Christian – React, Typescript, Next.js, experts in Lemon.io

Christian

From Spain (UTC+2)flag

Front-end Web Developer|Senior
Full-stack Web Developer|Senior
Back-end Web Developer|Middle-to-senior

Christian – React, Typescript, Next.js

Christian is a senior full-stack engineer with a strong focus on building and evolving complex digital products across iGaming and AI-driven platforms. He excels at designing scalable frontend architectures, leading multi-team initiatives, and making objective technical decisions that support product goals. Christian combines clear communication, a collaborative mindset, and a strong focus on delivering practical business value. He also has experience integrating AI tools into development workflows to improve engineering efficiency.

12 years of commercial experience in
Gambling
Main technologies
React
9 years
Typescript
7 years
Next.js
4 years
Node.js
3.5 years
Additional skills
Tailwind CSS
Nest.js
SASS
SCSS
MCP Server
Product design
Highcharts
web3.js
Canvas
Strapi
Django
Symfony
Python
PHP
Webpack
Docker
Redux
Jest
Bootstrap
jQuery
Microsoft SQL Server
Apache Cordova
SQL
PostgreSQL
MongoDB
Microsoft Azure
LLM evaluation
Claude Code
AI agent development
JavaScript
React Native
LLM
Direct hire
Possible
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Experience Highlights

Javascript Tech Lead
Oct 2025 - May 20266 months
Project Overview

A back-office platform for managing online casino operations, designed for iGaming operations teams. It lets users manage casino tables, configure betting limits, and handle the day-to-day settings needed to run an online casino. I led the frontend architecture and development of the shared platform across three engineering teams.

Responsibilities:
  • Led frontend architecture across 3 teams contributing to the same backoffice application.
  • Drove the redesign needed to support multi-team scalability.
  • Established technical standards and development practices to support a growing engineering organization.
  • Audited the existing codebase to identify pain points and technical debt.
  • Planned foundational re-architecture to address systemic issues.
  • Used AI tools including Claude Code and LLM assistants to support technical decisions, code reviews, and hands-on feature delivery.
Project Tech stack:
React
Node.js
LLM
VP of Engineering
Sep 2022 - Aug 20252 years 11 months
Project Overview

An LLM evaluation platform with a chat-driven interface designed for AI-first development workflows. The platform enables teams to evaluate and compare LLM outputs, iterate on prompts and AI workflows, and improve model performance through structured testing and feedback.

Responsibilities:
  • Served as technical lead in an early-stage startup, working closely with founders.
  • Developed an LLM evaluation platform with a chat-driven UI.
  • Focused on AI-first development workflows using agentic tools like Claude Code and Roo Code.
  • Managed roadmap planning, coding, code reviews, and client communication.
  • Built the engineering team from the ground up, scaling to 5 engineers.
  • Wrote user stories and collaborated with stakeholders to define product features.
  • Worked directly with the designer to implement UI/UX decisions.
  • Balanced hands-on development with leadership responsibilities.
Project Tech stack:
Node.js
React
LLM
MCP Server
Product design
FrontEnd Lead
Mar 2022 - Sep 20225 months
Project Overview

A cryptocurrency data visualization platform providing real-time market data, analytics, and interactive insights for 6M monthly active users. The platform helps users track cryptocurrency prices, explore market trends, analyze asset performance, and make informed investment decisions.

Responsibilities:
  • Led frontend development for a major cryptocurrency data visualization platform.
  • Reduced page load time by 65% through code optimization, lazy loading, and code splitting.
  • Implemented an ad-blocker resistant advertising solution and worked closely with ad partners.
  • Built custom chart components from scratch using Canvas API, SVG, and Highcharts.
  • Migrated the company blog to Strapi CMS, improving content management efficiency.
  • Refactored the legacy codebase, reducing bugs by 70% and establishing consistent coding standards.
  • Managed a team of 4 frontend developers, conducting code reviews and mentoring.
Project Tech stack:
Next.js
Highcharts
Strapi
Canvas
web3.js
Frontend Developer
Jan 2018 - Jan 20191 year
Project Overview

A medical platform that provides prescription management tools, clinical calculators, user profiles, and interactive 3D anatomy features. It supports healthcare professionals and users with accessible tools for managing medical information and understanding anatomical structures.

Responsibilities:
  • Developed a medical prescription tool allowing doctors to prescribe drugs and check interactions.
  • Contributed to the platform rebrand including medical calculators, user profiles, and 3D anatomy features.
  • Worked with React, Redux, Jest, Webpack, Symfony, and Docker.
  • Collaborated in a Scrum environment.
Project Tech stack:
React
Redux
Jest
Webpack
Symfony
Docker

Education

2015
Web aplicac
web application development

Languages

Spanish
Advanced
English
Advanced

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