.NET Software Engineer

Project overview

This contract role is for a senior.NET engineer supporting SmartGrants, a business-critical clinical trial application for a pharmaceutical client, with a focus on reliable operation through 2030. The core requirements are hands-on C#/.NET and ASP.NET Core development, SQL and Entity Framework, enterprise APIs and integrations, Azure, automated testing, CI/CD, and maintaining or modernising established systems safely.

Vue.js or another JavaScript framework, Azure App Service and Azure SQL, Infrastructure as Code, observability, financial workflows, ERP integrations, and regulated-industry experience are useful additions. The structured input specifies 5–10 years of experience; the description asks for substantial experience but gives no numeric range. The structured location is Europe, while the description says the engineer should be based in Poland; contract is specified, but the work mode is not.

Responsibilities

• 🔹 For our Client from pharmaceutical industry we are looking for Senior.Net Engineer🔹
• ✔️Your key responsibilities include the following
• Build a strong understanding of the existing codebase, architecture, integrations and business-critical workflows
• Modernise the.NET application and key dependencies in pragmatic, incremental steps while protecting business continuity
• Diagnose and resolve production issues, recurring defects, performance bottlenecks and integration failures
• Improve automated testing, code quality, logging, monitoring and operational documentation
• Strengthen CI/CD, deployment practices, environment consistency and safe rollback approaches
• Document key design decisions, interfaces, runbooks and critical business logic, and share knowledge across the team
• Work with business and technical stakeholders to prioritise improvements according to operational risk and business value
• We are seeking a candidate with an educational background in Computer Science, Software Development or Engineering, as well as substantial experience in several of the following areas
• Experience modernising legacy or business-critical applications without disrupting ongoing operations
• Solid knowledge of relational databases, SQL and Entity Framework

Requirements

• Hands-on backend development and maintenance with C# and.NET
• ASP.NET Core
• Relational databases and SQL
• Entity Framework
• Designing, maintaining, and troubleshooting APIs and enterprise integrations
• Microsoft Azure application hosting, monitoring, and cloud operations
• Unit, integration, and regression testing; improving coverage in existing systems
• CI/CD, source control, and software quality practices
• Modernising legacy or business-critical applications while protecting ongoing operations
• Secure coding and dependency management

Project details

• Start: flexible
• Remote: remote
• Location: Europe, GB