Available for remote React / Next.js roles

Full-Stack & Front-End EngineerI build precise, high-performance web systems.

Senior React / Next.js engineer specializing in scalable front-ends, clean architecture, and AI-augmented developer workflows.

Email meView selected projects →
ReactReact NativeNext.jsTypeScriptVueNuxt.jsTailwindContentfulPrismaAWSAI tooling

Profile

Marius Repede

Senior Front-End / Full-Stack Engineer

Experience

7+ years

React, Next.js, TS

Focus

Front-end systems

DX, design systems

Based

Remote · US timezone

Open to global teams

Availability

Hiring now

Freelance & full-time

About Me — Senior React & Next.js Engineer

I build modern front-ends and robust full-stack systems with a focus on clarity, performance, and long-term maintainability. My work often involves complex data structures, content platforms, and integrating AI tools into developer workflows.

I've shipped React/Next.js apps with Contentful, Prisma, AWS, and custom design systems; built advanced data visualizations; and designed architectures that multiple teams can build on.

React / Next.js expert
React Native developer
TypeScript-first approach
Contentful & headless CMS
CI/CD & AWS basics
Design systems & UI kits
Data viz (D3.js, custom charts)
AI-augmented workflows

How I can help

From greenfield products to refactors, I bring structure, speed, and calm to complex front-end projects.

Ideal for SaaS, developer tools, dashboards, content platforms, and teams that care about craft.

Front-end architecture

Design and implement React/Next.js architectures that scale with your team and product.

  • • Component libraries & design systems
  • • Folder structure & patterns
  • • Performance and DX improvements

Product implementation

Take your Figma or idea and turn it into a polished, production-ready experience.

  • • Next.js apps & landing pages
  • • Contentful / headless CMS integration
  • • Responsive, accessible UI

AI-augmented workflows

Integrate AI tools into your stack and workflows to ship faster without sacrificing quality.

  • • AI-assisted coding workflows
  • • AI integrations in products
  • • Prototyping complex ideas quickly

Selected Work — React, Next.js, Full-Stack Projects

A snapshot of the kinds of systems I build: from AI-driven tools to analytics dashboards and CMS platforms.

I can walk you through technical details, tradeoffs, and architecture decisions in a call.

AstroBlox.ai

Next.js · TS · 3D · AI tooling

Lead front-end & systems design

AI-assisted 3D content and modular UI engine built with Next.js, TypeScript, and custom pipelines.

Seer Health Dashboard

React · TS · D3.js · Healthcare

Front-end engineer · data viz

Medical analytics dashboard with custom D3.js visualizations and real-time clinical insights.

Contentful Multi-Site Engine

Contentful · Next.js · AWS · DX

Full-stack engineer

Scalable CMS architecture powering multi-brand, multi-region enterprise marketing sites.

ProtoNova Paralink

R&D · linguistics · AI · systems thinking

Creator · R&D

Experimental symbolic-AI and linguistic system exploring new forms of semantic architecture.

Process — My Engineering Workflow & Delivery Approach

I keep things structured and collaborative. Clear phases, visible progress, and technical honesty.

  1. 01 · Discovery

    Clarify goals, constraints, and success metrics. Understand your users and context.

  2. 02 · Architecture

    Propose front-end architecture, data flows, and integration points. Choose sane defaults.

  3. 03 · Implementation

    Build features in small, reviewable slices. Prioritize performance and readability.

  4. 04 · Polish & handoff

    Refine UX, add tests where it counts, document patterns, and support your team onboarding.

Client Recommendations & Testimonials

❝
Scott Ashcraft

Scott Ashcraft

CEO — Health Plans of North Carolina

Marius onboarded fast, hit critical deadlines, communicated clearly, and consistently delivered high-quality work. He worked independently, improved team workflow, and helped us launch on time. I fully recommend him.

❝
Sergio Rafael Gianazza

Sergio Rafael Gianazza

Engineering Manager — ClassDojo

Marius solved complex UI/UX challenges, matched native-app behavior with precision, and delivered work that exceeded expectations. Strong front-end instincts and great to work with.

Let's build something solid.

If you're looking for a senior engineer who can think about systems, UX, and implementation detail at the same time, I'd love to talk.

Email me

Ideal collaborations

Senior front-end roles, staff-level projects, or focused builds for startups & teams.

Stack

React, Next.js, React Native, TypeScript, Vue, Nuxt.js, Tailwind, shadcn/ui, Contentful, Prisma, Node.js, AWS, AI tooling.

Location

Remote · US timezone · comfortable collaborating across continents.