Mateusz Soja

I’m Product Experience Manager at Lemonlight, where I design and prototype features for Hero Video, a platform brands and production teams use to make videos with AI.

I co-founded Cappit, a subscription platform for sports content creators. I’ve also led design at UNUM and Strike Social.

Find me on LinkedIn, or email me at [email protected].

  • Hero Video platform

    Lemonlight’s video platform, where brands and production teams make videos and generate new ones with AI. I design and prototype features with vibe coding, test them with users, and ship the ones that work.

    2025 – now

  • UNUM app

    An app that helps creators and social media managers plan, design, and schedule their posts. They can see how their feed will look before they post, and manage several accounts in one place. I designed new features for the app and led the design team.

    2019 – 2024

  • ScoresJungle app

    A mobile app and a web platform for fishing tournaments. Organizers run events on the web. Players join and track scores in the app, even without internet. I designed both.

    2023 – 2024

  • Cappit platform · Co-founder

    A subscription platform where sports handicappers and daily fantasy sports (DFS) experts sell their content. We launched in three months and reached about 200 paid subscriptions.

    2022 – 2023

  • Halsang app

    A mobile app and a web platform for managing a manufacturer’s gates, turnstiles, and fencing. I designed both, working directly with the client.

    2022 – 2023

  • HelpEar app

    A platform for Deaf professional drivers who travel across the EU. I designed the whole interface for the beta, working directly with the client, and ran usability tests with Deaf drivers.

    2022

  • Strike Social platform

    A self-service platform for running video ads on social media. Marketers manage many campaigns in one place. I designed the whole interface, ran usability tests, and later led the design team.

    2016 – 2019

  • TrueView advertising platform

    Strike Social’s tool for tracking audience activity on YouTube. Its Strike Predict feature forecasts organic views so marketers know where to advertise. I designed the dashboards and reports.

    2014 – 2016

  • Product Experience Manager

    Lemonlight

    2025 – now

  • Senior Product Designer

    Lemonlight

    2024 – 2025

  • Lead Product Designer

    UNUM

    2019 – 2024

  • Product Designer

    Strix

    2019

  • Lead Product Designer, Product Owner

    Strike Social

    2014 – 2019

  • UI/UX Designer

    edrone

    2014

  • UI/UX Designer, Graphic Designer

    Freelance

    2010 – 2014