Founding Full Stack AI Engineer – AI Product
Up to £90k + equity
Remote UK (occasional travel to London or Leeds office)
A VC-backed AI start-up on a mission to transform how deals get done is looking for a Founding Full Stack AI Engineer to join their fast-moving team. You’ll play a pivotal role in shaping the product and technical vision from day one—building a scalable platform that blends cutting-edge AI with a slick user experience.
This is the perfect role for someone who thrives in an early-stage environment, enjoys tackling complex problems end-to-end, and wants their code to have immediate, visible impact.
What You’ll Be Doing
* Backend engineering: Design and build secure, scalable APIs in Python/FastAPI to power AI-driven features and data retrieval.
* Retrieval-Augmented Generation (RAG): Architect and iterate RAG pipelines—chunking strategies, embeddings, hybrid search, ranking, and feedback loops—to maximise relevance and minimise latency.
* Vector search & databases: Own vector schemas and infrastructure (pgvector/FAISS/Weaviate), balancing recall/precision trade-offs and optimising cost/performance.
* LLM integration: Integrate and orchestrate OpenAI/Bedrock models; handle prompt/response flows, tool use, guardrails, and evaluation frameworks.
* Data pipelines & analytics: Ingest and transform structured/unstructured data; design efficient SQL/NoSQL schemas to support high-performance retrieval and analytics.
* Frontend development: Create fast, accessible UIs with React/Next.js, exposing complex AI features (search, filters, explanations, citations) in a clear and user-friendly way.
* Architecture & DevOps: Shape a modular, cloud-native platform (AWS/ECS, Docker), with robust CI/CD, testing, and observability.
* Product strategy: Collaborate directly with the founding team to define the technical roadmap and contribute to research on new AI tools and frameworks.
What Experience You’ll Bring
* 5+ years’ professional full-stack development with solid computer science fundamentals.
* Deep Python (FastAPI) and React/Next.js expertise.
* Proven, hands-on AI engineering experience: building RAG systems, vector/embedding pipelines, and hybrid search solutions.
* Strong understanding of embeddings, metadata design, indexing, reranking, and evaluation (offline/online metrics).
* Proficiency with SQL & NoSQL data modelling and cloud infrastructure (AWS preferred) plus containerised deployments (Docker/ECS).
* Familiarity with LLM tools (e.g., LangChain/LlamaIndex) and evaluation techniques is a strong plus.
* Start-up mindset: independent, proactive, and able to take ownership end-to-end without heavy mentoring.
Why Join
* Founding-team impact with meaningful equity
* Build a groundbreaking AI product from the ground up
* Flexible remote-first UK working, with optional London meetups
* Competitive salary and a culture that values innovation and autonomy
Sound like a good fit? Hit apply and let’s chat!