Senior Site Reliability Engineer

**Senior Site Reliability Engineer (SRE) – Healthcare Infrastructure** **Location:** SMCHS, Block B, Karachi **Job Type:** Full\-Time (Onsite) **Timings:** 8:00 PM – 5:00 AM (US Shift) **Company:** SMB Services *(Hiring for a US\-based Healthcare Technology Client)* **Role Overview** We are looking for an experienced Senior Site Reliability Engineer (SRE) to take full ownership of cloud infrastructure for a US\-based healthcare platform. The system processes real\-time pharmacy claims for patients requiring critical and life\-saving medications. As a result, system reliability, performance, and security are mission\-critical. This is a high\-impact, ownership\-driven role focused on building scalable, secure, and highly reliable infrastructure while improving deployment speed and operational efficiency. **The Environment** **You will be working on a production system that includes:** * Rails 8 backend with React 18 frontends (deployed on AWS \& Vercel) * Real\-time claims processing with zero\-downtime expectations * HIPAA\-compliant systems requiring strict security, auditing, and access control * Increasing transaction volumes requiring scalable infrastructure * CI/CD pipelines (GitHub Actions) with room for optimization * Monitoring stack including New Relic, Sentry, and Datadog **Key Responsibilities** **Infrastructure Ownership** * Design, manage, and scale AWS infrastructure (EC2, RDS, S3, VPC, IAM, networking) * Own system reliability, availability, and performance **Infrastructure as Code (IaC)** * Build and maintain infrastructure using Terraform, CloudFormation, or similar tools * Ensure infrastructure is version\-controlled, reproducible, and review\-driven **CI/CD Optimization** * Improve and redesign CI/CD pipelines (GitHub Actions) * Reduce deployment time while ensuring safe and reliable releases **Observability \& Monitoring** * Implement robust logging, monitoring, and alerting systems * Improve instrumentation to proactively detect and resolve issues **Production Support \& Debugging** * Troubleshoot production issues across infrastructure and application layers * Optimize database and system performance where required **Security \& Compliance** * Ensure infrastructure meets HIPAA compliance standards * Implement encryption, access controls, audit logging, and disaster recovery **Success Metrics** **Within 6 Months** * Deployment time significantly reduced * Issues identified proactively through monitoring * Infrastructure fully managed via Infrastructure as Code * Improved staging validation to prevent production issues * Runbooks created for key operational processes **Within 12 Months** * Auto\-scaling infrastructure handling traffic spikes efficiently * Disaster recovery processes tested and validated * Faster and more reliable CI/CD pipelines * Optimized infrastructure costs without compromising performance * Scalable foundation built to support future growth **Required Experience \& Skills** **Core Experience** * 5\+ years in SRE, DevOps, or Infrastructure Engineering * Strong expertise in AWS (EC2, RDS, S3, VPC, IAM, CloudWatch) * Experience with Infrastructure as Code (Terraform / CloudFormation) * Proven experience designing and optimizing CI/CD pipelines * Strong understanding of observability (metrics, logs, traces) **Technical Skills** * Linux system administration and debugging * Docker and containerization (ECS/EKS preferred) * MySQL or PostgreSQL performance tuning * Ability to write/read code (Ruby, Python, or similar) * Experience with monitoring tools (Datadog, New Relic, Prometheus, Grafana) **Security \& Compliance** * Strong understanding of IAM, encryption, and network security * Experience with HIPAA, SOC 2, or similar compliance frameworks is a plus **Preferred (Nice to Have)** * Experience in healthcare, fintech, or regulated environments * High\-throughput or real\-time systems experience * Event\-driven or streaming architectures * Elasticsearch operations * Background job systems (e.g., Sidekiq) * Incident management and post\-mortem analysis * Infrastructure migration or modernization projects **Why Join This Role** * Full ownership of infrastructure and technical decisions * Opportunity to redesign and improve critical systems * Direct impact on healthcare technology and patient experience * Exposure to a broad and modern tech stack * Focus on reliability, security, and engineering excellence **Tech Stack** **Application** * Rails 8, React 18 * MySQL 8\.0, Elasticsearch * Solid Queue, EventMachine **Infrastructure** * AWS (EC2, RDS, S3, VPC) * Docker * Vercel * GitHub Actions * New Relic, Sentry, Datadog