Principal Software Engineer

Principal Software Engineer (Python / Rust / Go / C++)

📍 London - Hybrid (3 days onsite)

We’re building a real-time, event-driven platform where latency, correctness, and resilience are first-class concerns, processing billions of events across a globally distributed system.

This is a hands‑on Principal Engineer role focused on complex distributed systems at scale, with an emphasis on performance and reliability.

• Design and evolve low-latency, distributed systems operating at significant scale
• Lead deep technical dives into latency, throughput, tail performance, and observability
• Stay hands‑on in the code while shaping architecture and long‑term system direction
• Partner closely with senior engineering leadership to influence critical technical decisions
• Take end-to-end ownership of complex, performance‑critical problem spaces
• Set engineering standards and best practices through code, reviews, and architectural leadership
• You’ll be part of an engineering‑led culture with standout benefits:
• Full private health insurance
• Enhanced maternity and paternity leave
• In‑office chefs provide fresh daily meals
• Work remotely from anywhere for one month each year

• Strong systems‑level coding skills in Python, Rust, Go, or C++
• Experience building high-performance, distributed, or real-time systems
• Production experience with Kafka, Kubernetes, cloud infrastructure (AWS preferred), and CI/CD
• Comfortable reasoning about latency, throughput, failure modes, and system trade-offs
• An engineer who takes deep technical ownership of complex, performance‑critical systems

Up to £160,000 base, 25% performance bonus, and equity, plus full benefits and hybrid flexibility.

If you’re motivated by solving complex engineering problems and want to help shape the backbone of a global real-time platform, we’d love to hear from you.