Secure Authentication Systems
Authentication built to modern security standards, covering session management, password handling, MFA, and the edge cases that off-the-shelf tutorials skip.
Secure Authentication Systems
- req/s, zero deadlocks
- 15Kreq/s, zero deadlocks
- double-charges in production
- 0double-charges in production
- production systems shipped
- 10+production systems shipped
- years building for clients
- 7+years building for clients
Signs you need this now.
Authentication is one of the few parts of a system where a small mistake, like a token that never expires or a password reset flow with a guessable link, becomes a serious breach rather than a minor bug. Most auth code is copied from a tutorial that never covered token rotation, rate limiting, or session invalidation. Getting it wrong doesn't fail loudly, it just quietly leaves the door open.
Nobody's confident the auth system is actually secure
It was built quickly early on, copied from a tutorial or scaffolded by a starter kit, and nobody has reviewed it against real security practices since. The team avoids touching it because they're not sure what else might break or what's already been quietly exposed.
Sessions never really expire
Tokens are long-lived with no refresh or revocation strategy, so a stolen token or an employee who left the company months ago could still technically have valid access. There's no clean way to force a logout across devices when it matters.
A password reset flow has an obvious hole
Someone on the team noticed the reset link doesn't expire, or the token is too short to resist brute forcing, but fixing it means understanding a flow nobody fully remembers building. It sits on the backlog because touching auth code feels riskier than leaving it broken.
What you get.
Secure credential handling
Passwords hashed with bcrypt or argon2, never logged or stored in plaintext anywhere in the system, with rate limiting on login attempts to block brute-force attacks.
Proper session and token management
Short-lived access tokens with a refresh token rotation strategy, so sessions can be revoked, expired, or invalidated across all devices when needed instead of living forever.
Multi-factor authentication support
TOTP-based or SMS/email MFA added where the risk profile calls for it, implemented as an integrated part of the login flow rather than a bolted-on afterthought.
Secure password reset and email verification flows
Time-limited, single-use tokens for resets and verification, with the edge cases handled: expired links, reused tokens, and enumeration attacks that reveal whether an email exists in your system.
Social and SSO login integration where needed
OAuth providers like Google or Microsoft, or enterprise SSO via SAML/OIDC, integrated cleanly alongside your existing credential-based login rather than as a separate parallel system.
A security review of the finished implementation
The completed auth system is checked against OWASP authentication guidelines before handoff, so you have a documented baseline instead of just trusting it works.
Four steps, no mystery.
Quick scoping call
A short call (or async over WhatsApp) to understand what you're working with and what "done" actually looks like for you.
Fixed scope, no surprises
A clear written plan of what's included and how long it takes, before any work starts.
The actual work
Progress you can see, not a black box. You get updates as milestones land, not just a status report at the end.
Handover
Everything documented and handed over cleanly, with a walkthrough so your team isn't stuck waiting on me for routine changes.
You might also need.
Frequently asked.
Yes, a security review of the current implementation is often the right starting point, identifying specific gaps like token handling or missing rate limits before deciding what needs to be rebuilt versus patched.
Tell me what you're dealing with.
Send a message and get a real reply within 24 hours, not an automated sequence.
Or WhatsApp directly, same link as above