Senior Backend Engineer (.NET, Azure, SQL Server)

Internetwork Expert; Województwo mazowieckie; On-site; PLN 60,000 - 90,000; Full time

Job summary

A technology services provider in Poland is seeking a senior backend engineer to design and support a .NET-based backend that processes sensitive data. The ideal candidate will have extensive experience in backend development, SQL Server optimization, and CI/CD practices with Azure DevOps. This role involves collaborating with frontend developers to create stable APIs and making pragmatic engineering decisions. A focus on production stability and data correctness is essential. Join our team to build impactful solutions in a supportive environment.

Qualifications

• Strong senior-level backend development experience with .NET.
• Proven experience supporting and operating production applications.
• Solid SQL Server expertise, including performance tuning and query optimization.
• Hands-on experience with Azure DevOps and CI/CD pipelines.
• Pragmatic mindset for adapting solutions to project realities.

Responsibilities

• Design, build, and maintain backend services for a production-grade system.
• Own and evolve SQL Server schemas and performance-critical paths.
• Build and maintain CI/CD pipelines in Azure DevOps.
• Integrate and process data from Azure DevOps for metrics generation.
• Support production applications and resolve incidents.

Skills

Backend development with .NET

Production application support

SQL Server performance tuning

CI/CD with Azure DevOps

Practical Azure cloud experience

Working with sensitive data

Tools

Azure DevOps

SQL Server

Azure

Angular

Job description

We are seeking a senior backend engineer. The role focuses on building, evolving, and operating a .NET-based backend that processes sensitive organizational data and derives meaningful metrics and relationship graphs from Azure DevOps sources. This is a hands‑on engineering role with strong emphasis on production stability, data correctness, and pragmatic decision‑making.

The engineer will work primarily on a .NET 9 backend with SQL Server, serving an Angular front end, and will be expected to contribute across development, CI/CD, and operational support. The environment values realism and adaptability over rigid adherence to theoretical patterns.

Primary Stack

• Backend: .NET 9
• Frontend: Angular
• Database: SQL Server
• Tooling: Azure DevOps (Repos, Boards, Pipelines)
• CI/CD: Azure DevOps Pipelines
• Cloud: Azure (practical, application‑level usage)

Core Responsibilities

• Design, build, and maintain backend services for a production‑grade employee productivity and ranking system
• Own and evolve SQL Server schemas, queries, and performance‑critical paths
• Build and maintain CI/CD pipelines in Azure DevOps for reliable delivery to production
• Integrate and process data from Azure DevOps to generate metrics, analytics, and connection graphs
• Support production applications, including troubleshooting, performance tuning, and incident resolution
• Ensure safe handling of sensitive employee and productivity data across logging, debugging, and operations
• Collaborate with frontend developers to deliver stable, well‑designed APIs
• Make pragmatic engineering decisions that balance correctness, maintainability, and delivery constraints

Required Experience and Profile

• Strong senior‑level backend development experience with .NET
• Proven experience supporting and operating production applications
• Solid SQL Server expertise, including performance tuning and query optimization
• Hands‑on experience with Azure DevOps and CI/CD pipelines
• Practical Azure cloud experience sufficient to reason about deployments and operational constraints
• Experience working with sensitive or confidential data in enterprise environments
• Pragmatic mindset: able to adapt solutions to project realities rather than blindly following patterns

Nice to Have

• Writing automated tests and understanding where they add the most value
• Familiarity with common architectural and design patterns, applied pragmatically
• Experience improving observability, diagnostics, and operational readiness
• Awareness of frontend consumption patterns and API usability considerations
• Willingness to challenge designs constructively and suggest simpler or more robust alternatives
• Experience integrating with Microsoft Graph, including working with Entra ID (Azure AD) backed organizational data (users, groups, hierarchies, permissions), understanding
• Graph API throttling, permissions models, and safe handling of directory and identity‑related data.

About Us

Established in 2011, Trinetix is a dynamic tech service provider supporting enterprise clients around the world.

Headquartered in Nashville, Tennessee, we have a global team of over 1,000 professionals and delivery centers across Europe, the United States, and Argentina. We partner with leading global brands, delivering innovative digital solutions across Fintech, Professional Services, Logistics, Healthcare, and Agriculture.

Our operations are driven by a strong business vision, a people‑first culture, and a commitment to responsible growth. We actively give back to the community through various CSR activities and adhere to international principles for sustainable development and business ethics.

To learn more about how we collect, process, and store your personal data, please review our Privacy Notice: https://www.trinetix.com/corporate-policies/privacy-notice