PhD Research Scientist Intern - Edge AI in London

Our global HQ is in Sydney, Australia, but our London campus sits in Hoxton Square, right in the middle of Shoreditch. It's a space where our UK team comes together to connect, create and collaborate. This role is based in London, and we're looking for someone who calls it home. Our hybrid way of working gives you flexibility — you'll have the option to work from home as well as connecting and collaborating with your team in-person, on campus.

At Canva, our mission is to empower the world to design. We're building AI that feels magical and lands real impact for millions of people, helping anyone create with confidence. We're looking for a research intern who is excited by efficient ML and edge deployment to help us bring video-capable vision-language models onto the devices in people's pockets.

We're the Video Storytelling team, working on the models and systems behind Canva's video AI experiences. We partner closely with our Edge AI group, who are building Canva's on-device inference capability, to explore what's possible when AI runs directly on users' own hardware.

This is a 14-week research internship focuses on one clear question: can a video-capable vision-language model be optimised to run efficiently on high-traffic consumer phones, while retaining enough capability to serve a real product use case? The use case is intelligent captioning, where the model's visual understanding of a video drives context-aware, intelligently placed captions.

You'll own the complete arc, from model selection through optimisation, deployment, and measurement, delivering a working on-device prototype plus a benchmarked map of what current consumer hardware can and can't do. You'll inherit mature data and pipelines from our work, so you can benchmark directly against a strong reference rather than building from scratch. You'll be supported by supervisors with deep on-device AI backgrounds, weekly 1:1s, and collaborators across teams.

What you'll do:

• Survey candidate video-capable VLMs (e.g. Gemma, Qwen-VL, SmolVLM, MiniCPM-V) and determine the best starting point.
• Apply model optimization techniques and architecture improvements to specialize vision-language models for on-device deployment, including quantization, pruning, distillation, hardware-specific compilation, and task-specific fine-tuning for caption placement.
• Deploy the model on real, high-traffic mobile hardware through our on-device inference library, iterating the optimisation-deployment loop against real on-device measurements.
• Run comparative evaluation against at least one alternative optimisation path, and human evaluation against our server-side captions quality bar.
• Document your findings clearly enough that the team can act on them, mapping which workloads are viable on-device today and which aren't yet, and why.
• Compile your output into a patent filing and a paper publication.

You're likely a match if you have:

• Strong Python and hands-on PyTorch experience, including training and fine-tuning vision-language models.
• A solid understanding of modern vision-language and multimodal architectures, with the ability to pick up a recent paper and reproduce it.
• Experience with optimisation methods like quantisation, pruning, or distillation, and a clear sense of what each costs you in accuracy.
• Experience deploying models on-device or at the edge with runtimes like Core ML, LiteRT/TFLite, ONNX Runtime, or ExecuTorch, working within real memory and latency budgets.
• Experience running your own research project end to end: making a plan, measuring carefully, and iterating on what you find.
• Current enrolment in a PhD in ML, CS, or a related field, with first-author papers at venues like CVPR, NeurIPS, ICCV/ECCV, ICLR, or ICML.

Nice to have:

• Experience with video understanding models, ideally the token-efficient kind.
• Publications or open-source contributions in efficient ML, multimodal models, or edge AI.
• Experience writing custom kernels for inference optimisation.
• Experience deploying models across different on-device hardware accelerators (e.g. Apple Neural Engine, DSPs).
• Experience working across research and product teams, in industry or on a previous internship.

Additional Information:

We make hiring decisions based on your experience, skills and passion, as well as how you can enhance Canva and our culture. When you apply, please tell us the pronouns you use and any reasonable adjustments you may need during the interview process. We celebrate all types of skills and backgrounds at Canva so even if you don’t feel like your skills quite match what’s listed above - we still want to hear from you! Please note that interviews are conducted virtually.