We're looking for a Senior Machine Learning Engineer to join our Search and Recommendations team, where we're building the next generation of AI-powered fashion experiences at ASOS.
Our mission is to help millions of customers discover complete outfits that reflect their personal style, preferences and the latest fashion trends. Sitting within ASOS's Search & Discovery organisation, the team combines recommendation systems, personalisation, deep learning and emerging AI technologies to create new ways for customers to discover fashion beyond traditional ecommerce experiences.
You'll work on large-scale machine learning systems powering personalised outfit recommendations, style discovery and intelligent product experiences across the customer journey. From recommendation and retrieval systems to deep learning and generative AI applications, you'll help bring innovative ideas into production and deliver experiences used by millions of customers.
Working alongside Machine Learning Scientists, Software Engineers and Product Managers, you'll play a key role in designing, building and operating production ML systems at scale. You'll tackle challenging problems across recommendation systems, personalisation, deep learning and AI-powered outfit generation, helping shape the future of machine learning at ASOS.
What you’ll be doing:
Design, build and operate production machine learning systems that power outfit discovery and personalised fashion experiences.
Partner with Machine Learning Scientists to deploy deep learning models and deliver meaningful customer and business outcomes.
Deploy and optimise batch and real-time machine learning models serving millions of customers.
Contribute to systems that power recommendations, personalisation and AI-driven fashion discovery experiences across ASOS.
Improve system performance, reliability, observability and scalability across the machine learning lifecycle.
Contribute to technical design decisions, architecture discussions and engineering best practices.
Mentor and support other engineers through coaching, collaboration and knowledge sharing.
Help strengthen technical practices across the team and the wider machine learning community at ASOS.
Contribute to the development of shared machine learning capabilities, tools and best practices used across multiple teams.
/01 Company Description
We’re ASOS, the online retailer for fashion lovers all around the world.
We exist to give our customers the confidence to be whoever they want to be, and that goes for our people too. At ASOS, you’re free to be your true self without judgement, and channel your creativity into a platform used by millions.
But how are we showing up? We’re proud members of Inclusive Companies, are Disability Confident Committed and have signed the Business in the Community Race at Work Charter and we placed 8th in the Inclusive Top 50 Companies Employer list.
Everyone needs some help showing up as their best self. Let our Talent team know if you need any adjustments throughout the process in whatever way works best for you.
/02 Job Qualifications
About You
We're interested in candidates who bring experience in several of the following areas. We recognise that skills and expertise can be developed through a variety of experiences and career paths.
Experience designing, building and deploying machine learning systems in production environments.
Strong understanding of machine learning engineering principles and modern software engineering practices.
Hands-on experience with deep learning frameworks such as PyTorch, TensorFlow or similar.
Experience training and optimising models using large datasets and distributed compute infrastructure.
Experience working with recommendation systems, ranking, retrieval, personalisation or related machine learning domains.
Knowledge of MLOps practices, including model deployment, monitoring and lifecycle management.
Experience building reliable, observable and scalable services in cloud environments.
Comfortable providing technical leadership and mentoring other engineers.
Strong collaboration and communication skills, with experience working in cross-functional product teams.
Curiosity about emerging AI technologies and the practical application of LLMs and generative AI in customer-facing products.
/03 Additional Info
BeneFITS’
Employee discount (hello ASOS discount!)
Employee sample sales
25 days paid annual leave + an extra celebration day for a special moment
Discretionary bonus scheme
Private medical care scheme
Flexible benefits allowance - which you can choose to take as extra cash, or use towards other benefits
Opportunity for personalised learning and in-the-moment experiences that enable you to thrive and excel in your role
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The Work
Make bold moves with strong backing and serious support.
Tech enables our current success as much as our future growth, that's why our tech stack is seriously impressive. If you've got a great idea, we'll help you run with it. Our people are our greatest asset and we're always looking for new challengers who want to help us grow.
The Potential
Boost your skills and accelerate your ambitions.
If you get a buzz out of learning new things every day, you'll love it here. We give everyone the freedom, time and investment to discover what's possible - and explore where we might go next. How far you want to take your career is up to you.
The Culture
Feel encouraged, empowered and heard as part of our expert team.
Join us and you'll be part of a supportive, fun and friendly team of progressive thinkers, listeners and doers – all working together to solve some of the most exciting and complex tech challenges.
The Prospects
Harness extraordinary opportunity at pace and at scale.
We're just getting started with our global ambitions. Our tech team are at the heart of it all, seizing opportunities and making disruptive breakthroughs that have a real business impact in an industry leading way. We already know who we want to become. Do you?
Team Culture
As A Team We Never Sit Still
We always have to move fast. And we rise to the challenges that come with being such a fast-growing business. After all, we wouldn’t be where we are today if we did things the same as everyone else.
Our Tech Training @ ASOS
Whatever experience you have, there’s always a chance to grow and develop your skills further at ASOS.
What’s It Like To Be An Engineer @ ASOS?
From our great opportunities to even greater teams, find out why becoming an engineer at ASOS could be your perfect career move.
what our people say
what our people say
what our people say
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what our people say
what our people say
what our people say
what our people say
what our people say
what our people say
what our people say
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Zijiao Li
Tech @ASOS
I love working at ASOS in my team because of the great atmosphere. From day one I already felt like being part of the team, everyone is so friendly, approachable and willing to help. It’s the place where you feel trusted and are given the opportunities & time to explore your full potential. As someone who just relocated to London, I also appreciate the international and cultural diverse environment – it’s ok to be whoever you want to be!
Amy Richardson
Tech @ASOS
As a software engineer with a love for fashion, I feel extremely lucky to be part of a fashion company that priorities technology, innovation and customer experience to the same degree as their clothing.
Si Jobling
Tech @ASOS
As someone who left ASOS after 7 years but came back, it speaks volumes how much I love working at ASOS. The obvious reason is the people, not just in Tech but beyond. There's an unspoken respect and authenticity between everyone who works here
Zijiao Li
Tech @ASOS
I love working at ASOS in my team because of the great atmosphere. From day one I already felt like being part of the team, everyone is so friendly, approachable and willing to help. It’s the place where you feel trusted and are given the opportunities & time to explore your full potential. As someone who just relocated to London, I also appreciate the international and cultural diverse environment – it’s ok to be whoever you want to be!
Amy Richardson
Tech @ASOS
As a software engineer with a love for fashion, I feel extremely lucky to be part of a fashion company that priorities technology, innovation and customer experience to the same degree as their clothing.
Si Jobling
Tech @ASOS
As someone who left ASOS after 7 years but came back, it speaks volumes how much I love working at ASOS. The obvious reason is the people, not just in Tech but beyond. There's an unspoken respect and authenticity between everyone who works here
Zijiao Li
Tech @ASOS
I love working at ASOS in my team because of the great atmosphere. From day one I already felt like being part of the team, everyone is so friendly, approachable and willing to help. It’s the place where you feel trusted and are given the opportunities & time to explore your full potential. As someone who just relocated to London, I also appreciate the international and cultural diverse environment – it’s ok to be whoever you want to be!
Amy Richardson
Tech @ASOS
As a software engineer with a love for fashion, I feel extremely lucky to be part of a fashion company that priorities technology, innovation and customer experience to the same degree as their clothing.
Si Jobling
Tech @ASOS
As someone who left ASOS after 7 years but came back, it speaks volumes how much I love working at ASOS. The obvious reason is the people, not just in Tech but beyond. There's an unspoken respect and authenticity between everyone who works here
what our people say
what our people say
what our people say
what our people say
what our people say
what our people say
what our people say
what our people say
what our people say
what our people say
what our people say
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EXTRAS
Benefits
We’re big on rewarding our ASOSers from day one. Benefits are great when you can flex them! That’s why we offer a wide choice of benefits focused on health, wealth, and your inner self – so you can personalise your reward package in a way that’s best for you. Here’s a taster of what you can get.
Employee Discount
The most asked-about benefit! As an ASOSer, you’ll receive an exclusive employee discount. You can also nominate a family member or friend to share your discount with.
Pension
Retirement might not be on your mind right now, but it’s important to prep for it. We offer matched contributions up to 5% to help you save.
Private Medical Care scheme
If you join our Private Medical Care scheme, you’ll get fast and effective access to medical cover.
Bonus
What we achieve is always a team effort. That’s why we offer a discretionary bonus scheme which rewards you based on our group financial and strategic performance.
Celebratory Day!
Get an extra day off in addition to the 25 days of annual leave you get! Spend it celebrating the big days in life, whether it’s birthdays, cultural holidays, weddings and anything else.
Shuttlebus Service (if you're based in our Leavesden office)
It’s more of a work perk, but we offer a free shuttlebus between Watford station and our office in Leavesden.
Sample Sales
We’ve always got fun things happening in our offices, but the one ASOSers get most excited about is our sample sales. Plus, all proceeds from the sample sale get donated to the ASOS Foundation, which helps our charity partners abroad.
Career Development
You’ll have the opportunity for personalised learning and in-the-moment experiences to create a dynamic and agile learning environment that empowers you to thrive and excel in your role.
Summer Hours
We finish at 3pm on Fridays in June, July and August!! This perk doesn’t mean a dip in your salary – it just gives you extra freedom to enjoy those summer weekends however you want.
Location
Our HQ in London
Our HQ in Camden was once a cigarette factory – now, the iconic Art Deco building has been completely renovated with spacious office areas, ASOS Studios (where we shoot all our products), beauty rooms and a free gym. There’s also a subsidised canteen and café.