Windows Systems Development Engineer

5 hours ago

Bengaluru, Karnataka, India InstaSafe Full time ₹ 12,00,000 - ₹ 36,00,000 per year
About InstaSafe

InstaSafe is a Zero Trust cybersecurity leader, empowering enterprises to secure applications, data, and endpoints across hybrid and cloud environments. Our Zero Trust Network Access (ZTNA), Identity & Access Management (IAM), and Multi-Factor Authentication (MFA) solutions protect over 500,000 endpoints globally, including some of the world's largest enterprises.

We are seeking a
Windows Systems Engineer
to design and develop security agents and authentication modules for Windows endpoints. This includes the
ISA Windows Agent
,
ZTA Windows Agent
,
Windows Credential Provider
, and
Windows MFA integrations
, which are key to enforcing Zero Trust access on enterprise desktops and servers.

Role Overview

The
Windows Systems Engineer
will build
low-level Windows system agents and authentication components
that interact directly with
Win32 APIs, Windows Registry, Active Directory APIs, and Windows Credential Providers
.

This role requires deep experience with
C/C++/C#
, Windows Service development, and secure integration into Windows authentication and networking layers.

Duties & Responsibilities

  • Agent Development

    : Design and maintain

    Windows endpoint agents

    that enforce Zero Trust access policies.

  • Authentication Integration

    : Implement and extend

    Windows Credential Provider APIs

    ,

    Active Directory APIs

    , and

    MFA workflows

    (RADIUS, LDAP, AD).

  • Service Development

    : Build and manage

    Windows Services

    that run securely in enterprise environments.

  • Networking & Security

    : Integrate with VPN/ZTNA protocols (OpenVPN, IPSec) and ensure secure communication using

    TLS/SSL

    .

  • System-Level Work

    : Work with

    Windows Registry

    , COM Interfaces, and packaging/distribution using

    MSI installers

    .

  • Debugging & Troubleshooting

    : Use advanced debugging tools (WinDbg, Process Explorer, SysInternals suite).

  • Cross-Platform Collaboration

    : Work with Linux/Mac agent teams to ensure consistent features across platforms.

  • Continuous Improvement

    : Stay current with Windows security advancements, hardening practices, and APIs.

Requirements
Qualifications & Skills

Education & Experience:

  • Bachelor's/Master's degree in Computer Science, Engineering, or equivalent.

  • 4–7 years' experience

    in Windows system-level programming.

Core Technical Skills (with links for TA reference):

  • C Programming

    /

    C++

    /

    C#
  • Win32 APIs
  • Windows Service Development
  • Windows Registry Programming
  • Active Directory APIs
  • Windows Credential Provider APIs
  • COM Interfaces
  • MSI Packaging

  • OpenVPN

    /

    IPSec

    integration

  • Debugging with

    WinDbg

    ,

    SysInternals

Preferred/Good-to-Have:

  • Experience with

    Windows MFA SDKs

    and RADIUS/LDAP integrations.

  • Familiarity with

    Azure AD/Entra ID APIs

    for modern authentication.

  • Experience with

    endpoint security software or VPN clients

    .

  • Exposure to

    Agile/CI/CD

    development workflows.

Benefits
Career Value Proposition

  • Build

    mission-critical Windows agents

    used in enterprise environments worldwide.

  • Work directly with

    core Windows authentication flows

    to deliver cutting-edge Zero Trust solutions.

  • Collaborate with top engineers across security, networking, and OS platforms.

  • Gain expertise in

    enterprise-grade Windows security engineering

    .

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