Backend Engineer — Privacy-First VPN, Flexible

Proton; Barcelona; Presencial; EUR 53.000 - 104.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Stock options

Technology equip & software

Learning & Development

Employee benefits

In-person collaboration

Food & snacks

Transport support

Flexible working

Descripción de la vacante

Proton is expanding its VPN team to build the world’s most trustworthy VPN. You will work with back-end engineers to create massively scalable services for millions of users, focusing on reliability, security, and high-quality API design.

The role emphasizes collaboration with client app teams and product management to meet critical business needs. Ideal candidates have PHP back-end experience, a strong grasp of SQL/MySQL, Redis, and modern API technologies, plus a proven track record in leading

Formación

• 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.

Responsabilidades

• Work closely with a group of Back-End Engineers and Architects to build resilient, massively-scalable solutions for millions of people to rely on
• Collaborate with teams of client application developers and product management to ensure that the back-end meets critical business and reliability requirements
• Document back-end capabilities and their proper use so that all Proton VPN clients can implement correctly-functioning solutions
• Debug and repair vital systems such as the systems responsible for cleaning up file revisions and returning quota to users

Conocimientos

PHP back-end

Scalable systems

Profiling tools

Team leadership

HTTP/REST

Security basics

Cryptography basics

Herramientas

MySQL

Redis

Docker

OpenAPI

Grafana

OpenTelemetry

Python

Rust

Descripción del empleo

Proton is expanding its VPN team to build the world’s most trustworthy VPN. You will work with back-end engineers to create massively scalable services for millions of users, focusing on reliability, security, and high-quality API design.

The role emphasizes collaboration with client app teams and product management to meet critical business needs. Ideal candidates have PHP back-end experience, a strong grasp of SQL/MySQL, Redis, and modern API technologies, plus a proven track record in leading