Software .NET Engineer

StoneX Group; Kraków; On-site; PLN 100,000 - 140,000; Full time

Job summary

A global financial services provider in Kraków is seeking a skilled .NET Engineer to design and develop low-latency solutions and scalable backend services. The ideal candidate has over 3 years of backend .NET/C# experience and strong knowledge of .NET Core and messaging systems. This hybrid role offers a collaborative environment where you will tackle live production challenges and optimize processes.

Benefits

Private parking for employees

Qualifications

• 3+ years of experience in backend .NET/C# development.
• Good knowledge of .NET Core, APIs, multithreading, and performance.
• Experience with messaging systems like RabbitMQ, ActiveMQ, Kafka.
• Hands-on experience with Kubernetes or other orchestration systems.
• Good SQL knowledge.
• Strong communication skills and ability to collaborate across teams.

Responsibilities

• Design and develop low-latency solutions using the latest .NET technologies.
• Build performant, scalable backend services from scratch, or improve existing ones.
• Tackle live production challenges.
• Participate in code reviews, design sessions, and agile ceremonies.

Skills

Backend .NET/C# development

.NET Core

API development

Multithreading

Performance optimization

Messaging systems (e.g. RabbitMQ, Kafka)

Kubernetes

Strong communication

Education

Bachelor's degree in Computer Science or equivalent

Tools

GitHub

Visual Studio

MS SQL Server

Docker

Job description

Overview

Permanent, full-time, hybrid

Connecting clients to markets – and talent to opportunity.

With 4,300 employees and over 400,000 retail and institutional clients from more than 80 offices spread across five continents, we’re a Fortune-100, Nasdaq-listed provider, connecting clients to the global markets – focusing on innovation, human connection, and providing world-class products and services to all types of investors.

At StoneX, we offer you the opportunity to be part of an institutional-grade financial services network that connects companies, organizations, and investors to the global markets ecosystem. As a team member, you'll benefit from our unique blend of digital platforms, comprehensive clearing and execution services, personalized high-touch support, and deep industry expertise. Elevate your career with us and make a significant impact in the world of global finance.

Business Segment Overview:Engage in a deep variety of business-critical activities that keep our company running efficiently. From strategic marketing and financial management to human resources and operational oversight, you’ll have the opportunity to optimize processes and implement game-changing policies.

Technology Ecosystem, you’ll work with :

• Languages & Frameworks: C#, .NET Core, ASP.NET Core
• Architecture: Microservices, Event-driven (Kafka, AMQ), CQRS
• Cloud & Infra: Azure, Kubernetes, Docker, Rancher, TeamCity, Octopus, Grafana, Grafana
• Databases: MS SQL Server (T-SQL), NoSQL, Postgres
• Tooling: GitHub, Visual Studio/Rider, ReSharper
• AI Tools: MS Copilot, GitHub Copilot, ChatGPT

Responsibilities

Position Purpose: This role is ideal for an experienced.NET engineer who thrives on ownership, having knowledge and experience in using .NET ecosystem, knowing the newest trends, be up to date with the newest .NET technology, and wants to work on robust APIs that power real trading - including authentication, pricing, order handling, and more, high loads, low latency systems.

You’ll be an essential part of a highly skilled product team, collaborating with other engineers, tech leads, and QAs to build scalable, high-performing systems used by thousands of clients.

Primary duties will include:

• Design and develop low-latency solutions using the latest .NET technologies.
• Build performant, scalable backend services from scratch, or improve existing ones.
• Tackle live production challenges.
• Participate in code reviews, design sessions, and agile ceremonies.
• Work closely with team leads and stakeholders and other teams across company.

Qualifications

To land this role you will need:

• 3+ years of experience in backend .NET/C# development.
• Good knowledge of .NET Core, APIs, multithreading and performance.
• Experience with messaging systems like RabbitMQ, ActiveMQ, Kafka.
• Hands on experience with Kubernetes or any other orchestration systems.
• Good SQL knowledge.
• Strong communication skills and the ability to collaborate across teams.
• A plus: Experience with financial systems or real-time data.

Education / Certification Requirements:

• Bachelor's degree in Computer Science, Software Engineering, or equivalent experience

Working environment:

• Hybrid - private parking for employees.
• FTE (UoP).

#LI-Hybrid #LI-DK1