Back End Developer

About This Role

This role involves solving complex backend challenges related to streaming responses, intelligent batching, low-latency caching, and API optimization under heavy load. This high-impact position focuses on system reliability, cost efficiency, and ultra-low latency to directly enhance the product experience. As a Backend Engineer specializing in AI infrastructure, you will own the inference and orchestration layer that powers intelligent features across all client platforms.

Responsibilities

• Build and operate scalable backend systems that serve AI-powered features in production
• Design high-performance inference pipelines, orchestration workflows, and clear service boundaries around ML models
• Own system health and observability, including performance monitoring, structured logging, alerting, and incident response
• Optimize system latency and throughput through intelligent caching strategies, request batching, and response streaming
• Collaborate with client and machine learning engineers to deliver stable, high-efficiency APIs for mobile and desktop applications

Requirements

• Proven background in core backend software engineering within production environments (Python, Node.js)
• Infrastructure experience with Docker, Kubernetes
• Practical experience building and maintaining high-throughput, low-latency distributed microservices
• Solid understanding of modern AI inference patterns, including LLMs, vector embeddings, and multimodal architectures
• Hands-on experience debugging and profiling complex distributed systems operating under heavy load
• Familiarity with commercial AI APIs (e.g., OpenAI, Anthropic) as well as self-hosted open-source models
• Production-focused mindset with a strong bias toward shipping, observing live system behavior, and iterating quickly

Benefits

• Small founding team, building a greenfield AI email product from scratch
• High-caliber engineers from top tech companies; very high technical bar
• Fully remote, global team, strong ownership, and visible impact
• Very strong reward culture (including significant equity and high comp flexibility)

Important Details

• This role must be based in Europe

About the Company

Our client's mission is to fundamentally change the productivity landscape around email, calendars and note-taking by developing proactive, AI-native applications designed for the general public. They are bringing seamless intelligence to workflows, scheduling, and daily errands, all without requiring users to master complex prompting.