Senior AI/ML Engineer

Company: 3Pillar
Apply for the Senior AI/ML Engineer
Location: London
Job Description:

Embark on an exciting journey into the realm of software development with 3Pillar! We extend an invitation for you to join our team and gear up for a thrilling adventure.

Key Responsibilities

  • Lead a team of AI/ML engineers, providing technical guidance, mentorship, and support.
  • Collaborate directly with client teams to understand business problems, explain technical solutions clearly, and lead the implementation of AI/ML features while representing 3Pillar’s technical excellence.
  • Lead technical execution of AI/ML projects from experimentation to production.
  • Translate business problems into AI/ML solutions and manage solution delivery.
  • Guide team members on model selection, evaluation, fine-tuning, and Gen AI usage.
  • Collaborate with product, data engineering, and software teams for integrated delivery.
  • Conduct code reviews, ensure best practices, and contribute to model deployment pipelines.
  • Maintain documentation and model governance as per responsible AI standards.
  • Define project goals, scope, and deliverables in collaboration with stakeholders.
  • Create scalable architecture and robust machine learning systems that meet business objectives of a software product.
  • Collaborate with cross-functional teams to integrate machine learning solutions into existing products and workflows.
  • Establish best practices and standards for machine learning development within the organization.
  • Monitor and evaluate the performance of machine learning models in production and implement improvements as needed.
  • Stay updated on industry trends and advancements in machine learning technologies.
  • Implement, deploy, optimize AI/ML algorithms and models into production environments.
  • Conduct experiments, perform data analysis, and present findings to stakeholders.

Minimum Qualifications

  • Bachelor’s degree in Computer Science, Engineering, Mathematics, or a related field; a Master’s degree is preferred.
  • 8+ years of experience in building AI models with ML, NLP and deep learning.
  • Proven track record of successfully delivering machine learning projects from concept to production.
  • Strong leadership, interpersonal skills, and ability to effectively communicate technical concepts to non-technical stakeholders.
  • Excellent problem-solving abilities and attention to detail.
  • Strong knowledge of AI/ML techniques, algorithms, and frameworks. Experience building and deploying ML models (classification, NLP, forecasting).
  • Experience with cloud platforms such as AWS, Azure, or Google Cloud.
  • Strong programming skills in Python, and familiarity with libraries such as PyTorch, TensorFlow, and Scikit-Learn.
  • Exposure to Matplotlib, Seaborn, or Plotly.
  • Solid understanding of machine learning concepts, algorithms, and statistical methods.
  • Experience with computer vision libraries (OpenCV, etc.) and NLP libraries (spaCy, Hugging Face, etc.).
  • Knowledge of MLOps practices and experience with CI/CD tools.
  • Good understanding of using LLMs via APIs or fine-tuning open-source models.
  • Hands‑on with data prep (Pandas, Spark), feature engineering, model training and tuning.
  • Knowledge of vector stores, embeddings, and LLMOps tools (LangChain, LlamaIndex, etc.).
  • Experience with at least one cloud platform and CI/CD for ML (GitHub Actions, MLflow, etc.).
  • Exposure to monitoring frameworks (evidently.ai, whylogs, or custom dashboards).
  • Proven ability to work independently and with a team.
  • Extensive expertise in refining LLMs, implementing RAG architectures, Weaviate vector databases, and advanced prompt engineering.

Additional Experience Desired

  • Led teams building GenAI, LLM, or agentic AI applications.
  • Experience building reusable AI frameworks or platforms.
  • Experience with vector databases (FAISS, Pinecone), RAG, Hugging Face.
  • Contributions to research papers, blogs, or open-source projects.

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Posted: July 7th, 2026