Hi, I'm
|

Frontend developer working on production web apps in Next.js and React.

About

Frontend developer focused on production work.

Five years of frontend engineering, mostly in React, Next.js and TypeScript. I've been at Canary Technology Innovations since 2021, working across two complementary surfaces: in-house B2B/B2C recruitment SaaS (Next.js + Supabase + Cloudflare Workers + Vercel AI SDK, Turborepo monorepo) and a multi-site UK consumer-brand network — including a five-site network for a Japanese vehicles brand (Next.js + Umbraco/Contentful + GraphQL).

Day-to-day mix of feature work, AI-tooling-augmented engineering, CMS module integration, GTM/dataLayer tracking, performance (LCP, fetch priority), accessibility patches, and multi-language localization. I prefer concrete improvements I can measure over architectural rewrites.

Comfortable across the typical frontend stack: TypeScript, GraphQL, SCSS Modules, Tailwind, Apollo Client, Vercel AI SDK, plus deep CMS integration (Umbraco, Contentful, WordPress). Outside work, I ship AI-augmented side projects end-to-end (mobile + web + payments + on-device ML).

Download Resume

marian.profile.ts

import { FrontendDeveloper } from './types';

const marian: FrontendDeveloper = {

yearsOfExperience: 5,

location: 'Bucharest, Romania',

specialties: [

'multi-site CMS platforms',

'AI-augmented SaaS',

'e-commerce funnel tracking',

'Core Web Vitals',

currentlyBuilding: [

'production CMS networks',

'AI-powered side projects',

};

// always shipping — see Featured Work below

Career Journey

2024 - Present

Senior Frontend Developer

Canary Technology Innovations

Led the 5-site UK/IE mobile performance initiative (LCP −30-50%) on the consumer brand network under live client release cadence, maintained accessibility infrastructure across the network, and drove AI-assisted engineering adoption across the team.

2022 - 2024

Frontend Developer (Mid)

Canary Technology Innovations

Co-authored the form-engineering pattern reused across 20+ multi-step modules and owned features end-to-end across automotive, fuel/EV, leisure, and rail. Contributed to GraphQL/Apollo design and CMS integrations (Umbraco, Contentful, WordPress).

Jan 2021 - 2022

Frontend Developer (Junior)

Canary Technology Innovations

First developer role. Onboarded onto the React/Next.js + TypeScript codebase and shipped to production via AKS, Vercel, Cloudflare Workers, and Azure DevOps pipelines.

5 Years

Frontend engineering in production

Next.js & React

TypeScript, Apollo GraphQL, SSR

Performance

Core Web Vitals, image optimization, caching

Tracking & SEO

GTM, sitemaps, structured data, CSP

Skills

The stack I work with day-to-day on production projects.

Frontend

Next.js (App Router)ReactTypeScriptTailwind CSSSCSS ModulesMaterial UIAnt DesignStyled Components

Data & AI

GraphQLApollo ClientRedis (SSR cache)Vercel AI SDKOpenAIGeminiREST APIsReact QueryReduxContext API

CMS & Backend

UmbracoContentfulWordPressSupabase.NET / C# (read & integrate)Node.js

Forms & Validation

React Hook FormYupreCAPTCHAMulti-step form engineering

Tracking & Analytics

GTMdataLayer architectureContentsquareFreespeeStoryStreamOneTrust consent

Mobile & Tooling

Capacitor (Android + iOS)TurborepoViteWebpackJestPlaywrightGitJira

Currently exploring more on the SSR/edge side and bundler internals.

VercelCloudflare WorkersAWS AmplifyFirebaseNetlifyAzure DevOpsPostHogStripeRevenueCat

What I Work On

Two areas where I've shipped real production work, with the trade-offs and rough edges that come with it.

Production Web Apps

Customer-facing sites in Next.js + React. Comfortable in large codebases with GraphQL, CMS-driven content, and multi-environment deployments.

Technologies

Next.jsReactTypeScriptApollo GraphQLTailwind / SCSSDocker

Key Features

SSR & SSG
GraphQL data layer
TypeScript end-to-end
Accessibility & i18n

Performance & Tracking

The unglamorous-but-shipping work: Core Web Vitals, image fetch-priority, CSP rules, GTM/dataLayer pipelines, and SEO infrastructure.

Technologies

Web VitalsGTMCSPLighthouseSitemapsJSON-LD

Key Features

Core Web Vitals (LCP, CLS)
Image optimization
GTM / dataLayer
Structured data (JSON-LD)

Looking for a frontend developer?

If you're hiring or have a Next.js / React project that needs an extra pair of hands, get in touch.

Featured Work

Recent client and product builds at Canary — a mix of in-house SaaS and high-traffic UK consumer sites. Names anonymized; details and links available on request.

https://example.co.uk

Top Japanese Vehicles Brand — multi-vertical network

5 sibling sites, 4 verticals
Auto, Bikes, ATV, Marine
UK + Ireland regions

2022 – Presentvia Canary Technology Innovations

Top Japanese Vehicles Brand — multi-vertical network

Long-running engagement across five sibling Next.js + Umbraco sites for a global Japanese vehicles brand: Auto (UK + Ireland), Bikes UK, ATV UK, Marine UK, Marine Ireland.

Next.jsTypeScriptApollo GraphQLUmbracoRedisSCSS ModulesGTM / dataLayerContentsquareFreespeeOneTrustAzure DevOpsAKS

Contributed across a multi-site Next.js + Umbraco + Apollo GraphQL platform with polymorphic page-type GraphQL routing, a dynamic module-loading registry, and a Redis-backed server-side query cache.
Designed and maintained the GTM and dataLayer event taxonomy across configurator, dealer, and booking funnels — full e-commerce-style tracking with consent-gated submissions.
Form engineering: multi-step React Hook Form + Yup + reCAPTCHA flows across booking, brochure request, recall, business enquiry, EV pre-registration, and send-to-dealer modules.
CSP rule maintenance and third-party integration surface (analytics, engagement, ads, maps, payments) orchestrated under OneTrust consent gating.
Mobile image fetch-priority and breakpoint-tuned quality for LCP wins; accessibility patches; schema markup for SEO across verticals.

https://example.co.uk

B2B Recruitment SaaS Platform

AI CV parsing + form builder
Team accounts + billing
Shortlist & candidate flows

2024 – Presentvia Canary Technology Innovations

B2B Recruitment SaaS Platform

Multi-tenant recruitment & shortlisting SaaS with AI-powered CV tooling, built on a Turborepo monorepo deployed to Cloudflare Workers.

Next.js (App Router)TypeScriptTurborepoSupabaseVercel AI SDKCloudflare WorkersTailwindPostHog

End-to-end feature delivery on the web app — auth, billing, team accounts, admin, shortlist, candidate flows.
Heavy AI-tooling-augmented engineering: Vercel AI SDK + OpenAI + Gemini integrations for CV parsing, form generation, and editor flows.
Internal package work across the monorepo (cv-form, cv-parser, ui, billing-gateway).

https://example.co.uk

B2C CV Builder Platform

Multi-template CV editor
PDF export & live preview
Account & subscription flows

2023 – 2024via Canary Technology Innovations

B2C CV Builder Platform

Consumer-facing SaaS for building, editing, and exporting CVs — handmade by the team, no AI scaffolding.

Next.jsTypeScriptSupabaseReact PDFTailwindStripe / billing

Frontend feature work across the editor, preview, and template system.
Account flows, subscription wiring, and onboarding UX.
PDF export pipelines and template-to-document rendering.

https://example.co.uk

UK Overnight Rail Service

Multi-step booking flow
Routes, fares & cabin selector
Account & journey management

2024 – Presentvia Canary Technology Innovations

UK Overnight Rail Service

Booking and content platform for a UK→Scotland sleeper-train operator. Travel-domain UX with multi-night journeys, cabin classes, and account-driven booking management.

Next.jsTypeScriptUmbracoGraphQLSCSS ModulesGTM

Built and integrated new Umbraco-driven content modules into the existing Next.js codebase.
Shipped UI features and visual updates across booking and content pages — routes, fares, cabin selection, and account flows.
Read existing C# / Razor backend components to wire up new doc types and partial views correctly; accessibility patches and visual polish.

https://example.co.uk

UK Leisure & Holiday Resort

Lodge browse & filtering
Activity / spa modules
Seasonal campaigns

2024 – Presentvia Canary Technology Innovations

UK Leisure & Holiday Resort

Marketing and booking site for a Welsh national-park resort brand. Family-leisure UX with lodges, activities, spa bookings, and seasonal campaigns.

Next.jsTypeScriptUmbracoGraphQLSCSS ModulesGTM

Created new frontend modules and refined existing ones across the marketing site — lodge browse and filtering, activity and spa modules, seasonal campaigns.
Integrated FE components with Umbraco doc types, partial views, and content models.
Cross-browser and cross-device testing, accessibility patches, and visual polish across the funnel.

Earlier work spans fuel & EV solutions, fuel-station-locator apps, EU-funded international projects, and legacy modules across healthcare and education — references available on request.

Personal AI Projects

Solo-built, AI-assisted side projects — prompt-engineered with Lovable, then integrated, refined, and shipped end-to-end. Each one ships as a mobile app (Capacitor) or PWA, with a separate landing site, Supabase backend, and payments wired in.

I'm transparent that the initial scaffolding was AI-generated. What's mine is the product direction, the prompting strategy, and the real-world wiring: auth, edge functions, Stripe / RevenueCat, on-device ML, mobile builds, and deploy.

GeniusFit AI

Scan what you eat. Get an AI coach.

Photo → meal recognition (AI vision)
Macro tracking + workout planner
AI nutrition + longevity insights

Side project · Mobile + Landing

GeniusFit AI

ViteReactTypeScriptCapacitor (Android + iOS)Supabase (DB, Auth, Edge Functions)Framer Motion (landing)Push notifications

AI-assisted nutrition coach with on-device camera scan (plate + label), backed by Supabase edge functions for meal-plan generation and food search. Public landing site built separately with Framer Motion + scroll parallax.

Visit geniusfit-ai.com

SkinLove AI

Scan products. Build a smarter shelf.

Ingredient scan + analysis
Personal shelf + harmony score
Routine insights over time

Side project · Mobile + Landing

SkinLove AI

ViteReactTypeScriptCapacitor (Android)Supabase (DB, Auth, Edge Functions)i18n (EN / RO)Playwright

AI-assisted skincare companion: ingredient parsing, product harmony scoring, and a personal shelf — backed by Supabase edge functions and a typed Lovable Cloud auth layer. Public landing site at skinlove-ai.com.

Visit skinlove-ai.com

autopixel-ai.vercel.app

AutoPixel AI

Inspect a used car from photos.

On-device image analysis
VIN decode + listing scrape
Shareable scan reports

Side project · Web (PWA)

AutoPixel AI

ViteReactTypeScriptHugging Face Transformers (on-device ML)React Three FiberSupabase + Stripe CheckoutPWA / offline (Vercel)

Used-car inspection PWA: client-side ML for damage/respray detection, VIN decode + listing scrape via edge functions, Stripe checkout for premium reports, offline-capable.

Visit autopixel-ai.vercel.app

Source code on request

Get in touch

Tools I built

lab.marian-miloiu.com

2026 Senior Frontend Standards

Interview Mastery
Lab

⚡JavaScript

🔷TypeScript

🧠React Core

🚀Frameworks

⚙️Performance

🛡️Quality

💎Consultant

📓Prep

Side project · Web

AceTheCode

Interactive Frontend Interview Lab

An interactive lab I built to deepen my own understanding of senior-level frontend concepts — the topics that actually come up in mid-to-senior interviews. Every module is taught at three articulation levels (Junior · Middle · Senior) so the deltas in framing are visible, plus a 'Learn vs Interview' toggle that swaps the explanation into the answer you'd give in the room.

19 deep-dives — event loop, React Fiber, hooks internals, RSC, web vitals, system design, security
7 hand-crafted Framer Motion animations for the hard concepts
7-Story STAR workbook for behavioral interview prep

Vite · React 18 · TypeScript · Framer Motion · Tailwind · shadcn/ui

Open the lab

Writing

Notes from production

Occasional writeups of real problems I worked on — short, technical, no fluff.

Wiring 40+ third-party scripts under OneTrust consent on a UK consumer site

Architecture

7 min read•Apr 30, 2026

Wiring 40+ third-party scripts under OneTrust consent on a UK consumer site

How a UK consumer brand site keeps GTM, Contentsquare, Freespee, StoryStream, ad pixels and 40+ origins working in production — without breaking GDPR, CSP, or pageviews. A consent-callback registry pattern, a per-environment CSP middleware, and the trade-offs nobody writes about.

Read Article

Mobile LCP: cutting hero image cost on a CMS-driven Next.js site

Performance

5 min read•Feb 15, 2026

Mobile LCP: cutting hero image cost on a CMS-driven Next.js site

A real production task: lowering Largest Contentful Paint on the landing pages of a high-traffic UK consumer site by tuning image fetch-priority, sizes, and CMS-side quality — without rewriting the renderer.

Read Article

View All Articles

Contact

Open to discussing roles, freelance, or interesting problems.

Get in Touch

Open to discussing roles, freelance, or interesting frontend problems. Drop me a line.

Email

miloiu_marian@yahoo.com

Phone

+40724402738

Location

Bucharest, Romania

Response Time

Usually within 24 hours on weekdays.

Hi, I'm|

About

Frontend developer focused on production work.

Career Journey

Senior Frontend Developer

Frontend Developer (Mid)

Frontend Developer (Junior)

5 Years

Next.js & React

Performance

Tracking & SEO

Skills

Frontend

Data & AI

CMS & Backend

Forms & Validation

Tracking & Analytics

Mobile & Tooling

What I Work On

Production Web Apps

Performance & Tracking

Looking for a frontend developer?

Featured Work

Top Japanese Vehicles Brand — multi-vertical network

B2B Recruitment SaaS Platform

B2C CV Builder Platform

UK Overnight Rail Service

UK Leisure & Holiday Resort

Personal AI Projects

GeniusFit AI

GeniusFit AI

SkinLove AI

SkinLove AI

AutoPixel AI

AutoPixel AI

Interview MasteryLab

AceTheCode

Notes from production

Wiring 40+ third-party scripts under OneTrust consent on a UK consumer site

Mobile LCP: cutting hero image cost on a CMS-driven Next.js site

Contact

Get in Touch

Email

Phone

Location

Response Time

Hi, I'm
|

Interview Mastery
Lab