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Job Title: C# .NET Developer

Location: Bromley & London – Hybrid (3 days in office is essential)

Contract: 12 months with possible extension for one more year.

Rate: £700 – £750 inside umbrella.

Overview

We are seeking an experienced C# .NET Developer to develop, enhance, and support a suite of critical business applications built on modern Microsoft technologies, including .NET 6 and .NET 8.

The successful candidate will work within a globally distributed development team, collaborating with both technical and business stakeholders across the UK (London, Bromley, Camberley) and internationally (Singapore, India, New York, and Chicago). The role offers the opportunity to contribute to business-critical systems while working in a collaborative and supportive environment.

Key Responsibilities

• Design, develop, enhance, and maintain enterprise applications using C# and .NET technologies.
• Support and improve existing business-critical systems, ensuring stability, performance, and scalability.
• Work closely with business users, analysts, and technical teams to gather requirements and deliver solutions.
• Participate in the full software development lifecycle, including design, development, testing, deployment, and support.
• Collaborate with globally distributed development teams across multiple locations and time zones.
• Contribute to technical discussions, solution design, code reviews, and continuous improvement initiatives.
• Troubleshoot and resolve application, integration, and database-related issues.

Required Technical Skills

Core Development

• Strong experience with:
  • C# development
  • .NET 6.0 / .NET 8.0
  • .NET Core
  • .NET Framework 4.7+

Web & API Development

• Experience designing and developing Web Services, including:
  • REST APIs
  • SOAP Services
• Strong understanding of API design principles and documentation standards.
• ASP.NET MVC 5
• ASP.NET Web API 2

Front-End Development

• Angular (v2+)
• JavaScript

Data & Persistence

• Experience with ORM frameworks such as:
  • Entity Framework
  • NHibernate
  • Dapper
• Database development and support experience with:
  • Microsoft SQL Server (2008+)
  • IBM DB2

Key Competencies

• Strong analytical and problem-solving skills with excellent attention to detail.
• Ability to investigate, diagnose, and resolve complex technical issues.
• Excellent communication and stakeholder management skills.
• Comfortable working directly with both technical and non-technical colleagues.
• Effective team player with the ability to work independently when required.
• Proactive mindset with a strong interest in innovation, continuous improvement, and adoption of new technologies and ways of working.

Adecco is a disability-confident employer. It is important to us that we run an inclusive and accessible recruitment process to support candidates of all backgrounds and all abilities to apply. Adecco is committed to building a supportive environment for you to explore the next steps in your career. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

We use generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention.