Senior C# Developer: Explorers/Identity Resilience

Veeam is the Data and AI Trust Company, specializing in helping organizations ensure their data and AI are fully understood, secured, and resilient to enable the acceleration of safe AI at scale. As the market leader in both data resilience and data security posture management, Veeam is built for the convergence of identity, data, security, and AI risk. Headquartered in Seattle with offices in more than 30 countries, Veeam protects over 550,000 customers worldwide, who trust Veeam to keep their businesses running. Join us as we go fearlessly forward together, growing, learning, and making a real impact for some of the world’s biggest brands. About the Role We're looking for a Senior C# Developer to join our team, which focuses on two main areas: *Veeam Explorers - granular recovery for SQL Server, Oracle, PostgreSQL, Exchange and SharePoint - where we expose browse and restore through REST and gRPC so they can be driven from the Web UI, PowerShell and automation. * Active Directory Forest Recovery as part of Identity Resilience, which rebuilds an entire AD forest after a domain-wide outage or ransomware attack. Both are the same kind of system: a server orchestrating a remote agent over a versioned contract, running operations that take hours and must survive failure at any step. What You'll Do • Design and implement recovery flows end-to-end — REST and gRPC contracts, server-side orchestration, and the agent that executes on the target machine • Build PowerShell cmdlets as a first-class product surface, with parameter validation and a coherent object model • Design pre-flight validation that catches issues before a restore starts, across REST, server and agent layers • Work close to what you're recovering: SQL Server, Oracle and PostgreSQL internals, or Active Directory — domain controller promotion, SYSVOL and NTDS, DNS, Kerberos, replication • Manage long-running distributed sessions: agent deployment, keep-alive, cleanup on failure and timeout, cancellation • Own your integration test suite and keep it green • Refactor a long-lived codebase as you go — this is a mature product, and improving what's there is part of the job Technologies We Work With: C#, .NET, REST, gRPC / Protobuf, PowerShell, multithreading and async, Windows Server and Active Directory, Linux, MS SQL / PostgreSQL / Oracle, VMware and Hyper-V, Git, TFS, Visual Studio, Rider What You'll Bring • 5+ years of commercial C# product development, with a deep understanding of .NET, data structures and algorithms • Experience designing service APIs — REST, gRPC or similar — where consumers are external and backward compatibility matters • Strong async and multithreading: cancellation, session lifecycle, hours-long operations • Depth in at least one of: Windows Server and Active Directory administration or internals; or database recovery mechanics for SQL Server, Oracle or PostgreSQL • Comfort in a large existing codebase: reading unfamiliar code, refactoring safely • English for daily work in an international team What You'll Get • 26 paid days off annually, plus 4 extra global VeeaMe Days for self-care and 24 paid volunteer hours annually through Veeam Cares • Paid parental, maternity, and paternity leave • Fully covered family medical plan, dental, rehab, and vaccinations • Life, critical illness, and disability insurance • Employer pension contribution via PPK • Monthly Edenred allowance of 450 PLN for meals • MultiSport card fully covered by Veeam, giving access to sports facilities nationwide • Up to 12 free therapy sessions annually, plus legal and financial advice • Opportunities to learn and grow through on-demand libraries (LinkedIn Learning, O’Reilly), mentoring, workshops and learning events like our annual Global Day of Learni