IT Infrastructure Engineer (Microsoft)

TL;DR

IT Infrastructure Engineer (Microsoft): Designing and maintaining enterprise identity and messaging platforms in a hybrid Microsoft environment with an accent on Active Directory, Exchange, and PKI. Focus on implementing secure access control, federation scenarios (ADFS/SSO), and optimizing identity architectures for high-performance systems.

Location: Remote or Office (Ukraine)

Company

hirify.global is a Ukrainian hybrid IT company and a subsidiary of one of Ukraine's largest telecom operators.

What you will do

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

Requirements

• Strong hands-on expertise in Active Directory architecture, trusts, GPO, and 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 arrangement: choice between office or remote work.
• Remote onboarding process.
• Annual or quarterly performance bonuses.
• Professional growth through the company library, internal resources, and partner programs.
• Health and life insurance.
• Wellbeing program and corporate psychologist.