Joseph Sefara
Senior Data Science Specialist
Pretoria, Gauteng, South Africa
Summary
👤
Senior🎓
Top SchoolJoseph Sefara is a Senior Data Science Specialist with a decade of experience building and deploying machine learning and deep learning systems across cloud platforms (AWS, GCP, Azure) and large-scale production environments. At CSIR he applies advanced analytics—from supervised regression and classification to unsupervised big-data techniques—and pairs statistical rigor with software engineering to operationalize models with appropriate hardware and latency constraints. He is the founder of SpeechTech SA, where he focuses on speech synthesis and recognition, reflecting a strong research interest that complements his publication and student-supervision background. Technically fluent in Python, TensorFlow/Keras, Gensim, NLP toolkits and visualization stacks, he also leverages SAS, SPSS and R for robust analysis. A former university tutor with an MSc in Computer Science, he combines academic depth with practical product delivery and a commitment to community impact. Colleagues describe him as a diligent self-starter and avid networker who enjoys tackling hard problems and mentoring the next generation of data practitioners.
10 years of coding experience
6 years of employment as a software developer
Master of Science - MS, Computer Science, Master of Science - MS, Computer Science at University of Limpopo
English, Sotho
Github Skills (49)
data-repository10
gensim10
synonym10
health10
sentence10
word2vec10
doh10
doi10
word-embeddings10
fasttext10
wordnet10
natural-language-processing10
nlp10
sentence-similarity10
glove10
Programming languages (6)
Github contributions (5)
dsfsi/textaugment
May 2019 - May 2022
TextAugment: Text Augmentation Library
Contributions:7 releases, 6 reviews, 46 commits in 3 years
word-embeddingsword2vecnatural-language-processingmixupnlp-augmentation
JosephSefara/AfricanWordNet
Nov 2020 - Mar 2021
Contributions:1 release, 17 commits, 9 pushes in 4 months
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