Senior .NET Integration Developer Maidenhead - Hybrid (3 days on site and 2 from home) 50,000 - 70,000 + Holiday + Pension + Training + Private Health Plan Excellent opportunity for an experienced C# .NET looking to join a stock market listed business, renowned for their supportive culture and award-winning training opportunities.This company are a well-established, international, and industry-leading SaaS provider delivering innovative platform solutions to customers across the financial, telematics, and logistics sectors. They design, develop, and support secure and scalable systems that process high-value data for global partners.In this role you will own the development and maintenance of robust third-party integrations, helping to evolve the organisation''s integration framework. You will work across financial, telematics, and mapping APIs, ensuring solutions are secure, scalable, and aligned with modern cloud architecture. You will use your expertise in C#/.NET and modern APIs (REST, WebAPI, JSON, OAuth2) to build fault-tolerant, event-driven integrations, support customers and partners with API usage, and deliver clear, high-quality documentation while maintaining security, GDPR compliance, and operational reliability.You will work directly with clients to understand their integration requirements and translate them into secure, scalable solutions. Taking integration leadership, you will design and maintain well-documented financial and third-party integrations built