+0%
faster on Google PageSpeed Insights, through RxJS/NgRx state work and Angular rendering optimisation.
I rebuild frontends without freezing the roadmap.
Frontend at Twin Science, where I led the migration off Angular 8 and took app.twinscience.com 65% faster. Before that, six published mobile games as sole developer.
Employed full-time — taking freelance projects alongside it
Berkay Arda Yıldızİstanbul, TR
Technologies
AngularReactNext.jsTypeScriptRxJSNgRxReact NativeNode.jsExpressMongoDBRedisSocket.IOTailwind CSSUnityC#
Measured, not claimed
What the work actually moved.
Every figure below comes from a shipped build, and each one names where it was measured.
0
Desktop Performance, with 100 Best Practices and 100 SEO. Largest Contentful Paint at 1.0s.
0
Desktop Performance, with 100 Best Practices and 100 SEO. 92 on mobile, Largest Contentful Paint 0.7s and no layout shift.
0
games published as sole developer — five at Servo Studios, one independently, on thirty-day cycles.
0%
uptime with 100% email delivery, while official sources were down.
0/5
in UX and visual design — 4th of 28 overall, 3rd for user experience.
Speed is not a feature you bolt on at the end. It is product quality, and it is a requirement from the first commit.
01
Performance is the baseline
Speed is not a bonus feature. It is product quality, and it is a requirement from the first commit.
02
People, not screens
I design experiences, not surfaces. Every interaction should read as clear, purposeful and easy to trust.
03
The roadmap does not stop
I build large rewrites incrementally, so the team never has to stop releasing to accommodate them.
04
Technology serves something
I run science and AI workshops with YGA for children in the regions hit by the 2023 earthquakes.
Selected work
01/ 05
Four builds that had to survive real users.
A platform shipped to web, iOS and Android, a published library, a studio site and an alerting service. Different shapes, same constraint.
All projectstuzluk.app
Tuzluk
2026 —A multi-tenant QR menu and table-ordering platform for restaurants — live menu, waiter-approved orders, floor plan and kitchen display off one data model. Next.js 16, Prisma + PostgreSQL, tenant isolation down to Postgres RLS, SSE realtime and an anti-abuse flow of waiter approval, PIN and device limits.
Next.js 16TypeScriptPostgreSQLPrismaPostgres RLSUpstash RedisSSETailwind CSS
cinekholm.com
Cinekholm
2025 —An AI-powered film discovery platform with multi-dimensional taste profiles, recommendations and a social layer. Angular SSR web client, iOS and Android apps in React Native, Express API and Redis + BullMQ queues.
React NativeiOSAndroidAngular SSRTypeScriptOpenAIMongoDBRedis + BullMQSocket.IO
npmjs.com/package/bay-carousel-ng
bay-carousel-ng
2026A standalone Angular 21 carousel library published on npm — breakpoint handling, drag, autoplay and template overrides.
Angular 21TypeScriptSCSSnpm
noova212.com
Noova 212
2023An end-to-end corporate site for an architecture firm. Shipped at Lighthouse 95 Performance, 96 Best Practices, 91 SEO.
JavaScriptHTML/CSSResponsive
benibilgilendir.com
benibilgilendir.com
2025An earthquake alert service polling AFAD every five minutes for magnitude 3.5+ within 200km of Istanbul. Held 99.9% uptime through official-source outages.
Node.jsReactcronSMTP
Freelance
Three ways I take on outside work.
Scoped and scheduled around a full-time role, so the timeline is realistic from the first day. I say no to anything I cannot finish properly.
Performance audit
I measure a live Angular or React app, open up its render path and state layer, and leave a prioritised list of fixes.
1–2 weeksMigration off legacy
A migration plan you can ship in slices, plus the first slices built — the shared component layer and the routes that unblock the rest. Releases keep going throughout.
Scoped per projectInterface and motion
Product pages, component libraries and scroll storytelling — built, documented and handed over as code you own.
Per projectRemote from İstanbul · Turkish or English · code stays yours
Tell me about the projectBefore the web
Six published games, thirty-day cycles.
Path
Games first, then production frontend.
09/2023 — now
Software Engineer / Frontend Developer · Twin Science
Led the Angular 8 to React migration and established the reusable component architecture. Ran frontend architecture across 5+ concurrent projects and drove a 65%+ PageSpeed gain on app.twinscience.com. Built an AI content editor and Node.js prompt pipelines, shipped the Scratch-based components behind code.twinscience, and owned Sentry monitoring and code review.
07/2023 — 09/2023
Frontend Intern · Twin Science
Component work across edtech products — the foundation of production-level frontend discipline.
11/2022 — 06/2023
IMAGINER Student Ambassador · Microsoft
Ran student workshops and technical sessions on Microsoft tooling at university and community events.
06/2022 — 02/2023
Junior Game Developer · Servo Studios
Owned the full lifecycle of five mobile games in Unity and C# — sole developer and product manager, shipping inside one-month deadlines.
05/2023
Software Engineer Intern · Beylikdüzü Municipality
A short public-sector term on implementation-focused engineering tasks.
2023 —
Science and AI workshops · YGA
Leading science and AI workshops for children in the regions hit by the 2023 earthquakes.
Credentials
Stack, education and languages.
The details, in one place and in plain text.
Stack
LanguagesTypeScript · JavaScript · Java · Python · C# · C/C++ · SQL
FrontendAngular · React · Next.js · React Native · HTML/CSS · Tailwind CSS · RxJS · NgRx
Backend & dataNode.js · Express.js · MongoDB · Redis · Socket.IO
ToolsUnity · Git · OpenAI · WordPress · Cursor · Amplitude · Photoshop
Education
2020 — 2024Istanbul Aydın University
B.S. Software Engineering
B.S. Software Engineering
2019 — 2020Yeditepe University
English Preparatory, C1
English Preparatory, C1
2018Erasmus+, Lisbon
Cultural Introduction Programme
Cultural Introduction Programme
Languages
EnglishC1
GermanA2
SpanishA1