Senior Backend Engineer

Summary

Join Numan's innovative AI team as a Senior Backend Engineer and contribute to the future of digital health. You will play a key role in designing AI architecture, building a health platform, deploying machine learning models, and ensuring optimal model performance. Collaborate with cross-functional teams, mentor junior engineers, and contribute to a company with a strong mission. This role requires expertise in backend engineering, large language models, and AI functionalities. Numan offers a comprehensive benefits package including share options, generous holiday time, health insurance, enhanced parental leave, and various other perks.

Requirements

• Be a strong backend engineer with experience in designing and developing large-scale applications and designing end-to-end infrastructure
• Demonstrate expert-level understanding of deploying and managing Large Language Models (LLMs), including setting up, fine-tuning, and scaling these models to support real-world applications
• Be highly knowledgeable in technologies such as Retrieval-Augmented Generation (RAG)
• Have substantial experience building, optimising, and maintaining APIs specifically designed for AI functionalities, including a scalable AI model inference with robust error handling and security measures
• Have excellent Python skills and strong experience with frameworks such as Django or Flask
• Have strong commercial experience in relational and non-relational databases
• Have excellent problem-solving and debugging skills
• Care deeply about system health and maintainability, with a passion for good engineering habits and best practices
• Take initiatives, be able to work independently, and own all aspects of their work
• Have solid communication skills and be able to work in cross-functional teams and collaborate effectively with remote team members
• Take pride in their work and always be looking to improve, not settling for average
• Want to work for a brand with a purpose

Responsibilities

• Be instrumental in designing our AI architecture and building a health platform that helps our patients take better care of themselves
• Set up, fine-tune, deploy, and scale machine learning models that drive products and services
• Monitor model performance in real-world applications and iteratively improve based on feedback and new data
• Work in the Medical Platform team, designing, implementing, maintaining, scaling and deploying a core part of our business
• Be hands-on with coding, best practices, appropriate tools and technologies
• Mentor, help and guide less experienced colleagues to grow as engineers
• Work with people from various business functions in clarifying requirements and suggesting different and relevant technical approaches

Benefits

• Share options
• 25 days holiday, plus bank holidays (increasing to 30 the longer you stay with Numan)
• Health insurance with Vitality
• Enhanced maternity and parental leave
• Employee assistance programme (access to therapy, financial planning and discounts)
• Generous pension (includes both employee and employer contributions)
• Flexible working options, including a dog friendly office in Farringdon
• Personal training and development budget via Learnerbly
• Wellhub membership, giving you access to over 2,000 locations in the UK
• Free office snacks including breakfast items, soft drinks, tea and coffee
• Cycle to work scheme
• Discount to Numan products for your friends and family
• Paid volunteering days
• An additional 2 weeks off once you reach your 5th anniversary with Numan