Senior Full Stack Developer - C#/Azure /Kafka

About the role

Responsibilities

• Design, build, and maintain event adapters and services connecting source systems to an event streaming platform.
• Develop production-quality C# and Azure applications and services.
• Build integration logic across APIs, services, data sources, and event streams.
• Develop resilient and performant solutions for time-sensitive data.
• Work with Kafka producers, consumers, and event-driven architectures.
• Collaborate with the wider data platform engineering organization.
• Establish engineering patterns and practices for a new event-driven capability.
• Troubleshoot issues across application and integration layers.
• Make pragmatic architectural and engineering decisions.
• Contribute to a high-quality collaborative engineering culture.

About you

• Strong commercial software engineering experience with C# as the primary language.
• Hands-on experience building services, integrations, or adapters between systems.
• Strong experience developing cloud-native applications on Microsoft Azure.
• Experience with Apache Kafka or comparable event-driven or event-streaming technologies.
• Good understanding of APIs, service integration, and distributed systems.
• Experience building resilient and reliable services for business-critical environments.
• Ability to work autonomously and make sound engineering decisions with limited oversight.
• Strong communication and collaboration skills within a small engineering team.
• A pragmatic approach focused on robust solutions rather than unnecessary complexity.

Preferred experience

• Experience in energy trading, financial services, trading platforms, or other highly time-sensitive environments.
• Experience with trading platforms, market or exchange data, low-latency data, Azure data platform technologies, or establishing new engineering capabilities.

Core technologies

• C# and Microsoft Azure.
• Apache Kafka and event streaming.
• REST APIs and service integration.
• Event-driven architecture and distributed systems.
• Full-stack software development.

Location and work arrangement

• The role is based in London and is described as hybrid, typically involving one to two days per week in an office or client site.
• The posting also describes the engagement as fully remote and flexible.

Contract and rate

• This is a six-month rolling contract with a daily rate of £600-£650 outside IR35.
• The engagement is intended to have clear deliverables and may be extended.

About Appvia

Why join Appvia

• The engagement offers work on modern cloud platforms, a focused delivery scope, a fast interview process, and a quick start.