Mateusz Soja

Product designer, building with AI. I like turning messy workflows into simple products, currently Product Experience Manager at Lemonlight, working on Hero AI Video.

Projects

2025 – now
Hero Video AI platform
Lemonlight’s platform for making videos. Brands and production teams use it to produce videos and to 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
2019 – 2024
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
2023 – 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
2022 – 2023
Cappit platform · Co-Founder
A subscription platform for sports content, built for cappers and DFS experts. Creators first. We launched in three months and reached about 200 paid subscriptions.
2022 – 2023
2022 – 2023
Halsang App
A mobile app and a platform for managing the company’s products: gates, turnstiles, and fencing. I worked directly with the client on both.
2022 – 2023
2022
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
2016 – 2019
Strike Social AI SaaS platform
A self-service platform for running video ads on social media. Marketers manage many campaigns in one place, keeping costs low and performance high. I designed the whole interface, ran usability tests with users, and later led the design team.
2016 – 2019
2014 – 2016
TrueView Advertising platform
A tool that tracks 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

Experience

2025 – now
Product Experience Manager
Lemonlight
2025 – now
2024 – 2025
Senior Product Designer
Lemonlight
2024 – 2025
2019 – 2024
Lead Product Designer
UNUM
2019 – 2024
2019
Product Designer
Strix
2019
2014 – 2019
Lead Product Designer, Product Owner
Strike Social
2014 – 2019
2014
UI/UX Designer
edrone
2014
2010 – 2014
UI/UX Designer, Graphic Designer
Misc
2010 – 2014

Connect

Find me on LinkedIn, or email me at info@soja.digital.