Senior Software Engineer, UnlikelyAI

• To meet the demands of our growing commercial momentum, we are looking for a smart, dedicated senior software engineer to join our team
• We want someone who thrives on diving deep into code to solve challenging and novel problems
• You will have extensive software engineering experience, with exceptional coding ability, ideally including experience in high-growth start-ups
• ...you have strong proficiency in Python, including writing well-typed, well-tested code in a collaborative codebase
• ...you've tackled complex algorithms and data structures and have experience working with non-trivial algorithmic problems
• ...you care deeply about production-quality engineering – you have a track record of advocating for software quality, improving engineering standards, and championing best practices
• ...you thrive with end-to-end ownership – you've led the process from ideation to production for brand-new software systems
• ...you have experience with cloud infrastructure (AWS preferred) – services such as S3, ECR, ECS/EKS, and infrastructure managed via Terraform or similar
• ...you have a bias for action – you move quickly, make informed decisions, and iterate without waiting for perfect information
• ...you have a relevant degree in Computer Science, Mathematics, Engineering, or STEM – or equivalent practical experience

Desirable

• This role will play a major part in developing our core capabilities, which span symbolic reasoning (decision trees, propositional graphs, knowledge graphs), document ingestion pipelines, and the APIs that expose these to customers
• You'll work on genuinely novel problems at the intersection of classical symbolic AI and modern LLMs – for example, how to represent regulatory knowledge as machine-evaluable rules, or how to build feedback loops that improve system accuracy over time
• You'll work within a shared monorepo alongside software engineers, research engineers, and applied scientists in a heavily cross-functional environment
• We operate in small, focused product teams, supported by shared infrastructure, internal tooling, and an R&D function
• In your first months, you could find yourself working on any of the following:
• Building the infrastructure for our new public API, including authentication, scalability, and developer documentation
• Improving our document ingestion pipelines to handle new input formats (e.g. PDF, Word) and new regulatory jurisdictions
• Developing evaluation frameworks and benchmarks to measure and improve system accuracy
• Scaling our deployment approach for enterprise customers with specific cloud and security requirements
• Improving internal tooling and developer experience across the monorepo
• Working on the symbolic reasoning engine that powers our products – including decision tree evaluation, rule generation, and knowledge graph construction