Back-End Developer (.Net 8.0)

Sienn Poland Sp. z o. o.; Wrocław; Remote; PLN 180,000 - 240,000; Full time

Job summary

Join a leading company specializing in online technology as a Backend Developer. You'll work on enhancing an accounting application for an international client, leveraging technologies like ASP .NET Core, .NET 8, and Azure. Enjoy a fully remote position with competitive compensation and numerous development opportunities.

Benefits

Attractive remuneration

100% remote work opportunity

International training and certifications

Medical package

Multisport card

Life insurance

Language courses

Modern office

Knowledge sharing sessions

Defined career paths and training budget

Qualifications

• Strong experience with ASP .NET Core and C# required.
• Commercial experience with .NET 8 expected.
• Familiarity with Azure services and REST APIs is important.

Responsibilities

• Build and modernize backend services using ASP .NET Core MVC.
• Participate in migration to Microsoft Azure.
• Ensure code quality and scalability.

Skills

ASP .NET Core

C#

REST API

MS SQL Server

Azure

Docker

English

Job description

We are SIENN Living Online Technology! Let’s grow with us!
Do you want to be a part of something meaningful? We are working on an international project in the financial sector for a Dutch Client specializing in audits, accounting, payroll, HR, and tax advisory.

Project Information:
We are supporting the development and modernization of an existing accounting application.

Role:
As a Backend Developer, you will:

• Build and modernize backend services using ASP .NET Core MVC and .NET 8.0

• Participate in migration to Microsoft Azure

• Ensure code quality and scalability

• Collaborate with international teams

Technology stack:

• ASP .Net Core MVC, .Net 8.0, C#

• Azure

• Entity Framework

• Git, MS SQL Server

What we offer:

Attractive remuneration: B2B 14 500 – 23 000PLN/month net (includes 26 days of paid days off)

100% remote work opportunity available

We care about our employees’ development and stability

Work in an international environment

International training and certifications (e.g., Microsoft MCP)

Continuous personal growth: defined career paths, additional training leave, and training budget

Medical package, Multisport card, life insurance, and language courses

Modern office

Knowledge sharing sessions: e.g., Agile Coffee/Agile Knowledge Sharing, Tech-Zone, Chillout Zone

A great workplace atmosphere!

• Strong experience with ASP .NET Core and C#

• Commercial experience with .NET 8

• Familiarity with Azure services

• REST API experience

• Solid knowledge of MS SQL Server

• Fluent in English (spoken and written)

Nice to have:

• Docker experience

• Experience in upgrading legacy systems