Senior Python / backend engineer · US & Canada hours
I make AI-era and money-critical code production-safe.
The hard parts other people skip: OAuth and multi-tenant governance, Supabase RLS and authz, webhook idempotency and proration, extraction accuracy under real-world mess. Every offer below ships with a public artifact you can read before you hire me.
No demos, no promises: running code. Pick the problem that matches your job post.
service-role key shipped in the browser bundle
entry corrected 21 Jul 2026: anon key in the browser, service-role client moved server-side.
From vibe-hardening-case-study, where both the broken and the corrected version are public branches. The diff is the pitch.
Five offers. Each one closes a specific kind of job.
Fixed scope, fixed price where it makes sense, hourly where the work is open-ended. Every entry links to a page with a walkthrough, the price anchor, and the code.
MCP server development
$55–75/hrgovernance work · fixed-price per integration
Production MCP servers for your SaaS and business tools: OAuth 2.1, least-privilege scopes, rate limiting, and the multi-tenant governance layer auto-generators can't produce.
2.Vibe-code hardening & audits
$500 fixed audit$40–80/hr hardening
Your Lovable / Bolt / Cursor app shipped fast and left holes: exposed keys, missing RLS, BOLA/IDOR on every route. I find them, prove them, and close them.
3.AI feature retrofit
from $400fixed, per feature
Add one AI feature to your existing SaaS without breaking it: PII redaction, cost caps, eval gates, and zero schema breakage in a real legacy codebase.
4.Stripe billing & Connect
fixed-priceper engagement · test-mode only
The money-touching logic that repels lowest-bidders: proration, dunning, webhook idempotency, Connect payouts, and Chargebee/Recurly to Stripe migrations that don't double-charge.
5.Invoice & document extraction
fixed-pricepipeline build · benchmarked
Custom extraction that survives 5,000 documents, not 5. Field-level confidence, validation rules, a review queue, and a published accuracy benchmark against the naive baseline.
Have a job post that fits one of these?
Send it over with a sentence on the stack and the deadline. I'll reply with the matching artifact, a fixed scope, and a price.
amin.ale.business@gmail.com