Senior Backend Engineer (Systems & Production) Perm Role Cork - Hybrid 1 day week onsite
A client of mine is hiring a senior backend engineer to focus on how systems behave in production. The successful candidate will work across a distributed, event-driven SaaS platform, improving performance, reliability, and correctness at scale. This role sits between backend engineering and production systems, shaping how services are designed, built, and operate under real-world conditions.
The Job
Improve system performance, scalability, and reliability under real production load
Identify inefficiencies in code, data models, and service interactions
Design for safe retries, idempotency, and predictable behaviour
Contribute to backend services in C# / .NET
Debug complex issues across distributed systems and async workflows
Improve observability (logging, metrics, tracing) so systems are diagnosable
Influence engineering standards, design decisions, and code quality across teams
Have you
Strong backend experience in C# / .NET (or similar)
Experience working on complex, distributed systems (not just CRUD apps)
Ability to reason about concurrency, failure modes, and eventual consistency
Experience diagnosing performance issues and data-related bottlenecks
Solid understanding of SQL and/or NoSQL at scale
Pragmatic mindset with a focus on root cause analysis and real-world behaviour
Experience with event-driven or actor-based systems (e.g. Akka.NET)
Experience in multi-tenant SaaS platforms
Familiarity with Kubernetes and CI/CD
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