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.