About the role

About the Role: We are looking for a Hands-on Software Engineer 4 to work on our Seeker Inline Agent for .NET — a dynamic 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.

Experience : 9+ Years

Job location : Black Duck, Bangalore (Prestige Blue Chip, Near Dairy Circle, Opp to Christ University)

Work Mode : Hybrid (3 days WFO)

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, MSBuild)

Required Skills:

9+ years of professional software development experience
Strong 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 strong 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, MSBuild, and complex build orchestration
Strong debugging skills — ability to diagnose issues across managed/native boundaries
Experience with Git and CI/CD pipelines (GitLab CI preferred)

Preferred Skills:

- Experience in application security, DAST/IAST, or security instrumentation
- Knowledge of OWASP Top 10 vulnerabilities and detection techniques
- Experience with Docker containerization and multi-arch builds (x64, ARM64, Alpine)
- Familiarity with serverless platforms (AWS Lambda, Azure Functions)
- Experience with WiX installer authoring and NuGet packaging
- Knowledge of code obfuscation techniques
- Familiarity with logging frameworks (log4net, spdlog, NLog)
- Experience with WebSocket communication protocols

Tech Stack:

Layer

Technologies

Languages

C#, C++, PowerShell

Frameworks

.NET Framework 3.5–4.8.1, .NET Core 2.0–3.1, .NET 5–10

Build

Cake Build, CMake, MSBuild, GitLab CI

Native

CLR Profiling API, COM, spdlog, TBB

Testing

NUnit, Integration test harness

Platforms

Windows x64, Linux x64/ARM64, Alpine

Packaging

NuGet, WiX Installer

Nice to Have:

Experience contributing to profilers, APM agents, or runtime instrumentation tools
Background in reverse engineering or binary analysis
Familiarity with ReSharper code inspection tooling

Software Engineer 4 (C#,. Net core, Runtime Profiling, CLR Internals)

About the role

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