Senior Platform JS Full-Stack Developer

Readymag

Senior Platform JS full-stack developer at Readymag, designing core infrastructure systems and supporting authentication and billing integrations in a remote setup.

Posted 5/9/2026contractRemote • 🇺🇸 United StatesSeniorWebsite

Tech Stack

Tools & technologies

CloudDNSJavaScriptMongoDBNode.jsTypeScript

About the role

Key responsibilities & impact

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

What you’ll need

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

Comp & perks

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.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Node.jsBunTypeScriptOAuthSSO2FAMongoDBSolid.jsimage processingvideo processing

Soft Skills

product development experienceownershipcommunication