Founding ML Engineer (Spectrum)

Stack

Responsibilities

• ▹Design and build the ML/LLM solution for data ingestion, knowledge extraction, retrieval and subsequent reasoning
• ▹Create the datasets, metrics and pipelines that drive measurable improvements across the system
• ▹Architect and improve agents for context retrieval, knowledge extraction and data alignment, including prompt engineering, model selection and inference optimization
• ▹Establish MLOps practices, including orchestration, observability and experiment tracking
• ▹Collaborate with the engineering team on system design and with JetBrains Research on the research agenda
• ▹Define hiring criteria, grow the ML team and shape the ML team culture

Requirements

• ▹A proven track record as an ML/AI Lead
• ▹At least five years of experience in ML/AI systems, with at least two years focused on LLMs and generative AI
• ▹A deep understanding of the LLM ecosystem, including model architectures and fine-tuning approaches
• ▹Hands-on experience with prompt engineering and LLM pipeline design, including evaluation
• ▹Hands-on experience with agentic frameworks such as LangChain, LlamaIndex, LangSmith, smolagents or an equivalent
• ▹Hands-on experience with vector databases and retrieval-augmented generation (RAG) patterns
• ▹Experience deploying and scaling LLM-powered applications using APIs (e.g. OpenAI or Anthropic) or open-source models
• ▹Strong Python skills
• ▹Excellent communication skills, with the ability to explain complex technical concepts to diverse audiences
• ▹Proficiency in English, both written and verbal

Nice to have

• ▹Kotlin knowledge
• ▹Experience with ontologies, knowledge graphs or graph-based reasoning
• ▹Experience in early-stage startups: you enjoy the zero-to-one phase
• ▹Ability to think strategically about product-led AI, beyond just training models in isolation
• ▹A background in code analysis, developer tools or software engineering research
• ▹Experience with multi-agent systems or complex agentic workflows
• ▹Actively contributed to relevant open-source projects or publications

Soft skills

What we offer

• ▹A competitive salary and JetBrains benefits
• ▹A generous runway and corporate resources with startup autonomy

About the company

Spectrum is a resident of JetBrains' startup incubator, with startup speed and autonomy, backed by 25 years of developer tooling expertise. It aims to organize knowledge from an organization's code, docs and issues into a unified ontology that AI agents can search and reason over.