Senior .NET Engineer - SmartGrants

emagine; Polska; Remote; PLN 180,000 - 260,000; Full time

Job summary

emagine seeks a senior .NET engineer based in Poland to stabilise the solution, reduce debt, and raise engineering standards. You will influence architecture, quality, and priorities while owning critical improvements and ensuring business continuity.

You will collaborate with technical and business stakeholders, prioritise work by risk and value, and drive CI/CD, observability, and robust testing practices across the stack.

Qualifications

• Strong hands-on experience building and maintaining backend apps using C# and .NET / ASP.NET Core.
• Experience modernising legacy apps without disrupting operations.
• Solid knowledge of relational databases, SQL and Entity Framework.

Responsibilities

• Build a strong understanding of the existing codebase, architecture and integrations.
• Create and drive a risk-based technical debt roadmap focused on stability and maintainability through 2030.
• Modernise the .NET application and key dependencies incrementally while protecting business continuity.

Skills

C#

.NET

ASP.NET Core

SQL

Entity Framework

APIs

Azure

CI/CD

Logging/Monitoring

Debugging/Fixing defects

Problem solving

Communication

Education

Computer Science / Software Engineering degree

Tools

Azure App Service

Azure SQL

Bicep

ARM templates

Git / Version Control

Job description

Location: Poland
Working mode: Remote (with occasional business travel)
Language: English
We are looking for a senior .NET engineer based in Poland. Working closely with technical and business stakeholders, you will take an active role in stabilising the solution, reducing technical debt and improving the engineering practices needed for dependable long-term operation. The role offers significant ownership and the opportunity to influence architecture, quality standards and technical priorities.

Your key responsibilities include the following:

• Build a strong understanding of the existing codebase, architecture, integrations and business-critical workflows
• Create and drive a risk-based technical debt roadmap focused on stability, security, maintainability and supportability through 2030
• 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

What We Are Looking For

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:

• Strong hands-on experience developing and maintaining backend applications using C# and .NET / ASP.NET Core
• Experience modernising legacy or business-critical applications without disrupting ongoing operations
• Solid knowledge of relational databases, SQL and Entity Framework
• Experience designing, maintaining and troubleshooting enterprise integrations and APIs
• Practical experience with Microsoft Azure, including application hosting, monitoring and cloud operations
• Experience with unit, integration and regression testing and improving test coverage in existing systems
• Good understanding of secure coding, dependency management and software lifecycle risks
• Experience with CI/CD, source control and modern software quality practices
• Strong analytical and problem-solving skills, with the ability to turn findings into pragmatic improvement plans
• Ability to work independently with a high degree of ownership and accountability
• Excellent communication skills and confidence working directly with technical and business stakeholders

Nice to have:

• Vue.js or another modern JavaScript framework
• Azure App Service, Azure SQL and Infrastructure as Code such as Bicep or ARM templates
• Observability, structured logging, alerting and production support
• Financial, invoicing or payment workflows
• SAP or other ERP integrations
• Experience from clinical development, life sciences or another regulated enterprise environment