Azure Developer

Azure Cosmos DB Developer

💰 £420-440/day (Inside IR35) | 📍 London, UK (1-2 days onsite)

📅 6-Month Contract

We are seeking an experienced Azure Cosmos DB Developer to support the transformation of critical cloud-native applications and data engineering platforms within a highly regulated environment. As an Azure Cosmos DB Developer, you will be responsible for designing efficient NoSQL data models, developing high-performance Cosmos DB solutions, and implementing robust data pipelines. The role requires strong expertise in Azure Cosmos DB internals, Spark/PySpark development, performance optimisation, and cloud-native application engineering.

Key Responsibilities

• Develop cloud-native applications using Azure Cosmos DB
• Design scalable NoSQL data models aligned to application requirements
• Implement partitioning strategies, indexing policies, and consistency models
• Optimise queries and throughput consumption (RU management)
• Develop and support Cosmos DB Change Data Feed (CDF) integrations
• Design and implement PySpark data pipelines
• Build scalable data processing solutions on Microsoft Fabric
• Develop efficient distributed processing workloads using Spark
• Support integration between Cosmos DB and Spark environments
• Establish and maintain CI/CD pipelines using GitLab
• Develop automated testing frameworks and quality controls
• Create and maintain unit and integration tests using Pytest
• Support release automation and deployment processes
• Collaborate with architects and DevOps teams on microservices integration
• Support scalable cloud-native application design
• Ensure security, governance, and compliance standards are met
• Troubleshoot performance and scalability challenges across the platform

Essential Skills & Experience

• Strong hands-on Azure Cosmos DB experience
• Expertise in query optimisation and throughput management
• Deep understanding of Cosmos DB Change Data Feed (CDF)
• Experience integrating Cosmos DB with Spark workloads
• Strong PySpark and Apache Spark expertise
• Experience building distributed data processing solutions
• Hands-on experience with Pytest
• Strong understanding of partitioning, indexing, and consistency levels
• Experience with Git and CI/CD pipelines
• Strong analytical and problem-solving skills
• Excellent communication and stakeholder engagement skills

Desirable Skills

• C# / .NET Core development experience
• ASP.NET development experience
• Experience designing microservices architectures
• Financial services or regulated industry experience
• Azure cloud-native application development

Please apply with your CV and we'll be in touch. Thank you!