Software Engineer 4 – C# .NET with CLR Profiling

About the Role:

We are looking for a Senior Staff Software Engineer to work on our
Seeker
Inline
Agent
for
.NET
— a agile application security testing (DAST) agent that instruments .NET applications at runtime to detect security vulnerabilities. You will work across C#, C++, and multiple .NET runtime versions to build and maintain profiler-based instrumentation, security checkers, and platform integrations.

Responsibilities:
Design, develop, and maintain the .NET agent core, including security checkers (SQLi, XSS, CSRF, deserialization, etc.) and taint analysis engine
Develop and optimize native C++ profilers using the CLR Profiling API for both .NET Framework and .NET Core/.NET 5+
Support multi-platform builds targeting Windows (x64), Linux (x64, ARM64), and Alpine/musl environments
Extend agent capabilities to new .NET versions (.NET 8, 9, 10+) and hosting models (AWS Lambda, Azure Functions, gRPC, OWIN, WCF)
Collaborate on CI/CD pipelines (GitLab CI) across multiple OS targets and Docker-based build environments




Write and maintain unit tests (NUnit) and integration tests across framework versions
Troubleshoot low-level runtime issues involving IL rewriting, method interception, and memory management
Participate in code reviews, architecture discussions, and contribute to build system improvements (Cake Build, CMake, MS Build)

Required Skills
9+
years
of professional software development experience
Solid
C#
proficiency
across
.NET Framework (3.5–4.8.1)
and
.NET Core/.NET 5+
(up to .NET 10)
C++
experience
— working with native interop, COM, and platform APIs (CLR Profiling API is a solid plus)
Deep understanding of the
.NET
CLR internals
— assembly loading, JIT compilation, IL metadata, type system
Experience with
multi-platform
development
(Windows & Linux)
Proficiency with
CMake,
MS Build
, and complex build orchestration
Strong debugging skills — ability to diagnose issues acr

📌 Senior Staff Software Engineer Bengaluru
🏢 Black Duck
📍 Bengaluru