Server Backend Developer for Imunify360 (remote-only, Europe)

Imunify360 Security Suite is a product of CloudLinux Inc., the maker of the #1 OS in security and stability for hosting providers. Imunify is an innovative security solution designed specifically for shared and VPS/Dedicated servers. The automated, easy-to-use solution with the six-layer approach to security delivers comprehensive and complete attack prevention. Check out our website for more information: imunify360.com.

We are looking for a dynamic and experienced Backend Developer to join our Server Team. In this role, you will design, build, and maintain highly scalable backend systems that power Server, ensuring reliability, performance, and seamless customer experience. You will work on a large-scale infrastructure, collaborate with cross-functional teams, and help shape the future of the product. The position is fully remote with flexible hours, allowing you to plan your day and work from anywhere in the world.

Join us and take your career to the next level!

Key Responsibilities:

• Designing, building, and maintaining backend services for the Imunify360 server platform;
• Developing and improving high-throughput, fault-tolerant messaging and data processing pipelines;
• Operating and maintaining core server components, including proxies, message brokers, caches, and databases;
• Investigating and resolving complex issues in distributed systems, ensuring uptime and reliability;
• Writing and maintaining unit/integration tests to ensure robust, maintainable code;
• Collaborating with Infrastructure, Monitoring, and other product teams to refine architecture and optimize system performance;
• Monitoring production services using Grafana, Telegraf, and related tooling, proactively addressing bottlenecks and scaling challenges;
• Improving CI/CD pipelines for automated, efficient deployments;
• Participating in design reviews, incident analysis, and contributing to the long-term technical vision of the team.

To thrive in this role, you should have:

• 3+ years of professional experience as a Backend Developer;
• Proficiency in Python (asyncio-based development is a must);
• Hands-on experience with distributed systems and messaging frameworks such as RabbitMQ, Kafka (or similar);
• Experience with MongoDB and Redis (including distributed caching and local RPC use cases);
• Familiarity with ClickHouse (or other columnar databases) for large-scale analytics;
• Practical experience with Docker for local development and production environments;
• Experience with HAProxy or similar load balancing/proxy solutions;
• Strong understanding of high-throughput service design and distributed system challenges;
• Familiarity with CI/CD pipelines, version control (Git), and automated deployment workflows;
• Excellent debugging skills, with the ability to deep-dive into network, data, and system-level issues;
• Strong communication and collaboration skills, comfortable working in a distributed team;
• At least upper-intermediate proficiency in spoken and written English.

Nice to have:

• Experience with configuration management systems (e.g., Ansible, Puppet, Salt);
• Experience working with monitoring and metrics stacks (Grafana, Graphite, Telegraf);
• Experience with DNS systems (Unbound or similar).

We value developers who are:

• Curious and fearless problem solvers – not afraid to dig into existing systems, investigate root causes, and propose improvements;
• Pragmatic and detail-oriented – focused on building reliable, maintainable systems;
• Team players – comfortable collaborating in a distributed team environment and contributing to a shared mission;
• Effective communicators – able to articulate ideas clearly, exchange feedback constructively, and foster collaboration across teams;
• Engaging and proactive – contributing energy, initiative, and a positive presence that strengthens team culture.