Web SaaS, mobile apps, and games built with strong code logic, number logic, and reliable system behavior.
Designer + developer with deep experience in code logic and number-driven systems.
Main domains include web SaaS, mobile apps, and card-style game mechanics with a focus on predictable behavior.
Send a project brief to collaborate on random generation, rule engines, and production-ready logic for your product.
I am a designer/developer focused on web SaaS, mobile apps, and games where system behavior matters as much as visuals. I spend most of my time refining logic flows and implementation details that keep products stable.
Core strengths include code logic, number logic, random number generation and card game rule engines. I build systems that are deterministic when needed and still flexible for product iteration.
Outside software, I am an ISSF pistol shooter and bring that same precision mindset into engineering decisions.
The goal is simple: build products that feel clear, fair, and predictable even when the logic is complex.
A project spotlight aligned with s.ebastin's focus on precise, production-ready product logic and practical workflows.
A lightweight floor plan editor for multi-floor projects with fast drafting, symbol placement, and production-ready exports.
Highlights
Outcomes
Designing reliable logic systems is hard.
Many teams can ship UI quickly, but struggle when product behavior depends on deeper rules and edge-case handling.
Weighted outcomes, deterministic random generation, and card state transitions are easy to get wrong without strong number logic.
Bugs hide in branching paths and inconsistent state updates.
The product feels unpredictable and trust drops fast.
With a clear logic architecture, you know exactly where to place rules, how to validate outcomes, and how to keep behavior understandable for the whole team.
You stop guessing whether random values are fair or whether game states can desync, because the system is designed to be auditable.
Most importantly, users get consistent outcomes they can trust.
That reliability becomes a major product advantage.
s.ebastin structures product behavior into clear modules so complex logic remains easy to evolve across releases.
Teams gain confidence because business rules are explicit and testable.
The same approach applies across SaaS workflows, mobile app state, and game engines.
Start with the model and push it into production logic.
We map rules, implement edge-case-safe code paths, and validate outputs with deterministic checks. With this process, products behave consistently across every user action from onboarding flows to card draw mechanics.
Share your requirements for SaaS, mobile, or game logic projects.