Senior Platform JS Full-Stack Developer

Job Description:

• Design and maintain core infrastructure systems: domains, TLS, caching, proxying, load and geo balancing;
• Own and evolve the authentication system, including 2FA, SSO, and related security flows;
• Maintain and improve billing integrations;
• Develop and support the mailer system and internal tooling (including browser extensions);
• Take ownership of our bundling pipeline, including custom plugins and build tooling;
• Work on SSR and isomorphic rendering with Solid.js;
• Support observability infrastructure (using OpenTelemetry stack);
• Implement and improve image/video processing pipelines and project export features;

Requirements:

• 5+ years of product development experience
• Hands-on experience with Node.js/Bun and TypeScript for building, deploying, and maintaining API services
• Experience with authentication protocols and security fundamentals (OAuth, SSO, 2FA, common vulnerabilities)
• Familiarity with observability tooling and practices (logging, tracing, metrics)
• Experience with MongoDB or other databases
• Comfort working across the stack, from browser APIs to infrastructure configuration
• English at a B2+ level.
• Experience with billing systems such as Stripe (would be a plus)
• Proficiency in the modern Solid.js ecosystem (would be a plus)
• Knowledge of bundlers and build tooling at a low level (Bun, esbuild, vite, custom plugins) (would be a plus)
• Experience with network and content delivery technologies (HTTP/S, DNS, TLS, CDN, proxying and caching) (would be a plus)
• Experience with SSR frameworks or isomorphic rendering patterns (would be a plus)
• Familiarity with containerization, cloud environments, and CI/CD (would be a plus)
• Experience with media processing pipelines (image/video transformation) (would be a plus)
• Understanding of browser extension architecture (would be a plus).

Benefits:

• Remote work with a flexible schedule
• 28 weekdays of paid annual leave
• Access to a corporate laptop
• Compensation for coworking space fees
• Language courses
• Compensation for sports or other physical activities
• A learning budget to invest in courses, books, or conferences.