Senior Fullstack Engineer (React/.NET) - Remote & Cloud SaaS

CSHARK; Wrocław; Hybrid; PLN 180,000 - 280,000; Full time

Job summary

CSHARK is seeking a highly skilled Fullstack Developer (React+.NET) to design and implement scalable software for an international fintech client. The role emphasizes cloud-based architectures, microservices, and robust API development while collaborating in a remote-first setup.

Key requirements include 4+ years with .NET, C#, React and TypeScript, plus experience with CQRS, DDD, and Docker. English and Polish fluency are essential, with a focus on delivering high-quality, maintainable code.

Qualifications

• Over 4 years of commercial programming experience with .NET, C#, React and TypeScript.
• Strong software architecture principles and backend design patterns.
• Experience with cloud environments (Azure or AWS) and infrastructure/services.
• Fluency in English and Polish (minimum B2+).
• Hands-on experience with CQRS and Domain-Driven Design (DDD).
• Understanding of Event Sourcing concepts.
• Knowledge of clean architecture and separation of concerns.
• Experience designing and consuming RESTful APIs.
• Familiarity with Docker for local development and deployments.

Responsibilities

• 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.

Skills

React

TypeScript

C#

.NET

PostgreSQL

Docker

REST APIs

CQRS

DDD

Clean Architecture

English

Polish

Entity Framework

Tools

Entity Framework

Job description

CSHARK is seeking a highly skilled Fullstack Developer (React+.NET) to design and implement scalable software for an international fintech client. The role emphasizes cloud-based architectures, microservices, and robust API development while collaborating in a remote-first setup.

Key requirements include 4+ years with .NET, C#, React and TypeScript, plus experience with CQRS, DDD, and Docker. English and Polish fluency are essential, with a focus on delivering high-quality, maintainable code.