Senior Fullstack Developer (.NET+React)

• Tech industry

• Rate: up to 137 zł/h

• Start in December 2026

• Remote work

Summary: This role is crucial for the development of a FinTech application tailored for international banks and financial institutions, focusing on creating robust web solutions to enhance financial services.

Responsibilities:

• Designing web solution architecture based on best practices, utilizing 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.

Must Haves:

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

• Strong understanding of software architecture principles and backend design patterns.

• Exposure to cloud environments (Azure or AWS).

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

• Hands-on experience with CQRS and Domain-Driven Design (DDD).

• Understanding of Event Sourcing concepts.

• Solid knowledge of clean architecture and separation of concerns.

• Experience with PostgreSQL and modern ORM frameworks.

• Exposure to CosmosDB or similar NoSQL/document databases.

• Experience designing and consuming RESTful APIs.

• Familiarity with Docker for local development and deployments.

Nice to Haves:

• Experience with additional cloud platforms.

• Knowledge of front-end frameworks beyond React.

• Certifications in relevant technologies.