IT Infrastructure Engineer (Microsoft)

TL;DR

IT Infrastructure Engineer (Microsoft): Own and evolve enterprise identity and messaging platforms in a hybrid Microsoft environment with an accent on Active Directory, Exchange Hybrid, and PKI. Focus on designing secure access control, implementing SSO/federation scenarios, and driving the evolution of identity architectures.

Location: Remote or Office (Ukraine)

Company

hirify.global is a Ukrainian hybrid IT company and a subsidiary of Kyivstar, creating technological solutions and products for businesses and users.

What you will do

• Lead the administration and evolution of Microsoft Active Directory in a complex enterprise environment.
• Manage Exchange and Exchange Hybrid (on-premises and Online) to ensure reliability and security.
• Design and maintain Public Key Infrastructure (PKI) and certificate lifecycle management.
• Administer Microsoft 365 / Entra ID identity services, roles, and access models.
• Implement and support ADFS / SSO and federation scenarios for applications.
• Collaborate with network and platform teams on identity-related integrations.

Requirements

• Strong hands-on expertise in Active Directory (architecture, trusts, GPO, troubleshooting).
• Proven experience with Exchange (on-prem) and Exchange Hybrid.
• Solid practical experience with PKI (Root/Issuing CAs, templates, CRL/OCSP).
• Production experience with Microsoft 365 / Entra ID in hybrid environments.
• Practical knowledge of ADFS / SSO, federation, and claims-based authentication.
• English: Intermediate or higher.

Culture & Benefits

• Flexible work format: choice between office or remote work.
• Remote onboarding process.
• Annual or quarterly performance bonuses.
• Professional growth through a company library, internal resources, and partner programs.
• Health and life insurance.
• Wellbeing program and access to a corporate psychologist.