60% Web Developer 30% Linux Sysadmin 10% Tech Support

Description du poste:



Lightup Network Solutions GmbH & Co. KG is a small ISP and telecommunications service provider (VoIP) based in Frankfurt, Germany. Lightup's team is 100% remote, distributed worldwide (Germany, Portugal, Serbia, Morocco, Brazil, Colombia) and consists currently of just 7 mostly non-tech people. Now we need a hybrid Web Dev / Sys Admin tech pro to join our small team. Lightup was established in 1998 as a ISP focused on webhosting and dedicated servers. Since 2011 Lightup has shifted its core business towards internet-based telecommunication services, primarily so-called DIDs a.k.a. virtual telephone numbers along with international retail and wholesale call termination (VoIP, SIP). In 2022 Lightup became a licensed telecom operator in Switzerland and the wholesale business has been booming since then.

Your tasks would be:

  • Short-term (now - 6 months): Create multiple new commercial telecom-oriented web-based services from scratch based on the team's ideas (PHP + MySQL preferred, but really up to you)
  • In the mid-term (6 - 12 months), create, re-design & code from scratch successor sites for outdated Joomla-based sites
  • Create Linux console-based or web-based scripts and tools to support the team, such as customer accounting scripts / accounting & billing automation or VoIP buy- and sell-rates output automation (Bash, Perl, python, PHP - your choice)
  • Take care of 30+ KVM-based VMs and the 20+ underlaying physical servers running CentOS
  • Keep CentOS installations updated, migrate those which are too old to new installations
  • Set up new VoIP customers in our VoIP system / cluster (Asterisk, Kamailio)
  • Analyze, troubleshoot and fix SIP and DID call issues / Work & communicate with vendors and customers alike
  • Provide technical customer & order support for our 2 Joomla-based retail telecom services
  • Create a new API from scratch for lawful interception compatibility / requests
  • Constantly communicate with the team (WhatsApp, Slack) and help them to make their non-tech jobs easier by the creation of cool & useful new tools

Some commands / tools that should be familiar:

  • vim and vi
  • ssh, rsync
  • sort, cut, tail, head
  • awk, sed, tr, wc
  • grep, uniq, paste, join, shuf
  • top (and understand what you're seeing)
  • ps (and understand what you're seeing)
  • ifconfig, netstat, tcpdump, ping, traceroute, mtr, whois
  • ls, cd, cp, mv, rm, cat, echo, mkdir, find, date, df
  • screen, less, more
  • yum
  • (Bonus: sngrep, kamctl, sipsak)

If you're not typing most of these commands multiple times on a daily basis into your SSH client or into your local console then you can stop reading at this point and skip to the next job offer. Else, since you are a Linux console person, please read on...

Some server daemons, binaries and tech that you'll be dealing with:

  • Apache / httpd
  • MySQL / MariaDB / mysqld / mysql
  • sshd
  • KVM / qemu / vncserver
  • cron
  • iptables
  • Bash
  • ProFTPD
  • Asterisk
  • pssh
  • Kamailio
  • X / GNOME
  • tinydns / dnscache
  • Nagios
  • Sendmail, postfix, exim, SpamAssassin, Dovecot (via DirectAdmin)
  • MRTG
  • IPMI / KVM-over-IP
  • BackupPC
  • (Optional network admin bonus: Juniper M- and SRX-series routers, HP ProCurve switches, vrrp, BGP, RIPE)

Minimum languages that you'll need, software and protocols that you'll have to either already know or learn:

  • Bash Shellscript
  • PHP
  • Joomla (from scratch, heavily modified, forget click-to-install modules/add-ons)
  • MySQL / MariaDB
  • Apache Webserver
  • SIP
  • Asterisk

This is a freelancer position, meaning you'll be responsible for taking care of paying taxes, health insurance, social insurance, pension fund etc. by yourself.

You'll be working just 6 hours per day, not 8 hours. But since Lightup's team is global and so are our customers those 6 hours will be spread over the course of a day European time (CET, Berlin) between 10:00 and 22:00. Imagine it like 12 hours standby per day (WhatsApp, Slack, E-Mail) but effectively 6 hours will be dedicated to Web Development, Sys Admin and Tech Support tasks.

Your profile:

  • Highly self-motivated & independent, but still a team player
  • Good communicator, friendly attitude
  • Flexible, curious to learn & try new
  • Very accurate, with tendency to perfectionism
  • You're working careful and exact, and you re-read your changes multiple times before you actually save the file
  • Multiple years Linux experience & created multiple web-based services (PHP + MySQL or comparable) from scratch
  • You are a real coder, you don't drag & drop buttons and menus and call that coding
  • You can edit / read / write code with a text editor on your Linux console and you actually understand what you're reading and writing

Education, age, gender not important. Yes, we're looking for a Linux / Web Dev geek / pro. If you're living in your mothers basement for the last 10 years that's OK. If you're never leaving your appartment that's OK too. If you're happily married and have 4 children that's fine too. Coding on laptop is inefficient and slow, so if you are a nomad you need at least a real keyboard + mouse or you'll be too slow.

Thank you for reading until this point and looking forward to read from you via E-Mail! :-) -> jobs@lightupnet.de

Please mention the word **COHERENCE** and tag RMzQuODIuMjA2LjIy when applying to show you read the job post completely (#RMzQuODIuMjA2LjIy). This is a beta feature to avoid spam applicants. Companies can search these words to find applicants that read this and see they're human.

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