Senior Platform Engineer

Welcome Pickups

. Keep the platform behind Welcome's travel product reliable, fast, scalable and secure.

Posted 10/6/2026full-timeAthens • GreeceSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in backend systems and cloud infrastructure, with a strong focus on PostgreSQL performance tuning, security practices, and compliance frameworks. Capable of leading architecture decisions and improving system reliability while managing technical roadmaps and incident processes.

Highest-signal resume keywords

PostgreSQL Performance TuningCloud Infrastructure (Azure Preferred)CI/CD ExperienceSecurity FundamentalsIncident Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software EngineeringSystem DesignDistributed SystemsPerformance Trade-offsInfrastructure-as-CodeDockerRuby on RailsKubernetesObservabilityCompliance Frameworks

Soft Skills

OrganisedClear WriterHands-on Mindset

Tools & Technologies

New RelicRollbarJiraRedisElasticsearchRabbitMQPumaPostGISAWSGoogle Cloud

Industry Keywords

PCI ComplianceGDPR ComplianceSOC 2ISO 27001TravelMobilityMarketplaceReal-time Operations

Tech Stack

Tools & technologies

AWSAzureCloudDistributed SystemsDockerElasticSearchKubernetesPostGISPostgresRabbitMQRedisRubyRuby on Rails

About the role

Key responsibilities & impact

Keep the platform behind Welcome's travel product reliable, fast, scalable and secure.
Make architecture and infrastructure decisions and set engineering standards.
Own the technical roadmap with the Product Manager of the Core team.
Define and track reliability targets for bookings, ride matching and payments.
Run the incident process and on-call, reducing recovery times.
Improve monitoring and alerting using New Relic and Rollbar.
Lead architecture decisions for scaling backend systems and services.
Identify and fix performance bottlenecks across the application, background jobs and database.
Tune PostgreSQL queries and indexes; plan data growth and archiving; manage replication, backups and restore drills; and change large tables without downtime.
Ensure the platform handles peak season and partner growth.
Define and evolve Azure infrastructure strategy while balancing performance, reliability and cost.
Define and enforce security practices for access control, secrets management, and build and release pipelines.
Prepare the platform for PCI, GDPR, SOC 2 and ISO 27001 compliance.
Improve internal tooling, CI/CD and deployment workflows.
Organise and prioritise technical work in Jira with the Product Manager.
Write technical documentation, runbooks and development plans, converting them into Jira tickets.
Participate in grooming, planning, kick-off meetings, retrospectives and demos.

Requirements

What you’ll need

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.
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.
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.

Benefits

Comp & perks

Vibrant and fresh work environment
Flexible work-from-home policy
The tools you need to perform your daily tasks successfully
L&D personal budget
Private Insurance Plan
+4 extra PTO days annually
The unique opportunity to join “the next big thing” at ground level