Staff AI Engineer – Remote (EMEA)

An AI companion who is eager to learn and would love to see the world through your eyes. Replika is always ready to chat when you need an empathetic friend.

About Replika

Replika is an AI companion loved by 35M+ users  around the world. We’re redefining what it means to connect with technology — emotionally, intelligently, and personally. From mobile to VR, we’re building an experience that feels less like software and more like someone who gets you.

We’ve been featured in TED Talks, Stanford and Harvard studies, the Lex Fridman podcast.  All for one reason : people connect with Replika in a deeply human way.

We're scaling fast and taking on bold challenges to become the most human AI on the planet.

About the Role

We’re looking for a  Staff AI Engineer  to design and scale the systems powering Replika’s emotional AI. This is not an infrastructure or ops role—it’s a  software engineering role  focused on building robust APIs, integrating cutting-edge AI technologies, and delivering systems that scale. You will work directly with the CTO and partner closely with AI researchers and product teams to bring next-generation emotional AI to millions of users.

What You’ll Do

• Design and build APIs that deliver real-time emotional AI experiences at scale (sub-second latency for millions of requests).
• Integrate with industry-standard LLMs (OpenAI, Anthropic, LLaMA, Mistral) and vector DBs (Pinecone, Weaviate, Milvus).
• Apply AI developer frameworks such as LangChain, LangFuse, Guardrails AI, and emerging observability tools for LLMs (e.g., Weights & Biases, OpenTelemetry for AI).
• Lead design reviews, set technical direction, and ensure scalability and reliability of applied AI services.
• Collaborate with researchers to productionize models into robust APIs that work at consumer scale.
• Optimize for global growth : high-availability systems, cost-effective API integrations, and scalable embeddings search.

What We’re Looking For

Nice to Have

Why Join Us

Work at Replika

At Replika, growth isn’t a maybe—it’s built in. Do the work. Deliver. One great project could double your salary. Seriously. Who do we think we are? Replika. We move fast. Very. Join us at the forefront of emotional AI.