Senior Security Software Engineer - Platform & Cloud

State Street; Kraków; On-site; PLN 210,000 - 300,000; Full time

Benefits offered by this job

Permanent contract

Birthday Day Off

3rd year anniversary Day Off

Gold Medical Package for employees and

their families

Premium life insurance

Private pension plan

Soft skills training

Technical workshops

Language classes

Volunteer opportunities

Well-being programs

Job summary

State Street in Kraków seeks a Senior Software Engineer to join Platform Security Solutions, focusing on self-service, scanning and platform integrations for enterprise-scale systems. You will design, build, and operate distributed applications across cloud and on-prem environments, emphasizing security and performance.

You will work with C#/.NET, Blazor or ASP.NET Core, MSSQL and APIs, while leveraging cloud platforms (Azure/AWS/GCP) and modern SDLC tooling.

Qualifications

• Proficient in modern C# and .NET (8/9/10).
• Experience with Blazor applications or ASP.NET Core.
• Relational Databases; MSSQL preferred.
• Strong cybersecurity concepts including Identity & Access Management (IAM) and least privilege.
• Performance and scalability concepts including asynchronous code, batch processing, locking and concurrency.
• Experience designing, building, maintaining and complex distributed systems.
• Strong experience with APIs.
• Experience with Windows Server and Active Directory.
• Proficiency with SDLC tooling such as GIT, CI/CD pipelines and Jira.
• Experience with public cloud platforms (Azure, AWS, GCP) and migrating workloads to cloud-native.
• Experience with ServiceNow API.
• Experience in a regulated industry.
• Fluency in using LLMs to speed up engineering workflows.

Responsibilities

• Design, build, maintain and scale complex distributed systems and APIs.
• Work with Relational Databases and cloud-native architectures; migrate workloads to cloud platforms.
• Collaborate across teams to deliver secure, scalable platform solutions.

Skills

C# / .NET

Blazor

ASP.NET Core

Relational DBs

MSSQL

IAM & least privilege

Performance & scale

APIs

Windows Server

Active Directory

GIT / CI/CD

Jira

Cloud platforms

Azure

AWS

GCP

ServiceNow API

Regulated industry

LLMs in engineering

Education

Job description

State Street in Kraków seeks a Senior Software Engineer to join Platform Security Solutions, focusing on self-service, scanning and platform integrations for enterprise-scale systems. You will design, build, and operate distributed applications across cloud and on-prem environments, emphasizing security and performance.

You will work with C#/.NET, Blazor or ASP.NET Core, MSSQL and APIs, while leveraging cloud platforms (Azure/AWS/GCP) and modern SDLC tooling.