Data Migration Developer with .NET

We are looking for a Senior Data Migration Developer with .NET to join our engineering team and help build a cutting-edge solution for our client, a company that designs, builds, and operates advanced registry systems.

In this role, you will focus on designing and implementing robust data migration and backend processes, ensuring high performance, scalability, and data integrity.

You will work on a project leveraging modern architectures and technologies such as C#, .NET 9, modular monolith, DDD, CQRS, Event Sourcing and Azure.

IN SHORT:

🌎 100% remote or from the office (Wrocław, Bielsko-Biała) - You choose!

💰 120 - 150 PLN/h

☑️ B2B contract

💻 >4 years of commercial programming experience

Your Daily Missions

• Designing, implementing, and optimizing backend services for data migration and transformation.

• Building clean, scalable, and maintainable solutions aligned with CQRS and DDD principles.

• Developing tools and scripts for data import/export, validation, and reconciliation.

• Collaborating closely with cross-functional teams to ensure smooth data migration and integration with existing systems.

• Writing clear, testable, and well-documented code with strong attention to performance and reliability.

• Participating in code reviews and contributing to architectural and design discussions.

• Supporting other developers and sharing knowledge within the team.

• Working in an Agile SCRUM environment, taking part in sprint planning, stand-ups, and retrospectives.

The Essentials We're Seeking

• Over 4 years of commercial programming experience with .NET, C#.

• Strong understanding of software architecture principles and backend design patterns (e.g., dependency injection, repository, mediator, factory).

• Exposure to cloud environments (ideally Azure) and understanding of infrastructure and services.

• Fluency in English and Polish (minimum B2+) - a must.

• Hands-on experience with CQRS and Domain-Driven Design (DDD), including aggregates, entities, value objects, and bounded contexts.

• Understanding of Event Sourcing concepts - including event stores, event replay, and how to model state changes as immutable domain events.

• Solid knowledge of clean architecture and separation of concerns.

• Experience with PostgreSQL and modern ORM frameworks (e.g. Entity Framework or equivalent).

• Exposure to CosmosDB or similar NoSQL/document databases.

• Experience designing and consuming RESTful APIs.

• Familiarity with Docker for local development and deployments.

Reasons Why You Would Enjoy Working With Us

• We work in the latest technologies and with international clients, and our projects are polished from < to /> - learn about some of the projects we have completed.

• We organize TechTalks, meet-ups and create guilds where we exchange knowledge - you can learn a lot from your teammates.

• We have a close-knit team and we make sure to have regular integrations - we often go out to celebrate together.

• You can work remotely or choose to work from our offices in Wroclaw or Bielsko-Biala. However, we count on your openness to occasionally visit the office for team meetings or client visits, or possible occasional trips to the client's headquarters.

• You can adjust your working hours to suit your needs, starting your day between 7:00 and 10:00 am.

• You can work with great specialists in their fields who also have a sense of humor and other after-hours hobbies. It is the people who create the unique atmosphere and relaxed atmosphere at CSHARK.

• We have a flat structure - we are not a corporation and don't want to be one 🙃.

• We offer bonuses for employee referrals (from 3000 PLN to 7000 PLN).

• We organize remote English classes and provide access to the company library. You can also become an author/author of articles published on our technical blog - https://cshark.com/blog/.