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Fiverr Pro
Nederlands
$
USD
I will fix one issue in your react or node app
Lex K
Over deze dienst
I debug one reproducible issue in an existing React or Node app. Your order includes up to 90 minutes to reproduce the problem, trace the cause, implement a safe fix when feasible, and verify the affected behavior.
I am a senior full stack engineer with 12+ years of experience and work with TypeScript, React, Next.js, Preact, Node.js, Express, NestJS, Firebase, APIs, authentication, databases, dependencies, and configuration.
You will receive:
- the fix when it safely fits the time box
- focused verification of the affected behavior and related regression checks
- concise notes on the cause, changes, and remaining risks
If the issue needs broader work, I will deliver confirmed findings, the root cause or blocker where established, practical next steps, and an optional custom offer.
One order covers one existing repository, one environment, and one agreed expected-versus-actual behavior. It excludes new features, broad refactoring, whole-app cleanup, penetration testing, and guaranteed production readiness.
Please message me before ordering if you are unsure whether the issue fits. Do not send production secrets or live customer data.
Maak kennis met Lex K
Lex K
Senior Full Stack AI Engineer
- Afkomstig uitVerenigde Staten
- Lid sindsaug 2026
Talen
Oekraïens, Russisch, Engels
I'm a senior full stack engineer with 12+ years building and modernizing web, mobile, and desktop products. I work with TypeScript, React, Node.js, React Native, Rust, Python, and cloud services. I can add an AI feature, diagnose a difficult production issue, or own a scoped feature through rollout. My background includes identity and authentication, fintech workflows, mobile apps, local and hosted LLMs, speech systems, and production AI coding workflows backed by review and automated verification. Clients can expect clear scope, direct communication, and maintainable code.
Mijn portfolio
Veelgestelde vragen
What counts as one issue?
One issue is one agreed expected-versus-actual behavior in one repository and workflow. Related symptoms from the same root cause may fit; unrelated bugs are separate scope.
Is a completed fix guaranteed?
I will implement and verify a safe fix if it fits the 90-minute time box. If broader work is required, I will deliver confirmed findings, the root cause or blocker where established, and practical next steps.
What do you need to begin?
Please provide code access, setup instructions, reproduction steps, and expected versus actual behavior. If the issue depends on a specific environment, we can coordinate access in Fiverr chat. Logs or error output are optional. Do not send production secrets or customer data.
What does the included revision cover?
One revision covers a correction if my delivery misses the originally agreed behavior, introduces a regression in the affected flow, or omits promised findings. A new issue, feature, environment, or workflow is separate scope.
Can you handle a larger fix or multiple issues?
Yes. Larger fixes and additional issues require separate scope. After the initial diagnosis, I can send a custom offer for the additional implementation.
What does extra-fast delivery change?
It moves the deadline to one day after complete requirements are submitted and gives the order queue priority. It does not add debugging time or guarantee resolution.
