Surfshark

Senior Backend Engineer (Node.js)

Surfshark
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23 days ago
Kaunas, Lithuania or Vilnius, LithuaniaSenior

Responsibilities

  • Build cybersecurity products and scam-protection features.
  • Own Email, SMS, and Call scam backends, including APIs, pipelines, quality, cost, and latency.
  • Design automated email checking with background scanning, HTML and URL analysis, and safe credential handling.
  • Maintain and evolve Cloudflare Workers for routing, authentication, and edge infrastructure.
  • Collaborate across Browser Extensions, Mobile, Design, Infrastructure, Data Science, and QA.
  • Write maintainable, well-tested code and operate production services through logging, metrics, alerts, and debugging.

Requirements

  • Proven backend development experience with Node.js and Express or a similar framework.
  • Strong understanding of REST APIs and API design.
  • Production experience with MongoDB or a similar database.
  • Experience with Git and code review using GitHub or GitLab.
  • Experience with Docker and understanding of how services run in production.
  • Ability to use AI in the development workflow.
  • Bonus: experience with Cloudflare Workers or another edge runtime; LLMs or classifiers; email and SMS protocols; RabbitMQ; AWS or GCP; Google Web Risk; ClickHouse; or BigQuery.

Benefits

  • Professional development time, conferences, online learning platforms, and books.
  • Health insurance, online workouts, a physical coach, and regular mental health checks.
  • Choice of technical equipment and tools.
  • Yearly workation, Friday get-togethers, team-building activities, and company celebrations.
  • Primarily office-based work with the possibility of up to two remote days per week, plus a work-from-anywhere policy allowing work from almost anywhere in the world.
  • Additional vacation days based on tenure.
  • Premium Surfshark accounts for the employee, family, and friends.

Tech Stack

AWSClickHouseDockerExpressGitGoogle BigQueryGoogle Cloud PlatformMongoDBNode.jsRabbitMQ

Categories

Surfshark

About Surfshark

501-1,000 employees

Surfshark develops consumer cybersecurity and privacy software, including a cross-platform VPN, antivirus, data-leak alerts, private search, and data removal tools. It sells subscription plans directly to individuals, offering apps for desktop, mobile, and browsers. Founded in 2018 and headquartered in Vilnius, Lithuania, the company serves a global consumer market.

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