Senior Reliability Engineer – Platform & Observability

One Identity, LLC; United Kingdom; Remote; GBP 90,000 - 140,000; Full time

Job summary

One Identity’s OneLogin team is seeking Senior Software Engineers who own production systems and drive reliability, observability, and operability across the stack. You’ll tackle complex issues, design for resilience, and apply AI-assisted development approaches to accelerate debugging and root-cause analysis.

The role emphasizes end-to-end ownership—from code to deployment to operation—while collaborating with product teams to reduce incidents and improve system behavior in production

Qualifications

• 4+ years of software engineering experience with ownership of production systems, reliability, or operational improvements.
• Strong backend development experience (Ruby, Node.js, or similar).
• Solid understanding of REST APIs, service contracts, and software design principles.
• Experience working across backend services, APIs, and production systems.

Responsibilities

• Own production operability by debugging complex issues, improving system visibility, and eliminating recurring problems at the source.
• Own production health for services — from detection through resolution to prevention.
• Improve mean time to detect (MTTD), mean time to resolve (MTTR), and recurrence rates for issues.
• Identify systemic issues and eliminate recurring problems through code fixes, architecture improvements, and better operational tooling.
• Improve observability across services — logs, metrics, and alerting — for faster diagnosis and resolution.
• Design and improve debugging workflows, runbooks, and internal tooling for engineers.
• Reduce operational burden by making systems easier to understand, operate, and troubleshoot.
• Partner closely with product teams to feed production learnings back into design and development.
• Reduce support and incident load by addressing root causes and improving system design, not just resolving individual issues.

Skills

Production ownership

Backend development Ruby/Node.js

REST APIs

Distributed systems

On-call readiness

AI tooling interest

Tools

Datadog

CI/CD

AWS

Job description

One Identity’s OneLogin team is seeking Senior Software Engineers who own production systems and drive reliability, observability, and operability across the stack. You’ll tackle complex issues, design for resilience, and apply AI-assisted development approaches to accelerate debugging and root-cause analysis.

The role emphasizes end-to-end ownership—from code to deployment to operation—while collaborating with product teams to reduce incidents and improve system behavior in production