Oseh Mathias
  1. present

    River

    Founder and CEO

    Developing a chronic brain-computer interface that decodes language and movement without damaging the brain. We are working with the FDA, the TGA, and some of the most talented scientists and engineers in the world.

  2. 2025

    Duo AI

    Founder and CEO

    Duo began as a globally-replicated, low-latency graph memory layer for voice agents, then expanded into a full-service voice AI platform used by every global real-estate conglomerate. Backed by Startmate (S25), NZVC, and prominent angels. Partnered with NVIDIA.

  3. 2024

    Superfeel

    Founding Engineer

    Superfeel was a voice AI startup founded by Google DeepMind researchers, before there were APIs you could use to synthesize realistic-sounding voices. I spent much of my time building and training voice AI models from papers out of Google's lab, using work from AudioLM, SoundStorm, and others as a foundation. I also designed the data-gathering and processing pipelines, along with an app for easy enrollment. Highlights include creating an interactive audiobook for Rick Rubin and a digital twin for Billie Eilish to scale her fan engagement.

  4. 2023

    SpeechFit

    Founder

    SpeechFit replaces the paper forms clinicians use to track stuttering-therapy progress with an app supporting programs like Lidcombe and Camperdown. It is used by thousands of families across 23 countries, and I have presented it to universities and clinics in Australia, Canada, Iran, the UK, the US, and New Zealand.

  5. 2022

    Crypto Tax Calculator

    Founder

    Built a tool that pulled live and historical prices for 10,000 coins and used your location and income to compute the capital gains tax owed. I monetised it with affiliate links to the major crypto tax platforms, and once I began outranking the platform whose affiliate program was my revenue, the acquisition offers arrived. I sold it.

  6. 2021

    Pylon

    Founding Engineer

    I built the product behind 65% of Australia's residential rooftop solar installations, voted the country's #1 solar software several years running. It calculates a roof's solar yield from aerial imagery, using computer vision and the sun's azimuth to model shading from nearby obstacles, then lets installers lay panels onto the roof, generate a bill of materials, and quote the job.

  7. 2020

    Zeptron AI

    Founder

    When COVID shut the cities, I spent three months in the mountains learning AI, then built Zeptron, which tracked building occupancy in real time using YOLOv3 over existing CCTV, with Raspberry Pi camera units for sites that had none. It was deployed at Stone & Chalk and other office buildings across Sydney and Melbourne.

  8. 2019

    Bookwell

    Bookwell was a salon-booking marketplace built by the founders of Menulog. I worked across product, engineering, and growth until its sale to Fresha.

  9. 2017

    Roche

    Operator in the oncology unit, responsible for the Tecentriq (atezolizumab) launch in Australia and New Zealand. I also worked on Alecensa (alectinib) and Avastin (bevacizumab).

  10. 2016

    MedRecruit

    Principal Engineer

    Principal engineer and operator at the largest medical-recruitment company in the Asia-Pacific region. With founder Sam Hazledine, I led an effort to revise the Hippocratic oath to put doctors' own wellbeing first.

  11. 2014 to 2016

    Startup Weekend

    Mentor, Organiser

    Organised Startup Weekends across New Zealand, and served as a mentor in 2016.

  12. 2015

    TEDxDunedin

    License Holder, Lead

    I held the TEDx license for Dunedin and led a team of 30 volunteers to deliver a sold-out event, securing sponsors, training the speakers, and streaming it online to thousands of people.

  13. 2014

    Timely

    Early

    Timely is an appointment-booking platform. I was employee number seven, chose equity over cash, and watched it grow to 150 people and exit to EverCommerce.

  14. 2014

    Gigatown

    NZ Government Lobbyist

    Leveraging my relationship with Chorus, I kickstarted and led the campaign for Dunedin in Chorus's Gigatown competition, lobbying government and engaging community to win the fastest internet in the Southern Hemisphere at 1 Gbps. At the time, this was unheard of anywhere outside California.

  15. 2013

    NZ Entrepreneurs

    Founder and CEO

    After seeing Posse founder Rebekah Campbell interviewed on the evening news, I wanted an excuse to talk to her. I registered the NZ Entrepreneurs domain that night, emailed her, and landed an interview within the week to ask all my silly questions. It began a long series of interviews including Rod Drury (several times), Vaughan Rowsell, Morgo founder Jenny Morel, and nearly every other founder in New Zealand. We sold ad space to Chorus within five months of launch, and eventually sold the magazine as a cash-generating asset.