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Seargin

Fullstack Developer

Seargin
Poland · Contract · Mid-Senior

SEARGIN IS HIRING!


Role overview

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.


Key responsibilities:

  • 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.


Requirements (must-have):

  • 10+ years of professional software development experience.

Front-end:

  • Strong proficiency in React.js, JavaScript/TypeScript, Redux/RTK, hooks, and modern UI patterns.

Back-end:

  • Expertise in C# .NET Core, REST APIs, Web APIs, and microservices-based development.

Python (pyspark):

  • Hands-on experience with distributed data processing, data pipelines, and analytic transformations.

Power BI:

  • Extensive experience developing dashboards, data models, DAX calculations, and enterprise-grade BI solutions.
  • Strong understanding of data modeling, performance tuning, and governance in Power BI.

Architecture:

  • Strong knowledge of microservices, API design, event-driven architectures, and distributed systems.

DevOps / CI/CD:

  • Experience with Azure DevOps, GitHub Actions, Jenkins, or similar.
  • Strong understanding of automated builds, testing, deployment, and monitoring.

Cloud Platforms:

  • Experience with Azure or AWS (Azure preferred).

Databases:

  • Proficiency with SQL Server, PostgreSQL, or other relational databases; NoSQL knowledge a plus.

Containerization:

  • Experience with Docker, Kubernetes, container orchestration.

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.


Discover the Power of IT Excellence. Apply!

To learn more about Seargin, please visit our web page: www.seargin.com

Key Skills

Ranked by relevance

microservices react python cloud cicd aws ui c restful apis kubernetes postgresql sql server responsive power bi reactjs jenkins docker devops server nosql kafka sql dax
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Posted
Mar 30, 2026
Type
Contract
Level
Mid-Senior
Location
Poland
Company
Seargin

Industries

IT Services IT Consulting

Categories

Information Technology

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