Senior OS Developer

Job Description: Senior OS Developer (Windows)

Role Summary

We are looking for a Senior OS Developer (Windows) to own design, development, and maintenance .You will build and evolve OS-level customizations, imaging, deployment, drivers, and enterprise management capabilities that differentiate in the enterprise segment and ensure a secure, manageable, and consistent Windows experience at scale.

Key Responsibilities

• Design and develop OS customizations for client Windows Enterprise: answer files, unattend.xml, provisioning packages, and policy-driven configuration.

• Build and maintain custom Windows images (WIM/ESD) and deployment pipelines (MDT, SCCM/MECM, or modern equivalents) for JioPC enterprise rollout and refresh.

• Implement enterprise management integration: Group Policy, MDM (Intune/WS1), domain join, Azure AD join, and Jio-specific management agents or scripts.

• Ensure solution supports security and compliance (BitLocker, Windows Defender, baselines, compliance reporting) as required for enterprise customers.

• Driver and hardware integration

• Develop, integrate, and maintain Windows drivers and driver packages for client hardware (chipset, graphics, network, peripherals).

• Resolve driver compatibility, signing (WHQL/EV), and stability issues; work with OEM/hardware partners and central engineering as needed.

• Validate driver and OS behavior across client SKUs and Windows feature/quality update cycles.

• Automation and tooling

• Automate image build, testing, and deployment using PowerShell, Windows Configuration Designer, MDM APIs, and CI/CD where applicable.

• Build or integrate tools for inventory, health checks, and compliance validation on client enterprise fleet.

• Document scripts, pipelines, and runbooks for operations and support teams.

• Technical leadership and collaboration

• Guide junior developers and work with product, security, and operations on client Windows Enterprise roadmap and priorities.

• Align with central platform and security teams on standards, baselines, and tooling; adopt and extend them for JioPC.

• Participate in architecture and design reviews; drive quality, performance, and security in the OS layer.

Required Technical Capabilities

Must have

• Windows OS internals and customization

• Deep knowledge of Windows installation and imaging: WinPE, DISM, image capture/apply, WIM/ESD, answer files (unattend.xml, autounattend.xml), Windows Configuration Designer / provisioning packages.

• Experience with Windows servicing: CBS, component store, feature/quality updates, servicing stack, rollback.

• Understanding of Windows security: BitLocker, Secure Boot, TPM, Windows Defender, Credential Guard, AppLocker/WDAC as relevant to enterprise imaging and policy.

• Deployment and management

• Hands-on experience with enterprise deployment: MDT, SCCM/MECM (OSD, task sequences), or Autopilot + Intune (or equivalent MDM) for Windows.

• Strong knowledge of Group Policy and MDM policies (CSPs); ability to design and troubleshoot policy-driven configuration for enterprise devices.

• Familiarity with domain join, Azure AD join, Hybrid Azure AD, and identity/config sync in enterprise scenarios.

• Driver and hardware

• Experience with Windows driver development or integration: WDM/WDF, INF, driver signing (WHQL, EV), driver store, PnP.

• Ability to debug driver/OS issues (WinDbg, Event Viewer, reliability monitor, driver verifier).

• Understanding of ACPI, firmware (UEFI), and Secure Boot in the context of OEM/enterprise devices.

• Scripting and automation

• Proficient in PowerShell (v5.1 and PowerShell 7) for automation, imaging, and configuration.

• Experience with batch/WMI/CIM for inventory and system configuration; basic understanding of C#/.NET or C++ for tools or drivers is a plus.

• General

• 6+ years of experience in Windows OS development, imaging, deployment, or enterprise client engineering, with 2+ years in a senior or lead capacity.

• Bachelor’s degree in Engineering (CSE/IT/ECE) or equivalent.

• Strong verbal and written communication; ability to document designs, APIs, and procedures.

• Experience working in a product-focused environment (OEM, device vendor, or enterprise client platform team).

Good to have

• Experience with OEM/device-specific Windows solutions (custom images, preloads, enterprise SKUs).

• Autopilot, Intune, Windows Update for Business, Feature Update management in enterprise fleets.

• WHQL submission, HLK/HCK testing, and driver lifecycle management.

• CI/CD for image builds (e.g. Azure DevOps, Jenkins) and infrastructure as code (e.g. DSC, desired state).

• C++/C# for small utilities, drivers, or management agents.