Senior AI Infra Engineer: Agentic Systems & Orchestration

Mytechtree; United Kingdom; On-site; GBP 75,000 - 99,000; Full time

Job summary

A leading technology company in the UK is seeking a Founding Staff Engineer to build AI infrastructure focusing on agent orchestration and reasoning engines. The role requires deep Python expertise and 5+ years experience in backend or AI systems. Join a dynamic founding team solving real and complex problems in AI. Offering competitive salary and 1% equity, this full-time position is perfect for hands-on builders motivated to innovate.

Benefits

1% equity

Qualifications

• 5+ years of experience in backend, infra, or AI systems roles.
• Deep Python expertise.
• Real-world experience building agentic systems.
• Expertise in ontology development, schema reconciliation, and knowledge graphs.
• Strong foundations in modern data infra and cloud (GCP or AWS).
• Background in symbolic AI, reasoning systems, or semantic data modeling.
• Experience at an early-stage startup.

Responsibilities

• Build core agent infrastructure and scalable agent orchestration.
• Engineer automated ontology systems connecting data sources.
• Own agent runtime for planning, tool execution, and observability.
• Scale data infrastructure and maintain metadata stores.
• Advance reasoning engines with LLM + symbolic reasoning pipelines.

Skills

Python

open-source LLM frameworks

LangChain

LlamaIndex

ontology development

schema reconciliation

knowledge graphs

modern data infrastructure

dbt

BigQuery

Airflow

cloud (GCP or AWS)

symbolic AI

reasoning systems

semantic data modeling

AI tools (Cursor)

Windsurf

Cody

Job description

A leading technology company in the UK is seeking a Founding Staff Engineer to build AI infrastructure focusing on agent orchestration and reasoning engines. The role requires deep Python expertise and 5+ years experience in backend or AI systems. Join a dynamic founding team solving real and complex problems in AI. Offering competitive salary and 1% equity, this full-time position is perfect for hands-on builders motivated to innovate.