{"id":2122211,"url":"https://alion.io/job/cohesity-staff-software-engineer-active-directory-internals-directory-services","title":"Staff Software Engineer — Active Directory Internals & Directory Services","company":{"id":1043373,"name":"Cohesity","domain":"cohesity.com","url":"https://alion.io/company/cohesity-3","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"staff","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bengaluru, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":39000,"max_usd":102000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":19},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Active Directory","optional":false},{"name":"AWS","optional":false},{"name":"DNS","optional":false},{"name":"GCP","optional":false},{"name":"LDAP","optional":false},{"name":"Azure","optional":true},{"name":"C#","optional":true},{"name":"C++","optional":true},{"name":"Microsoft Entra ID","optional":true}],"status":"live","first_seen_at":"2026-10-05T00:00:00Z","employer_posted_date":"2026-10-05","last_verified_at":"2026-10-15T02:35:47Z","board_verified":true,"closed_at":null,"days_open":10,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":10},"description":"Cohesity is the leader in AI-powered data security. Over 13,600 enterprise customers, including over 85 of the Fortune 100 and nearly 70% of the Global 500, rely on Cohesity to strengthen their resilience while providing Gen AI insights into their vast amounts of data. Formed from the combination of Cohesity with Veritas’ enterprise data protection business, the company’s solutions secure and protect data on-premises, in the cloud, and at the edge. Backed by NVIDIA, IBM, HPE, Cisco, AWS, Google Cloud, and others, Cohesity is headquartered in Santa Clara, CA, with offices around the globe. \nWe’ve been named a Leader by multiple analyst firms and have been globally recognized for Innovation, Product Strength, and Simplicity in Design , and our culture. \nWant to join the leader in AI-powered data security?\nAbout the Role\nWe're looking for an engineer who understands Active Directory the way its designers do - not just how to administer it, but how it actually works underneath: how objects replicate, how changes are tracked, how deletions age out, and how identity continuity is preserved across restores. You'll build and harden the core engine that reads, tracks, and safely writes AD state, powering reliable backup, synchronization, and recovery at scale.\nThis is a deep-systems role. If you've ever debugged a replication metadata mismatch, reasoned about USN rollback, or cared about SID history surviving a cross-domain restore, you'll be at home here.\nWhat You'll Do\nDesign and implement the directory engine that discovers, tracks, and safely applies changes to Active Directory objects.\nBuild robust change-tracking pipelines using DirSync, USN cookies, and change notification, handling cursor persistence, catch-up, and re-sync correctly.\nImplement correct object lifecycle handling - tombstones, deleted-object lifetime, and Recycle Bin semantics - for accurate backup and recovery.\nGuarantee identity continuity across operations: SID, SID history, and GUID preservation and validation.\nImplement safe write paths - modify, ModifyDN, and object creation - with idempotency, conflict handling, and integrity guarantees.\nWork with AD-integrated DNS and Group Policy internals to ensure complete, consistent capture and restore.\nDiagnose and resolve complex replication, consistency, and LDAP edge cases in production environments.\nRequired Skills & Experience\nYou should have hands-on, internals-level expertise across most of the following:\nSchema & Replication\nAD schema, object classes, and linked-value replication\nReplication metadata, USN semantics, and consistency reasoning\nDirectory Access\nLDAP search and controls, including paged and persistent search\nDirSync, USN cookies, and change notification for change tracking\nObject Lifecycle\nTombstones, deleted-object lifetime, and AD Recycle Bin behavior\nIdentity Continuity\nSID, SID history, and GUID continuity semantics across domains and restores\nGroup Policy & DNS\nGroup Policy internals: GPC / GPT and SYSVOL\nAD-integrated DNS zones and records\nSafe Writes\nCorrect and safe modify, ModifyDN, and object-create operations\nNice to Have\nExperience building backup, replication, disaster-recovery, or migration tooling for Active Directory.\nFamiliarity with Entra ID / Azure AD hybrid environments.\nDepth in C/C++, C#, Go; systems-level performance work.\nExperience operating against large, multi-domain / multi-forest deployments.\nData Privacy Notice for Job Candidates:\nFor information on personal data processing, please see our Privacy Policy.\nEqual Employment Opportunity Employer (EEOE)\nCohesity is an Equal Employment Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, creed, religion, sex, sexual orientation, national origin or nationality, ancestry, age, disability, gender identity or expression, marital status, veteran status or any other category protected by law.\nIf you are an individual with a disability and require a reasonable accommodation to complete any part of the application process, or are limited in the ability or unable to access or use this online application process and need an alternative method for applying, you may contact us at 1-855-9COHESITY or  for assistance.\nIn-Office Expectations\nCohesity employees who are within a reasonable commute (e.g. within a forty-five (45) minute average travel time) work out of our core offices 2-3 days a week of their choosing.\nWe strongly prefer candidates who are currently located in or near the designated job location. Candidates outside the area should apply only if they are committed to relocating prior to their start date and have the legal right to work in the job location.","description_format":"text","description_chars":4734,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Identity Management","Artificial Intelligence","Cybersecurity","Security Operations"],"lifecycle":[{"event":"open","at":"2026-10-09T00:01:34Z"}],"visa":[],"liveness":{"score":89,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.894,"p_room":1,"age_days":9,"expected_fill_days":36,"reasons":["conf:11","velocity","win:early","comp:brand"],"computed_at":"2026-10-14T06:34:16Z"},"pay":null,"html_url":"https://alion.io/job/cohesity-staff-software-engineer-active-directory-internals-directory-services","json_url":"https://alion.io/job/cohesity-staff-software-engineer-active-directory-internals-directory-services.json","meta":{"generated_at":"2026-10-15T05:06:12Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":7546,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-16T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":1043373},"rest":"https://alion.io/mcp/rest/get_company?id=1043373"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcohesity-staff-software-engineer-active-directory-internals-directory-services"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fcohesity-staff-software-engineer-active-directory-internals-directory-services"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fcohesity-staff-software-engineer-active-directory-internals-directory-services"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/cohesity-staff-software-engineer-active-directory-internals-directory-services\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcohesity-staff-software-engineer-active-directory-internals-directory-services"}]}