Fullstack Developer

Jumpseller is a SaaS solution for small business to manage their online business. We focus on making e-commerce easier for everyone, so businesses can focus on what they do best: building and selling their products. Today, merchants use the Jumpseller platform to manage every aspect of their online business — from products to orders to customers, selling with an online store, on mobile, on social networks and through different e-commerce channels.

At Jumpseller you will find a startup environment in which your contributions matter and you are enabled to grow professionally. We have 2 offices, one in Porto, Portugal, and another in Santiago, Chile, and our working culture is international. We all work fully remote.

The role

We are looking for an analytical, product-driven Full-Stack Engineer to join our team. We look for skilled & dedicated people who share our passion for building a product that millions of people use.

You will

• Work in an informal environment, for a global market;

• Strive to write clean, modular, flawless and scalable code responsible to handle millions of records;

• Design new features from ground-up, from a given set of specs;

• Build automated tests for your code while help improving and maintaining our current test set;

• Be in contact with our Customer Support Team, resolving technical issues and understand how to improve our service;

• Take responsibility, autonomy and ownership of your work.

The Recruitment Process

• We will review all the CVs & Cover Letters received;

• First interviews - lasting 30 minutes. This is an introductory meeting with our People Department, so that you get to know Jumpseller and present yourself;

• Top candidates will be invited to participate in a Case Study. Not more than 4 to 6 invitations will be sent;

• Finally, a last interview - lasting 45 to 60 minutes - to review the resolution Case Study & focus deeper on your main professional project/achievement;

• Offer letter.

Requirements:

• Master’s in Computer Science, Computer Engineering, or a related quantitative field;

• Strong proficiency in backend development using Ruby, coupled with frontend experience in React;

• Hands-on experience or academic focus in AI/Machine Learning, with an interest in building scalable e-commerce solutions;

• Analytical / Maths / Strong Tech Profile. Analytical / engineer minded profile;

• Native proficiency in Portuguese and professional working fluency in English (both written and verbal);

• Based in Porto, Portugal. We have a strong preference for candidates in the northern region (hybrid/remote flexibility);

• Team Player;

• AI-native mindset: Uses AI as a core part of the development process, not just as a coding assistant, leveraging multiple parallel agents to build features faster, solve complex problems, and dramatically multiply individual engineering productivity;

• Being communicative, having initiative and being transparent;

• Generally interested in developing e-commerce platforms.