Ruby on Rails Developer

About us

LLInformatics is a forward-thinking IT consulting firm, trusted by clients across Europe and North America. We specialize in delivering complex projects on time, with exceptional quality, and always meeting the highest compliance standards. Our remote-first team of 130+ experts is passionate about building cutting-edge digital products that drive real results. With a focus on data-driven decisions, measurable outcomes, and a strategic mindset, we’re raising the bar in our industry—backed by a strong, collaborative work culture that fuels our success.

• Contract Type: B2B

• Location: Remote or in our Warsaw office
  

Your Tasks and Responsibilities:

• Design, develop, and maintain backend features and APIs using Ruby on Rails.

• Build scalable backend services supporting business applications.

• Collaborate with Product, QA, and DevOps teams to deliver business-focused solutions.

• Improve application performance, reliability, maintainability, and scalability.

• Write clean, production-ready code with appropriate test coverage (unit and integration tests).

• Participate in code reviews and follow engineering best practices.

• Troubleshoot application issues and support production deployments.

• Participate in agile development processes and contribute to continuous improvement initiatives.

Requirements:

• 4+ years of commercial Ruby on Rails experience.

• Strong experience building and maintaining production-grade APIs and backend systems.

• Good knowledge of PostgreSQL and relational database design.

• Experience with RSpec and automated testing.

• Experience with AWS and/or Heroku.

• Understanding of software architecture principles and backend scalability concepts.

• Experience working in Agile environments.

• Strong communication skills in English (B2+) and Polish (B2+).
  

Nice to Have:

• Experience with background processing solutions (e.g., Sidekiq).

• Experience with monitoring, observability, and performance optimization.

• Experience working with international teams and stakeholders.
  

Why join us? 

• Flexible Working Hours – We focus on results! Manage your time, keep your team informed about your availability, and attend key meetings.

• Work from Anywhere – Choose your ideal setup! Work 100% remotely within the EU, go hybrid, or enjoy our Warsaw office, fully equipped for productivity.

• Comprehensive Onboarding – From day one, we ensure you feel comfortable and supported, so you can quickly become part of the team.

• Flat Structure – We value initiative and open communication. Every voice matters here!

• Positive Company Culture & Team Spirit – We create an environment where everyone feels appreciated and comfortable.

• Modern Work Methods – We use cutting-edge project management techniques inspired by the IT world.

• Transparent Communication – Regular 360° feedback sessions and mentor support to help you grow.

• Top-Notch Equipment – Get a MacBook for your work. If you choose to work from our Warsaw office, you'll also have access to a 34” (16:9) widescreen monitor and an ergonomic standing desk.

• Weekly English Lessons – Optional classes with a native speaker to help you improve your skills.