Senior Backend Engineer (.NET/C#) @ Link Group

Link Group; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

A technology company is seeking an experienced Backend Engineer in Warsaw, Poland. The ideal candidate has over 7 years of backend development experience, strong knowledge of C#/.NET Core, SQL Server, and cloud platforms like AWS. You will be responsible for designing scalable APIs and ensuring high-performance backend services. This role involves collaboration with cross-functional teams and managing CI/CD pipelines.

Qualifications

• 7+ years of experience in backend development.
• Strong skills in C#/.NET Core, SQL Server, MongoDB.
• Experience with AWS or another cloud platform.

Responsibilities

• Building and maintaining APIs and backend services in .NET Core.
• Working with SQL Server and MongoDB for data modeling and optimization.
• Ensuring performance and stability through monitoring and automation.
• Supporting cross-functional teams and collaborating with frontend developers.
• Managing CI/CD pipelines and deployments.

Skills

C#/.NET Core

SQL Server

MongoDB

Redis

Kafka

AWS

CI/CD tools

Observability platforms

Good communication skills

Tools

GitHub Actions

Jenkins

Job description

We are looking for a skilled Backend Engineer with strong experience in C#/.NET Core and cloud technologies (preferably AWS). In this role, you will design and develop scalable APIs, work with relational and NoSQL databases, and contribute to reliable, high-performance backend services.

Responsibilities

• Building and maintaining APIs and backend services in .NET Core.
• Working with SQL Server and MongoDB for data modeling and optimization.
• Ensuring performance and stability through monitoring and automation.
• Supporting cross-functional teams and collaborating with frontend developers.
• Managing CI/CD pipelines and deployments (GitHub Actions, Jenkins).

Requirements

• 7+ years of experience in backend development.
• Strong skills in C#/.NET Core, SQL Server, MongoDB.
• Knowledge of Redis, Kafka, CI/CD tools, observability platforms (e.g., Datadog).
• Experience with AWS or another cloud platform.
• Good communication skills and ability to work in dynamic teams.
• Bonus: basic knowledge of Angular or React.