Senior DevOps Engineer

Responsibilities:

• Scale the Network: Architect and maintain a global network to ensure high availability and sub-millisecond latency for real-time messaging.
• Protocol Optimization: Ensure maximum network throughput by optimizing every packet from TCP window scaling to TLS handshake efficiency.
• OS and Kernel Tuning: Optimize file descriptors, memory allocation, and the Linux networking stack to ensure maximum performance on each messaging server.
• Infrastructure as Code: Automate the provisioning of global Points of Presence (PoPs) using Terraform and Ansible to maintain a "five nines" (99.999%) uptime.
• Traffic Engineering: Design and manage L4/L7 load balancing (NGINX, HAProxy) and implement routing strategies.
• Security and Privacy: Implement and audit cryptographic protocols and zero-trust networking to ensure user privacy remains uncompromised.
• Observability: Deploy deep-packet inspection tools and monitoring (Prometheus, Grafana, Wireshark, OpenTelemetry, Loki) to diagnose bottlenecks.

Requirements:

• Networking Savvy: You have a solid grasp of the OSI model and understand how the internet actually works, from 3-way handshakes to BGP peering.
• Performance Obsessed: You hate bloat and latency; you constantly keep optimizing and simplifying even if not asked to.
• Linux Expert: You are at home in a Linux-based environment and can debug a kernel panic or a network partition with ease.
• Curious and Scrappy: You have a history of breaking (and fixing) complex systems and likely have a home lab full of networking gear.

The Tech Stack:

• Networking: TCP/IP, UDP, DNS, and Anycast routing.
• Infrastructure: GCP (VPC, Cloud Armor, GKE) or AWS equivalents.
• Containers: Docker and Kubernetes (Deep understanding of CNI and service mesh).
• Languages: Python or Bash for high-performance networking tools and automation.
• Load Balancing: HAProxy, NGINX, and Cloud Load Balancers.
• Observability: Prometheus, Grafana, OpenTelemetry, Loki.
• CI/CD: GitHub Actions, ArgoCD, Jenkins.
• Queue: Kafka, Redis.
• Infrastructure as code: Terraform.

Bonus Points:

• Experience with WebSockets, MQTT, or GRPC protocols.
• Certs or deep experience in Advanced Cloud Networking (GCP/AWS).
• Contributions to open-source networking or infrastructure projects.