Monterail

Principal Software Developer (Ruby on Rails & React) - Freelancer

Monterail  •  Wrocław, PL (Remote)  •  9 days ago
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Job Description

We’re specifically looking for a Principal Software Developer (Ruby on Rails & React) - Freelancer

What We’re Looking For

  • 8+ years of experience in software development, with deep, senior-level expertise in Ruby on Rails and React
  • A proven senior profile, someone who doesn’t just execute, but defines direction, shapes systems, and confidently makes architectural and product decisions
  • Strong sense of end-to-end ownership: you are comfortable setting the roadmap, identifying gaps, and continuously building on top of existing systems without needing close guidance
  • A senior-level commitment to quality, with extensive experience designing and maintaining robust test suites; testing is a core part of how you build, not an afterthought
  • Clear and demonstrated focus on admin panels and internal tooling, with the maturity to design for usability, maintainability, and long-term evolution (not user-facing products)
  • Experience working closely with internal stakeholders, with the communication skills and seniority to translate needs into well-structured solutions across varying levels of complexity
  • Background in smaller-scale environments (e.g., internal tools, limited user bases), where pragmatic decision-making and thoughtful trade-offs are more important than hyper-scale concerns
  • A self-directed, senior mindset, you bring structure to ambiguity, operate independently, and take responsibility for both the technical direction and its outcomes

What do we mean by freelance?

Read more at Monterail Tech Network

Monterail

About Monterail

Monterail is a leading software development company specializing in creating innovative software for industry leaders. Based in Wrocław, Poland, our team of 130+ experts delivers solutions for fintech, proptech, wellness, and e-commerce sectors.

For over 15 years, we've been using Ruby on Rails and Flutter to build beautiful web and mobile applications. We've delivered 900+ successful projects for clients from different parts of the world.

In 2016 and 2017, we were recognized by Deloitte as one of the fastest-growing tech companies in Central Europe and were listed twice in the Financial Times 1000 ranking.

Monterail is your technology partner that stands out through long-term relationships, transparency, and high delivery quality. We serve global clients with a focus on the US market, providing senior-level expertise and time-zone-friendly collaboration.

Industry
IT & Software
Company Size
51-200 employees
Headquarters
Wrocław, PL
Year Founded
2010
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