Ayberk Uman

Full Stack Engineer

Ayberk Uman

Full-Stack Engineer with 6+ years of experience building high-performance SaaS platforms and data-intensive interfaces with React, TypeScript, and Next.js. I've scaled production systems used by hundreds of thousands of daily users, migrated legacy monoliths to modern headless and server-component architectures, and shipped real-time and Web3 applications. As the founder of an AI SaaS product, I care deeply about product ownership, performance engineering, and developer experience — and I love building AI, LLM-powered web apps and complex agentic systems.

Timeline

2024 — 2025

  • Full Stack Engineer at Chalhoub Group (Level Shoes) — Dubai, UAE
  • Led the migration from a legacy Magento monolith to a headless Next.js & React architecture serving 200,000+ daily users with a 40% improvement in load times.
  • Revamped the checkout flow with GraphQL (Apollo) caching, reducing steps and increasing conversion by 3%.
  • Built and owned a GraphQL middleware layer that unified separate Magento APIs across web, iOS, and Android clients.
  • Architected WhatsApp post-purchase automation, including event triggers, feedback collection, operational dashboards, and failure monitoring.
  • Built a custom infinite scroll for product lists using DOM virtualization (windowing), keeping the site at 60fps with thousands of products loaded.
  • Took unit test coverage from 10% to 80% and added end-to-end Playwright tests; implemented observability with Sentry, Datadog, and New Relic.
  • Architected the internal design system from scratch using Atomic Design principles and integrated Dynamic Yield for server-side personalized recommendations.

2022 — 2024

  • Fullstack Engineer at Vigilainte — Ankara
  • Shipped 7+ full-stack projects end-to-end as an autonomous full-stack developer, using Hono, Next.js, and React Query.
  • Built scalable content pipelines with headless CMS solutions (Contentful/Sanity), letting the marketing team deploy content globally without engineering bottlenecks.
  • Built an internal, fully automated Blog Post Writer with the OpenAI Agents SDK that writes, optimizes, and publishes SEO content.
  • Reduced marketing page load time by 18% by migrating to React Server Components.
  • Selected work: (yapscribe.com), (skyscribe.blue), (s3xybuttonsturkiye.com)

2020 — 2022

  • Frontend Engineer & Team Lead at Nureply — Istanbul
  • Acted as Frontend Team Lead in an AI-powered cold-email company, guiding junior developers and running code reviews for optimized performance.
  • Led the migration from a legacy create-react-app codebase to the Next.js App Router, improving initial load and LCP by 12% for 2,000+ daily users.
  • Designed and implemented NestJS endpoints and data schemas with best NoSQL practices.
  • Built a custom, TypeScript-heavy API abstraction layer to improve system reliability; used Datadog and PostHog for monitoring and Cypress for end-to-end testing.

2019 — 2020

  • Junior Frontend Engineer at Monk Health — London
  • Developed and maintained three company websites from scratch, deployed to AWS EC2 with GitHub Actions CI/CD pipelines.
  • Built a payment system between hospitals and patients plus an interactive dashboard; improved the admin panel's speed by 30% by migrating class components to functional components and reducing re-renders.
  • Built a feature for patients to easily share documents with doctors via automated in-app messages.