Full-Stack Developer (.NET + React)

Quick Facts

• Role: Fullstack Developer working on a FinTech SaaS platform
• Work model: 100% remote or from one of two offices
• Duration: 3 months initially, with possibility of extension
• Contract: B2B
• Rate (Senior): 130–160 PLN/h

Description

You will design and develop a cloud-based web solution using microservices for banks and financial institutions. The role focuses on building features in a SaaS platform, implementing functionality with .NET and React, and creating/maintaining APIs and services. You’ll work end-to-end with a SCRUM team across the production lifecycle.

Responsibilities

• Design web solution architecture using microservices and cloud services
• Develop within a SaaS product platform
• Implement new functionalities using .NET and React
• Design, develop, and maintain cloud-based APIs, services, and systems
• Build high-performance front-end and back-end solutions
• Prepare tests and technical documentation
• Deliver software throughout the entire production lifecycle in a SCRUM team

Requirements

• 4+ years of commercial programming experience with .NET, C#, React, and TypeScript (back-end experience preferred if above)
• Strong software architecture knowledge and backend design patterns (dependency injection, repository, mediator, factory)
• Exposure to Azure or AWS and understanding of infrastructure/services
• English and Polish fluency (minimum B2+)
• Hands-on CQRS and Domain-Driven Design (aggregates, entities, value objects, bounded contexts)
• Understanding of event sourcing (event stores, event replay, immutable domain events)
• Solid clean architecture knowledge and separation of concerns
• Experience with PostgreSQL and modern ORM frameworks (e.g., Entity Framework)
• Exposure to CosmosDB or similar NoSQL/document databases
• Experience designing and consuming RESTful APIs
• Familiarity with Docker for local development and deployments

Benefits

• 100% remote option
• Initial 3-month project with potential extension
• B2B contract