Professional / Senior C# Developer

Avacone

London, England, United Kingdom permanent

Posted: February 27, 2026

Job Description

Role Overview

We are an established IT services company delivering technology solutions to clients in the banking and financial services sector. We are looking for a Professional / Senior C# Developer to design, develop, and maintain high-quality software solutions for a major banking client.

This role is hands-on and delivery-focused, operating within a regulated banking environment while remaining part of a collaborative, engineering-led IT organisation.

Key Responsibilities

• Design, develop, and maintain applications using C# and .NET (.NET Core / .NET 6+)
• Contribute to solution design in collaboration with senior and lead developers
• Build and consume RESTful APIs and backend services
• Write clean, maintainable, and well-tested code
• Participate in code reviews and technical discussions
• Ensure adherence to security, compliance, and quality standards required by banking clients
• Work closely with QA, DevOps, and business stakeholders
• Support production systems and contribute to issue resolution when required

Requirements:
Required Skills and Experience

• Strong commercial experience with C# and the .NET platform
• Solid understanding of object-oriented programming and clean code principles
• Experience developing enterprise or large-scale applications
• Good knowledge of relational databases (e.g. SQL Server, PostgreSQL, Oracle)
• Experience building and consuming RESTful services
• Familiarity with version control systems (Git) and CI/CD pipelines
• Comfortable working in regulated or security-conscious environments
• Strong analytical and problem-solving skills

Nice to Have

• Previous experience working in banking or financial services projects
• Exposure to cloud platforms (Azure preferred)
• Experience with automated testing frameworks
• Familiarity with microservices or distributed systems
• Experience working in agile delivery teams

Benefits:
What We Offer

• Competitive salary and benefits package
• Hybrid working model with London as primary client location
• Opportunity to work on complex, business-critical banking systems
• Supportive engineering culture focused on quality and continuous improvement
• Clear development path toward senior technical or lead roles

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