Senior .NET Developer

Your ITeams Sp. z o.o.; Polska; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Luxmed Gold Extended medical care

Multisport Plus

Job summary

Your ITeams Sp. z o.o. in Poland is seeking a Senior .NET Developer to join an engineering team delivering enterprise-grade web apps.

You will design, build and support solutions using modern .NET technologies, and collaborate with product and third-party teams for production systems and handovers. Responsibilities include end-to-end components, .NET Core 8, C#, EF, SQL Server, React/TypeScript, Azure DevOps pipelines, and leading technical discussions within Scrum teams while ensuring secure,

Qualifications

• At least 6 years of IT experience with 3+ in a similar role.
• Proven enterprise software delivery and full lifecycle experience.
• Expertise in .NET Core 8, C#, EF, SQL Server and frontend with React/TypeScript.
• Experience with Azure DevOps pipelines and deployments.
• Strong teamwork, code reviews, and technical debt management.

Responsibilities

• Design and implement end-to-end application components: data layer, business logic and UI.
• Develop and maintain enterprise web apps using .NET Core/8, C#, EF and SQL Server.
• Contribute to React/TypeScript SPAs and support CI/CD pipelines in Azure DevOps.
• Lead or provide technical guidance for development teams, including code reviews.
• Participate in full product lifecycles from requirements through delivery and support.
• Support deployment and operation on Windows/IIS and container platforms.
• Integrate apps with identity and document-processing systems (SAML/Entra ID).
• Work in Scrum teams and collaborate with third-party contractors for 3rd-line support.
• Support releases and incidents within a large-organization context.

Skills

.NET Core / 8

C#

Entity Framework

SQL Server

React

TypeScript

Azure DevOps

Hangfire

UML

Scrum

English (B2)

Tools

Hangfire

Windows / IIS

OpenShift

Nutanix

Docker / Containers

Job description

We are looking for a Senior .NET Developer to join a collaborative engineering team focused on delivering enterprise-grade web applications. The person in this role will design, build and support solutions using modern .NET technologies, participate in solution lifecycles, and work closely with product and third-party teams to maintain production systems and handle technical handovers.

Responsibilities

• Design and implement end-to-end application components: data layer, business logic and user interface.
• Develop and maintain enterprise web applications using .NET (Core / 8), C#, Entity Framework and SQL Server.
• Contribute to React/TypeScript single-page applications and support build/deploy pipelines in Azure DevOps.
• Lead or provide technical guidance for development teams, including code reviews and technical-debt management.
• Participate in full product lifecycles from requirements and design (UML) through delivery, testing and production support.
• Support deployment and operation on Windows/IIS and container or virtualised platforms (e.g., Nutanix, OpenShift); work with background-job frameworks and certificate/data protection features.
• Integrate applications with identity and document-management systems (e.g., SAML 2.0 / Entra ID, PDF/image processing).
• Work within Scrum teams and collaborate with third-party contractors during third-line support periods.
• Support release and incident processes in a large-organization context, including UAT and Change Advisory Board activities.

Qualifications

• At least 6 years of professional experience in IT, including a minimum of 3 years in a similar position.
• Proven experience delivering enterprise-level software and at least one complete solution lifecycle.
• Expertise in .NET development (Core / 8), C#, Entity Framework and SQL Server; experience with React and TypeScript for front-end work.
• Practical experience with Azure DevOps pipelines for build and deployment.
• Hands-on experience with deployment platforms (Windows/IIS, containers/virtualised platforms), background-job frameworks (e.g., Hangfire), and security scanning / penetration-test remediation.
• Experience integrating with SAML 2.0 / Entra ID and document-processing libraries; experience taking over and improving code delivered by external contractors.
• Comfortable supporting production systems in large organisations and collaborating with third-party development teams.
• Familiarity with UML and the ability to design applications and document technical solutions clearly.
• Experience working in Scrum development teams and the ability to lead technical discussions and teams.
• English language proficiency at B2 level minimum
• Unique TEAL culture, relationship- and respect-driven community, non-corporate atmosphere.
• Agile approach and no bureaucracy.
• Outstanding integration trips to various places in Europe.
• Activities to support your well-being and health.
• Luxmed Gold Extended medical care and Multisport Plus benefit.