You will get a clear diagnosis and fix plan for your React or Next.js issue
Project details
I will investigate one clearly defined React or Next.js production issue and deliver a focused diagnostic report. I will review the reproduction steps, relevant logs, code, configuration, and deployment context; identify the most likely root cause and related risks; and provide a recommended fix plan, implementation estimate, and acceptance criteria. This package covers diagnosis only. Fix implementation, broad refactoring, unrelated issues, and 24/7 incident response are not included.
Programming Languages
JavaScript, TypeScript, GoCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included $350
These options are included with the project scope.
$350
- Delivery Time 2 days
- Number of Revisions 1
- Bug Investigation
- Fix Documentation
Frequently asked questions
About Kenta
Senior Full-Stack Engineer | Next.js, APIs, Automation, Cloudflare
Nakano, Japan - 7:14 am local time
I am a Japan-based full-stack engineer with 13+ years of experience across client development, e-commerce SaaS, and HR technology. My core stack includes TypeScript, React, Next.js, Go, Java, Python, MySQL, PostgreSQL, AWS, Docker, and Cloudflare Workers.
Relevant work includes a multi-tenant applicant tracking platform built from zero to production, automated recruiting workflows using crawlers and external APIs, scheduled data pipelines on AWS Lambda, and public API and CI/CD improvements for an e-commerce SaaS platform.
I can help with:
- React / Next.js production bugs and incomplete features
- API, authentication, webhook, and payment integrations
- Python / GAS / serverless workflow automation
- Cloudflare Workers and AWS deployment issues
- Japanese localization and Japan-specific product behavior
Share the current behavior, expected result, stack, and deadline. I will recommend a focused first step and a clear scope before implementation begins.
Steps for completing your project
After purchasing the project, send requirements so Kenta can start the project.
Delivery time starts when Kenta receives requirements from you.
Kenta works on your project following the steps below.
Revisions may occur after the delivery date.
Review evidence and reproduce the issue
I review the supplied reproduction steps, logs, screenshots, code, configuration, and deployment context.
Identify the root cause and risks
I isolate the most likely cause, confirm supporting evidence, and note related technical and business risks.