Lead AI Engineer

Hybrid in Lisbon·Full-time·Added 10 months ago

This job was published 10 months ago

InteractiveAI

5 open roles

Overview

Job details

  • €110,000 - €130,000 a year

    Gross, as stated in the ad.

  • Permanent contract

    Full-time hours.

  • Hybrid

    Office and home days — the ad has the split.

Requirements

  • Be near Lisbon for hybrid days

    No relocation package mentioned.

  • Have 5+ years of experience

    Mid-level role.

Pay & benefits

What you'll get

  • Competitive base salary (from €110,000/yr to €130,000/yr) + performance bonuses
  • Access to equity/share plan as it rolls out.
  • Health & wellness allowances
  • Private health insurance
  • Flexible work setup + travel when needed (ideally Hybrid in Lisbon or Madrid)
  • 25 days of holidays/paid time off (excluding local public holidays)

The role

What you'll do

As a Lead AI Engineer at InteractiveAI, you’ll operate as the Chief of AI’s right hand, driving the technical direction of our AI stack, accelerating new use cases, and guiding the development of advanced GenAI capabilities across the platform.

You’ll take ownership of the design, development, and deployment of cutting-edge models, agentic architectures, and fine-tuning workflows. You will lead experimentation efforts, influence architecture decisions, mentor engineers, and ensure our AI systems are scalable, reliable, and aligned with enterprise requirements.

You’ll work in a cross-functional squad while also contributing to org-wide AI standards, frameworks, and best practices.

  • Build and maintain scalable pipelines for structured/unstructured data ingestion, transformation, and feature engineering
  • Lead the deployment of ML models and LLMs into production, ensuring performance, reliability, and traceability
  • Architect and oversee fine-tuning pipelines for LLMs with versioned checkpoints, evaluation suites, and experiment tracking
  • Design and implement automated evaluation frameworks (A/B testing, LLM-as-judge, validation suites) and monitoring dashboards to track latency, accuracy, drift, and trigger retraining or alerts
  • Guide feature engineering, imputation, and transformation strategies in complex, real-world scenarios
  • Implement and optimize retrieval-augmented generation (RAG) workflows, vector search approaches, and knowledge-grounding strategies
  • Lead the development of enterprise-grade agentic workflows, tooling integrations, and agent evaluation methods
  • Optimize inference speed, memory usage, and cost for high-throughput systems across the platform
  • Own reliability and performance of models in production, solving challenges around latency, accuracy, drift, and scaling
  • Collaborate with product and delivery teams to ship client-ready, measurable outcomes and accelerate new AI-driven features

What We’re Looking For

We’re looking for a top-tier AI engineer with strong foundations, proven delivery, and the leadership abilities required to build production-ready, enterprise-grade AI systems. You should be equally capable of executing hands-on and guiding the strategic evolution of our platform.

Who You Are

  • Proactive & Vision-Driven: You anticipate challenges, propose solutions, and help shape the future of our AI stack.
  • High-Ownership Leader: You move with accountability, take responsibility for outcomes, and raise the engineering bar.
  • Entrepreneurial & Adaptive: You thrive in ambiguity, operate with speed, and deliver in a high-paced startup setting.
  • Collaborative Mentor: You work across disciplines, guide others, and contribute to a culture of high performance.

Requirements

What we're looking for

  • 5+ years in data engineering, ML engineering, applied AI, or similar deep technical roles
  • Experience deploying ML models and LLMs to production at scale, with strong inference optimization skills
  • Hands-on experience with agent orchestration tools (LangGraph, LlamaIndex, or similar)
  • Experience training deep-learning models and fine-tuning LLMs using modern frameworks
  • Fluent in Python and experienced with at least one major deep learning library (PyTorch, TensorFlow, JAX, etc.)
  • Strong experience building production-grade data pipelines (batch or streaming) using tools like Airflow, Spark, Dagster
  • Solid understanding of ML theory (bias-variance tradeoff, probability, metrics, optimization, evaluation, etc.)
  • Comfortable with cloud platforms (AWS, GCP, Azure) and containerized deployments
  • Excellent communication skills with proven ability to mentor engineers or lead technical workstreams

Nice to have

  • Experience with LLMs and RAG pipelines in production environments
  • Familiarity with vector databases, embeddings, and document retrieval strategies
  • Exposure to MLOps practices: model monitoring, reproducibility, CI/CD for ML, automated evaluations
  • Experience optimizing inference latency, throughput, and cost at scale
  • Experience working in regulated or enterprise environments (e.g. banking, insurance)
  • Bonus: prior experience in technical leadership roles, architecture ownership, or acting as a technical right-hand to a CTO/Chief of AI

Hiring process

We keep our process focused and respectful of your time. Most candidates complete it in 2–3 weeks. Here’s what to expect:

  1. Intro Call – 30 minutes with our team to align on fit and expectations
  2. Culture & Values Alignment interview – Focused on your motivations to join InteractiveAI
  3. Live Coding Interview Challenge – A practical task based on real-world problems
  4. Delivery & Collaboration Interview – Working style, client interaction, communication
  5. Offer – Final conversation and offer details

We’re building a team of builders — people who care about impact, quality, and growth. If that’s you, let’s talk — careers@interactive.ai

About InteractiveAI

InteractiveAI is an artificial intelligence company that develops and deploys AI-powered virtual assistants and automation solutions for enterprise clients. The company builds custom AI agents that handle customer service, internal operations, and data analysis for large organizations, with a focus on measurable ROI and seamless integration into existing workflows. While the company operates globally, its engineering and product teams are distributed, with a significant presence in Spain.

In Spain, InteractiveAI operates a technology hub in Madrid, which serves as a key development center for its AI platform. The company is known for a strong engineering culture, remote-friendly practices, and a product-led approach, making it an attractive destination for international engineers and developers looking to work on applied AI at scale. The Madrid office is a central part of the company's European operations, offering roles in engineering, DevOps, and full-stack development.

Industry
AI
Founded
2016
Employees
100–500
Headquarters
Madrid, Spain
All open roles at InteractiveAI
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