Company: Jack & Jill
Apply for the Senior Software Engineer at Series A neurosymbolic AI startup founded by Alexa creator
Location: London
Job Description:
Job Title
Senior Software Engineer
Salary
Not Disclosed
Company Description
Series A neurosymbolic AI startup founded by the creator of Amazon Alexa
Job Description
You will architect the future of reliable AI by merging LLMs with proprietary symbolic reasoning technology. As a senior engineer, you’ll transition bespoke enterprise solutions into a scalable public platform, building high-performance APIs and document pipelines that deliver deterministic, explainable outcomes for top-tier financial institutions where accuracy is non-negotiable.
Location
London, UK
Why this role is remarkable
- Work under the leadership of William Tunstall-Pedoe, the founder behind Evi (the technology that became Alexa), alongside a team from Google and Amazon.
- Solve the “hallucination problem” in AI by building neurosymbolic guardrails that bridge the gap between probabilistic machine learning and deterministic computing.
- Join at a pivotal Series A transition point as the company moves from bespoke enterprise deployments to a global, developer-facing public API platform.
What You Will Do
- Design and build the infrastructure for a new public API, including authentication, high-scale architecture, and developer experience tooling.
- Develop complex symbolic reasoning engines that represent regulatory knowledge as machine-evaluable rules and knowledge graphs.
- Scale production-grade document ingestion pipelines to handle sophisticated data extraction and OCR across multiple jurisdictions and formats.
The ideal candidate
- Expert-level proficiency in Python with a track record of shipping well-typed, production-quality code in collaborative monorepo environments.
- Deep experience with complex algorithms and data structures, specifically applied to non-trivial engineering problems or symbolic AI.
- Proven ability to lead the end-to-end lifecycle of new software systems from initial ideation to large-scale production deployment.
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Posted: May 16th, 2026