Fullstack Developer

Fullstack Developer

Kambi

Stockholm, Sweden

Role Overview

We’re looking for a Fullstack Developer with a strong front-end focus to help us continue to build and innovate our market-leading sports trading tool.

This role sits at the intersection of product, trading expertise, and platform engineering. You’ll work closely with our Product Owner, sports trading experts, and platform team to design and deliver intuitive, high-performance user interfaces for complex, real-time trading workflows.

Your primary focus will be front-end development using React, supported by Node.js and Python services. You’ll also collaborate closely with teams building backend services written in Python and Rust, all deployed on AWS with a strong preference for serverless architectures.

If you enjoy turning complex, data-heavy systems into elegant user experiences — and thrive in a collaborative, fast-moving startup environment — this role is for you.

What you’ll do

• Design, develop, and maintain modern front-end applications using React and MUI X, with a strong focus on usability, performance, and reliability;
• Build and maintain front-end–facing services using Node.js and Python;
• Collaborate closely with Product Owners and sports trading experts to translate complex domain requirements into intuitive user experiences;
• Work alongside backend engineers developing services in Python and Rust to integrate real-time data and trading logic;
• Contribute to cloud-native solutions on AWS, with a preference for serverless designs;
• Participate in architectural discussions across the full stack and help shape front-end standards and best practices;
• Improve developer experience through testing, CI/CD, and shared tooling;
• Continuously evolve the sports trading platform as product and business needs grow.

What we believe you have

• Strong experience building front-end applications with React (experience with MUI/MUI X or similar libraries is a big plus);
• Solid understanding of fullstack development, including APIs and service integration;
• Experience with Node.js and Python in a production environment;
• Exposure to or interest in backend systems written in Python and/or Rust;
• Experience working with AWS and cloud-native architectures (serverless experience is a plus);
• Familiarity with modern software engineering practices such as automated testing, CI/CD, and version control;
• A collaborative mindset and comfort working closely with product managers and domain experts;
• Enjoyment of a fast-paced startup environment where priorities evolve.