Dane Mackier Portfolio
Ex-game developer turned Flutter specialist whose FilledStacks platform — tutorials, an agency, and tools like TestSweets and SessionMate — traces a full pipeline from teaching Flutter architecture to selling Flutter tooling.
What makes it work
A breakdown of the choices that make this portfolio stand out.
A games-to-mobile pivot as the origin of his architecture focus
Starting in cross-platform games before agency work and Flutter gives a specific, technical explanation for his preoccupation with maintainable large-app architecture.
An agency rebuilt around a framework bet before it was mainstream
Turning an existing agency into FilledStacks specifically around Flutter, at a point when adoption was still early, is a concrete, documented bet.
Internal tooling productized into standalone SaaS
TestSweets and SessionMate read as tools built first to solve his own agency's delivery problems, then packaged for other Flutter teams.
What Mobile Developers can take from this
Specific, actionable tips to apply to your own portfolio — no generic advice.
If a past, unrelated technical background shaped your specialization, name the specific connection explicitly.
If you bet on a framework early, document that timing in your portfolio's history.
Turn internal tools built for your own delivery problems into standalone products for others in the same situation.
Combine a services/agency arm with an education arm if you can sustain both.
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