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I will audit and fix your slow AWS serverless app dynamodb, appsync, lambda
Tech Lead, Full Stack Engineer, React Go AWS
Tech Lead and Full-Stack Engineer with 5+ years of experience building enterprise systems, SaaS products, and AI applications.
Product-oriented, with strong expertise in React and TypeScript, backend...
About this Gig
Your Amplify or AppSync app was fast with 1,000 records and is unusable with 100,000. That is not a mystery it is a data model that was designed before the growth.
I am a Tech Lead and full-stack engineer based in Tokyo with 5+ years of experience. On a production B2B SaaS used by more than 10 companies, I diagnosed and fixed exactly this: Scan operations where a Query against a key would do, missing global secondary indexes, keys that did not match the real access patterns, N+1 requests in AppSync resolvers, and full datasets loaded into the client with no pagination.
What you get is not a list of generic AWS tips. I read your code, profile the real queries, and tell you which access patterns are wrong and what to change in the order that returns the most for the least risk.
Migrations on a live product are part of the work, not an afterthought: every change comes with a way back if the release goes wrong.
Case study with the full reasoning: https://aligator527.github.io/work/packaging-saas/
Cloud provider:
Amazon Web Services
My Portfolio
FAQ
Will you need production access?
No. Read-only access to the repository and to metrics is enough for the audit. Implementation happens on a branch; you deploy.
Can you promise a specific speed-up?
No, and be careful with anyone who does before seeing the code. I define the measurement with you up front, and report the real before/after.
Is this only for DynamoDB?
The method is the same for any data layer. The deep experience is DynamoDB + AppSync; I also work with PostgreSQL and MySQL.
Can you work with our team instead of around them?
Yes. Code review and explaining the reasoning to your engineers is part of what I do in my day job.
What if the problem turns out not to be the database?
Then the report says so and names what it is. You are paying for the diagnosis, not for a predetermined answer.
