Senior Linux System Administrator

Paysera; Ahmedabad District; Hybrid; INR 1,000,000 - 1,500,000; Full time

Benefits offered by this job

Flexible working hours

Health and life insurance

Skill-building workshops

Team-building events

Job summary

A leading financial technology company is looking for a Senior Linux System Administrator to manage its global Linux-based infrastructure, ensuring security and high availability across multiple data centers. The ideal candidate will have at least 4 years of experience in Linux administration, proficient in managing virtual machines and databases. This full-time role is hybrid and located in Ahmedabad, India, offering a vibrant workplace culture and comprehensive benefits.

Qualifications

• Minimum 4 years of Linux system administration in production environments with 100+ servers.
• Experience managing 100+ VMs using virtualization platforms.
• Proficiency in administering databases such as MariaDB and PostgreSQL.

Responsibilities

• Manage and maintain ~400 Ubuntu/Debian virtual machines.
• Support and optimize MariaDB, PostgreSQL, Redis in production.
• Monitor infrastructure health using Zabbix, Prometheus.

Skills

Linux system administration

Virtualization platforms (VMware ESXi, Proxmox, KVM)

Database administration (MariaDB, PostgreSQL, Redis)

Scripting (Bash, Python, Go)

Infrastructure monitoring tools (Zabbix, Prometheus, InfluxDB)

Knowledge of OSI model, ACLs, VPNs, firewalls

English (B2 level)

Tools

Terraform

Ansible

Job description

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 centre.
• Lead the migration of core business services between old and new data centres 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.

What we offer:

Work‑life Balance: strive for balance with flexible working hours and hybrid work possibilities.

Innovation Empowerment: get support and freedom to experiment with various AI tools.

Health & safety: Comprehensive Insurances from day 1 - Mediclaim, Accident, and life insurance.

Global Work Opportunities: join workations and utilise a work‑from‑anywhere approach to experience the world.

Continuous Development: participate in regular skill‑building workshops and training sessions to excel your personal and professional development.

Engaging Workplace Culture: take part in regular team‑building events and fun office initiatives.

For candidates:

Only selected candidates will be contacted, but we are grateful to all who send their CV.

Position Details

Seniority level: IC3 - Senior

Location: India

Depends on candidate's experience and competence