She builds systems. And fills halls.
Systems engineer with an AI focus (2009), senior full-stack developer from Berlin. She ships revenue systems end-to-end — from the database to the last pixel. Tri-lingual, detail-obsessed, uncompromising on quality.
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Who is CyBERLINTINA?
JaValiantsina — publicly known as CyBERLINTINA — holds a diploma in systems engineering with a focus on artificial intelligence (2009) and works as a senior full-stack developer in Berlin. Her background is engineering, not a bootcamp: architecture, data model and edge cases are settled before the first line of code. She delivers systems end-to-end — from the PostgreSQL database through TypeScript and React interfaces to payment, conversion tracking, deployment and SEO. The evidence is in projects running live in production: her own artist agency with inquiry funnel and SEO (berlintina.de), a booking platform for acrobatics shows (jim-john.de), a shop with Stripe and PayPal payments (berlineon.de) and a real-time AI voice dialogue over WebRTC (berlinike.berlinjohn.de). She works trilingually in German, English and Russian, with genuine internationalisation rather than a translation plugin. Alongside development she advises as a style consultant and performs as a stage artist. For roles in Berlin or remote she can be reached at info@berlintina.de.
JaValiantsina (CyBERLINTINA), Berlin · Last updated: August 2026
Selected Work
Live in production — not in a portfolio folder
Own project · concept, code & operations
Her own artist agency as a web project: Berlin show acts, acrobatics and live music, personally curated — the inquiry funnel, the SEO and the deploy all built and run by her.
Full-stack · booking system
Booking platform for acrobatics shows & events — request to confirmation, end-to-end.
Full-stack · payment
Digital product shop with real payments — Stripe & PayPal, courses & downloads.
Full-stack · real-time AI
Real-time AI voice-to-voice experience — OpenAI Realtime over WebRTC.
Full-stack · this site
This very site — tri-lingual, hand-built, SEO- & schema-optimised. You're reading the code.
Shaped, not built
She studied AI when all of it was still theory
Her degree in systems engineering with an AI focus dates from 2009 — there was nothing to try out back then, only models on paper. Fifteen years later this family runs a voice-first AI cockpit, built by John Förster along exactly that line of thinking. Her share in it is not the code, but the foundation and the daily test.
First pilot · domain sparring, not the code
Voice-first AI cockpit by John Förster (berlinjohn.de) — he built it; the systems thinking behind it comes from her 2009 AI degree, back when all of it was still theory. She flies the first cockpit, tests it daily and says where it breaks.
Case study
An artist agency, built like a system
Data model, permissions in the database rather than the frontend, AI-assisted intake conversation, review tool with live preview, full-text search — the decisions behind berlintina.de, in long form.
Digital product · instant access
Ship-it Starter
The architecture of this very site as a template: React 18 · TypeScript · Tailwind · i18n (DE/EN/RU) · SEO/schema · deploy. Production-grade, not tutorial decoration.
- Tri-lingual routing (DE/EN/RU)
- SEO: hreflang, sitemap, JSON-LD
- Signature design system (Tailwind)
- Deploy script included
Tech Stack
Lived, not listed
Frontend
Backend & Data
AI & Foundations
How I work
Why her code holds up
Systems thinking first
Engineering background, not a bootcamp: architecture, data model and edge cases are thought through before line one.
Detail as attitude
No layout shift, clean states, real i18n, valid schema. What you don't see is built like what you do.
All the way to revenue
Payment, tracking, deploy, SEO — she doesn't just ship features, she ships what actually earns.
For recruiters & teams
She's selective — which is exactly what makes her worth it. Full-time, freelance or advisory: if you want engineering, design taste and revenue focus in one person, reach out directly.