Senior Software Engineer - APIs & Integration (Azure & Kafka) at SR2 - Socially Responsible Recruitment, London, £500-£525 per day

Senior Software Engineer - APIs & Integration (Azure & Kafka)

Contract Length: 6 months Initial
Rate: £500-£525 per day
Location: Remote
IR35: Outside

We're supporting a major cloud transformation programme and are looking for an experienced API Architect to help modernise a critical enterprise platform.

This role is focused on transforming a large API estate, migrating services from on-premise infrastructure into Azure, and evolving a monolithic architecture into a modern, scalable, event-driven ecosystem.

This is a hands-on architecture role where you'll work closely with engineering teams to define architectural standards, guide implementation, and support the delivery of a long-term modernisation strategy.

You'll play a key role in:

• Leading the migration of business-critical APIs from on-premise environments into Azure
• Defining and driving API architecture across a complex technology landscape
• Decomposing a large API monolith into scalable, independently deployable services
• Introducing and embedding event-driven architecture principles
• Supporting the adoption of Kafka-based messaging and integration patterns
• Working closely with development teams to ensure architectural alignment and technical quality
• Helping establish best practices around scalability, resilience, security, and maintainability

• Proven experience operating as an API Architect, Solution Architect, or Senior Backend Architect
• Strong background in API design and integration architecture
• Experience delivering cloud migration and modernisation programmes
• Deep understanding of microservices and distributed systems
• Experience designing event-driven architectures
• Ability to balance strategic architecture with practical delivery support

We're currently validating the final stack, however strong experience in either of the following would be highly relevant:

• Java
• .NET/C#

Additional technologies include:

• Azure
• Kafka
• API Management
• Microservices
• Event-Driven Architecture
• Cloud-Native Platforms
• CI/CD Pipelines
• Distributed Systems

• API transformation programmes
• Monolith decomposition initiatives
• Enterprise integration architecture
• Large-scale cloud adoption programmes
• High-volume or mission-critical systems

• £500-£525 per day
• 6-month initial contract
• Strong extension potential
• Immediate interview process

This is an opportunity to shape the future architecture of a business-critical platform whilst driving a significant shift towards cloud-native, event-driven engineering practices.