Senior SysOps Engineer

We're looking for a Senior SysOps Engineer to join our friendly and professional team.

The platform is a high-traffic web service handling tens of millions of requests per day, with a data pipeline processing 50M+ user events daily that feeds both customer-facing analytics and billing. It runs on self-managed infrastructure across two datacenters, with a mix of long-lived legacy components and an active modernization program.

Engagement: full-time (ideally) or part-time (20+ hours/week).
Location: UA/EU, remote.

Required Skills:
5+ years of experience as a SysOps Engineer / Infrastructure Engineer (or similar role).
Strong expertise with OS: FreeBSD (preferred), Linux (Debian, Ubuntu), Jail, Docker, and ZFS optimization.
Database experience: MariaDB/MySQL with master-master, master-slave replication, MyISAM, InnoDB, GTID.
Experience with Redis & Sentinel: setup, replication, and failover strategies.
Experience with Web-servers: Caddy, Lighttpd, Nginx.
Knowledge of ElasticSearch high-load clusters (replication, scaling, performance tuning).
Experience with Cloudflare (DNS management, caching, security configurations).
Experience with Supervisord, Beanstalkd, RabbitMQ.
Networking & security expertise: Strong understanding of network protocols, packet filtering (iptables, ipfw, pf).
Proficiency in scripting & automation: Bash, Python, PHP (or similar).
Experience with PowerDNS and DNS management strategies.
English – B2 and higher (for effective communication with stakeholders).

Responsibilities:
Maintain, manage, and improve the existing infrastructure and platform.
Troubleshoot and resolve issues with critical platform components (ElasticSearch, Redis, FreeBSD, database replication, etc.).
Maintain and update incident runbooks for the on-call teams.
Automate system tasks and reduce manual repetitive work.
Document and optimize deployment processes.
Work on high-availability solutions for branded domains, database failover, and scaling improvements.

Will Be a Plus:
Experience with high-load multi-source database replication, Orchestrator, and ProxySQL.
Knowledge of high-load infrastructure solutions and best practices.

What we offer:

Official B2B contract with a Canadian Company;
Compensation for medical insurance (for our employees based in UA);
Flexible working hours (start at 8.00-11.00 o'clock);
Weekends according to the Ukrainian/Local calendar;
Engaging projects with opportunities for career growth;
Certifications, Udemy courses, Claude;
Corporate events, team-building activities,
Gifts and recognition from the company;
A friendly, open, and supportive team culture without excessive bureaucracy.