Tietoevry

Senior .NET Backend Developer – MS SQL, REST API, AI

Tietoevry

full-time

Posted on:

Location Type: Hybrid

Location: Ostrava • 🇨🇿 Czech

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Job Level

Senior

Tech Stack

AWSAzureCloudEntity FrameworkMS SQL ServerSQL

About the role

  • Designing and building the backend layer, including: Developing the DataLayer on top of Microsoft SQL Server, with a focus on schema design and query optimization
  • Implementing and consuming REST APIs for integration with security providers (Azure, AWS, Google Cloud) and 3rd-party security tools
  • Extending our custom workflow engine, enrichment APIs, and backend logic
  • Participating in the development of the web portal and reporting infrastructure
  • Working on AI-driven features to enhance the efficiency of Security Operations, such as: Alert classification, summarization, and triage using models like OpenAI / Azure OpenAI
  • Automating playbook actions and recognizing patterns that trigger automated responses

Requirements

  • Strong experience with C#
  • Proficiency in T-SQL, Entity Framework, and Dapper, including hands-on work with database schema design and query optimization
  • Solid understanding of REST APIs: Creating and consuming endpoints
  • Familiarity with Swagger/OpenAPI, OAuth2, JWT, OpenID, and Role-Based Access Control (RBAC)
  • Experience with Test-Driven Development (TDD) and mocking frameworks
  • Proficient in: Asynchronous programming, parallelism
  • Efficient memory usage (Span, Memory)
  • Writing high-performance backend code
  • Knowledge of Dependency Injection, CQRS, Mediator pattern, and event-driven architectures
  • Hands-on experience integrating with OpenAI, Azure OpenAI, or similar APIs (e.g., ChatGPT, GPT-4)
Benefits
  • work partially or completely remote > work from wherever it suits you
  • extra holidays > we have 25 days off plus 2 sick days.
  • we contribute from 10 400 CZK per year > you name it. Choose from contributions for pension and life insurance, sports, culture, health, travel or education in the cafeteria.
  • educate yourself > we regularly organize and pay for IT courses, certifications, language training and personal development courses
  • 107 CZK meal allowance on top of your salary
  • reward for a new colleague > refer another colleague to us and get up to 80,000 CZK
  • we'll support you when you're sick > for colleagues who are seriously ill for a long period of time, we contribute to sick pay in excess of the law
  • extra work is appreciated > when overtime is needed, we pay more than the law requires
  • stay fit and fresh > in Ostrava, use the free fitness facilities in the building, in other locations, do sports with Multisport
  • Nordic culture > we believe in you. No one is breathing down your neck and checking every minute of your work. We are friendly and open.

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
C#T-SQLEntity FrameworkDapperREST APIsAsynchronous programmingTest-Driven DevelopmentDependency InjectionCQRSevent-driven architectures