Senior Fullstack Developer with Ruby on Rails and Javascript - Freelance

Netguru is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, Netguru is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.

As a Netguru freelancer, you can choose what works well for you. You decide when, where, and how you work on projects and tasks. 

We match you with work that fits your skills. Plus, you have access to various opportunities across different industries and companies. That means you will not only gain more experience, but also develop various skills.

But there's more. Netguru freelancers can benefit from full-time collaboration and really be a part of the team.

So, are you ready to make an impact? Join Netguru, and let's build beautiful software together.

Currently, we are looking for a (Senior) Fullstack Developer with RoR and Javascript who possess excellent technical, and soft skills to join one of the Client's ongoing projects.

Start date: 14.01.2026

Length of the project: 6 months

Full-time

Salary rate: up to 41 EUR/h (B2B contract)

Language requirement: English (C1)

Working hours: CET

Description: Our Client's Shopify app requires incremental UI improvements and backend API optimisations within a mature, complex codebase, making quick ramp-up and safe delivery challenging. The fast-paced environment and multi-system integrations also demand high technical judgment to avoid regressions while delivering new features for high-profile customers.

Apply if you:

• have experience as a Full-stack Developer.
• have experience in Ruby on Rails.
• have experience in Javascript.
• are familiar with Ember.js.
• are familiar with Shopify APIs.
• have high seniority both in autonomous and team work.
• have knowledge of English (C1), spoken and written.
• Can work cross-functionally with distributed teams in the CET timezone.

What are the responsibilities of a Senior Fullstack Developer?

You will work as part of a small team of engineers, developing a set of new features for our Client's Shopify app requested by some of their most high profile customers. This will require incrementally improving the frontend UI, optimising backend Shopify API usage, and integrating with existing features.

• 100% remote, flexible work.
• work with an experienced team of developers and continuous development of your hard and soft skills.
• dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes.
• long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more).
  

What will happen next?

• We would like to know you better, so we will invite you for a meeting with our recruiter.
• If everything goes well, you will meet the client at the online interviews.

Looking for a full-time job? Check out our Career Page and find out more about our open recruitment processes.

If you need any disability-related adaptation at any step of the recruitment process – simply let the recruiter know! We'd be happy to help.