Senior .NET Engineer

Softeq; Warszawa; On-site; PLN 210,000 - 270,000; Full time

Job summary

Softeq in Warsaw, Poland is seeking a senior .NET backend developer to join a growing team. You will design and develop complex .NET applications using modern patterns (microservices, clean architecture), write clean C# code, and contribute to code reviews and system improvements.

Requirements include 5+ years of .NET/C# backend experience, RESTful APIs, asynchronous programming, strong SOLID knowledge, and database experience (SQL Server, PostgreSQL, MongoDB).

Qualifications

• 5+ years of backend .NET/C# experience.
• 1
• Experience with Core, RESTful APIs and asynchronous programming.
• Strong knowledge of SOLID, patterns and design principles.
• Experience with relational and NoSQL databases.
• Familiarity with containerization and cloud platforms.
• Git and Agile methodologies.

Responsibilities

• Design and develop complex .NET applications using modern patterns.
• Write clean, testable C# code and perform code reviews.
• Contribute to CI/CD pipelines and IaC improvements.
• Stay updated on emerging technologies and propose adoption.
• Work with SQL/NoSQL databases.
• Use Docker and cloud platforms (Azure/AWS/GCP).

Skills

NET/C# backend

RESTful APIs

Async programming

Software architecture

Git & Agile

DevOps & CI/CD

Docker

Cloud platforms (Azure AWS GCP)

Tools

Docker

Azure

AWS

GCP

Job description

Established in 1997, Softeq was built from the ground up to specialize in new product development and R&D, tackling the most difficult problems in the tech sphere. Now we’ve expanded to offer early-stage innovation and ideation plus digital transformation business consulting. Our superpower is to deliver all of this under one roof on a global scale. So let’s get started and build a better future together!

We are expecting to grow our team and begin new projects in the next 1-2 months, As such, we’re starting to accept resumes and process chosen candidates.

Your daily routine:

• Design and development of complex .NET applications using best practices and modern architecture patterns (e.g., microservices, clean architecture);
• Write clean, efficient, and testable C# code, and perform code reviews to ensure high standards;
• Contribute to continuous improvement of development processes and DevOps practices (CI/CD pipelines, infrastructure as code);
• Stay updated on emerging technologies and propose their adoption when relevant to the business.
• 5+ years of professional experience with .NET and C# in backend development roles;
• Proven experience with Core, RESTful API development, and asynchronous programming;
• Strong knowledge of software architecture, design patterns, and SOLID principles.
• Experience with relational and/or NoSQL databases (e.g., SQL Server, PostgreSQL, MongoDB);
• Familiarity with containerization (Docker) and cloud platforms (Azure, AWS, or GCP);
• Hands-on experience with version control (Git) and agile methodologies (Scrum/Kanban);

A bonus would be:

• Experience with front-end technologies (e.g., Angular, React, or Blazor);
• Relevant certifications in .NET, Azure, AWS or solution architecture.

Softeq communicates only from @ softeq.com email addresses. We never request payments or fees for any reason during hiring — including trainings or courses to be completed, equipment, onboarding, or background checks — and we will not ask for banking information, cryptocurrency or gift cards. If you receive a message from any other domain or requesting payment, do not respond and report it to [e-mail]