General Index (GX) is a commodity benchmark provider based on the most data. We produce over 4,200 daily energy prices - in crude oil & refined products, biofuels, hydrogen, and carbon markets - which our clients use to make critical energy & investment decisions. GX’s unique approach collates thousands of trades from 225+ data partners and applies expert-designed algorithms based on detailed methodologies to calculate prices. GX benchmarks are robust, consistent and compliant with IOSCO and FCA requirements.
Backed at Series A by Chalfen Ventures and 20VC (Harry Stebbings), GX has an experienced team with proven leadership – as well as a rapidly growing customer and partner base.
With offices in London, Krakow, Houston, and Singapore, GX continues to expand rapidly and is now hiring Junior / Intern developer to support our next phase of growth.
About the role:
We are looking for an enthusiastic and motivated Junior React Developer or Intern to join our growing development team. This is a fantastic opportunity for someone early in their career to gain hands-on experience building real-world applications that power critical energy and commodities data for our global clients. You'll work directly with our senior engineers and Head of Technology and be part of our rapid growth story as a Series A fintech company.
You will:
- Assist in developing and maintaining front-end features in React
- Collaborate with designers and back-end developers to create seamless user experiences
- Write clean, reusable, and well-documented code
- Participate in code reviews and team meetings
- Troubleshoot and debug application issues
- Learn and grow your front-end skills in a real-world development environment
You offer:
- Familiarity with React.js and JavaScript (ES6+)
- Understanding of HTML5, CSS3, and responsive design
- Basic knowledge of REST APIs and modern front-end workflows (e.g., Webpack, Babel)
- Familiar with version control (Git/GitHub)
- Enthusiastic about learning and contributing to a team
We offer:
- Office in Zabłocie, Krakow
- Competitive base salary
- Share options for full-time employees
- Mentorship from experienced developers
- Luxmed
- Multisport
- Regular off sites and team socials, with a positive and high-energy culture.
