Whalar
AI

Senior Machine Learning Engineer

Whalar · London, ENG, GB · $40k

Actively hiring Posted about 2 hours ago

Role overview

We're looking for a Senior Machine Learning Engineer (Level 2/3) to join our growing ML Engineering team and lead the development of advanced AI systems that power our platform. You'll design and deploy the core intelligence behind our products, with a focus on building autonomous, stateful AI agents capable of reasoning, learning, and acting in dynamic environments.

What you'll work on

  • Design and deploy autonomous AI agents, including reasoning loops, memory layers, and orchestration pipelines.
  • Build observability and evaluation systems to monitor reasoning, token usage, and model performance, ensuring reliable production behavior.
  • Lead the development of multimodal ML pipelines for semantic search, RAG, recommendation systems, and vector search across text, image, and video data.
  • Engineer high-throughput time-series analytics and forecasting models that connect batch OLAP queries with real-time inference.
  • Develop and maintain scalable asynchronous APIs and containerized services, ensuring reliability, monitoring, and performance optimization.
  • Partner with product and engineering teams to translate business goals into measurable ML outcomes.
  • Drive research-to-production pipelines for experimental AI projects and evaluate emerging technologies to advance our platform.

What we're looking for

  • 4+ years of experience in machine learning engineering, building production-grade ML systems.
  • Hands-on experience with agentic AI frameworks (e.g., LangGraph, LlamaIndex, Zep, Mem0, Langfuse, LangSmith).
  • Experience building RAG pipelines, recommendation systems, and/or vector search applications (e.g., Pinecone, Vespa, PostgreSQL + pgvector).
  • Strong background in time-series modeling, anomaly detection, and large-scale data analysis (e.g., Clickhouse).
  • Skilled in asynchronous API design, containerization, and modern CI/CD workflows (FastAPI, Docker, Kubernetes, GitHub/Bitbucket).
  • Excellent EDA skills with the ability to translate data insights into production-ready ML solutions.
  • Comfortable working with LLM ambiguity, designing systems that fail gracefully and learn continuously.
  • Proactive, independent, and curious—able to own complex features end-to-end and raise the technical bar for the team.
  • Strong communication skills—able to explain trade-offs between AI approaches and align technical metrics to business goals.
  • Experience leveraging AI tools and functionality to improve workflow efficiency, research, and experimentation.

Tags & focus areas

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Ai Machine Learning