4 hours ago
London, United KingdomSenior
Responsibilities
- Design and build agentic workflows and AI-powered features for Elliptic’s copilot using LLM frameworks such as LangChain or LangGraph.
- Lead the design of agents, tool integrations, retrieval pipelines, and multi-step systems that transform blockchain data into investigation insights.
- Build evaluation frameworks for LLM output quality, reliability, latency, regression behavior, and rollout safety.
- Design and own backend services, APIs, and event-driven systems using TypeScript and Node.js.
- Drive technical design reviews and architecture decisions for AI workstreams.
- Mentor and coach junior engineers through pairing, code reviews, and design feedback.
- Improve engineering practices for testing, observability, AI reliability, prompt management, and production operations.
- Influence how AI capabilities integrate with Elliptic’s broader platform and ship significant AI capabilities end-to-end.
Requirements
- 5-8+ years of software engineering experience, including at least 1-2 years of meaningful production experience building LLM-powered features.
- Experience with LLM frameworks such as LangChain, LangGraph, or similar tools.
- Hands-on experience building agentic systems involving tool use, multi-step reasoning, planning, memory, and human-in-the-loop patterns.
- Practical knowledge of prompt engineering, structured outputs, context management, and LLM trade-offs.
- Experience building and running LLM evaluations, including evaluation sets, LLM-as-judge approaches, and regression testing.
- Strong backend skills in TypeScript and Node.js with solid API design experience.
- Cloud experience with AWS services such as Lambda, ECS, and S3.
- Database proficiency with SQL and Postgres, plus some NoSQL exposure.
- Demonstrated ability to mentor and coach other engineers.
- Effective use of AI coding assistants such as Copilot, Cursor, or Claude.
- Preferred experience with RAG, vector databases, multi-agent systems, agent orchestration, LLM observability, multiple model providers, fine-tuning, Terraform, Kubernetes, infrastructure-as-code, Datadog, SNS, SQS, cryptocurrency, blockchain, or compliance.
Benefits
- Hybrid working arrangement with the option to work from almost anywhere for up to 90 days per year.
- £500 remote working budget for home-office setup.
- $1,000 learning and development budget.
- 25 days of annual leave plus bank holidays and an additional birthday day.
- Enhanced parental leave of 16 weeks fully paid for eligible employees.
- Private health insurance through Bupa, Spill mental-health support, life assurance, and Cycle to Work Scheme.
Tech Stack
Categories
About Elliptic
Elliptic provides blockchain analytics and crypto compliance software and data to banks, exchanges, fintechs, regulators, and law enforcement. Its SaaS platform and APIs power transaction monitoring, wallet screening, and investigations across multiple blockchains, built on a proprietary graph database. Founded in 2013 and headquartered in London, the privately held company operates offices in the US, Europe, the Middle East, and Asia-Pacific.