CreateFuture

platform engineer for AI evaluation

In short

Senior-level contract role building evaluation and observability pipelines for LLM-backed features on platforms like Braintrust, LangSmith, Arize or Weights & Biases for CreateFuture, an AI-native consulting partner, on client programmes. The work spans golden datasets, LLM-as-judge and human-in-the-loop scoring, CI/CD evaluation gates, drift detection and client knowledge transfer. It demands strong production-grade Python, hands-on evaluation-platform experience, and the ability to communicate technical results to non-technical audiences.

About CreateFuture
CreateFuture is an AI-native consulting partner that works alongside organisations to build digital products and services. Its team develops software, shapes delivery and go-to-market strategies, and creates AI solutions.
Responsibilities
•Design and build evaluation pipelines on a platform such as Braintrust, LangSmith, Arize or Weights & Biases, and select the platform that fits the problem
•Curate golden datasets representing real user behaviour and design LLM-as-judge and human-in-the-loop scoring pipelines
•Build token-level tracing, quality monitoring, hallucination and refusal detection, per-use-case cost attribution, and alerts that catch degradation before users report it
•Integrate evaluation gates into CI/CD promotion paths so regressions block releases
•Establish baselines, regression suites and drift detection for changes to prompts, models and retrieval
•Assess statistical signals, size evaluation sets appropriately, and explain when data cannot answer a question
•Present evaluation and observability findings to engineering and product audiences, drive decisions and follow through on resulting changes
•Help client teams adopt evaluation-first practices and challenge "ship it and see" approaches with evidence
•Plan and prioritise the workstream, estimate accurately, manage changing requirements without compromising quality, and flag timeline risks early
•Design evaluation runs and judge models to balance cost and confidence, and justify the approach to budget holders
•Work with the client's existing tools and release process where appropriate, and make the case for changes where needed
•Document dataset provenance, scoring rationale and runbooks so client engineers can maintain and extend the evaluation suite
•Transfer knowledge to client engineers on evaluation practices, prompt and context engineering, and critical review of model output
•Make a clean handover part of the definition of done from the first sprint
Requirements
•Strong, production-grade Python skills and the ability to write maintainable code
•Hands-on production experience with Braintrust, LangSmith, Arize, Weights & Biases or an equivalent evaluation and observability platform
•Demonstrable experience designing LLM-as-judge and human-in-the-loop pipelines and calibrating them against human judgement
•Experience operating LLM-backed features in production, including tracing, latency, token cost, failure modes and retrieval quality
•Sufficient fluency with GitHub Actions, GitLab CI or similar to own an evaluation gate in a promotion pipeline
•Experience building data pipelines and stores for datasets, traces and results at volume
•Ability to communicate technical results to non-technical audiences and tailor the framing to the audience
•A track record of becoming productive quickly on unfamiliar programmes and building credibility with engineers
Nice to have
•Experience in regulated industries where model behaviour has compliance or consumer-protection consequences, including iGaming, financial services or health
•Experience in safer gambling or responsible-messaging contexts
•An evaluation framework, write-up or open-source contribution
•AWS Certified Machine Learning Engineer (Associate), AWS Certified AI Practitioner, or an associate-level AWS or GCP certification
Conditions
•Contract engagement delivering a defined scope of work on a client programme
•Duration, rate and IR35 status will be confirmed at first contact
•Travel to client sites or CreateFuture offices may be required as the programme requires
•35 days of leave, including bank holidays
•Private medical insurance
•Enhanced parental and adoption leave
•Financial coaching and a 5% pension match
•40 hours of paid learning and development
•Flexible working, with hybrid and remote options
•Flexible time management balancing collaboration, client time and focused work

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