High-Scale Frontend Architect& Performance Lead for E-Commerce and Platforms

I partner with Heads of Digital, CTOs, and Product Owners when critical web platforms must get faster, more scalable, and reliably shipped — with business outcomes over jargon.

Discuss your projectSee the offers

Remote-first, English & German. Selected engagements: leading motorcycle manufacturer · retail platform with 10+ million products · greenfield healthcare platform.

Services

I join product and engineering leaders when delivery demand peaks — hands-on, pragmatic, and fully embedded in your processes.

Frontend & Full-Stack Delivery
  • React/Next.js products that stay fast and maintainable
  • Type-safe APIs, CI/CD automation, cloud-ready setup
  • Productive from day one inside existing teams
Architecture & Performance
  • Micro-frontends, monorepos, and CI/CD pipelines tailored to your org
  • Core Web Vitals and load times improved with measurable impact
  • Reviews and refactors that keep codebases healthy
Interim Tech Lead & Mentoring
  • Code reviews, engineering practices, and team enablement
  • Onboarding, delivery rituals, stakeholder alignment
Focused Digital Advisory
  • Outcome-driven guidance for roadmap clarity and execution.

Let's map the next increment together — I'll plug into your roadmap fast.

Discuss your project

Technical Expertise

Frontend architecture, performance leadership, and delivery that stands up to business goals.

Frontend
Commerce and platform frontends that stay fast and consistent.
  • React
  • Next.js
  • TypeScript
  • JavaScript (ES6+)
  • HTML5
  • CSS3
  • TailwindCSS
  • shadcn/ui
State Management & Data
Clean data flows and contracts that accelerate releases instead of blocking them.
  • TanStack Router
  • TanStack Query
  • Redux
  • Zustand
  • React Hook Form
  • GraphQL
Architecture & Tooling
Micro-frontends, monorepos, and CI/CD tuned for multiple teams and brands.
  • Monorepos (Turborepo)
  • Micro-Frontends
  • OpenAPI
  • Fastly CDN
  • Webpack
  • Vite
Backend & DevOps
APIs, caching, cloud, and observability with performance and security in mind.
  • Node.js
  • Azure Cloud
  • Azure DevOps
  • Docker
  • PostgreSQL
  • MongoDB
  • GitHub Actions
Development Practices
Shared rituals, reviews, and enablement that keep velocity and quality stable.
  • CI/CD (Continuous Integration & Delivery)
  • Agile (Scrum/Kanban)
  • Code Reviews
  • Performance-Optimierung
  • SEO

Portfolio

Current engagements focused on resilient web platforms.

Current project support(2022–2025)
Three concise cases — problem, action, outcome.

Greenfield web apps2024–2025

  • Problem: 0→1 product, need for time-to-first-value
  • Action: React/TypeScript foundation with TanStack and modular architecture
  • Outcome: Scalable base and early product increments

E-commerce platforms2022–2024

  • Problem: Multi-brand footprint, release pressure, SEO performance
  • Action: Next.js plus multi-tenant architecture, CI/CD, CDN tuning
  • Outcome: Faster releases and stable performance under heavy load

Feedback system2023

  • Problem: GDPR-compliant, anonymous feedback with strict governance
  • Action: tRPC, PostgreSQL, Docker, auth and data flows
  • Outcome: Secure operations with auditable data paths

Open source contributions

Maintaining public packages and shipping fixes to keep teams moving.

@ocodio/query-key-manager
npm package
Type-safe utilities for structuring TanStack Query cache keys across large apps.
  • Fluent API for composing consistent collection, entity, and parameter segments.
  • Eliminates fragile string concatenation when collaborating across multiple teams.
  • Published with documentation and versioned releases for public consumption.
View on GitHubView on npm
next-intl critical bugfix
Upstream contribution
Patched a production-blocking regression in next-intl ahead of a client launch.
  • Identified the root cause while preparing a go-live for localized content.
  • Implemented and verified the fix directly against the affected production scenario.
  • Shared the solution upstream to support the broader next-intl community.
next-intl repository
Portrait of Leon Oberwaditzer

About me

I'm Leon Oberwaditzer, High-Scale Frontend Architect & Performance Lead. I partner with international brands across mobility, healthcare, and retail: performance lead for a European motorcycle manufacturer, architecture & delivery for a retail platform with 10+ million products, tech lead for a healthcare greenfield platform. I tie architecture choices to business goals, work hands-on in code, reviews, and workshops, and keep stakeholders aligned through clear updates. Remote-first, English/German, quick to plug into existing teams.