Senior Full Stack Developer React & .NET Core

  About the Role 

We are seeking a highly experienced Senior Full Stack Developer with deep expertise in React on the frontend and C# .NET Core on the backend. The ideal candidate will have substantial hands-on experience developing scalable applications, strong exposure to cloud-native architectures, and a solid understanding of capital markets—particularly in credit risk and market risk domains. Experience with Python (pyspark) for data-driven workflows and a strong command of CI/CD, microservices, and event-driven architectures is essential. 

Required Skills & Experience 

Domain Knowledge 

• Understanding of capital markets, specifically:  
• Credit risk (PD, LGD, EAD, credit exposure modeling, counterparty risk).  
• Market risk (VaR, sensitivities, stress testing, pricing concepts).  
• Familiarity with regulatory frameworks (e.g., Basel, FRTB, IFRS9) is a strong advantage.  

Offer: 

• Location: Poland, remote + equipment pick up in Warsaw/Wrocław  
• Zatrudnienie: przez apreel na zasadach B2B  
• Start: asap  
• Rate: up to 155 zł netto/ h  

Codzienne zadania

• Design, develop, and maintain full stack applications using React, C#.NET Core, and supporting technologies.  
• Build high-performance backend services, RESTful APIs, and microservices with focus on scalability, maintainability, and resilience.  
• Develop responsive, modular, and accessible UI components using React and modern JS/TS patterns.  
• Collaborate closely with business stakeholders and risk domain experts to deliver solutions in credit risk, market risk, and related capital markets functions.  
• Work with Python (pyspark) for data transformation, data pipelines, and analytics workflows.  
• Develop, optimize, and maintain Power BI dashboards, data models, and analytical reports for business users.  
• Implement and optimize CI/CD pipelines, ensuring robust automated testing, deployment, and monitoring.  
• Architect and contribute to event-driven and distributed system designs using technologies such as Kafka, Event Hub, or similar.  
• Drive engineering best practices: code reviews, unit/integration testing, performance tuning, documentation.  
• Contribute to cloud migration and modernization initiatives, especially in Azure or AWS environments.  
• Mentor junior developers and collaborate within a cross-functional agile team.  

Must have

• React
• .NET Core
• C#
• Python
• CD
• Microservices
• REST API
• UI
• JavaScript
• Data pipelines
• Power BI
• Data models
• CI/CD Pipelines
• Automated testing
• Kafka
• Integration test
• Performance tuning
• Cloud
• Azure
• AWS
• TypeScript
• Redux
• Web API
• DAX
• BI
• Data modeling
• API
• DevOps
• Azure DevOps
• GitHub Actions
• Jenkins
• Testing
• Cloud platform
• SQL
• PostgreSQL
• Relational database
• NoSQL
• Docker
• Kubernetes