Postdoctoral Research Visit F/M Distributed Machine Learning at the Network Edge: Research Position

il y a 2 semaines


Technopole de Sophia Antipolis, France INRIA Temps plein

Job Context and Requirements

The position is part of the dAIEDGE project, a network of excellence for distributed, trustworthy, efficient, and scalable AI at the Edge, funded by the European Union.

The dAIEDGE Network of Excellence aims to strengthen and support the development of the dynamic European edge AI ecosystem under the umbrella of the European AI Lighthouse and to sustain the advanced research and innovation of distributed AI at the edge as essential digital, enabling, and emerging technology in an extensive range of industrial sectors.

The candidate will work with the NEO Inria team, consisting of Giovanni Neglia, Chuan Xu, and Frédéric Giroire.

Research Mission

The Internet was initially designed to enable computer resources' time-sharing, but it soon became the primary function to deliver content to end users. However, it is now called to play a new key role: to pervasively support machine learning (ML) operation both for model training and prediction serving.

There are two aspects calling for Internet-wide deployment of ML systems. First, data, one key ingredient of ML success, is often generated by users and devices at the edge of the network. The classic ML operation in the cloud requires such data to be collected at a single computing facility where training occurs. Data aggregation can be very costly, or simply impossible because of capacity constraints, privacy issues, or ownership ones. These scenarios call for distributed learning systems, where computation moves, at least in part, to the data. For example, Google's federated learning enables mobile phones, or other devices with limited computing capabilities, to collaboratively learn an ML model while keeping all training data locally. Distributed ML training is already a difficult task in a cluster setting. Indeed, optimization techniques, distributed systems, and ML models are a triad difficult to untangle: e.g., relaxed state consistency across computing nodes increases system throughput but may jeopardize convergence of the optimization algorithm or affect the final solution selected, leading to models with very different generalization capabilities.

Additional challenges arise when training moves to the Internet. First, the system potentially scales up to billions of devices, against at most thousands of GPUs to break ML training records in a cluster. Second, local datasets are highly heterogeneous with very different sizes and feature/label distributions. Third, devices may have very different hardware and connectivity. Fourth, communications are often unreliable (devices can be switched off at any time), slow (latencies are 2 orders of magnitude larger), and expensive for battery-constrained devices. Fifth, privacy concerns are often important and limit the operations that can be performed during training to avoid inadvertently disclosing sensible information. Finally, training is more vulnerable to malicious attacks. For all these reasons, federated learning (as ML training over the Internet is now usually called) has emerged in the last years as a specific research topic—well distinct for example from high-performance computing or cloud computing—at the intersection of machine learning, optimization, distributed systems, and networking.

Research Topics

We are looking for a postdoc candidate who could join our team to work on one or more of the following topics:

  • Distributed Inference
  • Online Learning Algorithms with Regret Guarantees
  • Distributed/Federated Learning
  • Machine Learning Privacy

Expected Activities

We expect the postdoc to actively participate to the activities of the EU project dAIEDGE (e.g., attending meetings, coordinating Inria contribution to deliverables).

The postdoc will also have the opportunity to collaborate with PhD students working on the topics listed above.

Required Skills

Candidates must hold a Ph.D. in Applied Mathematics, Computer Science, or a closely related discipline. Candidates must also show evidence of research productivity (e.g., papers, patents, presentations, etc.) at the highest level.

We prefer candidates who have strong mathematical background (on optimization, statistical learning, or privacy) and in general are keen on using mathematics to model real problems and get insights. The candidate should also be knowledgeable on machine learning and have good programming skills. Previous experiences with PyTorch or TensorFlow is a plus.

Benefits

  • Subsidized meals
  • Partial reimbursement of public transport costs
  • Leave: 7 weeks of annual leave + 10 extra days off due to RTT (statutory reduction in working hours) + possibility of exceptional leave (sick children, moving home, etc.)
  • Possibility of teleworking and flexible organization of working hours
  • Professional equipment available (videoconferencing, loan of computer equipment, etc.)
  • Social, cultural, and sports events and activities
  • Access to vocational training
  • Contribution to mutual insurance (subject to conditions)

Salary

Gross Salary: 2746 € per month



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