Senior NLP Engineer

We’re reinventing the AI dating space with Blush, an AI-powered dating simulator that helps people practice relationship skills in a safe, judgment-free environment. Our team brings a long track record in conversational AI, drawing on experience building Replika, one of the world’s most popular AI companion platforms, with 30M+ users. As featured in Fast Company, TechCrunch, and Axios, we use AI to enhance human connections and build confidence in real-world relationships.

Blush offers AI-generated potential matches with unique backstories and personalities, enabling users to practice communication skills, explore different relationship dynamics, and build dating confidence.

The Role

We’re looking for a Senior NLP Engineer to join our mission of creating meaningful AI-powered experiences that help people connect more authentically. You’ll build the chat experience and contribute across the AI stack to make conversations and relationships with our AI characters feel as realistic and dynamic as possible.

Responsibilities:
- Develop and operate production NLP services and LLM inference systems, ensuring their observability and availability
- Improve chat quality: memory, character consistency, engagement, and the overall conversational experience
- Analyze the performance of new features through offline/online evaluations and A/B tests
- Collaborate with product and engineering teams to ship cross-functional features

Requirements:
-Experience operating production systems: Docker, CI/CD, observability (metrics/logs/monitoring); familiarity with Ansible/TeamCity/Datadog is a plus
-Proficiency in building and maintaining Python services using FastAPI or Flask
-Experience running efficient LLM inference with TensorRT-LLM, vLLM, or SGLang
-Strong understanding of modern NLP/LLMs. Practical experience developing conversational AI systems is a strong plus
-Comfortable with SQL; experience with ClickHouse/PostgreSQL/Athena and with DVC pipelines is a plus
-Strong teamwork and clear communication skills

Nice to have:
-Experience processing images with VLMs is a strong plus
- Experience building RAG systems
- Experience with A/B testing
- Experience or interest in developing image- and video-generation services

Our work has been recognized by leading publications:

• Fast Company

• TechCrunch

• CNN

• Axios

• Document Journal

Apply

Ready to help us shape the future of AI-powered relationships? Send your CV to [email protected]