Linux Systems Administrator / DevOps Engineer
Read straight from CodeForce's careers page, verified 3d ago.Seekless can tailor your résumé to it.
Seekless can write your résumé for this posting first.
Before you apply
LocationKarachi, Sindh, Pakistan
Work moderemote
Typefull-time
SeniorityMid
Experience3+ yrs
DepartmentIT Developement
Company size2+ people
PostedSep 22, 2026 · 1mo ago
Verified live3d ago
At a glanceSummarised by Seekless from the posting.
3+ years Linux administration / DevOps experience
Strong Debian/Ubuntu experience
Strong Linux troubleshooting
NGINX
Node.js production environments
PM2
PostgreSQL
Docker
Networking
Bash scripting
Git
Monitoring/logging
Strong production troubleshooting ability
FreeSWITCH
OpenSIPS
FusionPBX
SIP/RTP
Wireshark
sngrep
Prometheus
Grafana
Loki
Netdata
Ansible
Redis
WebSockets
CI/CD
OVH/Vultr/AWS infrastructure
Skills
Linux
Debian
Ubuntu
Node.js
TypeScript
PM2
NGINX
PostgreSQL
FreeSWITCH
OpenSIPS
Docker
Grafana
Prometheus
Loki
Netdata
Bash
Python
JavaScript
Ansible
Git
FusionPBX
Redis
Wireshark
sngrep
CI/CD
OVH
Vultr
AWS
Linux Systems Administrator / DevOps Engineer
About the role
**Company:** Dataphone
**Employment:** Full-Time
**Location:** Remote
About Dataphone
Dataphone operates a large-scale communications platform providing VoIP, PBX, Contact Center, SMS, AI voice, and business communication solutions.
Our production environment includes Linux servers, Node.js/TypeScript applications, PM2, NGINX, PostgreSQL, FreeSWITCH, OpenSIPS, Docker, monitoring systems, and multiple customer-facing services.
We are looking for a hands-on **Linux Systems Administrator / DevOps Engineer** who can take ownership of this infrastructure and help us keep it reliable, secure, and scalable.
Responsibilities
Linux Server Administration
* Manage production Debian/Ubuntu Linux servers
* Server provisioning, configuration, upgrades, patching, and hardening
* Manage CPU, memory, storage, processes, services, and networking
* Troubleshoot production outages and performance problems
* Manage SSH, users, permissions, sudo, and security
* Monitor server health and capacity
* Perform server migrations and maintenance with minimal downtime
* Maintain backups and disaster-recovery procedures
Node.js / TypeScript Application Infrastructure
* Deploy and maintain Node.js/TypeScript applications
* Manage applications running under **PM2**
* Troubleshoot application crashes and memory leaks
* Monitor PM2 processes, CPU, memory, restarts, and logs
* Configure PM2 clusters and process management
* Perform application deployments and rollbacks
* Troubleshoot application/server interactions
* Work with developers to resolve production issues
* Help establish standardized deployment procedures
You do **not** need to be a full-time application developer, but you must understand how Node.js applications run in production and be comfortable troubleshooting them.
NGINX
* Configure and maintain NGINX
* Reverse proxy configuration
* SSL/TLS certificates
* HTTP/HTTPS routing
* Load balancing
* WebSocket proxying
* Connection and timeout configuration
* Troubleshoot 4xx/5xx errors
* Configure security headers and access controls
* Review NGINX access/error logs
* Optimize NGINX for production traffic
PostgreSQL
* Manage production PostgreSQL servers
* Monitor database health and performance
* Troubleshoot connection issues
* Monitor CPU, memory, disk, locks, and connections
* Perform backups and restores
* Understand indexes and basic query performance
* Assist developers with database-related production issues
* Support replication/high-availability configurations
VoIP Infrastructure
* Maintain and troubleshoot **FreeSWITCH**
* Maintain and troubleshoot **OpenSIPS**
* Troubleshoot SIP registration and call-routing problems
* Analyze SIP/RTP traffic
* Use Wireshark, tcpdump, and sngrep
* Troubleshoot NAT, RTP, codecs, packet loss, and latency
* Monitor telecom infrastructure
* Assist with scaling and load balancing
Docker
* Manage Docker containers
* Troubleshoot containers that fail or restart
* Manage Docker networking and volumes
* Monitor container resources
* Maintain Docker-based production services
* Assist with containerizing additional applications
Monitoring & Logging
Maintain and improve monitoring across the infrastructure.
Experience with:
* Grafana
* Prometheus
* Loki
* Netdata
* Linux system logs
* NGINX logs
* PM2 logs
* Application logs
* PostgreSQL monitoring
* FreeSWITCH/OpenSIPS logs
The goal is to identify infrastructure problems **before they become customer-impacting outages**.
Networking
Strong understanding of:
* TCP/IP
* DNS
* HTTP/HTTPS
* WebSockets
* TCP/UDP
* NAT
* Firewalls
* Routing
* VLANs
* Public/private networking
* SIP/RTP networking
Automation
* Bash scripting
* Python and/or JavaScript/TypeScript scripting
* Ansible or similar configuration-management tools
* Git
* Automate repetitive server-management tasks
* Create scripts for monitoring, deployment, maintenance, and troubleshooting
Production Troubleshooting
This role requires someone who can independently investigate problems such as:
* Node.js application repeatedly crashing
* PM2 process consuming excessive memory
* NGINX returning 502/504 errors
* WebSocket connections dropping
* PostgreSQL connections becoming exhausted
* Server running out of disk space
* FreeSWITCH CPU suddenly increasing
* SIP registrations failing
* Calls connecting without audio
* OpenSIPS routing failures
* Docker containers repeatedly restarting
* Network latency or packet loss
* SSL certificate expiration
* High server load
* Application deployment causing an outage
The expectation is:
**Detect → Investigate → Identify root cause → Fix → Verify → Document**
Required Skills
Must Have
* 3+ years Linux administration / DevOps experience
* Strong Debian/Ubuntu experience
* Strong Linux troubleshooting
* NGINX
* Node.js production environments
* PM2
* PostgreSQL
* Docker
* Networking
* Bash scripting
* Git
* Monitoring/logging
* Strong production troubleshooting ability
Preferred
* FreeSWITCH
* OpenSIPS
* FusionPBX
* SIP/RTP
* Wireshark
* sngrep
* Prometheus
* Grafana
* Loki
* Netdata
* Ansible
* Redis
* WebSockets
* CI/CD
* OVH/Vultr/AWS infrastructure
Ideal Candidate
The ideal candidate is **not someone who only knows how to follow a checklist**.
We need someone who can receive a problem such as:
“The API is slow and customers are getting intermittent 502 errors.”
…and independently work through:
**NGINX → PM2 → Node.js → PostgreSQL → Linux → Network**
to determine where the actual problem is.
You should be comfortable logging into a server, examining processes and logs, running diagnostics, making a controlled change, verifying the result, and documenting the solution.
Work Style
We are looking for someone who:
* Takes ownership
* Works independently
* Is a strong problem solver
* Doesn’t require constant supervision
* Can work during production incidents
* Communicates clearly
* Documents changes
* Understands the importance of uptime
* Knows when to escalate an issue
* Continuously improves infrastructure rather than simply maintaining it
Technical Assessment
Candidates may be required to complete a practical assessment covering:
1.
Linux troubleshooting
2.
NGINX configuration
3.
PM2/Node.js troubleshooting
4.
PostgreSQL troubleshooting
5.
Networking
6.
Docker
7.
FreeSWITCH/OpenSIPS fundamentals
8.
Monitoring and log analysis
The assessment will focus on **real-world troubleshooting and problem-solving rather than memorization**.
Compensation
Compensation will be based on experience, technical ability, and location.
Candidates with strong production experience in Linux, Node.js/PM2, NGINX, PostgreSQL, and VoIP infrastructure may qualify for higher compensation.
More roles at CodeForce