Manav

built TempFS, temporary file sharing service - upload a file, set a use limit and expiry, get a link - no account needed for guest uploads; pro tier adds password-protected links - share via email - server never touches your file bytes, direct browser-to-R2 via presigned URLs

Stack: Next.js · Supabase · Cloudflare R2 · Resend · Razorpay Live Link: tempfs.0xradioactiv.xyz Link to the repo: github.com/0xRadioAc7iv/t…

how it works: - upload: browser → presigned PUT → R2 directly; server only stores metadata - download: one Postgres query atomically checks expiry, verifies password, claims the use - no cleanup job, R2 TTL handles deletion, expired links blocked at the app layer

built TempFS, temporary file sharing service - upload a file, set a use limit and expiry, get a link - no account needed for guest uploads; pro tier adds password-protected links - share via email - server never touches your file bytes, direct browser-to-R2 via presigned URLs

Going through a tough time. Actively looking for work. Last 6 months: → Merged PRs in @better_auth @appwrite @mintlify @umami_software → 150+ GitHub stars, 4K+ npm downloads → Shipped 10+ products app Frontend & Product Engineer. 3+ yrs. Available now. DM or retweet. 🙏

i've been reading agave's source code for a few weeks and have now started building toy versions of different components for fun with gossip being the first. it has: - bloom filter with fnv hashing - crds table with conflict-free timestamp resolution - gossip protocol messages over udp - multi-node convergence across gossip rounds i might also come up with @solana 's own version of "build your own x" lol link to the repo below:

and with that, i'm now open to work. remote only. internship, contract, part-time, or paid trial. anything works. --- about me: 18. first-year CS student. got into systems and infra in october 2025. haven't stopped since. primary languages: Rust and Go. C/Python/TS when needed. --- things i've built: Rust: > Arbx: autonomous MEV arbitrage engine. 186 tests, 17ns AMM calculation, $31 mainnet budget. launching april 2026 > Shadow Index: Reth ExEx Ethereum indexer. 4.08ms latency, 71k tx/sec (dm'd by @gakonst after this post) > Mempool Sniper: event-driven Ethereum mempool monitor. <500ms detection latency > Rusty Redis: Redis clone. 1.4M+ ops/sec > Merkle Trie: Ethereum MPT implementation. O(1) state verification > Cold CLI: HD wallet generator. zeroizes RAM on drop Go: > Orion: distributed container orchestrator. self-healing cluster in under 2 seconds > Aether: distributed SQL database. Raft consensus, Postgres wire protocol > CrisisMesh: offline-first mesh network. guaranteed delivery during partitions > VelocityCache: remote build cache. 231x faster than Turborepo (at local cache restoration) > Prism: serverless, instant database branching under 300ms for any PostgreSQL C: > lithos: LSM-tree storage engine. 72k+ writes/sec, 97k+ reads/sec. MVCC. --- open source (merged): > token-2022 (Solana) > anchor (Solana, approved) > CometBFT (3 merged, 3 open) > cosmos-sdk > Gaia > Sovereign SDK --- wrote 4 technical deep dives. MEV, Ethereum Merkle Trie, Redis, and LSM-trees. --- looking for: systems, protocol, or blockchain infra. backend works too. Rust or Go. remote only. not looking for: frontend, full-stack, anything off the metal. --- DMs are open or mail at bit2swaz@gmail.com github: github.com/bit2swaz portfolio: bit2swaz.vercel.app blog: bit2swaz.vercel.app/blog

was reading about amazon's S3 bucket and object storages so i built frusta , my S3 styled manual chunk upload engine - out of order+ parallel chunk acceptance - resume and stream fail logic for chunk uploads - idempotent file writes/db writes - atomic renaming from temp to final folder (check docs) - merge failure handling - node pipelines for reqStream,writeStream and merge w backpressure-safe transfer - explicit upload states (init/uploading/completing/completed/failed) - feature based scalable architecture and middlewares - also learnt about testing (23+6) and benchmarks (k6) along the go [repo link in comments]

@farhatkadiwala_ exactly, it's sooo soothing.

@radioac7iv right?? it's like sigh of relief, just louder lmao

this keyboard was too good not to build a typing test. sounds, haptics, and all. go try and show me how well you score type.faru.sh

tired of outdated startup job boards? I built an interactive map that shows every fresh startup role in blr - it auto updates itself every 72 hours automatically - and it's fully free to use, no login required

@farhatkadiwala_ @vrajdesai78 Well written! been struggling with this for a few weeks now and still have no idea lol but excited for what comes next

@0xSarthak13 🫡

@radioac7iv man is back in action🫡

yo, built a TOTP authentication service. It works with any authenticator app (Google, Microsoft, etc.) it implements RFC 6238 (extension of RFC 4226) to generate HMAC - based OTPs, derived from fixed time steps.

find the repo here: github.com/0xRadioAc7iv/t…

features & security: - secrets never persisted in plaintext - AES-GCM encrypted secret storage - per-user multi-device enrollment (max 3) - replay protection via last accepted timestep of OTP

CPUs are getting worse. We’ve pushed the silicon so hard that silent data corruptions (SDCs) are no longer a theoretical problem. Mercurial Cores are terrifying because they don’t hard-fail; they produce rare, but *incorrect* computations!

I built my own graphics library and got a whole map of my city onto a device with only 64kb of free RAM using my own rendering method written entirely in C & assembly, and a converter that take GeoJSON files and compresses them - this one went from 5mb to 34kb in my proprietary binary format, uses linedraw vector rendering to keep the entire memory buffer at only 8kb of RAM whilst tiling larger maps In short Screw google, aint no reason maps needs to be gigabytes of RAM to use

@farhatkadiwala_ mere handwriting ka font kaha se mila?

guess what's written there

link to the repo, if you're interested: github.com/0xRadioAc7iv/s…

it's 2026 and windows still doesn't have a proper screen time tracker so i built my own. - lightweight (~60mb memory) - auto start at startup - stats (daily/last week/month/3 months) - daily limit notifications (so you can touch grass) vibe-coded in golang