Senior Fullstack Developer (.NET + React)

The company is CSHARK Sp. z o.o., working with an international client in the FinTech industry. The project is dedicated to banks and financial institutions, involving a SaaS product platform and cloud-based architecture.

• Over 4 years of commercial programming experience with .NET, C#, React, and TypeScript (more back-end experience is also acceptable).
• Strong understanding of software architecture principles and backend design patterns such as dependency injection, repository, mediator, and factory.
• Exposure to cloud environments (Azure or AWS) and understanding of infrastructure and services.
• Fluency in English and Polish (minimum B2+).
• 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 and event replay.
• 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.

• Designing web solution architecture based on best practices, using microservices and cloud services.
• Developing within a SaaS product platform.
• Implementing new functionalities using .NET and React.
• Designing, developing, and maintaining APIs, services, and systems on a cloud-based platform.
• Building high-performance front-end and back-end solutions.
• Preparing tests and technical documentation.
• Being part of a SCRUM team that develops and delivers software solutions throughout the entire production lifecycle.