? We are recruiting multiple contract Senior Software Engineers to work with various clients in London ranging from R &D companies, Multi-National Consultancies to SME 's and product based companies. Due to the nature of the work these clients do, you must hold enhanced DV Security Clearance. WHAT WILL THE SENIOR SOFTWARE ENGINEER BE DOING? As a Senior Software Engineer, you will work with an experienced agile team to design and deliver...
Outside Spy
Mar 09, 2026
6 Months or more
ShareDo Developer at Dcoded, Manchester, 6 Months, £450-£500 per day
£450 - £500 per day
Outside Spy Manchester, UK
ShareDo Developer - Legal Tech £500 per day | Outside IR35 | Remote | 3-month initial engagement We are supporting a leading UK law firm undertaking continued investment in their legal technology platform and are looking to engage an experienced ShareDo Developer on a contract basis. This role will focus on configuration, workflow development, and optimisation of the ShareDo platform to support operational efficiency across legal teams. The initial engagement is 3 months with a strong likelihood of extension. Key Responsibilities Configure and develop solutions within the ShareDo platform to support legal case management workflows Design and implement workflow automations to streamline operational and client-facing processes Work closely with internal stakeholders and delivery teams to gather requirements and translate them into technical solutions Support ongoing platform enhancements, integrations, and performance improvements Provide technical input...
Outside Spy
Mar 18, 2026
Duration not stated
ADW Developer at Sanderson Government and Defence, Andover, £Contract Rate
Outside Spy Andover SP11, UK
ADW Developer CV: Maximum 3 pages, font size 11 Contract Rate: £450 per day (Outside IR35) Location: Andover, UK Travel: 2 days onsite with the client Clearance: SC Cleared candidates only Responsibilities Designed subject areas using RPD (Repository) design in Oracle Analytics. Designed, developed, and implemented Oracle Analytics Server (OAS) security including users, roles, and data-level security. Designed, developed, and implemented ODI (Oracle Data Integrator) mappings for ETL processes. Designed, developed, and implemented Data Warehouse solutions including data modelling and integration. Developed and implemented OAS reports and dashboards to support business analytics and reporting needs. Provided production support for existing live OAS, ODI, data warehouse objects. Analysed and resolved data, ETL, and reporting issues to ensure system stability. Performed performance tuning of RPD objects, ODI mappings, queries, and reports. Maintained and documented...
Outside Spy
Mar 18, 2026
Duration not stated
SC Cleared Oracle ADW Developer at Sanderson Government and Defence, Multiple Locations, £Contract Rate
Outside Spy United Kingdom
SC Cleared ADW Developer - £425/day Outside IR35 - Andover (Hybrid) We're looking for an SC Cleared ADW Developer to join a defence-related project delivering advanced analytics and data warehouse solutions. This is a contract role paying £425 per day (Outside IR35) with 2 days onsite in Andover . Candidates must hold active SC clearance and be available to start immediately. Key Details Rate: £425/day (Outside IR35) Location: Andover, UK Working Pattern: 2 days onsite with the client Clearance: Active SC clearance required Start: Immediate Important Only active SC cleared candidates will be considered Travel expenses will not be reimbursed Responsibilities Design subject areas using Oracle Analytics RPD Develop and implement Oracle Analytics Server (OAS) security (users, roles, data-level security) Build ODI (Oracle Data Integrator) mappings for ETL processes Deliver data warehouse solutions...
Outside Spy
Mar 18, 2026
6 Months or more
SC Cleared Oracle ADW Developer at Sanderson Government & Defence, Andover, 6 Months, £400-£425 per day
£400 - £425 per day
Outside Spy Andover, UK
SC Cleared ADW Developer - £425/day Outside IR35 - Andover (Hybrid) We're looking for an SC Cleared ADW Developer to join a defence-related project delivering advanced analytics and data warehouse solutions. This is a contract role paying £425 per day (Outside IR35) with 2 days onsite in Andover . Candidates must hold active SC clearance and be available to start immediately. Key Details Rate: £425/day (Outside IR35) Location: Andover, UK Working Pattern: 2 days onsite with the client Clearance: Active SC clearance required Start: Immediate Important Only active SC cleared candidates will be considered Travel expenses will not be reimbursed Responsibilities Design subject areas using Oracle Analytics RPD Develop and implement Oracle Analytics Server (OAS) security (users, roles, data-level security) Build ODI (Oracle Data Integrator) mappings for ETL processes Deliver data warehouse solutions including...
Outside Spy
Mar 18, 2026
Duration not stated
ADW Developer at Sanderson Government & Defence, Andover, £400-£450 per day
£400 - £450 per day
Outside Spy Andover, UK
ADW Developer CV: Maximum 3 pages, font size 11 Contract Rate: £450 per day (Outside IR35) Location: Andover, UK Travel: 2 days onsite with the client Clearance: SC Cleared candidates only Responsibilities Designed subject areas using RPD (Repository) design in Oracle Analytics. Designed, developed, and implemented Oracle Analytics Server (OAS) security including users, roles, and data-level security. Designed, developed, and implemented ODI (Oracle Data Integrator) mappings for ETL processes. Designed, developed, and implemented Data Warehouse solutions including data modelling and integration. Developed and implemented OAS reports and dashboards to support business analytics and reporting needs. Provided production support for existing live OAS, ODI, data warehouse objects. Analysed and resolved data, ETL, and reporting issues to ensure system stability. Performed performance tuning of RPD objects, ODI mappings, queries, and reports. Maintained and documented...
Outside Spy
Mar 18, 2026
Duration not stated
ADW Developer at Sanderson, Andover, £Contract Rate
Outside Spy Andover SP11, UK
ADW Developer CV: Maximum 3 pages, font size 11 Contract Rate: £450 per day (Outside IR35) Location: Andover, UK Travel: 2 days onsite with the client Clearance: SC Cleared candidates only Responsibilities Designed subject areas using RPD (Repository) design in Oracle Analytics. Designed, developed, and implemented Oracle Analytics Server (OAS) security including users, roles, and data-level security. Designed, developed, and implemented ODI (Oracle Data Integrator) mappings for ETL processes. Designed, developed, and implemented Data Warehouse solutions including data modelling and integration. Developed and implemented OAS reports and dashboards to support business analytics and reporting needs. Provided production support for existing live OAS, ODI, data warehouse objects. Analysed and resolved data, ETL, and reporting issues to ensure system stability. Performed performance tuning of RPD objects, ODI mappings, queries, and...
Outside Spy
Mar 17, 2026
Duration not stated
Full Stack Engineer at Circle Group, Multiple Locations, £Contract Rate
Outside Spy United Kingdom
Role: Full-Stack Engineer Salary/Rate: £250-300 per day outside IR35 Location: Mainly remote - occasional London visits Contract Duration: 12-months We are currently looking for a Full-Stack Engineer for our client, an independent research technology start-up. This Full-Stack Engineer role is mainly remote, with occasional visits to the London office, as required by the business. Candidates must be based in the UK and already have the right to work. There is no further flexibility with the on-site requirement. The contract for the Full-Stack Engineer position is for 12-months, with potential to extend, operating outside IR35. Essential skills/experience required: Proven previous experience as a full-stack engineer Python (Flask) React background Comfortable working in AWS-hosted environments (with EKS) Proficiency in Git-based development workflows Experience working independently and communicating effectively in distributed teams Desirable :...
Outside Spy
Mar 17, 2026
Duration not stated
Full Stack Engineer at Circle Recruitment, London, £Contract Rate
Outside Spy London, UK
Role: Full-Stack Engineer Salary/Rate: £250-300 per day outside IR35 Location: Mainly remote - occasional London visits Contract Duration: 12-months We are currently looking for a Full-Stack Engineer for our client, an independent research technology start-up. This Full-Stack Engineer role is mainly remote, with occasional visits to the London office, as required by the business. Candidates must be based in the UK and already have the right to work. There is no further flexibility with the on-site requirement. The contract for the Full-Stack Engineer position is for 12-months, with potential to extend, operating outside IR35. Essential skills/experience required: Proven previous experience as a full-stack engineer Python (Flask) React background Comfortable working in AWS-hosted environments (with EKS) Proficiency in Git-based development workflows Experience working independently and communicating...
Outside Spy
Mar 16, 2026
Duration not stated
Content Designer at Damia Group Ltd, Newcastle Upon Tyne, £Contract Rate
Outside Spy Newcastle upon Tyne, UK
Content Designer - £500-550pd DOE - Outside IR35 - 3 months+ Hybrid working in Newcastle ( 2 days on site every 2 weeks, rest remote) Please note: Due to the nature of this role, candidates must have prior Central Government experience and rate is dependant on experience. Looking for a meticulous and dependable Content Designer to support the delivery of high-quality, accessible digital content. While the role carries the title of Content Designer, the core responsibilities are more aligned with web content publishing-working closely with developers and subject matter experts (SMEs) to prepare, format, and publish content to a hand-coded website. This position differs from traditional content design roles in that it involves limited user research or structural rewriting. Instead, the focus is on ensuring that content provided by SMEs is implemented accurately, adheres to GDS guidelines, and meets WCAG 2.2 AA accessibility standards. Key Responsibilities Review and...
Outside Spy
Mar 16, 2026
Duration not stated
Senior Delivery Lead at Red Badger, Multiple Locations, £Contract Rate
Outside Spy United Kingdom
Freelancer Opportunity Joining an existing account / project Has run PI OR Quarterly Planning for complex organisations or organisations that are introducing it for the first time (Agile at scale) The role is to create templates, ensure people are completing their actions and producing work in the correct formats, meeting deadlines etc Ideally has done this in Banking / Finance (Part time) 50% ideally (will consider full time) - 2 days in person at client offices (Canary Wharf) 6 weeks, start date ASAP Day rate - Outside IR35 We bring together the best in strategic services, user experience and technical delivery using Lean and Agile processes. Founded in 2010 by Stuart, Cain and David, we help large organisations improve their speed to market whilst focusing on delivering value to their users and customers. We work with our clients to understand their problems and validate ideas in order to deliver improved process...
Outside Spy
Mar 16, 2026
6 Months or more
UKIC DV Cleared Java Developer | Outside IR35 at SR2 - Socially Responsible Recruitment, Gloucestershire, 6 Months, £600-£625 per day
£600 - £625 per day
Outside Spy Gloucestershire, UK
UKIC DV Cleared Java Developer | Outside IR35 We are working with a specialist consultancy supporting highly sensitive national security programmes. They are looking for a Java Developer with active UKIC clearance to join a secure programme delivering critical software capabilities within the UK intelligence environment. This role would suit a developer who is comfortable operating in secure, mission-critical environments and enjoys working on complex Back End systems that underpin high-impact government services. The Role You will join an established engineering team responsible for building and maintaining secure Back End services. Working in an agile environment, you will contribute to the design, development and improvement of scalable Java-based systems that support complex operational requirements. The work will involve collaborating with engineers, architects and stakeholders to deliver robust, secure and well-tested solutions within a highly regulated environment....
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