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Contract

Web Application Support Engineer (React, ASP.NET)

Pontoon
London
money-bag £400 - £416/day
Posted: 08 September 2026 (Today)
Closing date: 08 October 2026
Ref: 225581200

Web Application Support Engineer

Location: Canary Wharf, London - 3 days a week onsite expected.

Daily Rate: -416.00 Umbrella

Contract Length: Up to 2 years likely for strong candidates

Our client, a leading financial institution in the banking sector, is seeking a highly skilled Web Application Support Engineer to join their dynamic team. This long term role offers an excellent opportunity to contribute to the efficiency and reliability of web applications within a fast-paced environment.

Experience Needed:

  • Proven React, ASP.NET experience is essential
  • Oracle/SQL expertise is required
  • Proven experience in web application support, ideally within the financial or corporate settings.
  • Strong understanding of web technologies, including HTML, CSS, JavaScript, C# and relevant frameworks.
  • Familiarity with server environments and database management systems.
  • Excellent problem-solving skills and the ability to work under pressure.
  • Strong communication skills, with the ability to convey technical information to non-technical stakeholders.

Key Responsibilities:

  • Provide expert support for web applications, ensuring optimal performance and availability.
  • Troubleshoot and resolve issues related to web applications, collaborating with development teams as needed.
  • Monitor application performance and implement improvements based on user feedback and system analysis.
  • Assist in the deployment of application updates, ensuring minimal disruption to business operations.
  • Document technical issues and solutions to enhance knowledge sharing within the team.

This is a unique opportunity to work with a prestigious employer committed to innovation and excellence in the financialservices industry. Interested candidates are encouraged to apply promptly to be considered for this role.

Please note: Only candidates with the relevant experience and skills will be contacted.

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.

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