Principal Software Engineer

Are you ready to shape and optimise complex, large-scale systems for millions of users? We're a pioneering tech company disrupting a major industry, delivering transparent, user-focused solutions that handle billions in transactions yearly. We’re looking for an exceptional Principal Engineer to lead innovation across our platform and drive global scaling. What We Offer:

• Competitive salary up to £160,000 + stock options
• Personal and company performance bonuses
• Hybrid working model (London office)
• Health insurance & flexible hours
• Onsite chef serving daily lunch/dinner
• Option to work remotely from anywhere for 1 month a year
• Collaborative culture focused on growth and flexibility

The Role: As a Principal Engineer, you’ll be the team’s senior technical leader, working closely with the CTO. Your role will be pivotal in designing a scalable, high-performance platform that supports real-time, high-volume transactions. Our stack includes Python, Rust, C++, TypeScript, React, Node.js, Kafka, PostgreSQL, Redis, Terraform, AWS, Kubernetes, and Docker . You’ll be instrumental in creating optimised distributed systems, leading technical innovation, and shaping the future of our platform. Key Responsibilities:

• Architect scalable microservices using Python, Rust, and TypeScript
• Optimise performance, reduce latency using PostgreSQL, Redis, and Kafka
• Lead the adoption of CI/CD practices with robust monitoring and alerting
• Mentor engineering teams, driving best practices and continuous improvement
• Solve complex technical problems in event-driven and real-time distributed systems

What We’re Looking For:

• Proven expertise in building scalable systems and influencing architecture
• Strong experience with cloud infrastructure (AWS preferred), containerisation (Docker, Kubernetes), and infrastructure-as-code (Terraform)
• Deep knowledge of Python, C++, or Rust, with familiarity in Kubernetes, Docker, PostgreSQL, and Redis
• Bonus: Experience with TypeScript, React, and Node.js
• Proficiency with CI/CD pipelines, monitoring (Grafana, Prometheus), and messaging systems (Kafka)
• Strong leadership and collaboration skills

Why Join Us? We’re an award-winning tech company, recognised for our groundbreaking solutions and featured by major media outlets. Our mission is to deliver best-in-class real-time platforms that are transparent, reliable, and scalable. With offices in London and the US, we offer career progression, personal development, and the chance to work on cutting-edge technology in a hybrid work environment. Ready to take the next step? Apply today to learn more!