Senior Site Reliability Engineer (SRE)

At OneSpan, we specialize in digital identity and anti-fraud solutions that create exceptional and secure experiences. We are seeking a seasoned Senior Site Reliability Engineer to take technical ownership of our reliability strategy in Delhi NCR. You will lead critical infrastructure initiatives, define standards for observability and incident response, and mentor junior SREs. This is a hands-on role where your decisions will directly shape platform resilience and engineering culture.

Responsibilities

• Lead the design and evolution of large-scale, multi-region infrastructure with a focus on availability, latency, and fault isolation.
• Own the SRE roadmap: define SLIs/SLOs, establish error budget policies, and drive reliability OKRs across engineering.
• Architect and implement observability platforms (metrics, logs, traces) to provide deep system visibility at scale.
• Lead major incident response, coordinate cross-team war rooms, and drive rigorous post-mortems with systemic fixes as part of an on-call rotation (one weekend per month plus weekday daytime coverage in a follow-the-sun model with the team in Canada).
• Evaluate, introduce, and champion new tools and frameworks for infrastructure automation, chaos engineering, and capacity planning.
• Provide technical leadership in design reviews, ensuring reliability and operability are first-class requirements.
• Mentor and grow SRE engineers through code reviews, knowledge sharing, and technical coaching.
• Partner with Engineering, Product, and Security leadership to align platform capabilities with business objectives.
• Drive the reduction of toil across the organization through platform-level automation and self-service tooling.

Requirements

• 8+ years of experience in SRE, platform engineering, or production operations, with at least 3 years at a senior level.
• Expertise in Amazon EKS: cluster lifecycle management, custom node groups, Karpenter or Cluster Autoscaler, multi-cluster strategies, and EKS add-on management.
• Advanced Istio experience: full control plane ownership, Envoy filter customization, multi-cluster mesh federation, traffic shaping for canary/blue-green deployments, and Istio upgrade strategies.
• Advanced AWS architecture skills across EKS, VPC, IAM (IRSA, SCPs, permission boundaries), Route 53, ALB/NLB, RDS, and S3 — with IaC ownership via Terraform.
• Strong networking troubleshooting experience across Kubernetes/EKS and service mesh (Istio), including AWS VPC networking and Transit Gateway; able to trace and diagnose network flows (packet capture analysis experience is a plus).
• Deep GitLab CI/CD expertise: pipeline architecture, GitLab Runners at scale, environment promotion strategies, GitOps workflows, and security scanning integration (experience with GitHub Actions is a plus).
• Advanced proficiency in Python and/or Go for building internal platform tooling and automation frameworks.
• Demonstrated experience defining SLIs/SLOs, enforcing error budgets, and driving reliability OKRs across engineering teams.
• Proven track record leading major incidents, running blameless post-mortems, and delivering systemic architectural improvements.
• Excellent communication skills — able to articulate complex reliability trade-offs to both engineering and executive stakeholders.
• Bachelor's or Master's degree in Computer Science, Engineering, or equivalent practical experience.

Preferred Qualifications

• Prior experience building or scaling an SRE practice from the ground up in a high-growth engineering organization.
• Relevant certifications: CKA, AWS DevOps Engineer Professional, or AWS Solutions Architect Professional.
• Experience with chaos engineering in Kubernetes environments (LitmusChaos, AWS Fault Injection Simulator).
• Familiarity with GitLab Advanced Security features: DAST, SAST, dependency scanning, and secret detection in CI pipelines.