Full-Stack Software Engineer
I'm Yousen. For business owners who need software thatworks — not a vendor who disappears after launch. One engineer, full attention, modern patterns, a fair rate.
Selected Work
Real projects for real clients and products. No stock dashboards — these are the systems businesses run on.
Parental control app rebuilt from a brittle legacy codebase into a maintainable, store-published product with real payments.
Led the legacy refactoring and hybrid migration, shipped an admin platform, integrated payments, and handled App Store publishing end to end.
Real-time industrial monitoring system migrated off a monolithic Laravel stack onto a modular event-driven architecture.
Designed a modular architecture for real-time data processing from field devices, replacing fragile legacy flows with resilient message-driven pipelines.
A developer-tool landing page engineered for speed — Astro, React islands, and zero layout shift.
Built as a fast, accessible marketing surface for a developer product. Demonstrates the same stack this very portfolio runs on.
A clean business showcase for an automotive client — content-first, mobile-first, and easy for the owner to update.
Translated a non-technical client's needs into a performant showcase site with a clear conversion path and local SEO.
What I do
Six ways I can help. Pick the one that sounds like your problem — or tell me and we'll figure it out together.
SaaS, admin dashboards, and business logic — built to scale with your operation, not against it.
Fast, conversion-focused sites that make a small business look like the established player it is.
Cross-platform iOS + Android apps with one codebase and a native-feeling experience.
Untangle the old codebase. Keep the data, lose the fear of touching it.
Resilient services, queues, and data models designed for the next five years.
Sell and show with confidence — storefronts and catalogues that just work.
How we work
Five stages from first call to ongoing support. You always know what's happening and what's next.
We map the real problem — not the symptom. A written brief, plain-language, before a line of code.
Wireframes and architecture you can actually read. Decisions made together, documented, reversible.
Weekly, visible progress. You see working software — not a black box until launch day.
Real devices, real data, real users. A calm, rehearsed launch instead of a 3am firefight.
24h response, weekly check-ins, and a plan for what comes after the first version ships.
About
I'm a full-stack software engineer with an MSc in Software Engineering. I started in high school wiring Arduinos and hacking HTML and PHP — and I never stopped building.
What businesses actually get from me: clean architecture that scales, the best UX with fluid motion, and a habit of making complex things feel simple. No handoffs to a junior, no vanishing act after launch. You talk to the person doing the work.
Proposal Simulator
No email required. Pick what you need and see a realistic budget range. It's a starting point — the real plan comes in our free call.
Let's talk
Two ways in, zero commitment. Pick the one that fits, and I'll get back within 24 hours.
Tell me about the problem over a call. You leave with a clearer picture — whether or not we work together.
Have an existing app? I'll review it and tell you, honestly, what's solid and what's a liability.