Senior Backend Engineer (.NET / Python / Azure) at Gramian… · Bulgaria

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.