Senior Python Backend Engineer - ML Infrastructure

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Direct message the job poster from Heart Mind Talent

Senior Talent Partner/Sourcer | Ex- Meta | Ex- Spotify

We’re building the future of AI-powered legal tech — including one of the world’s first AI lawyers, built on a fine-tuned LLM's and novel AI research

We’re looking for a Senior Software Engineer to help us bring cutting-edge machine learning into the hands of real users at scale. You’ll be part of a mission-driven team using AI to make legal help radically more accessible.

Backed by top-tier VCs and a substantial Series A funding round, we’re growing fast — and we want brilliant engineers to grow with us.

What you’ll be working on

  • Build & Improve Backend Systems: Work with Python (FastAPI, Pydantic) to develop robust APIs and services that interface with LLMs.
  • Develop & Maintain Scalable Infrastructure
  • Long-Running Workflows & Orchestration
  • Real-Time Communication Infrastructure
  • Document Storage & Retrieval
  • Build Data Pipelines
  • Infrastructure Decision-Making

You should have

  • Strong Backend Development Skills: Proficiency in Python, FastAPI, Pydantic.
  • Infrastructure Expertise: Experience with AWS services (Lambda, S3, ECS, EventBridge, RDS, OpenSearch) and Terraform.
  • Event-Driven Systems Knowledge: Experience designing and implementing event-driven architectures (SNS/SQS, Kafka, Redis Streams, etc.).
  • Orchestration & Workflows: Experience with long-running workflow solutions like Ingest, Step Functions, Temporal, or Airflow.
  • Data Engineering Mindset: Experience designing scalable ETL pipelines and working with structured/unstructured data.
  • Knowledge of Vector Databases
  • Ship daily – we release fast and iterate even faster
  • Empathise with users – we build for lawyers and clients with deeply human problems
  • Strive for excellence – we want to build a generational company, and that means high standards
  • Experiment and learn – we’re on the frontier of applied AI, and we’re always testing new ideas
  • Remote-friendly

Seniority level

  • Mid-Senior level

Employment type

  • Full-time

Job function

  • Engineering and Research

Industries

  • Information Services and Technology
  • Information and Media

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Location:
London, England, United Kingdom
Salary:
£125,000 - £150,000
Job Type:
FullTime
Category:
IT & Technology

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