Senior Linux System Administrator

Overview

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.
  
  

• 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.
  
  

• 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
  
  

• 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.