Senior JS Full-stack Developer

Senior JS full-stack developer

We're looking for a senior full-stack JavaScript developer to join our Platform team. You'll take ownership of infrastructure projects that make the rest of the product possible: from how we bundle and deliver code to how services authenticate users and communicate with each other.

This is a fully remote position under a service agreement. We work primarily within the GMT+1 time zone and expect a regular overlap of business hours on weekdays to allow for meetings and live collaboration.

What you’ll do

Who we are

Readymag is a design tool for creating websites, landing pages, portfolios, magazines, editorials, and presentations.

We’re a fully distributed team with a strong international user community and client-oriented service. We value a culture of questions and curiosity with a ‘measure what can be measured’ approach.

• 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;
• Collaborate with the Core and Growth teams on shared projects like templates and examples.

What you'll bring

Would be a plus

• 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;
• Proficiency in the modern Solid.js ecosystem;
• Knowledge of bundlers and build tooling at a low level (Bun, esbuild, vite, custom plugins);
• Experience with network and content delivery technologies (HTTP/S, DNS, TLS, CDN, proxying and caching)—not just conceptually, but in practice;
• Experience with SSR frameworks or isomorphic rendering patterns;
• Familiarity with containerization, cloud environments, and CI/CD;
• Experience with media processing pipelines (image/video transformation);
• Understanding of browser extension architecture.

What you’ll get

What happens next

• 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.
• A 45-minute call with our talent acquisition partner where you’ll have the opportunity to ask questions about the role. We’ll also ask you to fill out a form with a few technical questions that don't require special preparation;
• A test assignment;
• An interview with our chief technology officer and a Core team representative. This usually takes around 1.5 hours, including technical questions and a free-form feature design/review. You don’t need to write code during the interview;
• A finalizing call with Diana Kasay, Readymag chief executive officer.

A few days after the final stage, we’ll reach out to you with a decision.

How to apply

Use the application form in our HR system to send us your CV and a cover letter summarizing your relevant work experience and explaining why you’d like to join the Readymag team. If your experience matches our requirements, we’ll get back to you and schedule the next step.