Senior Fullstack Developer - Freelancer (Ruby on Rails and TypeScript)

Monterail

Wrocław, Lower Silesian Voivodeship, Poland Remote permanent

Posted: April 24, 2026

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Quick Summary

A Senior Fullstack Craftsman with expertise in Ruby on Rails and TypeScript, responsible for building complex dashboards, billing UIs, and documentation platforms, with a focus on developing a deep understanding of the user experience (UX) through hands-on experience with our product.

Required Skills

Ruby on Rails TypeScript Full-Stack Development DevEx Ambiguity Accountable Reliability Ownership Production Monitoring Quality Assurance

Job Description

We’re looking for a Senior Fullstack Developer - Freelancer

What We’re Looking For

• A Full-Stack Craftsman: You are an expert in Ruby on Rails and TypeScript, capable of building everything from complex dashboards and billing UIs to sleek documentation platforms.
• The "DevEx" Champion: You have a natural empathy for other developers. You’ll develop deep knowledge of our platform (Pub/Sub, Chat, LiveSync) and use the product yourself to gain a first-hand understanding of the developer experience.
• Comfortable with Ambiguity: You thrive in high-level vagueness. You can take a feature from a loose concept to a shipped product with minimal hand-holding, identifying problems and proposing solutions independently rather than waiting for a roadmap.
• Accountable & Reliable: You take pride in high-quality, well-tested code. You meet your delivery commitments, provide realistic estimates based on technical complexity, and communicate proactively if a timeline is ever at risk.
• An Owner: You monitor what you build in production and take personal ownership of quality issues. You see a feature through its entire lifecycle, from the first line of code to the final metric.

What do we mean by freelance?

• Read more at Monterail Tech Network

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