Senior Backend Engineer, Numan
Artificial Intelligence
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Digital healthcare partner
Job no longer available
Digital healthcare partner
201-500 employees
Job no longer available
+ Share options
201-500 employees
Company mission
Empowering people to live happier, healthier and longer lives.
Role
Who you are
- Is a strong backend engineer with experience in designing and developing large-scale applications and designing end-to-end infrastructure
- Demonstrates 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
- Is highly knowledgeable in technologies such as Retrieval-Augmented Generation (RAG)
- Has 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
- Has excellent Python skills and strong experience with frameworks such as Django or Flask
- Has strong commercial experience in relational and non-relational databases
- Has excellent problem-solving and debugging skills
- Cares deeply about system health and maintainability, with a passion for good engineering habits and best practices
- Takes initiatives, is able to work independently, and owns all aspects of their work
- Has solid communication skills and is able to work in cross-functional teams and collaborate effectively with remote team members
- Takes pride in their work and is always looking to improve, not settling for average
- Wants to work for a brand with a purpose
What the job involves
- We are seeking a talented Senior Backend Engineer to join our innovative AI team and help drive the future of digital health through the application of cutting-edge AI/ML solutions
- You will work closely with various teams across Product, Clinical, and Engineering, to develop and deploy machine learning models that enhance the quality and effectiveness of our health products and services
- Instrumental in designing our AI architecture and building a health platform that helps our patients take better care of themselves
- Setting up, fine-tuning, deploying, and scaling machine learning models that drive products and services
- Monitoring model performance in real-world applications and iteratively improving based on feedback and new data
- Working in the Medical Platform team, designing, implementing, maintaining, scaling and deploying a core part of our business
- Hands-on with coding, best practices, appropriate tools and technologies
- Mentoring, helping and guiding less experienced colleagues to grow as engineers
- Working with people from various business functions in clarifying requirements and suggesting different and relevant technical approaches
Our take
Numan is a digital health startup that was initially focused on treatments for men, offering a range of solutions for erectile dysfunction (ED) and hair loss, both themes related to male self-esteem that are often avoided and ignored.
The company has since expanded into areas like premature ejaculation and weight loss, alongside a comprehensive suite of diagnostic blood tests, live doctor consultations, and various personalised supplements. More recently, it has expanded its weight loss category into women's health, paving the way for a broader range of female treatment categories. In practice, Numan’s platform enables free online medical consultations, clinically proven treatments, diagnostics and personalised treatment plans.
And with solid funding, Numan is now working on further investments in technology and expansion of its operations. It's also made a number of key senior hires recently which will be sure to help enhance the company's product offerings and broaden its services to ultimately reach more customers.
Kirsty
Company Specialist at Welcome to the Jungle
Meet the team
40 people
Shivani Sharma-Savani, Senior Clinical Lead
Our mission
The clinical team champions safety at every step, guiding and supporting patients throughout their journey in Numan’s holistic healthcare programs.Insights
5% employee growth in 12 months
Company
Funding (last 2 of 4 rounds)
Jul 2025
$30m
SERIES B
Feb 2022
$20.1m
SERIES B
Total funding: $103m
Company 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
- Nursery benefit provided by YellowNest
- 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
- Season ticket loan
- Discount on Numan products for your friends and family
- Paid volunteering days
- An additional 2 weeks off once you reach your 5th anniversary with Numan
Company values
- Patients first
- Learn Fast
- Own the quality
- Succeed together
- Care deeply
Company HQ
Farringdon, London, UK
Leadership
Sokratis Papafloratos
(Founder & CEO)Technology entrepreneur of companies like Togethera.com and Trusted Places. Angel investor of companies like the popular meditation app Calm, which in 2019 became the world’s first mental health unicorn.
Diversity, Equity & Inclusion at Numan
- Diversity at Numan At Numan, people are at the heart of who we are. We recognise and value the unique perspectives and experiences that individuals from all backgrounds bring.
- We promote innovation and creativity, enabling us to tackle things from various viewpoints and are committed to equal opportunities and continuously strive to create a workplace where everyone feels respected, heard, and valued.
- Embracing diversity isn't just our goal; it's our strength, driving us towards a more inclusive future.
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