John Kleinad

Available to hire

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.

About

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.

  • 5 years' experience
  • Joined June 2026

Languages

  • Spanish; CastilianFluent
  • EnglishAdvanced

Industry experience

  • Software & Internet
  • Professional Services
  • Real Estate & Construction
  • Media & Entertainment
  • Gaming

More experts in Mexico City, Mexico

Work experience· 5 roles

Product Engineer · BamagroJan 2024 – Present · 2 yrs 11 mos

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.

CTO / Product Engineer · Yauz IncJan 2024 – Present · 2 yrs 11 mos

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.

Independent Consultant / Product EngineerJan 2023 – Present · 3 yrs 11 mos

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.

Internal Solutions Developer · Grupo TracsaOct 2022 – Nov 2023 · 1 yr 2 mos
Frontend Developer · Xoy CapitalJan 2021 – Jun 2022 · 1 yr 6 mos

Hire John Kleinad today

Post a job and invite John, or contact them directly. No hidden commission.

Post a job