Lead Machine Learning Engineer (A.I)

Zaizi Ltd; Greater London; Hybrid; GBP 70,000 - 120,000; Full time

Benefits offered by this job

Holiday days

Health insurance

Learning budget

Flexible work

Pension

Life assurance

Away days

Free lunches

Social events

Fruit & coffee

Cyclescheme

Job summary

Zaizi Ltd is seeking a Machine Learning Engineer to research, develop, and test new AI models for public sector applications in the UK. The role focuses on building complex models, designing robust MLOps pipelines, monitoring deployments, and retraining models to maintain performance and safety.

You will mentor juniors, influence architectural decisions, and tackle non-routine ML challenges across production systems, with a focus on scalable and secure AI solutions.

Qualifications

• Expert in generative AI research.
• Experience delivering production ML models in a UK public sector context.

Responsibilities

• Model Development & Delivery: design, build, test, deploy ML models for production.
• MLOps Pipeline Management: CI/CD, monitoring, retraining.
• Advanced Problem Solving for complex ML challenges.
• Maintain and retrain existing models; ensure safety and performance.

Skills

ML

Research

Python

CI/CD

MLOps

Model deployment

Tools

Keras/TensorFlow/PyTorch

CI/CD pipelines

Job description

• Work on exciting public sector projects and make a positive difference in people’s lives. At Zaizi, we thrive on solving complex challenges through creative thinking and the latest tools and tech
• As a Machine Learning Engineer,AI, you’ll be responsible for researching, developing, and testing new AI algorithms, models, and technologies that businesses can use to automate tasks and gain insights from their data
• Key responsibilities include building complex models, designing and managing MLOps pipelines for CI/CD, monitoring, and model retraining. Mentoring junior members, influencing technical decisions within the team, and handling complex, non-routine problems
• Our work culture is inclusive, modern, friendly, and democratic. We look for bright, positive-thinking individuals with a can-do attitude. Our people enjoy challenging themselves to be the best at what they do – if that sounds like you, you’ll fit right in!
• These are the expected objectives for this role. We are happy to discuss this further during the interview process with the successful candidate
• Model Development & Delivery: Design, build, test, and deploy complex machine learning models, ensuring high standards of quality, performance, and scalabilityDecide what model is most suitable for use in products and services
• MLOps Pipeline Management: Design and manage robust MLOps pipelines, including continuous integration/continuous delivery (CI/CD), monitoring, and model retraining, to ensure efficient and reliable model deployment and operation
• Advanced Problem Solving: Act as a technical expert for complex, non-routine technical challenges within machine learning, developing and implementing innovative and effective solutions
• Customise, optimise, re-train and maintain existing models
• Deploy models into production, testing and assuring them to ensure they meet performance requirements
• Work with others to integrate models with existing systems
• Check that models used in live products and services stay safe, secure and continue to work effectively

Benefits

• 25 days paid holiday, plus bank holidays
• Vitality Health Insurance
• £500 budget on learning and development
• Flexible working
• Workplace Pension
• Group Life Assurance
• Team building away days
• Takeaway free lunches
• Regular social activities
• Free fruit and coffee in the office Cyclescheme

Research. Plans and directs and carries out research activities, acting as a subject matter expert in generative AI researchPrototyping. Delivers complex, high-risk proofs of concept that test new AI applicationsData Science. Applies a range of data science techniques to support model developmentSpecialist Advice. Serves as the primary source of expertise for generative AI within the organizationProven experience in building, deploying, and managing complex machine learning modelsBroad technical expertise in machine learning, demonstrating a deep understanding of various ML algorithms, frameworks, and best practicesEmerging Technology Monitoring. Systematically discovers and evaluates new generative AI technologies for business relevance, feasibility and relevance within the National Security DomainZaizi works with UK Central Government departments on a range of projects. To be able to work on our customer projects, employees must be Security Cleared to a standard acceptable to our Government customers. Due to this restriction we can currently only recruit candidates who have the right to work in the UK without sponsorship and who have lived in the UK for the last 5+ years continuously