Senior DevOps / Infrastructure Engineer

United States Digital Space LLC; United States; Remote; USD 120,000 - 170,000; Full time

Benefits offered by this job

Fully remote

Weekend off

Job summary

United States Digital Space LLC is seeking a Senior DevOps / Infrastructure Engineer to design, build, and maintain a high‑performance, globally distributed infrastructure. You will work with Linux systems, deep networking, kernel tuning, VPNs, and advanced monitoring to ensure security and reliability.

You will develop architecture and operate CI/CD pipelines using GitLab, Ansible, and Terraform; tune Linux for high load; and build monitoring templates, auto‑discovery, and alerting with Zabbix

Qualifications

• Extensive Linux experience with kernel tuning and high‑load systems.
• Strong background in networking, security, and monitoring architectures.
• Proven ability to automate complex infrastructure tasks and build reliable CI/CD pipelines.

Responsibilities

• Develop and evolve infrastructure architecture for stability, scalability, and high availability.
• Build and automate CI/CD pipelines using GitLab, Ansible, and Terraform.
• Maintain and optimize Linux systems for high‑load environments, including kernel tuning and network performance."
• Configure and improve monitoring systems (Zabbix, Grafana) with templates, auto‑discovery, and alerting logic.
• Manage and optimize VPN technologies (StrongSwan, OpenVPN, Xray).
• Analyze incidents, identify root causes, and implement long‑term fixes.
• Ensure infrastructure security through access control, firewalls, updates, and 2FA.
• Collaborate with development and QA teams in a distributed environment.
• Participate in architectural decisions and guide the team on best practices.

Skills

Linux systems

Networking

Monitoring & metrics

VPN technologies

CI/CD automation

Kernel tuning

Automation scripting

Cloud & virtualization

Tools

GitLab

Ansible

Terraform

Proxmox

Docker

Kubernetes

AWS

Job description

Headquarters: Remote Island Lake Argyle, Remote, 6743 Australia

A Senior DevOps / Infrastructure Engineer in this role is responsible for building, optimizing, and maintaining a high‑performance, secure, and globally distributed infrastructure. The position requires deep expertise in Linux systems, networking, monitoring, VPN technologies, and traffic‑evasion techniques used in modern privacy‑focused environments.

About the Role You will design and operate mission‑critical infrastructure that supports large‑scale, high‑load systems. The work goes far beyond container management: it involves kernel‑level tuning, advanced networking, VPN stack engineering, and building monitoring systems from the ground up. This is a role for someone who understands how systems behave under pressure and knows how to automate everything that repeats.

Key Responsibilities

• Develop and evolve infrastructure architecture to ensure stability, scalability, and high availability.
• Build and automate CI/CD pipelines using GitLab, Ansible, and Terraform.
• Maintain and optimize Linux systems for high-load environments, including kernel tuning and network performance adjustments.
• Configure and improve monitoring systems (Zabbix, Grafana), including custom templates, auto‑discovery, and alerting logic.
• Manage and optimize VPN technologies such as StrongSwan, OpenVPN, and Xray.
• Analyze complex incidents, identify root causes, and implement long‑term fixes.
• Ensure infrastructure security through access control, firewall management, updates, and 2FA.
• Collaborate with development and QA teams in a distributed environment.
• Participate in architectural decisions and guide the team through best practices.

Core Skills and Expertise Monitoring Engineering Advanced proficiency with Zabbix and Grafana , including:

• custom templates,
• auto‑discovery rules,
• external scripts,
• alerting pipelines,
• performance dashboards.

Linux & Kernel Optimization Deep understanding of kernel and OS tuning for high‑load systems:

• network I/O optimization,
• socket buffer tuning,
• IRQ affinity and CPU interrupt balancing,
• NIC queue configuration,
• sysctl tuning for throughput and latency.

VPN Technologies Hands‑on experience configuring and optimizing:

• StrongSwan (IPsec) ,
• OpenVPN ,
• Xray-core (VLESS/REALITY, VMess, Shadowsocks).

DPI Evasion & Traffic Obfuscation Knowledge of DPI/TSPU architecture and modern circumvention techniques:

• domain fronting,
• SNI masking,
• ECH (Encrypted Client Hello),
• REALITY,
• uTLS fingerprinting.

Additional Technical Areas Scripting: Bash, sed, awk; Go or Python for tooling and automation.

Virtualization: Proxmox, Docker, Portainer.

Networking: firewalls (nftables/iptables), routing, PBR, VLANs, GRE/IPIP tunnels, tun/tap, veth, bridges.

Databases: PostgreSQL or MySQL (schema design, optimization, replication basics).

Automation: Ansible, Terraform.

Cloud: AWS, Cloudflare, Hetzner.

Logging: Elastic Stack, OpenSearch, Vector, Promtail, Loki.

Kubernetes on bare metal: deployment, CNI, storage, operations.

Secrets management: Infisical.

Who Thrives in This Role

• Engineers who understand systems deeply and enjoy solving complex infrastructure problems.
• People who automate everything and dislike repetitive manual work.
• Those who can take ownership of critical systems and support the team with expertise.
• Individuals comfortable working in distributed teams and communicating clearly in English.

What the Company Offers

• Fully remote, full‑time position with weekends off.
• Work with international, high‑impact projects.
• Opportunities for professional growth and specialization.
• Competitive salary based on experience.
• A young, friendly, and technically strong team.