Senior Fullstack Engineer (VPN)

Only for registered members
Barcelona
Hybrid
EUR 50,000 - 70,000
Full time
30+ days ago

Job summary

A leading technology company in Barcelona seeks an experienced Back-End Engineer to join the VPN team, dedicated to providing privacy online. Collaborate closely with engineers to build scalable solutions, ensuring functionality and reliability for millions of users. Ideal candidates will have a solid understanding of back-end technology stacks, and experience in team leadership and security best practices. This role offers flexible working conditions and competitive benefits.

Benefits

Lunch and snacks provided
Support with transport costs
Stock options
Flexible working hours
Learning and development opportunities
Comprehensive health insurance
Generous vacation policies

Qualifications

  • Experience with PHP-based entry-points to a back-end software stack.
  • Experience building scalable solutions.
  • Experience with profiling methods and tools.
  • Experience leading a team initiative from discovery to production.
  • Solid understanding of SQL (MySql preferred) and data modelling.
  • Solid understanding of Redis or other caching technologies.
  • Solid understanding of security best practices.
  • Solid understanding of HTTP/REST, including both developing and consuming Web-based APIs.
  • High-level understanding of cryptography concepts such as key exchange and the difference between symmetric and asymmetric encryption.
  • Operational experience such as SRE or on‑call, demonstrating ability to diagnose and troubleshoot complex problems for critical systems.
  • Experience with Docker or similar containerization technologies.
  • Experience with metrics graphing/analysis toolkits such as Grafana and OpenTelemetry.
  • Experience with Python and/or Rust.
  • Experience with OpenAPI specs or other API documentation frameworks.

Responsibilities

  • Work closely with Back-End Engineers to build scalable solutions.
  • Collaborate with teams of client application developers to meet business requirements.
  • Document back-end capabilities for Proton VPN clients.
  • Debug and repair vital systems.

Skills

PHP-based entry points
Scalability in solutions
Profiling methods and tools
Team initiative leadership
SQL (MySQL preferred)
Redis or caching technologies
Security best practices
HTTP/REST APIs
Cryptography concepts
Operational experience (SRE)
Docker or containerization technologies
Metrics graphing tools (Grafana, OpenTelemetry)
Python and/or Rust
OpenAPI specs
Job description
Job description

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Your role

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Your profile

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Benefits
  • ae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.
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  • Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit,
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