Founder & CTO · Securing Enterprise Systems

Architecting resilience.
Engineering the
secure edge.

Managing Director and CTO leading engineering teams to build robust, scalable backend systems. I architect enterprise platforms from the ground up with security as a first-class concern.

$whoami→Pushp Raj Sharma_

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Pushp Raj Sharma

Security Engineer · Founder

Open to work

[03]Verified deployments

Selected work — built, broken, hardened, shipped.

[05]Cybersecurity journey

From writing code to breaking and defending it.

Honest progress, not certifications-as-trophies. I learn by building deliberately vulnerable systems, then hardening them.

[06]Trajectory

The path so far.

Builder → engineer → security engineer → founder. Each step compounding.

[04]Engineering deep-dives

Case studies — how I think when the stakes are real.

Long-form writeups on architecture, security tradeoffs, and database decisions. Built for engineers who want the actual reasoning, not the highlight reel.

writeup

Refresh-token rotation with theft detection

How I designed an auth flow that detects stolen refresh tokens within a single round-trip — and revokes the entire session family the moment reuse is observed.

Auth flowThreat modelPostgres schema

writeup

Multi-tenant Postgres without performance cliffs

Choosing between schema-per-tenant, row-level isolation, and database-per-tenant. The tradeoffs I picked for an LMS that scaled past 10k concurrent users.

Database designScalabilityRLS

writeup

Designing APIs that survive contact with attackers

Rate limits, idempotency keys, request signing, and structured error envelopes. The defaults I wish every API tutorial taught.

API designSecurityDX

writeup

Edge-first architecture for sub-100ms p99

Moving auth, rate limiting, and cache invalidation to the edge — what works, what doesn't, and where you still need a traditional origin.

PerformanceEdgeCaching

[07]GitHub signal

Commit cadence over the past year.

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[08]Notes & research

Writing.

All posts

[09]Initiate handshake

Let's build secure systems together.

Open to MS research collaborations, security engineering roles, founding-team conversations, and thoughtful intros.

pusprajsharma314@gmail.com github.com/pushp314 www.linkedin.com/in/pushp-raj-sharma/ x.com/pushpa_builds

▸ status

Available for MS interviews and Spring 2026 internships.

Architecting resilience.
Engineering the
secure edge.

The toolchain I think in.

Selected work — built, broken, hardened, shipped.

From writing code to breaking and defending it.

The path so far.

Case studies — how I think when the stakes are real.

Refresh-token rotation with theft detection

Multi-tenant Postgres without performance cliffs

Designing APIs that survive contact with attackers

Edge-first architecture for sub-100ms p99

Commit cadence over the past year.

Writing.

Let's build secure systems together.

The toolchain I think in.

Selected work — built, broken, hardened, shipped.

From writing code to breaking and defending it.

The path so far.

Case studies — how I think when the stakes are real.

Refresh-token rotation with theft detection

Multi-tenant Postgres without performance cliffs

Designing APIs that survive contact with attackers

Edge-first architecture for sub-100ms p99

Commit cadence over the past year.

Writing.

Architecting resilience.Engineering thesecure edge.

The toolchain I think in.

Selected work — built, broken, hardened, shipped.

From writing code to breaking and defending it.

The path so far.

Case studies — how I think when the stakes are real.

Refresh-token rotation with theft detection

Multi-tenant Postgres without performance cliffs

Designing APIs that survive contact with attackers

Edge-first architecture for sub-100ms p99

Commit cadence over the past year.

Writing.

Let's build secure systems together.

The toolchain I think in.

Selected work — built, broken, hardened, shipped.

From writing code to breaking and defending it.

The path so far.

Case studies — how I think when the stakes are real.

Refresh-token rotation with theft detection

Multi-tenant Postgres without performance cliffs

Designing APIs that survive contact with attackers

Edge-first architecture for sub-100ms p99

Commit cadence over the past year.

Writing.

Architecting resilience.
Engineering the
secure edge.