Position: Team Lead | Senior Perl/Ruby developer | DevOps Engineer
Category: Ruby
English level: fluent
Years of experience: 11

I had been the lead developer and later the CTO of SMS-Aggregator Ltd payment gateway which was processing more than half of Ukrainian paid SMS traffic. 

For another 4 years, I had been developing UK2 Group's control panel and billing. My main responsibilities were: cPanel (including licensing) and ComodoSSL/Sectigo integrations as well as integrating payment gateways, ending being their lead developer/ dev manager.

I've spent around 3 years in Cloudbeds (in the core team of the MyAllocator subproject).  My job there is probably 50/50 DevOps /programming since mostly I was dealing with scaling/performance issues, as well as deployment pipelines:
1) During the first year eliminated all the bottleneck and common system failures (i cannot go into details because of the NDA but that was a tough part)
2) Dockerized their system and created a docker-compose based development environment
3) Rewrote schedulers of all workers, since the previous implementation was stateful which prevents containerization. 
4) Introduced integration testing for all critical subsystems
5) Replaced a lot of self-developed things with available libraries and frameworks for devs not to spend time re-inventing the wheel.
I believe that I was a person who solved most of the critical issues during that period.  

Can provide contacts of all my previous direct managers for recommendations.
Have over fifteen years of software development/systems administration experience which includes about five years of working in leading positions. Comfortable with most popular development methodologies. 90% of my experience comes from Perl related stack, but from time to time I take Ruby jobs (mostly where it is the second language) to keep my Ruby skills in shape. Right now I'm deciding what to do since there are no interesting Perl jobs available on the market. Hence Ruby, which is my second language of preference.
Exclusively product companies, please.

I'm searching for a product company that prefers coding skills (and operating systems knowledge) over experience in a certain language.