Full-Stack AI Engineer

Phaselink โ€” United Kingdom ยท Posted ~1 day ago

Mid

Skills

Production AI LLM agents RAG Prompt engineering AI evaluation Python TypeScript Next.js PostgreSQL Application development APIs and integrations Authentication Billing systems LLMs Vercel Anthropic OpenAI Vertex AI

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Summary

A technology team is looking for a full-stack AI engineer with 3+ years of production AI experience to build LLM-powered agents using tools and RAG. You will own evaluation suites, prompt engineering, and model-selection decisions, while also building dashboards, integrations, authentication, billing, and the supporting infrastructure. Strong Python or TypeScript skills are required, along with hands-on experience across at least two major LLM platforms or local models. Public technical writing or open-source work is also expected.

Highlights

Build production-grade AI agents on real-world data, own evaluation systems and model-selection decisions, work across the full application stack, and have visible impact on client-facing AI products and infrastructure.

Description

Design, build, and ship LLM-powered agents on real production data. You own evals, prompt engineering, and the model-selection calls that make pilots succeed or fail. What you'd ship Build production agents (LLM + tools + RAG) for client operationsWrite and own eval suites โ€” your work outlives every model migrationDrive vendor selection: Anthropic vs OpenAI vs open-source, by use casePair with consulting on discovery; write the ADR before the code Must-haves 3+ years shipping AI in production (not just notebooks)Comfort across at least two of: Anthropic, OpenAI, Vertex, local modelsStrong Python or TypeScript; you've written evals from scratchPublic writing or open source we can read Build the application layer around the agent โ€” dashboards, integrations, auth, billing. You own the surface clients see and the infrastructure that keeps it up. What you'd ship Next.js / TypeScript / Postgres / Vercel โ€” end to endCustom integrations with client tools (Salesforce, HubSpot, Zendesk, custom)Build internal tooling that makes the consulting + AI team fasterOwn observability, CI/CD, and the on-call rotation Must-haves 4+ years shipping full-stack at production scaleStrong React + TypeScript; you reach for SSR / RSC by defaultComfortable owning infra (Vercel, Postgres, queues, jobs)Pragmatic โ€” you'll cut a feature to ship the deadline Own top-of-funnel: paid acquisition, lead-gen experiments, conversion, attribution. You run experiments end-to-end, from hypothesis to pipeline impact, with a real budget. What you'd ship Build and optimize paid acquisition (LinkedIn, Google, programmatic)Design and run experiments on hero, pricing, contact, applyOwn attribution model + pipeline reporting from first touch to closed-wonTight loop with sales โ€” every campaign tied to qualified meetings Must-haves 3+ years running paid acquisition for B2B SaaS or servicesYou've owned a marketing budget โ‰ฅ$30k/mo and can show the dashboardFluent in attribution (UTM, dbt, GA4, or your own stack)Strong on conversion copy โ€” you can ship the headline yourself Compound organic distribution through long-form, technical content and GEO/AI-search optimization. You own the pillar guide library, industry pages, and ranking strategy. What you'd ship Write or commission deep technical content on AI implementationOptimize for both Google and AI-answer engines (ChatGPT, Claude, Perplexity)Build and maintain a programmatic SEO surface (industries, services, use-cases)Pair with founders on thought leadership โ€” long-form, signed pieces Must-haves Strong writing portfolio with technical depth (engineering-adjacent)You've moved a domain from