Senior Backend Engineer (.NET / Python / Azure)

About Gramian
Gramian Consultancy is a boutique consultancy specializing in IT professional services and engineering talent solutions. With a strong background in software engineering and leadership, we help companies build high-performing teams by matching them with professionals who truly fit their needs.
About the Role
Our client is a Big4 Consultancy group that works with leading financial institutions on AI-driven transformation, automation, advanced analytics, and financial crime prevention . Their are building a production-grade AI-assisted KYC / Customer Due Diligence platform for an international insurance environment.
We are looking for an experienced Backend / Full-Stack Engineer to build the services connecting the AI-driven CDD platform with enterprise systems. The role requires strong hands-on experience across C#/.NET and Python , with a focus on APIs, enterprise integrations, asynchronous workflows, containerization, Azure DevOps, and production reliability.
CONTRACT: B2B or B2C contract
COMMITMENT: Full-time, 3-4 months contract with possibility of extension or getting on new projects
LOCATIONS: Remote, EU-based candidates
START: ASAP
PROCESS: Initial qualification followed by client interviews
Responsibilities

- Build middleware APIs connecting enterprise applications, data platforms, and legacy systems.

- Develop and maintain ASP.NET Core Web APIs and Python services.

- Extend AI-driven service modules and connector frameworks.

- Implement reliable asynchronous workflows , callbacks, retries, and safe write-back mechanisms.

- Integrate with REST APIs, messaging systems, queues, databases, and enterprise platforms.

- Package and deploy services using Docker and CI/CD pipelines.

- Support deployments to Azure / Databricks-based environments.

- Write and maintain unit and integration tests .

- Troubleshoot issues found during testing and in production.

- Contribute to a business-critical platform where uptime, speed, and correct results are essential
Requirements

- Strong hands-on experience with C# / .NET and ASP.NET Core Web APIs .

- Practical experience with Python , ideally FastAPI or a comparable framework.

- Experience building and integrating REST APIs and enterprise services.

- Experience with messaging / queues and asynchronous integration patterns .

- Strong experience with Docker, Git, and Azure DevOps CI/CD .

- Experience writing unit and integration tests for production services.

- Ability to work across modern cloud services and legacy enterprise systems.

- Fluent English and ability to work remotely within the EU.