Senior Full Stack .NET Engineer • £75,000 – £90,000 share options • London | Hybrid working (2–3 days office) Our client is a fast-growing payments technology company who are transforming their sector. Due to continued platform growth and global demand for their technology, they are expanding their engineering team with a Senior Full Stack .NET Engineer who can play a pivotal role in shaping the next generation of payment products and lead the development for a range of new features. This role is ideal for a Senior .NET engineer who thrives within a scale-up environment and enjoys taking ownership for their work. Our Fintech client delivers innovative digital payment solutions that simplify complex compensation processes, while improving customer experience (the product is B2B2C). With strong investor backing and global partners already using the platform, this is an opportunity to join a scaling technology business where your ideas, technical leadership, and product thinking will directly influence future innovation. The Senior Full Stack .NET Engineer will design and deliver scalable cloud-based applications, helping turn innovative product ideas into robust solutions that power seamless digital payment journeys for customers worldwide. Role Highlights Design and build cloud-native .NET Core microservices and applications Develop API-first integrations with payment processors and partner platforms Create scalable services across backend systems and cloud infrastructure Contribute to product innovation and new feature development You Will Need 5 years software engineering experience within modern development environments Strong expertise in .NET Core (C#), Microsoft Azure services, Frontend (ideally Angular) and SQL Server. Experience integrating payment platforms or financial APIs– Experience working with event-driven systems, messaging, and secure authentication Why You’ll Love It Competitive salary with share option potential Opportunity to influence product strategy within a scaling fintech Work closely with senior leadership including the CTO and CEO Exposure to global travel and aviation technology partnerships Collaborative environment where innovation and ownership are encouraged If you have in-depth Microsoft Software Engineering experience (.NET, Azure, SQL, Angular) and enjoy working within a fast-paced scale-up environment, please apply with a copy of your CV ASAP.