Senior DevOps engineer

Senior DevOps Engineer – Digital Winners

Role Overview

We are looking for a Senior DevOps Engineer to own, automate, and continuously improve our cloud and on-premises infrastructure. You will work closely with our development teams to ensure stable, secure, and scalable environments, enabling fast and reliable delivery of new product features.

The ideal candidate has hands-on experience with AWS, CI/CD pipelines, observability stacks, and networking, and feels comfortable operating in high-traffic, business-critical environments.

Key Responsibilities

Cloud Infrastructure (AWS)

● Design, manage, and optimize infrastructure on AWS, including:

AuroraDB and other database engines

EC2 instances and load balancers

Amazon Linux 2023

S3 buckets

Route53 DNS

ECR for container images

● Implement and maintain secure, well-structured VPCs, routing, and VPNs.

• Contribute to capacity planning, performance tuning, and cost optimization.
  
  

CI/CD & Automation

● Build and maintain CI/CD pipelines using Azure DevOps.

● Manage and secure secrets in Azure DevOps.

● Use Terraform for Infrastructure as Code (IaC) to provision and manage resources.

• Integrate and maintain SonarQube for code quality and security checks.
  
  

Observability & Monitoring

● Implement and operate a full observability stack using:

Prometheus

Grafana

Loki

● Set up and fine-tune dashboards, alerts, and metrics to ensure proactive monitoring.

● Investigate and resolve incidents, performing root cause analysis and proposing

improvements.

CDN & Performance

● Work with Cloudflare for:

Real-time image optimization

Geo-specific content caching

● Workers (edge functions) to run logic at the edge

• ●Optimize performance and latency for high-traffic websites and streaming services.
  
  

On-Premise Systems

● Support and maintain on-prem infrastructure, including:

VmWare ESXi

MariaDB & PostgreSQL

Nginx

Ansible

Networking (e.g. Mikrotik)

Video recording and related systems

Collaboration & Documentation

● Collaborate closely with development teams to help them adopt DevOps tools and best

practices.

● Mentor developers on how to use CI/CD, observability, and automation to increase

productivity.

● Write and maintain documentation for infrastructure, deployments, and release

processes.

● Propose and implement improvements to stability, security, and performance based on

data and experience.

Required Qualifications

● 3+ years of experience in a DevOps, SRE, or similar infrastructure role.

● Strong experience with AWS (EC2, load balancing, DNS, storage, managed databases).

● Solid experience with Linux administration (preferably Amazon Linux).

● Hands-on experience with:

CI/CD pipelines (ideally Azure DevOps)

Infrastructure as Code (Terraform)

Monitoring and logging tools (Prometheus, Grafana, Loki)

● Familiarity with containerization and image registries (Docker, ECR).

● Good understanding of networking concepts (routing, VPNs, firewalls, VPCs).

● Experience administering Nginx, MariaDB, and/or PostgreSQL in production.

• ●Experience with Cloudflare (including Workers and advanced caching setups).
  
  

Preferred Qualifications

● Experience with Ansible or similar configuration management tools.

● Previous work in high-traffic or performance-critical environments.

• ●Strong awareness of security best practices for both cloud and on-premise systems
  
  

Soft Skills

● Proactive, ownership-driven mindset with focus on reliability and improvement.

● Ability to explain complex technical concepts to non-DevOps stakeholders.

● Experience mentoring or supporting development teams.

● Strong documentation and communication skills.

• ●Desire to stay up-to-date with DevOps, cloud, and infrastructure trends and tools.
  
  

What We Offer

• Yearly performance bonus
• Competitive salary based on experience
• The opportunity to work on high-traffic iGaming and sports platforms.
• Modern tech stack and tools across cloud, observability, and CI/CD.
• A collaborative, product-driven environment with experienced tech teams.
  
  

The position is full-time and requires on-site presence in Kallithea, Athens, Greece.