Staff Software Engineer — Active Directory Internals & Directory Services

Overview

Design and harden the core directory engine that reads, tracks, and safely writes Active Directory state, supporting reliable backup, synchronization, and recovery at scale.

What you'll do

• Design and implement the directory engine that discovers, tracks, and safely applies changes to Active Directory objects.
• Build robust change-tracking pipelines using DirSync, USN cookies, and change notification, handling cursor persistence, catch-up, and re-sync correctly.
• Implement correct object lifecycle handling for tombstones, deleted-object lifetime, and Recycle Bin semantics for accurate backup and recovery.
• Guarantee identity continuity across operations through SID, SID history, and GUID preservation and validation.
• Implement safe write paths for modify, ModifyDN, and object creation operations with idempotency, conflict handling, and integrity guarantees.
• Work with AD-integrated DNS and Group Policy internals to ensure complete, consistent capture and restore.
• Diagnose and resolve complex replication, consistency, and LDAP edge cases in production environments.

What you'll need

• Hands-on, internals-level expertise across most of the listed Active Directory areas.
• Knowledge of AD schema, object classes, and linked-value replication.
• Knowledge of replication metadata, USN semantics, and consistency reasoning.
• Knowledge of LDAP search and controls, including paged and persistent search.
• Knowledge of DirSync, USN cookies, and change notification for change tracking.
• Knowledge of tombstones, deleted-object lifetime, and AD Recycle Bin behavior.
• Knowledge of SID, SID history, and GUID continuity semantics across domains and restores.
• Knowledge of Group Policy internals, including GPC, GPT, and SYSVOL.
• Knowledge of AD-integrated DNS zones and records.
• Knowledge of correct and safe modify, ModifyDN, and object-create operations.

Nice to have

• Experience building backup, replication, disaster-recovery, or migration tooling for Active Directory.
• Familiarity with Entra ID / Azure AD hybrid environments.
• Depth in C/C++, C#, or Go, and systems-level performance work.
• Experience operating against large, multi-domain / multi-forest deployments.

Details

• Location: Bangalore, India.
• In-office work 2–3 days a week for employees within a reasonable commute, with the days of their choosing.
• Candidates outside the area should be committed to relocating prior to their start date and have the legal right to work in the job location.