About Me

DrJosiahChavulaI am a Lecturer in the Computer Science Department of the University of Cape Town (UCT). I am also a member of UCT’s ICT4D Center, collaborating particularly within the Net4D research group.

Research area: My research focuses on performance of Internet systems in low-resource contexts, with emphasis on (1) User-centric QoS/QoE measurements;  (2) Internet universality in Africa and other developing regions, particularly with respect to ‘constrained access’ and various forms of  Internet traffic manipulation and censorship; (3) Design of logical topologies for high performance, such as in Research and Education Networks (NRENs) and in Community Networks (including studying the impact of interconnection/routing strategies and middle-boxes on end-to-end performance); (4)  Data-driven network performance engineering using Machine Learning and Software Defined Networking; and (5) Exploring the intersection between internet performance and security, privacy and censorship.

Prospective postgraduate students can contact me on jchavula_at_cs_dot_uct_dot_ac_za to discuss potential research projects and possible funding avenues.

The goal of my research is to build community-orientated capacity for collecting and evaluating Internet-related data that can be used to identify technical challenges pertaining to Internet access, and to help network operators improve their inter-network topologies. My approach involves interaction with real-world network deployments for measurements and data collection. I also focus on designing, building and testing of Internet measurement tools.

I obtained a PhD in Computer Science from the University of Cape Town (2017), an MSc in Networking and Internet Systems from Lancaster University, England (2011), and a BSc in Computer Science and Physics from the University of Malawi (2005). I have previously been a Senior Research Engineer at the African Network Information Center (AFRINIC), the Regional Registry for Internet Number Resources serving the African Internet Community.