Senior Platform Reliability Engineer

OneRail; Kraków; Hybrid; PLN 312,480 - 357,120; Full time

Job summary

OneRail in Kraków, Poland seeks a Senior Site Reliability Engineer to ensure availability, performance, scalability, and observability of our SaaS platform. You’ll design and optimize platform architecture, improve reliability, and lead automation initiatives.

Collaborating with Engineering, Product, and Operations, you will implement monitoring, incident response, and reliability best practices, and help scale services while reducing manual toil.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or a related technical field.
• 5+ years of experience in Site Reliability Engineering, Platform Engineering or a related role.
• Strong experience with cloud-native architectures and distributed systems.
• Hands-on experience implementing observability solutions, including metrics, logging, tracing, and APM.
• Experience designing scalable backend architecture using Node.js, TypeScript, .NET
• Strong knowledge of database administration, performance tuning, and optimization, including Azure Cosmos DB, MySQL, or similar platforms.
• Experience building automation frameworks, scripting solutions, and operational tooling.
• Familiarity with CI/CD pipelines and continuous integration practices using GitHub Actions or similar platforms.
• Experience with containerization technologies such as Docker.
• Strong understanding of event-driven architectures, messaging systems, and real-time data processing platforms.
• Experience with monitoring and observability tools such as Datadog, OpenTelemetry, ELK Stack, App Insights, Grafana, or Prometheus.
• Excellent troubleshooting, analytical, and problem-solving skills.
• Strong written and verbal communication skills with the ability to collaborate across technical and business teams.
• Advanced proficiency in English & Polish, both written and spoken (B2+).

Responsibilities

• Serve as platform SME, mentoring teams on reliability, scalability, security, and operations.
• Design, implement, and maintain observability across all platform services.
• Benchmark, analyze, and optimize application performance, cloud services, databases, and distributed systems.
• Build and maintain performance, load, chaos, and resilience testing frameworks.
• Perform advanced analysis and tuning of databases to improve performance and scalability.
• Develop automation frameworks and operational tooling to reduce manual effort.
• Lead incident response, perform root cause analysis, and drive improvements.
• Optimize performance of databases, caches, streaming platforms, and message brokers.
• Collaborate with Engineering, Product, and Operations to deliver highly available solutions.
• Establish monitoring, alerting, and reliability standards.
• Create technical documentation, runbooks, diagrams, and procedures.
• Evaluate emerging technologies to enhance reliability and efficiency.

Skills

SRE experience

Cloud-native architectures

Observability implementation

Backend architecture

DB administration

Automation frameworks

CI/CD pipelines

Event-driven architectures

Observability tools

Troubleshooting

English & Polish comms

Education

Bachelor’s degree in Computer Science, Engineering, or related field

Tools

Docker

GitHub Actions

OpenTelemetry

Datadog

Grafana

Prometheus

ELK Stack

Azure Cosmos DB

MySQL

Job description

OneRail in Kraków, Poland seeks a Senior Site Reliability Engineer to ensure availability, performance, scalability, and observability of our SaaS platform. You’ll design and optimize platform architecture, improve reliability, and lead automation initiatives.

Collaborating with Engineering, Product, and Operations, you will implement monitoring, incident response, and reliability best practices, and help scale services while reducing manual toil.