17 net developer jobs found in London, greater london

.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.

.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.

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...

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...

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...

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.

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...

Data Engineer/Data Analyst - Power BI Automation Contract: 6 Weeks Rate: Up to £500 per day (Outside IR35) Location: Hybrid - 2 days per week in London We're looking for an experienced Data Engineer/Data Analyst to support the automation and optimisation of a Power BI dashboard for a short-term engagement. This role will focus on building and improving the Back End data processes required to enable reliable, automated reporting and analytics. Working closely with a Power BI Developer , you'll assess the existing data landscape, design and implement ETL processes, and ensure the data models underpinning the dashboard are accurate, performant, and well governed. Key Responsibilities Assess and enhance the current data infrastructure to support automated data flows into Power BI. Develop and implement ETL processes to source, transform and load data efficiently. Design data pipelines and orchestration workflows to automate data retrieval and...

The Value of Active Minds About Jupiter Jupiter is one of the UK 's leading investment management companies with just under 500 employees and £50.4 billion worth of assets under management (as at 30th September 2025). Jupiter provides investment services to individual and institutional investors through mutual funds (UK unit trusts, Luxembourg SICAVs and Dublin OEICs), separately managed accounts and sub-advised funds. Jupiter has experienced a period of international growth with offices open in EMEA and APAC. The majority of our employees are based in our London office located just minutes from Victoria station which provides stair-free access from both the Underground 's Victoria line and National Rail platforms, as well as limited road crossings to the Jupiter office. Our London office was designed to encourage employees to live active, healthy lives with floor-to-ceiling windows that allow for greater natural light and the benefit of a private balcony,...

Senior Full Stack Developer | Public Sector | Outside IR35 Contract: Outside IR35 Rate: £450-500/day Duration: ASAP start, 6 months initially Location: Fully remote (UK-based only) Clearance: Must be eligible for SC Sector: UK Government/Public Sector experience essential I'm supporting a consultancy delivering digital services into the UK public sector and we're looking for a Senior Full Stack Developer to join the team on a contract basis. This is a hands-on senior role working across the full software development life cycle. You'll design, build, and maintain robust full stack applications within AWS, contributing to architectural decisions and ensuring solutions meet government standards for security, accessibility, and performance. You'll work closely with product, design, and engineering colleagues in an agile delivery environment. Essential Experience Strong hands-on experience with Java (Kotlin) Backend development - Node.js Front End -...

Tech Lead - Python/TypeScript/C#/React/Azure £650-£750 per day | Outside IR35 | 6 Month Contract | Remote (Occasional London Travel) I'm currently working with a leading financial services technology consultancy that is looking to bring in an experienced Tech Lead to support the delivery of modern software solutions within the pensions and investment space. This is a hands-on leadership role, splitting your time between full-stack engineering and leading a small team of senior developers. The role offers the opportunity to work on complex platforms within a highly collaborative environment while helping shape modern engineering practices including AI-assisted and agentic development workflows. The role You will lead a team of four experienced engineers while remaining actively involved in the development process. Alongside technical leadership, you will play a key role in delivery coordination, Agile ceremonies, and stakeholder engagement. You will also act as a key...

Position: App Developer Location: Vauxhall/Stratford Day Rate: £600 p.d Outside IR35 Must hold active DV clearance A central government department is looking for an experienced App Developer to join a high-security programme. This role requires working on-site 5 days per week in Vauxhall, moving later to Stratford later on in the project. Due to the nature of the work, candidates hold UKSV DV clearance. Key Skills & Experience Strong expertise in Python, Docker, Kubernetes, and Data Governance Experience working in air-gapped environments, including managing dependencies and build pipelines without Internet access Proven background building APIs for data enrichment services Orchestration & data pipeline experience with Prefect or Airflow, and K8s or Swarm Configuration and automation of business workflow tooling (eg, Jira) Hands-on experience with a range of databases and storage technologies: Elastic, Mongo, Cassandra, Redis, S3 Desirable Skills...

Contract Opportunity - Salesforce Test Lead Rate: Up to £500/day outside IR35 Contract Role for 12 months Location: UK/Hybrid (Occasional travel) We're looking for an experienced Salesforce Test Lead to join a large global Salesforce programme . This role requires a well-rounded testing leader who can take ownership of the end-to-end testing strategy and delivery across multiple streams. Key Responsibilities Lead the overall Salesforce testing strategy and execution across the programme Manage functional, integration, regression, and UAT testing across multiple environments Coordinate with developers, product teams, and business stakeholders to ensure high-quality releases Drive test planning, defect management, reporting, and quality assurance governance Ideal Experience Proven experience as a Salesforce Test Lead on large-scale programmes Strong understanding of Salesforce platform testing and release cycles Experience leading...

Role: Senior Mobile Automation Test Engineer Location: London/Hybrid (2-3 days onsite) Term: End of 2026 Rate: Neg Status: Outside IR35 We're seeking a Senior Mobile Automation Test Engineer to join a London-based asset management firm delivering secure, high-performance mobile applications within a regulated environment. You'll lead mobile automation strategy across iOS and Android and embed automation into CI/CD to support secure and continuous delivery. Key Responsibilities Perform detailed manual testing across iOS and Android applications Identify and reduce defect leakage across integrated mobile components Execute functional, regression, integration and API test scenarios Contribute to and maintain automation suites using WebdriverIO (WDIO) and Appium Develop BDD-style test scenarios using Cucumber Execute automated tests via Sauce Labs (or similar cloud platforms) Support integration of automated tests into CI/CD pipelines Collaborate...

The Value of Active Minds About Jupiter Jupiter is one of the UK 's leading investment management companies with just under 500 employees and £50.4 billion worth of assets under management (as at 30th September 2025). Jupiter provides investment services to individual and institutional investors through mutual funds (UK unit trusts, Luxembourg SICAVs and Dublin OEICs), separately managed accounts and sub-advised funds. Jupiter has experienced a period of international growth with offices open in EMEA and APAC. The majority of our employees are based in our London office located just minutes from Victoria station which provides stair-free access from both the Underground 's Victoria line and National Rail platforms, as well as limited road crossings to the Jupiter office. Our London office was designed to encourage employees to live active, healthy lives with floor-to-ceiling windows that allow for greater natural light and the benefit of a private balcony,...

The Value of Active Minds About Jupiter Jupiter is one of the UK 's leading investment management companies with just under 500 employees and £50.4 billion worth of assets under management (as at 30th September 2025). Jupiter provides investment services to individual and institutional investors through mutual funds (UK unit trusts, Luxembourg SICAVs and Dublin OEICs), separately managed accounts and sub-advised funds. Jupiter has experienced a period of international growth with offices open in EMEA and APAC. The majority of our employees are based in our London office located just minutes from Victoria station which provides stair-free access from both the Underground 's Victoria line and National Rail platforms, as well as limited road crossings to the Jupiter office. Our London office was designed to encourage employees to live active, healthy lives with floor-to-ceiling windows that allow for greater natural light and the benefit of a private balcony,...

C++ Software Engineer (Contract) – £300–£400/day – Outside IR35 You'll be working for a Fintech company as an experienced C++ Software Engineer. Joining the development team on a 9‑month contract (OUTSIDE IR35) . This role focuses entirely on modern C++ engineering within a high‑performance Linux environment. You’ll work across core C++ components, toolsets, and performance‑critical systems, collaborating with senior engineers to enhance and maintain a sophisticated technical product suite. The work is varied, technical, and ideal for someone who enjoys solving low‑level and high‑performance coding challenges. This position does not require prior experience in financial services or trading systems, but if you have it, then great. If not, we are happy for you to learn this on the job. Role Responsibilities Develop modern, production‑grade C++ features and components Work with multi‑threaded, high‑performance systems Contribute to design discussions, code...