Qureos

FIND_THE_RIGHTJOB.

Backend Performance & Security Engineer - .Net

Role Summary

We are hiring a backend engineer focused on optimizing APIs, SQL queries, caching layers, and security standards for large-scale enterprise applications built on .NET Core and SQL Server.

Technology Stack

.NET Core 8, SQL Server 2019 Enterprise Edition, Redis, SQL Lite, OData

Key Responsibilities

  • Profile and optimize .NET Core 8 APIs for performance, concurrency, and scalability.
  • Refactor and tune SQL Server stored procedures, queries, and indexes.
  • Implement partitioning, materialized views, and temporal tables for scaling data performance.
  • Optimize Redis caching and IIS configurations for faster releases and throughput.
  • Conduct grey-box and black-box testing to identify and close vulnerabilities.
  • Design and prepare backend services for microservices architecture transition.
  • SQL query optimization and performance tuning
  • Identifying application-level slowness and providing solutions
  • Cybersecurity compliance and best practices
  • Web application security
  • Data privacy and security standards

Required Skills

  • 6+ years of backend development experience using .NET Core and SQL Server.
  • Proficient in SQL Server query optimization, indexing, partitioning, and query execution plan analysis.
  • Hands-on with IIS tuning, Redis, and application performance profiling tools.
  • Strong understanding of API security, authentication, and OWASP compliance.
  • Experience in microservices design using Docker and Kubernetes.
  • Understanding of Agile methodologies.
  • Familiarity with architecture styles/APIs REST.

Preferred Skills / Experience

  • Knowledge of cloud scaling strategies and load balancing.
  • Experience integrating Application Insights or similar performance monitoring tools.

Key Performance Indicators (KPIs)

  • Reduce API response times by at least 50%.
  • Achieve SQL query execution within <2 seconds for key procedures.
  • Zero critical vulnerabilities remaining after

Job Type: Full-time

Pay: Rs200,000.00 - Rs250,000.00 per month

Application Question(s):

  • What is your current salary?
  • What is your expected salary?
  • What is your notice period?
  • Since it's an on-site role, would you be able to commute to Bahria Complex 1, M.T.Khan Road?

Work Location: In person

© 2026 Qureos. All rights reserved.