Senior Software Engineer Hybrid Infrastructure

Virtuozzo Inc.; Remote; PLN 252,000 - 337,000; Full time

Job summary

A leading hybrid infrastructure company in Kraków is seeking an experienced engineer to join their team. You will focus on architecting and implementing innovative features for hybrid cloud platforms while optimizing performance-critical code and maintaining high-quality standards. Ideal candidates should have expert skills in programming languages such as Python or C++, solid experience with Linux kernel architecture, and a strong understanding of networking fundamentals. This position offers flexible working hours and a competitive compensation package.

Benefits

Group private medical insurance

Training budget and certification support

Flexible remote working hours

Recognition programs and referral bonuses

Qualifications

• Strong experience developing systems in Python, Rust, Go, or C/C++.
• Expertise in Linux kernel process scheduling, memory management, and syscalls.
• Ability to troubleshoot complex production environments.

Responsibilities

• Architect and implement features for cluster orchestration and VM management.
• Maintain automated tests to ensure code quality.
• Optimize performance and refactor legacy components.

Skills

Expert-level proficiency in Python, Rust, Go, or C/C++

Deep expertise in Linux kernel architecture

Strong grasp of networking fundamentals (TCP/IP, routing, SDN)

Proven ability to solve intricate, ambiguous problems

Tools

Docker

Kubernetes

Ansible

Job description

About Virtuozzo

Virtuozzo is a leading innovator in virtualization and cloud infrastructure solutions, empowering service providers worldwide to build and manage any cloud—private, public, or hybrid—efficiently and cost-effectively. We pioneered container-based virtualization technologies and actively contribute to foundational OSS projects such as OpenVZ, Linux kernel, Kubernetes, CRIU, KVM, OpenStack, and more.

The Role

Join Virtuozzo's elite engineering team building Virtuozzo Hybrid Infrastructure, a cutting‑edge platform empowering service providers to deliver scalable, software‑defined data centers. We orchestrate distributed storage, virtualization, cluster management, high availability, VM lifecycle, system monitoring, and zero‑downtime updates via intuitive UI and REST APIs. If you thrive on solving real‑world infrastructure challenges at scale, this is your chance to shape the future of hybrid cloud.

Key Responsibilities

• Architect and implement innovative features for cluster orchestration, VM management, and high‑availability systems.
• Build and maintain comprehensive automated tests (unit, integration, E2E) to drive exceptional code quality.
• Optimize performance‑critical codepaths and refactor legacy components for reliability and efficiency.
• Troubleshoot and support production environments for global customers, turning insights into product improvements.

Required Skills & Experience

• Expert‑level proficiency in Python, Rust, Go, or C/C++ with a track record of production‑grade systems.
• Deep expertise in Linux kernel architecture, including process scheduling, memory management, and syscalls.
• Strong grasp of networking fundamentals (TCP/IP, routing, SDN) and distributed systems principles.
• Proven ability to dissect and solve intricate, ambiguous problems under pressure.

Preferred Skills (Standout Plus)

• Hands‑on experience with hypervisors (KVM, etc.), containers (Docker, Podman), or orchestration (Kubernetes).
• Background in distributed storage, fault‑tolerant systems, or system‑level programming.
• Knowledge of kernel internals across Linux, Windows, or FreeBSD.
• Proficiency in automation tools like Ansible, Bash, Terraform, or IaC practices.
• Exposure to cloud platforms (AWS, Azure, GCP) and web tech (JavaScript, HTML/CSS for UI).

Why Virtuozzo?

Work on battle‑tested tech used by millions, collaborate with world‑class engineers, and enjoy flexible remote options, competitive compensation, and growth opportunities in a company pushing hybrid infrastructure boundaries. Apply now and build the infrastructure that powers tomorrow.

What We Offer

• Remote and flexible working hours anywhere in EMEA.
• Group private medical insurance.
• Professional growth: training budget, certification support, mentorship, and career progression pathways.
• Inclusive, multicultural team: work alongside talented engineers from across the globe on infrastructure‑grade cloud products.
• Employee perks: recognition programs, referral bonuses, and learning initiatives such as book clubs or tech talks.
• Share options – shares in our success with share options.