Chidi Okonkwo
Web Application Development
Next.js MVP build — from figma to deployed in three weeks
Works with TypeScript, PostgreSQL
from$1,200.00
1 / 3
Refresh-token rotation with reuse detection, TOTP, WebAuthn and a device list.
Developers who work with TypeScript, Express, NestJS and take scoped work with a fixed price and delivery date.
Web Application Development
Works with TypeScript, PostgreSQL
Session handling that survives a security review. Opaque refresh tokens with rotation and family-based reuse detection, argon2id password hashing with tuned parameters, TOTP and WebAuthn factors, recovery codes, step-up authentication for sensitive routes, and a device list users can actually understand. Framework-agnostic core with adapters for Express, Fastify and Next.js.
Reuse detection
Presenting a rotated-away token revokes the whole family. That is the only reliable signal that a token leaked.
Step-up authentication
Mark a route sensitive and it requires a fresh factor, with the timeout configurable per route.
Tuned argon2id
Parameters chosen against a real latency budget, with a rehash-on-login path when you change them.
Device list
Named devices, last-used timestamps and a revoke button that works immediately.
4.2
9 reviews
9 verified
Consulting
Works with PostgreSQL
API Integration
Works with TypeScript
Source Code
Availability, buffers, time zones and no double bookings, ever.
Source Code
Auth, organisations, seats, Stripe billing and a migration path. Deploy this afternoon.
Script
Build, test, scan, sign and deploy, with caching that actually hits.
API
Issue, send, chase and reconcile invoices over a clean REST API.
Developer Tool
VPC, EKS, RDS, observability and the IAM boundaries, in modules you can read.
Asked a question on a Sunday and had a useful answer on Monday morning. That alone was worth the price.
26 found this helpful
Everything worked except one migration that needed a manual tweak on Postgres 17. Seller answered within the day.
20 found this helpful
Dropped it into a client project, rebranded it, delivered early. The structure made that easy rather than painful.
28 found this helpful
I bought a competing product last year for twice the price. This one is smaller and better.
28 found this helpful
It is a starting point, not a finished product, and it is honest about that. Saved me the boring fortnight.
21 found this helpful