FullStack .NET + React Developer

Poland

Job Information

Industry

Financial Sector

Date Opened

10/30/2025

Job Type

Full time

City

Warsaw

State/Province

Masovian Voivodeship

Country

Poland

Zip/Postal Code

00-002

Job Description

We’re looking for an experienced FullStack .NET Developer to join a greenfield digital transformation project in the corporate banking sector.

You’ll help build a modern, high-performance system from scratch using .NET 6/8, React, Kafka, and microservices integrated with multiple enterprise platforms — a project that will have a long-term impact on thousands of users.

Responsibilities:

Build scalable backend features in .NET 6/8 and contribute to a microservices-based architecture
Develop clean, reusable components in React integrated with REST APIs
Implement and integrate REST/SOAP services and event-driven systems with Kafka
Work closely with analysts, architects, and business stakeholders on requirements and design
Participate in testing, deployment, and optimisation to ensure high system performance

Requirements

5+ years of experience in .NET development
Strong skills in .NET 6/8, REST, SOAP, SQL Server, Entity Framework
Hands-on experience with React
Familiarity with Kafka and distributed/microservices architecture
Understanding of enterprise system integration and APIs
Fluency in Polish and English (B2 level or higher)

Nice to have:
Experience in banking or financial systems
Knowledge of secure systems or mobile banking
Familiarity with DDD, event storming, or user story mapping
Experience working in Agile/SCRUM environments

Benefits

Competitive salary
Fully remote or hybrid model
Long-term B2B contract with a stable project pipeline
Comprehensive healthcare
Work in a multilingual, multinational, and multicultural environment on international projects