Senior AI Engineer

Srotas Health; United Kingdom; On-site; GBP 110,000 - 150,000; Full time

Benefits offered by this job

Equity options

Job summary

Srotas Health is building an Agentic AI platform to transform clinical research workflows in the UK. We design AI that reads and reasons over messy healthcare data, including EHRs, PDFs, notes, and trial criteria, delivering scalable, reliable systems used by clinicians and researchers.

You will lead end-to-end development of AI systems for patient identification, trial feasibility, recruitment automation, and agentic workflows, in a startup environment that values ownership and pragmatic

Qualifications

• Strong hands-on experience building production AI applications using LLMs, RAG, or agents.
• Experience shipping production-grade AI systems, not just prototypes.
• Strong Python/Node.js software engineering skills.
• Experience with large-scale data processing and ETL/ELT pipelines.
• Experience with vector databases and search/indexing.
• Understanding prompt design and multi-step AI workflows.
• Ability to handle messy real-world healthcare data end-to-end.

Responsibilities

• Design and build AI systems for patient identification and clinical trial feasibility.
• Develop recruitment automation and agentic workflows.
• Build scalable data ingestion pipelines across EHR data, PDFs, notes, and trial criteria.
• Develop embedding, retrieval, and ranking pipelines using Milvus and Elasticsearch.
• Improve reliability, latency, and cost-efficiency of AI production workflows.
• Collaborate with open-source and hosted models for extraction, classification, and matching.

Skills

LLMs & RAG

Agentic AI

Python

Data pipelines

Vector databases

System design

Production reliability

Tools

Milvus/Zilliz

Elasticsearch

NLP tooling

Job description

Strictly UK applicants only, who hold UK work authorisation.

At Srotas Health, we are building an Agentic AI workforce for clinical research.

Clinical trials are one of the most important parts of healthcare, yet the way patients are identified, screened, contacted, and managed is still highly manual.

We are changing that.

Srotas Health is building the intelligence layer for the future of clinical research.

Our platform is already live across the US and UK, supporting research sites, processing more than 3 million patient records, and operating across 60+ therapeutic areas. We work with leading research networks, healthcare organisations, and strategic partners to solve one of the biggest bottlenecks in healthcare innovation.

This is not a research project or a proof of concept. We have paying customers, real-world deployments, and some of the most challenging AI problems in healthcare.

We're looking for a Senior AI Engineer who wants to build AI that matters production systems used by clinicians, researchers, and healthcare organisations every day.

If you're excited by large-scale data, agentic AI, complex reasoning, and the opportunity to have a direct impact on patient access to life-changing treatments, you'll feel at home here.

The Role

This is not a narrow LLM wrapper role.

You will work across the core intelligence layer of Srotas Health: RAG, Agentic RAG, multi-agent systems, clinical data reasoning, large-scale data pipelines, embeddings, vector search, AI orchestration, and production inference.

You will help build systems that can read and reason over messy healthcare data: structured EHR data, unstructured PDFs, clinical notes, lab results, eligibility criteria, trial protocols, patient timelines, and recruiter workflows.

You should be comfortable with ambiguity, fast iteration, and deep technical ownership. We are a startup, so the expectation is not just to write code, but to understand the problem, challenge assumptions, improve architecture, and ship reliable systems that work in real customer environments.

What you'll work on

You will design and build AI systems for patient identification, clinical trial feasibility, recruitment automation, and agentic workflows.

This includes:

• Building RAG and agentic AI systems over structured and unstructured clinical data.
• Designing workflows for eligibility reasoning, patient matching, recruitment automation, and recruiter assistance.
• Developing large-scale data ingestion and processing pipelines across EHR data, FHIR resources, PDFs, clinical notes, and trial criteria.
• Building embedding, indexing, retrieval, reranking, and evaluation pipelines using tools such as Milvus/Zilliz, Elasticsearch, and domain-specific embedding models.
• Improving the quality, reliability, latency, and cost-efficiency of AI workflows in production.
• Working with open-source and hosted models for extraction, classification, reasoning, summarisation, and patient-trial matching.
• Designing evaluation frameworks to measure accuracy, retrieval quality, hallucination rates, and overall system performance.
• Helping build infrastructure capable of processing millions of patient records and large volumes of healthcare data.
• Improving prompt design, tool usage, orchestration logic, and system robustness.

What we're looking for

We are looking for someone who has worked in a startup or high-ownership environment before.

You should have strong engineering fundamentals and a deep understanding of how modern AI systems behave in production including where they fail.

You should be someone who can think beyond “calling an LLM API” and understand the broader challenges of building reliable AI systems: retrieval quality, context construction, evaluation, latency, model selection, data quality, orchestration, cost, and observability.

Must Have

• Strong hands-on experience building production AI applications using LLMs, RAG, agents, or related architectures.
• Experience shipping and maintaining production-grade AI systems, not just prototypes.
• Strong software engineering skills in Python, Node.js, or similar languages.
• Experience with large-scale data processing, ingestion pipelines, ETL/ELT, or workflow orchestration.
• Experience with vector databases, embeddings, search, indexing, retrieval, and ranking systems.
• Understanding of prompt design, structured outputs, tool calling, and multi-step AI workflows.
• Ability to work with messy real-world data and design robust, scalable pipelines.
• Experience working in a startup, early-stage company, or similarly fast-moving environment.
• Ability to take ownership of problems end-to-end, from architecture and implementation through deployment, monitoring, and iteration.

How We Work

We are a small, high-ownership team building in a complex and meaningful space.

You will be expected to move fast, but with discipline. Clinical research is not a space where flashy demos are enough. Accuracy, reliability, auditability, privacy, and operational usefulness matter.

We value people who:

• Think from first principles.
• Care deeply about product and customer impact.
• Can operate with ambiguity.
• Are comfortable taking ownership without waiting for detailed instructions.
• Challenge ideas respectfully.
• Ship fast, learn quickly, and improve continuously.
• Understand that building real AI products means dealing with messy data, edge cases, latency, costs, and failure modes.

This is a role for someone who wants to build at the frontier of applied AI in healthcare.

Compensation

We offer a competitive salary package with meaningful equity options.

For the right person, this role is designed to be a long-term, high-impact position within the company.

You will be joining at an important stage of growth, with the opportunity to shape the AI architecture, technical direction, and product intelligence layer of Srotas Health.