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Backend developer

just-IT GmbHLondonreedpublished 11/10/2026
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Must-have:C#AWSCloudBackendSeniorLeadHybrid

Backend Developer - Job Summary

Role: Backend Developer

6month fixed term position

Reporting to: Development Team Lead

Location: London (Hybrid) 2 days a week in December 1 day a month thereafter

Overview

My client is seeking a Backend Developer to support the modernization of its digital platforms and cloud infrastructure. The role focuses on maintaining and enhancing backend systems, supporting the migration from the legacy Tridion CRM platform to Salesforce, and developing scalable cloud-based solutions within AWS.

Key Responsibilities

  • Support the decommissioning of the legacy Tridion CRM system.
  • Develop, maintain, and troubleshoot applications built in C# and .NET Framework 4.7.2.
  • Build and maintain RESTful APIs and backend services.
  • Support integrations between Salesforce and internal systems.
  • Maintain AWS serverless solutions using Lambda and API Gateway.
  • Work with Microsoft SQL Server, including queries, stored procedures, and data migration activities.
  • Collaborate with developers, testers, analysts, and infrastructure teams in an Agile environment.

Essential Skills & Experience

  • Strong experience with C# and .NET Framework.
  • Experience with AWS Lambda and API Gateway.
  • Solid knowledge of SQL Server.
  • Experience developing and integrating REST APIs.
  • Understanding of SOLID principles and object-oriented programming.
  • Strong troubleshooting and analytical skills.
  • Good communication and teamwork abilities.

Desirable Experience

  • Salesforce API integrations.
  • Working with legacy CRM/CMS platforms, especially Tridion.
  • Data migration and application decommissioning projects.

Key Challenges

  • Understanding and maintaining an established legacy codebase.
  • Supporting the transition from Tridion to Salesforce with minimal business disruption.
  • Identifying undocumented integrations and dependencies.
  • Ensuring data integrity throughout migration activities.
  • Balancing project work with ongoing support responsibilities.

Ideal Candidate Profile

This role would suit a mid-to-senior Backend Developer with strong C# experience who enjoys working on system modernization, cloud technologies, and complex integration projects. Experience supporting legacy systems and business-critical migrations would be highly valuable.

If you have strong C# experience spanning across 3- 4 years then apply now for a quick conversation as the client needs an immediate starter.