Mathias Bæk Tejs Knudsen

Danish computer scientist, entrepreneur and algorithm researcher. Represented Denmark at the International Mathematical Olympiad in 2009 (silver, 25 pts) and 2010 (gold, 31 pts, top-13 worldwide), and won a bronze (2009) and silver (2010) at the International Olympiad in Informatics. Holds a PhD in algorithms from the University of Copenhagen, where his research on hashing, similarity sketching and spanners earned the 2018 University of Copenhagen Science 'Best PhD' prize. Co-founded SupWiz, a Danish AI customer-service company, where he was CTO; SupWiz raised ~$2.87M across several rounds and partnered with NNIT. Later runs Mathias Tejs Solutions ApS and works as a system developer at NES TECH A/S.

Signal

Little public social posting under his own name; his visible footprint is academic (Google Scholar, arXiv/DL papers), competitive-programming (Codeforces/cphof), and company-side (SupWiz, LinkedIn). Public activity skews toward research output and startup milestones rather than a personal social feed.

Notes10

• Won silver at IMO 2009 (25 pts, rank 117) and gold at IMO 2010 (31 pts, rank 13, 97.7th percentile, nearly a perfect paper with 7/7 on P2, P5, P6) for Denmark; the two-year arc from mid-team silver to a near-perfect gold marks him as Denmark's strongest young mathematician of that cohort.Jul 1, 2010
• Co-founded SupWiz (2016), a Danish AI customer-service/chatbot company, alongside professor Stephen Alstrup (CEO) and Søren Dahlgaard; served as CTO and later 'Co-Founder and Fellow'.
• Won the 2018 University of Copenhagen (Science) Best PhD prize, announced by his PhD advisor Stephen Alstrup - a signal that his doctoral work was regarded as top-tier within the department, which is also where he then co-founded a company with his advisor.Nov 30, 2018
• SupWiz partnered with Danish IT services firm NNIT in September 2017 to build next-generation AI customer-service software - NNIT's CTO called the SupWiz team 'some of the world's leading university researchers in algorithms', framing the startup's edge as research depth.Sep 11, 2017
• Also competed at the International Olympiad in Informatics, taking bronze in 2009 and silver in 2010 - a rare double-medalist across both the math and informatics olympiads, which is the early signal of an algorithms specialist rather than a pure mathematician.Aug 1, 2010
• Currently a Systemudvikler (systems developer) at NES TECH A/S in Copenhagen and still affiliated with SupWiz as a Fellow - the LinkedIn headline reads 'Entrepreneur, Innovator, AI Specialist, and PhD', a self-description that leans on research identity rather than a single operating role.
• PhD in algorithms from the University of Copenhagen (Københavns Universitet).
• SupWiz raised roughly $2.87M across six rounds (seed plus a grant/prize round), according to Tracxn - a modest early-stage raise for an AI company that leaned on research credentials rather than a large venture round.
• Research focus spans hashing, similarity estimation/sketching and graph spanners, with papers at top venues (ICALP, FOCS, PODS, SIAM J. Computing); Google Scholar shows ~545 citations and an h-index of 13, concentrated on practical hash functions.
• Named on the paper 'Fast Similarity Sketching' (FOCS 2017) with collaborators including Mikkel Thorup and Søren Dahlgaard - the coauthorship graph doubles as his SupWiz founding network.Apr 1, 2017
• Founded and runs Mathias Tejs Solutions ApS as Managing Director, an IT/software consulting vehicle; Danish company records show him directing multiple holding companies (MBTK af 2017 ApS, MBTK af 2020 ApS, Edberiet ApS).
• Uses the surname 'Langhede' in addition to 'Knudsen' (as Mathias Baek Tejs Langhede) on LinkedIn and Danish business registries - useful when searching Danish corporate and public records, where the compound name is the primary handle.