Senior C# Developer - Morgan McKinley

Senior .NET/C# Developer Oracle to PostgreSQL Migration: Our client is embarking on a strategic transformation of a legacy enterprise platform, rebuilding a long-standing PHP and Oracle-based system into a .NET (C#) and PostgreSQL architecture. Seeking talented developers who are excited to work at the intersection of legacy systems, modern architecture and cutting-edge development tooling. Your Responsibilities: Re-engineer Oracle PL/SQL logic into performant and maintainable C# services. Design and build .NET components that interact with both PostgreSQL and legacy PHP systems. Work closely with BAs and stakeholders to ensure functional parity and identify areas for modernisation or optimisation. Contribute to the design and delivery of a hybrid system architecture supporting phased rollout. Leverage AI tools to assist with code analysis and migration. Participate in code reviews, contribute to testing strategies and support comprehensive documentation efforts. What You'll Bring: Experience developing in .NET/C#, particularly in backend and data access layers. Proven success migrating legacy systems, especially from Oracle to PostgreSQL or similar. Strong working knowledge of Oracle PL/SQL and the ability to translate procedural logic into C#. Solid experience with PostgreSQL, including handling dialect differences and performance tuning. Comfortable working in hybrid environments where legacy and modern platforms coexist. Familiarity with AI-enabled tools that accelerate development and migration tasks. Strong grasp of software architecture principles, design patterns, and integration techniques. Collaborative mindset with excellent communication skills. Nice to Have: Experience with legacy PHP platforms and their integration challenges. Familiarity with CI/CD pipelines and DevOps workflows. Exposure to microservices, domain-driven design or event-driven architecture. Background in agile delivery. Please note: This is an initial 6 month contract, deemed inside IR35 and predominantly remote working with the ability to attend the London office as and when required.

Location: London, GB

Posted Date: 7/12/2025