Cloud Infrastructure Engineer (Open LMS) Hungary, Remote
Lietuvos Geležinkeliai2 months ago
Remote, HungarySenior
Responsibilities
- Design, build, and maintain AWS infrastructure using Terraform across EC2, RDS, S3, SQS, Lambda, ALB, ElastiCache, Route 53, and VPC networking.
- Write and maintain Puppet modules to configure and manage EC2 fleets across multiple auto-scaling groups.
- Maintain Python-based production automation, tooling, and daemons supporting platform operations.
- Operate distributed service discovery and configuration management using etcd.
- Manage and tune caching with Varnish, Redis/Valkey, and PHP OPcache.
- Run and scale observability systems including Prometheus, Grafana, Loki, Fluentd, and PagerDuty.
- Evaluate and implement distributed storage solutions as the platform evolves.
- Improve deployment workflows and release processes for non-containerized infrastructure.
- Collaborate with internal teams on API contracts, integration patterns, and operational tooling.
- Participate in on-call rotations, incident response, root cause analysis, and platform reliability improvements.
Requirements
- Strong production experience with AWS services, particularly EC2, RDS, S3, SQS, Lambda, ALB, ElastiCache, Route 53, IAM, and VPC networking.
- Proficiency authoring and maintaining Terraform modules for production infrastructure.
- Proficiency authoring and maintaining Puppet modules or equivalent agent-based configuration management for fleet management.
- Solid Python skills, including maintaining production daemons and automation tooling.
- Deep Linux systems knowledge, particularly Ubuntu, with familiarity with Apache, Nginx, PHP-FPM, Varnish, systemd, filesystem mounts, and networking fundamentals.
- Understanding of distributed systems concepts including consensus, leader election, distributed locking, eventual consistency, and related tradeoffs.
- Production experience building and maintaining observability pipelines with Prometheus, Grafana, Loki, or equivalent tools.
- Comfort working in a GitLab-based CI/CD workflow.
- Ability to document architectural decisions and explain technical tradeoffs to technical and non-technical stakeholders.
- Preferred: experience with distributed storage systems such as Ceph, GlusterFS, JuiceFS, CubeFS, or AWS EFS.
- Preferred: familiarity with etcd or comparable distributed key-value stores such as Consul or ZooKeeper, including watch APIs, TTL-based locking, and cluster operations.
- Preferred: experience with Varnish and VCL, especially dynamic backend routing or multi-tenant configurations.
- Preferred: working knowledge of PHP for maintaining infrastructure-to-application integration scripts.
- Preferred: multi-tenant SaaS platform design experience, especially database-per-tenant models on shared infrastructure.
- Preferred: familiarity with Moodle LMS or education technology platforms.
- Preferred: experience with AWS Secrets Manager, HashiCorp Vault, or Parameter Store and automated credential rotation.
- Preferred: experience designing zero-downtime deployment strategies for VM-based, non-containerized environments.