Search - Workchat - Applied Data Scientist II

Elastic; United Kingdom; Remote; GBP 50,000 - 70,000; Full time

Job summary

A leading data technology firm is seeking a Data Scientist for their Conversational Experiences team. You will enhance customer interaction with Elasticsearch data, focusing on evaluating AI agent workflows and improving chat quality. Ideal candidates should have 3-5 years of experience in applied data science or ML, with strong skills in evaluation metrics and familiarity with Elasticsearch. This role offers competitive pay and a flexible work schedule.

Benefits

Competitive pay

Health coverage

Flexible work locations

Generous vacation days

Donation matching

Parental leave of 16 weeks

Qualifications

• 3 to 5 years in applied data science or machine learning.
• Proven experience evaluating agent workflows.
• Fluent with offline IR metrics like Recall at k and nDCG.

Responsibilities

• Own evaluation pipeline pieces for agent workflows.
• Calibrate and validate evaluation rubrics.
• Collaborate with engineers on product features.

Skills

Evaluation of LLM workflows

Data Science or ML experience

Communication skills

Elasticsearch experience

Education

Bachelor's or Master's degree in relevant field

Tools

Elasticsearch

Python

Job description

Overview

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale. Elastic’s Search AI Platform helps organizations deliver on the promise of AI by combining the precision of search with the intelligence of AI, across security, observability, and data analytics.

What is The Role

The Search Conversational Experiences team builds Elastic's new conversational (agentic) platform that lets customers chat with their own data in Elasticsearch. We own the quality layer for RAG, agents and tools, retrieval/citations, streaming, memory, and crucially the evaluation signals that turn open-ended questions into grounded, reliable answers. As a Data Scientist, you'll be part of a cross-functional team (backend, DS, PM, UX) driving chat quality end-to-end: designing and running evaluation pipelines, improving prompts and tool behaviors, and turning measurements into product decisions that customers can feel.

You'll help tackle frontier problems—folding RAG and vector search into an agent's knowledge base, dynamically enriching model context to boost groundedness, shaping agent routing and tool selection policies, lighting up agent-driven visualizations on top of Elasticsearch data, and exploring multimodality and reasoning strategies where they truly move the needle. This is an applied role: you will prototype, evaluate, and partner with engineers to ship.

What you will be doing

• Own well scoped pieces of the offline and online evaluation pipeline for agent workflows: retrieval coverage, reranking quality, reasoning traces, tool selection accuracy, citation integrity, and final answer helpfulness and faithfulness
• Calibrate and validate LLM-as-judge rubrics against human labels, track agreement with statistics, and add periodic checks to prevent drift
• Instrument agent runs with traces so you can localize errors to retrieval, reasoning, tool execution, or grounding, then contribute CI checks that block merges on regressions
• Translate evaluation readouts into product calls such as model choice, routing policy, tool gating thresholds, prompt and chunking updates, and agent customization for Elastic use cases
• Collaborate with backend engineers on contracts for ES|QL, citations, and telemetry schemas, and with PM and UX to land findings in shipped features
• Share outcomes through clear docs, notebooks, and PRs, and contribute utilities that make evaluation faster and more reproducible for the team

What you will bring

• 3 to 5 years in applied DS or ML with production ownership, including at least 1 to 2 years focused on evaluating LLM or agent workflows in shipped systems
• Proven experience designing and running stepwise evaluations for agent pipelines: retrieval coverage, reranking quality, reasoning traces, tool selection accuracy, citation grounding, and final answer helpfulness and faithfulness
• Golden set hygiene: stratified dataset design, leakage controls, reviewer guidelines, inter-rater checks, and versioned labels
• Fluent with offline IR metrics and guardrails: Recall at k, nDCG, MRR, groundedness or citation support, plus latency and cost tracking; can move from offline gains to online A/B tests
• Telemetry and traces for agent runs that localize failures to retrieval, reasoning, tool execution, or grounding; ability to add CI quality gates that block merges on regressions
• Practical Elasticsearch experience or a similar search system; ES|QL familiarity is a plus
• Strong written communication and async collaboration habits in a distributed team

Additional Information - We Take Care of Our People

As a distributed company, diversity drives our identity. Elastic is the type of company where you can balance great work with great life. Your age is only a number. It doesn’t matter if you're just out of college or your children are; we need you for what you can do.

We strive to have parity of benefits across regions and while regulations differ from place to place, we believe taking care of our people is the right thing to do.

• Competitive pay based on the work you do here and not your previous salary
• Health coverage for you and your family in many locations
• Ability to craft your calendar with flexible locations and schedules for many roles
• Generous number of vacation days each year
• Increase your impact - We match up to $2000 (or local currency equivalent) for financial donations and service
• Up to 40 hours each year to use toward volunteer projects you love
• Embracing parenthood with minimum of 16 weeks of parental leave

Different people approach problems differently. We need that. Elastic is an equal opportunity employer and is committed to creating an inclusive culture that celebrates different perspectives, experiences, and backgrounds. Qualified applicants will receive consideration for employment without regard to race, ethnicity, color, religion, sex, pregnancy, sexual orientation, gender perception or identity, national origin, age, marital status, protected veteran status, disability status, or any other basis protected by federal, state or local law, ordinance or regulation.

We welcome individuals with disabilities and strive to create an accessible and inclusive experience for all individuals. To request an accommodation during the application or the recruiting process, please email [e-mail]. We will reply to your request within 24 business hours of submission.

Applicants have rights under Federal Employment Laws, view posters linked below: Family and Medical Leave Act (FMLA) Poster; Pay Transparency Nondiscrimination Provision Poster; Employee Polygraph Protection Act (EPPA) Poster and Know Your Rights (Poster)

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