Platform Engineer

Platform Engineer

Model: Hybrid/Remote

Salary: 45.000 - 55.000 Euros gross

Location: Nea Ionia, Athens

What you'll work with

• A large Ruby on Rails application, with Sidekiq and RabbitMQ
• A large, fast-growing PostgreSQL/PostGIS database, plus Elasticsearch and Redis
• Azure as our main cloud, with AWS S3 and Google Cloud
• Cloud66, Cloudflare, CircleCI and Docker
• New Relic and Rollbar for monitoring, and Mixpanel for product analytics
• 30+ external services, including Checkout.com, Twilio, Braze and hotel booking systems

Responsibilities

Reliability & Uptime

• Define and track reliability targets (SLAs/SLOs) for our core flows: bookings, ride matching and payments.
• Set up and run the incident process and on-call, and reduce recovery times.
• Improve monitoring and alerting across the platform (New Relic, Rollbar).

Performance, Scalability & Data

• Lead architecture decisions for scaling our backend systems and services.
• Find and fix performance bottlenecks across the application, background jobs and database.
• Improve the performance of our large, fast-growing PostgreSQL database:
• tune slow queries and indexes
• plan data growth and archiving
• manage replication, backups and restore drills
• change large tables without downtime
• Make sure the platform handles peak season and partner growth smoothly.

Infrastructure, Security & Compliance

• Define and evolve our infrastructure strategy on Azure, and balance performance, reliability and cost.
• Define and enforce security best practices: access control, secrets management, and the security of our build and release pipeline.
• Prepare the platform for compliance: payment-data rules (PCI), GDPR, and over time SOC 2 / ISO 27001.

Developer Experience

• Improve internal tooling, CI/CD and deployment workflows so engineers can ship faster and safer.

Technical Roadmap & Collaboration

• Keep the backlog of technical work (upgrades, technical debt, performance, security) organised and ranked in Jira, and prioritise it together with the Product Manager.
• Write technical docs, runbooks and development plans, and break them into Jira tickets with clear requirements.
• Participate in team ceremonies (grooming, planning, kick-off meetings, retrospectives & demos).

Requirements

• 8+ years of software engineering experience, with strong backend and systems experience.
• BS/MS degree in Computer Science or a related subject.
• Proven experience operating and scaling production systems.

Technical Skills

• Strong understanding of system design, distributed systems and performance trade-offs.
• Strong PostgreSQL skills on large databases: query and index tuning, replication, large-table migrations, backups.
• Experience with cloud infrastructure (Azure preferred), Docker and infrastructure-as-code.
• Experience with Redis, Elasticsearch and a message broker (RabbitMQ or similar) at production scale.
• Experience with observability, monitoring and incident management.
• Strong security fundamentals: access control, networking, secrets.
• CI/CD experience, including zero-downtime deploys.
• Organised and a clear writer, comfortable working in Jira.
• A hands-on mindset: able to go from strategy to implementation.

Additional experience considered a plus

• Experience with Ruby on Rails, Sidekiq, Puma and PostGIS, or similar.
• Exposure to compliance frameworks (SOC 2, ISO 27001).
• Experience with AWS or Google Cloud alongside Azure.
• Experience moving a long-running application to containers or Kubernetes.
• A travel, mobility or marketplace background with real-time operations.