Senior C# / .NET Developer

Optiveum; Kraków; Hybrid; PLN 186.000 - 220.000; Vollzeit

Zusammenfassung

Optiveum is seeking a Senior C# / .NET Developer to join a leading global investment bank project based in Kraków. The role focuses on building microservices, cloud-native solutions on Azure, and CI/CD pipelines via GitLab, with Docker and Kubernetes in a hybrid work arrangement.

You will develop and maintain high‑quality C#/.NET applications, collaborate with cross‑functional teams, and ensure scalable, reliable software.

Qualifikationen

• 8+ years of commercial software development experience.
• Strong experience with C#/.NET.
• Experience with microservices and event-driven architecture.
• Experience working with Microsoft Azure.
• Knowledge of Oracle, Sybase or PostgreSQL databases.
• Experience with Docker and Kubernetes.
• Experience with GitLab CI/CD pipelines.
• Knowledge of software development and deployment best practices.
• Fluent English.
• Polish or EU citizenship, or a permanent residence / work permit valid for at least 12 months.

Aufgaben

• Develop and maintain applications using C#/.NET
• Design and implement microservices and event-driven solutions
• Develop and support cloud-based applications on Microsoft Azure
• Work with Oracle, Sybase or PostgreSQL databases
• Build, deploy and maintain applications using Docker and Kubernetes
• Create and enhance GitLab CI/CD pipelines
• Collaborate with development teams to deliver scalable and reliable solutions

Kenntnisse

C#/.NET

Microservices

Event-driven architecture

Microsoft Azure

Docker

Kubernetes

GitLab CI/CD

Fluent English

Tools

Oracle

Sybase

PostgreSQL

Jobbeschreibung

Senior C# / .NET Developer

About the Offer

We are currently looking for a Senior C# / .NET Developer to join the team of one of the world's leading global investment banks. The project is delivered together with a large international IT services company. For this role, Optiveum is the recruitment and contracting party, which means you will sign the cooperation agreement directly with us.

You will develop and maintain C#/.NET applications built as microservices and event-driven solutions, running on Docker and Kubernetes in Microsoft Azure and delivered through GitLab CI/CD.

Key Details:

• Rate: 135–160 PLN/h (B2B), depending on experience

• Work Model: Hybrid, 3 days per week from the client's office (non-negotiable), full-time

• Location: Kraków (candidates must live in or near Kraków)

Responsibilities:

• Develop and maintain applications using C#/.NET

• Design and implement microservices and event-driven solutions

• Develop and support cloud-based applications on Microsoft Azure

• Work with Oracle, Sybase or PostgreSQL databases

• Build, deploy and maintain applications using Docker and Kubernetes

• Create and enhance GitLab CI/CD pipelines

• Collaborate with development teams to deliver scalable and reliable solutions

Requirements:

• 8+ years of commercial software development experience

• Strong experience with C#/.NET

• Experience with microservices and event-driven architecture

• Experience working with Microsoft Azure

• Knowledge of Oracle, Sybase or PostgreSQL databases

• Experience with Docker and Kubernetes

• Experience with GitLab CI/CD pipelines

• Knowledge of software development and deployment best practices

• Fluent English

• Polish or EU citizenship, or a permanent residence / work permit valid for at least 12 months

Recruitment Process:

• One interview with the IT services partner, followed by 1–3 interviews with the bank

• Technical tasks are done live: please have your programming environment set up and tested beforehand. The use of AI tools, coding assistants or code generators during interviews is not allowed

• The selected candidate will go through a background check by an external company (HireRight), covering identity, right to work, education and employment history, so the dates and employers in your CV must be accurate

• Your name in the application and CV must match your official ID document exactly (Polish citizens: please include all first names)

• Candidates who took part in a recruitment process for this IT services partner or this bank in the last 12 months cannot be considered