Staff AI Engineer (EMEA)

TL;DR

Staff AI Engineer (EMEA): Building and optimizing backend systems and APIs supporting AI/ML workloads with an accent on infrastructure, automation, and performance. Focus on operationalizing cutting-edge LLM technologies and collaborating with cross-functional teams.

Location: Remote (EMEA)

Company

Replika is an AI companion loved by 35M+ users around the world.

What you will do

• Build, manage, and optimize backend systems and APIs supporting AI/ML workloads.
• Support and maintain robust data and ML pipelines, ensuring scalability and reliability.
• Develop FastAPI-based microservices leveraging Python async patterns.
• Manage state and flow tracking using Redis and MongoDB, optimizing performance and persistence layers.
• Integrate with LLMs (LLaMA, OpenAI, Anthropic) and support vector database operations (e.g., Pinecone).
• Implement and maintain Docker-based containerized environments for both development and production.

Requirements

• Minimum 5+ years of experience with Python development.
• Experience with Redis (especially asyncio clients) for state tracking and flow control.
• Strong understanding of MongoDB query patterns and schema design.
• Experience working with Large Language Models, including LLaMA (3.x preferred).
• Hands-on with LLM APIs such as OpenAI, Anthropic, etc.
• Experience with vector databases like Pinecone, understanding semantic search and embeddings.

Nice to have

• FastAPI for building async APIs and microservices.
• Familiarity with Scala or willingness to learn it.
• Experience with Kubernetes or other orchestration tools.
• Prior work in AI/ML-focused product teams or research environments.
• Experience in leadership roles such as Team Lead, Engineering Manager, or Staff Engineer

Culture & Benefits

• A chance to build a product that actually matters to millions of people
• Freedom to work remotely with a globally distributed team
• Offsites in different countries with people who actually like each other
• A trustworthy, high-responsibility environment where your ideas really matter