Skip to content
Harvey Nash Technology

Senior Full stack Developer (.NET)

Harvey Nash Technology Show all offers
Warszawa
2 months ago

In short

Senior Full Stack Software Engineer (.

NET / React) role in Warszawa. Responsibilities include developing and enhancing internal platforms using C#, .

NET, ASP.

NET Core, React, and SQL Server. Requires 7+ years of commercial experience.

AI-written summary based on the listing content.

Senior Full Stack Software Engineer (.

NET / React)

About the role

Join one of the technology teams supporting a global investment management firm. You will become part of an established engineering team responsible for developing and enhancing internal platforms used by Trading & Compliance or Treasury departments.

This is not a greenfield project. You'll work on business-critical applications, designing new features, improving existing modules, and building tools that support key business users.

You'll be working in a highly distributed technology environment spanning public cloud platforms, private infrastructure, on-premise systems, and numerous third-party data providers.


Must have

  • 7+ years of commercial experience in Full Stack software development
  • Strong expertise in C# and .

NET

  • Hands-on experience with ASP.

NET Core and REST APIs

  • Commercial experience with React
  • Experience working with SQL Server and T-SQL
  • Understanding of application architecture and software design principles
  • Experience building enterprise-scale applications
  • Strong analytical and problem-solving skills
  • Excellent communication skills
  • High attention to code quality and engineering best practices
  • Commitment to the highest ethical standards

Nice to have

  • Node.js
  • AngularJS
  • Experience with AWS, Azure or Google Cloud Platform
  • Experience working with distributed systems
  • Knowledge of financial services or capital markets

Your responsibilities

  • Design, develop and maintain backend services using C#/.

NET and ASP.

NET Core

  • Build modern front-end applications using React
  • Develop and optimize SQL Server databases and T-SQL stored procedures
  • Design and implement REST APIs
  • Deliver new modules and features for internal business platforms
  • Participate in application architecture and technical design discussions
  • Work with cloud-based, on-premise and distributed systems
  • Collaborate with engineering teams across multiple technology departments
  • Write clean, maintainable and high-quality production code

Tech stack

Backend

  • C#
  • .

NET

  • ASP.

NET Core

  • REST API

Frontend

  • React
  • Node.js (selected teams)
  • AngularJS (selected components)

Database

  • SQL Server
  • T-SQL

Cloud & Infrastructure

  • AWS
  • Azure
  • Google Cloud Platform
  • Private Cloud
  • On-Premise Infrastructure
Published 2026-07-02
Source