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Fullstack Developer .NET + React

CSHARK Sp. z o.o.nofluffjobspublished 11/02/2026
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Must-have:TypeScriptC#ReactAWSAzureDockerCloudFrontendBackendFullstackScrumMicroservicesFinTechSeniorRemote

We are looking for an experienced Fullstack Developer (.NET + React). We value direct communication and an open approach to problem-solving.

Currently, we are working on an application for our international client in the FinTech industry, dedicated to banks and financial institutions.

The project is initially planned for 3 months, with a possibility of extension. We are looking for candidates who are available to join the project immediately.

In Short

  • 100% REMOTELY or from one of our 2 offices 💰 Senior: 130 - 160 pln/h ☑️ B2B contract

Your Daily Missions

  • Designing web solution architecture based on best practices, using microservices and the 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.

Requirements

The Essentials We’re Seeking

  • Over 4 years of commercial programming experience with .NET, C#, React and TypeScript (but will be ok more experience in back-end).
  • Strong understanding of software architecture principles and backend design patterns (e.g., dependency injection, repository, mediator, factory).
  • Exposure to cloud environments (Azure or AWS) 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.

Must have: .NET, React, Microservices, Cloud, SaaS, Backend, Scrum, C#, TypeScript, Design Patterns, Azure, AWS, CQRS, Domain-driven design, DDD, Event Sourcing, Clean Architecture, PostgreSQL, ORM, Entity Framework, Cosmos DB, NoSQL, REST API, Docker