I build systems —
and teach how they're designed.

I'm Abhinav Kumar Singh, a software engineer at Amazon. Four years of shipping backend services, security dashboards, and AI products — now sharing the system design and interview craft behind it all.

SDE II @ Amazon 4+ yrs experience Mentored 50+ individuals

fig. 01 — this site, as a high-level design. nodes are clickable.

client you https · 443 gateway abhinavdev.com status: 200 OK my-story-svc GET /story experience-svc GET /work system-design-svc GET /hld writeups-svc GET /loops mock-interview-svc POST /book

Pick a service.

5 healthy · 0 degraded

My Story

From a Thapar classroom to Amazon — four years of security, platforms, and AI.

GET /story →

Experience

Amazon, ServiceNow, F5 — the systems I shipped and the numbers they moved.

GET /work →

Let's Do System Design

A course built on one six-step framework, from requirements to deep dives.

GET /hld →

Interview Experiences

Round-by-round write-ups of real loops — what was asked, what was scored.

GET /loops →

Mock Interviews

Paid 1:1 sessions for DSA, HLD, and LLD — with a written scorecard.

POST /book →