Senior .NET / React.js Fullstack Engineer

Full-stack software
that ships and scales

Hi, I'm Rolland Nagy — better known as Pongi. 8 years of software craftsmanship building enterprise applications across E-commerce, Healthcare and Retail — from architecture to pixel-perfect UI, for platforms used by millions of people.

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8+Years Experience
50+Technologies Mastered
4Enterprise Platforms Shipped

About
Rolland Nagy

RN Rolland "Pongi" Nagy
aka Pongi

Senior .NET / React.js Fullstack Engineer with 8 years of experience. Software craftsman with a demonstrated history who dives deep into complex enterprise applications and who likes to develop scalable architectures. Worked in industries such as E-commerce, Healthcare and Retail.

I care about clean code, observability and systems that hold up under real traffic — from designing microservices and catalog synchronization pipelines to leading UI migrations across 15 development teams.

Backend

C# v13.NET v8.NET Web APIExpress.js REST APISOAPEntity FrameworkSSO OAuthJWTAzure ADLINQSwagger

Frontend

React.jsReduxAngularVue.js Node.jsTypeScriptJavaScriptMaterial UI ShadcnTailwindFigma

Cloud & Infra

Azure FunctionsAzure SQLAzure Storage Azure VaultAzure MonitorAzure Kubernetes (AKS) Digital OceanDocker

Architecture & Data

MicroservicesASP.NET MVCMSSQLPostgreSQL MySQLMongoDBRedisRabbitMQ ElasticsearchKibana

DevOps & Testing

GitHub ActionsGitLab CIBitbucket Pipelines PlaywrightSeleniumCypressxUnit SonarqubeTeamCityOctopus
17K+ users streamlined onto self-service analytics exports
25K+ daily visitors served on a scaled e-commerce platform
100K reports processed per month across 4 unified REST services
20+ services integrated into one catalog sync platform, 6 countries

Selected
Experience

Four roles, one throughline: taking ambiguous, high-traffic problems and shipping durable .NET + React.js systems around them.

H
Jun 2025 — Jul 2026 Senior React.js / .NET FullStack Engineer

Retail Analytics Platform

Hitachi

A retail analytics provider for Fortune 100 companies, scaling in-depth analytics to 20B+ clients.

  • Streamlined export workflows for 17K users to branded Excel/PowerPoint with dynamic charts using React.js, .NET and OpenXML.
  • Redesigned reporting data flows for 100K reports/month by unifying 4 REST services into one source of truth.
  • Cut microservice response times by profiling hotspots and refactoring slow endpoints to async with C#, Sentry and Azure Monitor.
  • Migrated a legacy Angular UI to a reusable React.js component library shared across 15 development teams.
C# v13.NET v8React.jsRedux.js RxJSHighcharts.jsPostgreSQLKubernetes
S
Oct 2021 — May 2025 Senior React.js / .NET FullStack Engineer

Healthcare E-Commerce & ERM Platform

Synlab International

Europe's #1 healthcare and pharma company, modernizing its ERM platform at scale.

  • Led a new e-commerce platform for 25K+ daily visitors managing lab tests online with .NET, React.js and BigCommerce.
  • Designed a catalog synchronization service integrating 20+ services with a central database using .NET WebAPI and Hangfire.
  • Digitized payment processing across 6+ countries for government benefits and insurance access.
  • Shipped a page-builder so non-technical managers could edit the client-facing site from Figma designs.
C# v13.NET v8React.jsAngular Material MSSQLMongoDBElastic StackDocker
M
Oct 2017 — Sep 2021 Knockout.js / .NET FullStack Developer

Market Research Platform

MetrixLab

Netherlands' top-3 global market research platform, modernizing for Fortune 100 clients.

  • Improved dashboard load time and onboarding for brand clients like Disney with LINQ and Entity Framework.
  • Led a step-by-step transition plan to future-proof third-party libraries platform-wide.
  • Built a feedback module filtering and routing signal to decision-makers.
C# / .NET 6BlazorKnockout.jsMSSQLAzure DevOps
F
Jan 2023 — Ongoing Personal Project

Loyalty Card Management Platform

Fidelcard

A greenfield platform for business owners to launch and customize branded loyalty cards.

  • Built end-to-end with .NET and React.js, issuing branded cards directly into Apple Wallet and Google Wallet.
.NETReact.jsApple WalletGoogle Wallet

Education &
Background

BSc in Computer Science

Sapientia Hungarian University of Transylvania

Târgu-Mureș · 2020

Languages

English — Advanced Romanian — Native Hungarian — Native

Based In

Romania, European Union

Open to remote & hybrid roles

Let's work together

rolenagy@gmail.com

+40 748 366 685  ·  Romania, European Union

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