Fullstack engineer. Civil engineering taught me to think in systems — web is where I ship them. eCommerce platforms, dashboards, and integrations taken from concept to production, designed to scale.
I'm Derem Joshua Rivera — a fullstack engineer. I trained and licensed as a Civil Engineer before transitioning into web, and that background still shapes how I work: I think in systems — constraints, trade-offs, and what 'done' looks like for the people who'll maintain the work six months from now.
In the last year I shipped a production eCommerce rewards platform end to end at VA4U / Tools Australia — admin dashboard, Stripe payments, Meta CAPI & Marketing API tracking, SendGrid + Klaviyo email automation, Hotjar insights — scaled to 20,000+ users and AUD 3,000–5,000 in daily revenue. I lean on a modern toolchain (including AI in the loop) to ship faster without giving up the boring qualities that make code last: clear boundaries, predictable APIs, accessible UI, and documentation the next person can actually use.
Models, contracts, and trade-offs decided up front. Less rework later.
Small, reversible deploys beat heroic launches every time.
If the next dev can't move fast, I haven't shipped yet.
A workflow tuned for speed and durability.
Break the problem down, model the data, define the contracts. Decisions get written down in plain language so the next dev moves fast.
Type-safe, tested code with a modern toolchain. I pair with AI to ship more in less time, without cutting quality.
Deploy, monitor, refine. Boring is a feature.
Production work — context, stack, and what shipped.
Experience and impact at a glance.
Full Stack Developer · Licensed Civil Engineer
Full Stack Developer with 1 year of experience delivering scalable, user-focused web applications. Combines the precision of a Licensed Civil Engineer with modern development skills in Vue, React, Next.js, Node.js, Express, and Laravel. Adept at taking projects from concept to deployment, managing workflows efficiently, and writing clean, maintainable code.
VA4U — Tools Australia
What I reach for across frontend, backend, data, deploy, and the integrations that actually ship revenue.
Hiring, collaboration, or a product idea — send a note. I usually reply within 2 business days.