Senior C# Developer: Explorers/Identity Resilience

Greenhouse Software, Inc.; Warszawa; On-site; PLN 180,000 - 260,000; Full time

Job summary

Veeam is seeking a Senior C# Developer to join the Explorers/Identity Resilience team in Warsaw, Poland. You will design and implement recovery flows, build PowerShell cmdlets, and work with SQL Server, Oracle, PostgreSQL, and Active Directory internals.

The role emphasizes server orchestration, long-running operations, and robust integration testing. You will work with REST and gRPC, .NET technologies, and cross‑platform environments (Windows/Linux), contributing to a mature product focused on

Qualifications

• 5+ years of commercial C# product development with deep .NET knowledge.
• Experience designing service APIs (REST, gRPC) with backward compatibility in mind.
• Strong async and multithreading: cancellation and long-running operations.

Responsibilities

• Design end-to-end recovery flows (REST and gRPC); server orchestration and agent execution.
• Build PowerShell cmdlets as a first-class product surface with a coherent object model.
• Design pre-flight validation across REST, server and agent layers; ensure safe restores.
• Work with SQL Server, Oracle, PostgreSQL internals or Active Directory internals (domain controller promotion, SYSVOL, NTDS, DNS, Kerberos).
• Manage long-running distributed sessions: agent deployment, keep-alive, timeout handling, cancellation.
• Own and maintain the integration test suite; keep it green.
• Refactor a long-lived codebase to improve existing functionality while delivering value.

Skills

C# development

Async programming

Multithreading

English communication

Tools

REST

gRPC

PowerShell

Windows Server

Active Directory

Linux

Git

VS/Rider

Job description

Senior C# Developer: Explorers/Identity Resilience

Warsaw, Poland

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
• 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, andpaternity 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 Learning

Please note: If the applicant is permanently present outside of Poland, Veeam reserves the right to refuse to consider the application for a job. A remote job is only possible in case the employee is located in Poland.

Veeam Software is an equal opportunity employer and does not tolerate discrimination in any form on the basis of race, color, religion, gender, age, national origin, citizenship, disability, veteran status or any other classification protected by federal, state or local law. All your information will be kept confidential.

Personal data collected during the recruitment process will be processed in accordance with our Recruiting Privacy Notice , which explains how your information is collected, used, and handled in connection with hiring activities. By applying for this position, you consent to this processing.

By submitting your application, you confirm that the information provided, including any supporting documents, is complete and accurate to the best of your knowledge. Any misrepresentation, omission, or falsification may result in disqualification from consideration or, if discovered after employment begins, termination of employment.