Senior Dotnet Developer

Senior Software Engineer | .NET | AWS | Kafka | London | Hybrid | £100-£110kWe're partnering with a high-growth Series B SaaS business that's transforming regulatory technology through a modern, cloud-native platform.As part of a major re-platforming initiative, they're looking for a Senior Software Engineer to help build the next generation of their core products using .NET, AWS, Kafka, and modern software architecture.This is an opportunity to join a collaborative engineering team where you'll have real ownership, work with the latest technologies, and help shape the future of a rapidly scaling platform. Working alongside Product, DevOps, Data Engineering, QA, and Regulatory teams, you'll deliver high-quality software that powers mission-critical services for global financial institutions.What You'll Be DoingBuilding scalable backend services using C# and .NETDeveloping within an event-driven architecture using KafkaWriting clean, maintainable, well-tested codeParticipating in code reviews and driving engineering best practicesBuilding resilient, observable, cloud-native services on AWSUsing AI-assisted development tools to improve delivery and code qualityCollaborating across engineering and product teams to solve complex technical challengesWhat We're Looking ForStrong commercial experience with C# and .NETExperience building event-driven, service-based applicationsKnowledge of DDD and modern software architectureStrong engineering fundamentals including testing, CI/CD and observabilityHands-on experience with AWSExperience using AI development tools such as Copilot, Claude Code or CodexA proactive mindset with ownership of delivery and software qualityNice to HaveExperience modernising legacy platformsFinTech, RegTech or other regulated industry experienceExperience with large-scale SaaS platformsWhy Apply?Join a fast-growing, private equity-backed SaaS businessPlay a key role in a major platform transformationWork in an engineering team actively embracing AI-assisted developmentExcellent opportunities for progression in a collaborative, high-performing environmentFlexible hybrid working, strong benefits, and a culture focused on ownership, innovation and continuous improvementSenior Software Engineer | .NET | AWS | Kafka | London | Hybrid | £100-£100k