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I am a full-stack developer with 5+ years of experience building and fixing production web apps, dashboards, admin panels, CRM-style workflows, and internal tools. I work best when something needs to ship quickly: debugging broken React flows, stabilizing dashboards before demos, connecting frontend screens to APIs, cleaning up UI issues, and turning unclear requirements into working product slices. For this role, I can help immediately with React/Next.js debugging, production triage, API integration issues, dashboard UX fixes, and smoke testing the main flows before the client demo to ensure a solid, demo-ready product.…I am a full-stack developer with 5+ years of experience building and fixing production web apps, dashboards, admin panels, CRM-style workflows, and internal tools. I work best when something needs to ship quickly: debugging broken React flows, stabilizing dashboards before demos, connecting frontend screens to APIs, cleaning up UI issues, and turning unclear requirements into working product slices. For this role, I can help immediately with React/Next.js debugging, production triage, API integration issues, dashboard UX fixes, and smoke testing the main flows before the client demo to ensure a solid, demo-ready product.

John Kleinad

PRO

Full Stack Developer, Web Developer, Front-End Developer, +2

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I am a full-stack developer with 5+ years of experience building and fixing production web apps, dashboards, admin panels, CRM-style workflows, and internal tools. I work best when something needs to ship quickly: debugging broken React flows, stabilizing dashboards before demos, connecting frontend screens to APIs, cleaning up UI issues, and turning unclear requirements into working product slices. For this role, I can help immediately with React/Next.js debugging, production triage, API integration issues, dashboard UX fixes, and smoke testing the main flows before the client demo to ensure a solid, demo-ready product.…I am a full-stack developer with 5+ years of experience building and fixing production web apps, dashboards, admin panels, CRM-style workflows, and internal tools. I work best when something needs to ship quickly: debugging broken React flows, stabilizing dashboards before demos, connecting frontend screens to APIs, cleaning up UI issues, and turning unclear requirements into working product slices. For this role, I can help immediately with React/Next.js debugging, production triage, API integration issues, dashboard UX fixes, and smoke testing the main flows before the client demo to ensure a solid, demo-ready product.

Available to hire

Mexico City, Mexico

I am a full-stack developer with 5+ years of experience building and fixing production web apps, dashboards, admin panels, CRM-style workflows, and internal tools. I work best when something needs to ship quickly: debugging broken React flows, stabilizing dashboards before demos, connecting frontend screens to APIs, cleaning up UI issues, and turning unclear requirements into working product slices.

For this role, I can help immediately with React/Next.js debugging, production triage, API integration issues, dashboard UX fixes, and smoke testing the main flows before the client demo to ensure a solid, demo-ready product.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Spanish; Castilian

Fluent

English

Advanced

Work Experience

Independent Consultant / Product Engineer

January 1, 2023 - Present

Built and maintained React/Next.js product interfaces for business workflows. Developed admin panels and CRM-like tools with structured data, forms, tables, filters and role-based flows. Connected frontend applications to GraphQL and REST APIs. Fixed production issues across UI, state, forms, API calls, auth and deployment flows. Worked directly with founders and operators to prioritize what needed to ship first.

CTO / Product Engineer at Yauz Inc

January 1, 2024 - Present

Technology platform for real estate agents and firms, focused on CRM, lead generation, marketing automation and AI-assisted workflows. Designed product architecture and UX for CRM-style dashboards. Built React/Next.js frontend features for lead and agent workflows. Implemented AWS Amplify Gen 2 with Cognito, AppSync, DynamoDB and Lambda. Integrated Google Maps and Places services for location-based workflows. Built lead-generation and follow-up automation flows. Worked across frontend, backend integration, deployment and product decisions.

Product Engineer at Bamagro

January 1, 2024 - Present

Administrative platform and public web portal for the agricultural sector. Designed and built a custom admin panel using React and Vite. Implemented dashboard-style screens for operational users. Connected frontend features to GraphQL data flows with PostGraphile. Delivered responsive UI for internal and public-facing workflows.

Frontend Developer at Xoy Capital

January 1, 2021 - June 1, 2022

Frontend development for digital products in sports betting and entertainment. Led the redesign of the Upick betting platform. Implemented a new frontend architecture based on Next.js. Improved page speed and frontend performance. Refined user flows and navigation for a high-interaction product. Promoted Tailwind CSS and modern frontend standards across the project.

Internal Solutions Developer at Grupo Tracsa

October 1, 2022 - November 1, 2023

Developed internal applications and enterprise tools to improve operational workflows. Built internal web applications for business teams. Automated operational processes. Improved internal information management and cross-team workflows. Supported Microsoft 365 adoption and implementation.