Senior Fullstack Engineer (Commerce Platform)
Company: Deepstreamtech
Location: London
Posted: May 19th, 2026
Requirements
- You are experienced with modern JavaScript development, testing, and debugging
- You have experience building and scaling backend services using Java and/or Python
- You have worked in cloud-native environments such as Google Cloud Platform or similar platforms
- You have experience designing and maintaining libraries, frameworks, or developer tools used by other engineers
- You have hands-on experience working with scalable databases such as PostgreSQL
- You approach engineering problems with strong analytical thinking and practical solutions
- You communicate clearly and collaborate well with cross-functional teams
- Experience working in e-commerce, financial systems, or high-volume transaction environments is a plus
What the job involves
- As a Senior Fullstack Engineer, you’ll work on systems that process large volumes of transactions and support the global purchase experience
- Your work will help evolve the platform that powers Spotify’s commerce ecosystem, ensuring our payment infrastructure remains scalable, reliable, and innovative as we grow
- Architect and implement scalable backend services and frontend components that power Spotify’s commerce platform
- Design and develop critical capabilities in Java and Python services operating in a high-volume, low-latency environment
- Build and maintain the pay-in functionality that enables payment processing across Spotify products
- Run and analyze experiments to improve payment performance and user experience
- Improve system reliability through monitoring, alerting, and operational best practices
- Collaborate with engineers, product managers, and cross-functional teams to deliver impactful commerce features
- Contribute to evolving Spotify’s payment infrastructure and SDK capabilities for developers across the company
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