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Sigma Software Group

Principal Site Reliability Engineer

Warsaw, Masovian Voivodeship, PolandPosted 1 months ago
Full-timehybridMid-Senior Level

Job Description

  • Define and lead infrastructure and reliability strategy across the platform
  • Design scalable, resilient systems in collaboration with engineering teams
  • Optimize build, testing, and deployment processes for speed and stability
  • Establish and uphold best practices for CI/CD, monitoring, and observability
  • Lead incident response and drive continuous improvement post‑incident
  • Automate workflows to reduce operational toil and risk
  • Mentor engineers and foster a culture of operational excellence
  • Make strategic build‑vs‑buy decisions balancing speed, quality, and sustainability
  • At least 8 years of experience in Site Reliability Engineering or DevOps roles, including 2+ years in a Principal or Lead position
  • Proven experience in infrastructure modernization and scaling initiatives for high‑growth environments
  • Strong proficiency in Python
  • Deep expertise in cloud platforms and container orchestration tools such as AWS ECS and EKS
  • Solid experience in CI/CD pipeline design and optimization using tools like GitHub Actions and Buildkite
  • Proficiency in infrastructure‑as‑code tools such as Terraform
  • Strong knowledge of monitoring, observability, and performance optimization practices
  • Upper-Intermediate level of spoken and written English

WOULD BE A PLUS

  • Experience with monorepos (Turborepo, pnpm)
  • Familiarity with modern TypeScript tools (swc, biome, oxc)
  • Knowledge of NestJS, NextJS, and testing frameworks (Jest, Vitest)

PERSONAL PROFILE

  • Excellent leadership, communication, and decision‑making abilities
  • Ability to work independently and make pragmatic build‑vs‑buy decisions in fast‑paced environments

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Principal Site Reliability Engineer at Sigma Software Group | Renata