Cloud Infrastructure Engineer (Open LMS)

Stack

Responsibilities

• ▹Design, build, and maintain AWS infrastructure using Terraform (EC2, RDS, S3, SQS, Lambda, ALB, ElastiCache, Route 53, VPC)
• ▹Write and maintain Puppet modules to configure fleets of EC2 instances across auto-scaling groups
• ▹Maintain and extend Python-based automation and tooling for platform operations
• ▹Operate and improve distributed service discovery and configuration management (etcd)
• ▹Manage and tune a multi-tier caching strategy (Varnish, Redis/Valkey, PHP OPcache)
• ▹Run and scale the observability stack (Prometheus, Grafana, Loki, Fluentd, PagerDuty), participate in on-call rotations
• ▹Evaluate and implement distributed storage solutions as the platform evolves
• ▹Improve deployment workflows and release processes
• ▹Collaborate with internal teams on API contracts and operational tooling
• ▹Participate in incident response, root cause analysis, and reliability improvements

Requirements

• ▹Strong production AWS experience (EC2, RDS, S3, SQS, Lambda, ALB, ElastiCache, Route 53, IAM, VPC)
• ▹Proficiency authoring and maintaining Terraform modules for production infrastructure
• ▹Proficiency authoring and maintaining Puppet modules (or equivalent) for fleet management
• ▹Solid Python skills, writing and maintaining production daemons
• ▹Deep Linux systems knowledge (Ubuntu): Apache/Nginx, PHP-FPM, Varnish, systemd, filesystem mounts, networking
• ▹Understanding of distributed systems concepts: consensus, leader election, distributed locking, eventual consistency
• ▹Proficiency building observability pipelines (Prometheus, Grafana, Loki or equivalent) in production
• ▹Comfortable in a GitLab-based CI/CD workflow
• ▹Clear communicator able to document architectural decisions

Nice to have

• ▹Hands-on experience with distributed storage systems (Ceph, GlusterFS, JuiceFS, CubeFS, AWS EFS)
• ▹Familiarity with etcd or similar distributed key-value stores (Consul, ZooKeeper)
• ▹Experience with Varnish and VCL, especially dynamic backend routing or multi-tenancy

Soft skills

About the company

The team builds and scales a multi-tenant SaaS hosting platform on AWS that dynamically provisions, manages, and scales hundreds of Moodle LMS instances for education clients, powered by custom orchestration tooling and infrastructure as code.