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 Pvt. Ltd. (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