About Us
Paysera is the first fintech company in Lithuania and an EU-licensed e-money institution. We provide fast, convenient, and affordable financial services globally. Our services range from a payment gateway for e-shops, a finance management app, money transfers, and a parcel locker network.
With over 1 million app downloads and growing, we aim to become an industry-leading super app that provides financial and lifestyle services across the globe. At Paysera, we are a start-up-minded team, which means we thrive in a fast-paced environment and seek open communication while placing great focus on upholding our core company values. Join our vibrant international team of over 700+ people across 20+ cities, worldwide.
Role Overview
- Title: Linux System Administrator
- Level: Senior
- Team: IT Infrastructure
- Reports To: Head of IT Operations
Purpose: To manage, secure, and optimize Paysera's global Linux-based infrastructure, ensuring high availability, scalability, and security for all core business services across multiple data centres.
Key Responsibilities
- Manage and maintain 400 Ubuntu/Debian-based virtual machines in production using VMware ESXi, Proxmox, and KVM.
- Support and optimize MariaDB, PostgreSQL, InfluxDB, Redis, and RabbitMQ in production environments of multi-terabyte scale.
- [Monitor infrastructure health using Zabbix, Prometheus, InfluxDB, and APM tools, ensuring SLA uptime compliance and incident resolution within defined response times.
- Troubleshoot infrastructure-related incidents, escalating as needed, and perform planned maintenance with minimal downtime.
- Automate deployments and configurations using Ansible, Terraform, and Helm for consistent and repeatable environments.
- Implement and maintain operating system security hardening measures and integrate with SIEM solutions for proactive threat detection.
- Participate in installing and configuring basic infrastructure services for a new data center.
- Lead the migration of core business services between old and new data centers with zero critical service downtime.
- Document system configurations, SOPs (Standard Operating Procedures), and change logs for audit readiness.
- Collaborate with cross-functional teams to align infrastructure changes with business continuity plans.
Must-Have Requirements
- Minimum 4 years of Linux system administration in production environments with 100+ servers
- Proven experience with virtualization platforms (VMware ESXi/Proxmox/KVM) managing 100+ VMs concurrently.
- Proficiency in administering DBs MariaDB/PostgreSQL and Redis.
- Ability to write and maintain automation scripts in Bash/Python/Go, and use Terraform & Ansible for infrastructure-as-code.
- Solid knowledge of the OSI model and experience with ACLs, VPNs, and firewalls at a junior-to-mid level.
- Demonstrated experience with infrastructure monitoring tools (Zabbix, Prometheus or InfluxDB) for environments with 99.9%+ uptime targets.
- English language skills at B2 level or higher for technical documentation and cross-team communication.
- Stable career history with average tenure of 2+ years per role over the past 5 years.
Nice-to-Have Qualifications
- Experience deploying and managing Kubernetes clusters and Docker containers.
- CI/CD pipeline management experience using GitLab CI.
- Administration experience with cloud platforms (AWS, GCP).
- Experience configuring and managing CDN services such as CloudFlare or Akamai.
- Production experience with RabbitMQ and Kafka
Work Conditions & Contract Info
- Employment type: Full-time, permanent contract.
- Work arrangement: From Ahmedabad - Hybrid
- Core Work hours: Business hours aligned with CET/EET.
- Start date: As soon as possible.
