LeetCode API Explorer
A local-first project page for exploring API design, problem metadata, caching, and developer-friendly documentation.
Next.jsTypeScriptAPI design
Engineer / writer / restless maker
Swetankmakes ideas move.
Formal verification, systems, and useful experiments, shaped into work you can actually explore.
24useful posts targeted for year one
6project writeups with demo and source proof
/studiosecured content editing route
0extra hosting cost for the first version
Projects / selected
Things built with fingerprints.
Each project keeps the reasoning visible: problem, constraints, experiments, outcome, and what changed after the first attempt.
Formal Bits Notebook
A structured public notebook for assertions, SVA patterns, proof attempts, and verification learning trails.
SystemVerilogSVAWriting
Focus areas
A portfolio organized around evidence.
Different mediums, one habit: make the thinking inspectable.
Formal verification
Assertions, proof attempts, debugging notes, and hardware learning paths.
Systems writing
Short technical essays that make design tradeoffs and failure modes explicit.
Developer tools
Small utilities, APIs, and experiments that are useful enough to run locally.
Learning logs
A public trail of what I am building, studying, and improving right now.
The lab
Ideas before they learn to sit still.
Small demos, APIs, snippets, and tools before they become polished project case studies.
Enter the labA hidden fast lane
Jump anywhere without breaking the spell.
The command palette keeps every page, post, and project case study within immediate reach.
YouTube / latest
Proof, demos, and ideas in motion.
Short visual explanations for ideas that deserve more than a paragraph and less than a full course.
ShortRetries Can Make Your Outage Worse
Retries are meant to improve reliability, but during an outage they can multiply traffic and prevent an API from recovering. This visual short explains retry storms, temporary failures, capped attempts, exponential backoff, jitter, and retry budgets.
retry stormretry storms explainedexponential backoff
Watch on YouTube 
ShortWebSockets Are Not Always Better
WebSockets are powerful, but they are not always the right choice. This visual short compares polling and WebSockets: how polling checks for updates, how WebSockets push data over a long-lived connection, and when each approach makes sense.
websocketspollingwebsockets vs polling
Watch on YouTube 
ShortWhy Payment APIs Don't Charge You Twice
Two identical payment requests can reach an API at almost the same time. Without protection, both may create an order or charge the user. This visual short shows how idempotency keys, automatic retries, and an atomic database claim ensure one operation produces one saved result.
idempotencyidempotency keyidempotency keys explained
Watch on YouTube Blog
Notes worth returning to.
What is formal verification?
A plain-language starting point for proofs, assertions, state spaces, and why bugs hide in hardware designs.
System design notes: rate limiter
Token bucket, fixed window, sliding window, and the tradeoffs that matter when the service grows.
Why I bought swetank.dev
A short positioning note for the site: portfolio, technical blog, project demos, and experiments under one developer identity.