Available for new projects
I build Web3 products that ship.
I am KutluhanETH. I design, build and ship Web3 apps and developer tools end to end in TypeScript and Next.js, and I contribute fixes upstream to the infrastructure I build on.
- Web3 product engineer
- Developer tools
- TypeScript and Next.js
- Open source contributor
Featured work
Four products running on Arc, Rialo and Monad testnets and Solana devnet, plus a career tool. Every one is live and ready to try.
Dueline
Arc testnet app
Lock test USDC across dated milestones. Once a date passes, any wallet can release the payout to the recipient, and keeper tips make sure someone does.
Open
Sealworks
Rialo testnet suite
Everyday apps for deposits, rentals, farm boxes and royalty splits, where Rialo pays out on time without anyone pressing a button.
Open
Solana Agent Desk
Solana devnet console
Ask Solana devnet a question in plain words and get an answer with a SHA 256 receipt for every RPC call.
Open
Monad Agent Desk
Monad testnet lab
Read blocks, gas, balances and contracts on Monad testnet, with a verifiable receipt for every call.
Open
Job Hub
Career tool
A hand picked index of 158 job boards that builds a personal search plan around your role and region.
OpenRialo ecosystem
Sealworks is my community project on Rialo testnet. Four small apps share one escrow program, and Rialo itself sends each payment when the deadline arrives.
Built independently by a community member, using test funds only.
The hub that maps the whole suite and its onchain proofs.sealworks.kutluhaneth.comSealworks
Visit deposits that return when the patient shows up.clinicdesk.kutluhaneth.com
ClinicDesk
Rental deposits that pay the shop when gear comes back late.gearlock.kutluhaneth.com
GearLock
Prepaid farm boxes that refund members if a delivery is missed.harvestbox.kutluhaneth.com
HarvestBox
Song royalty splits that pay every writer their exact share.choruspay.kutluhaneth.com
ChorusPay
The shared deadline desk behind ClinicDesk, GearLock and HarvestBox.deadlinedesk.kutluhaneth.com
DeadlineDesk
Developer tools
Twenty single purpose tools that cut real engineering chores down to seconds. Most run entirely in your browser.
Web and network7
Find broken links before your visitors dodeadlinks.kutluhaneth.com
Dead Link Scan
Trace every redirect hop by hopredirects.kutluhaneth.com
Redirect Trail
Find where your contact form loses leadsformleak.kutluhaneth.com
Form Leak
Compare your nameservers with six public resolvers during a cutoverdnsdrift.kutluhaneth.com
DNS Drift
Track TLS expiry, names and chains across your hostscertwatch.kutluhaneth.com
Cert Watch
Decode 429 headers and draft the reply to your customerratelimit.kutluhaneth.com
Rate Limit Story
Find out why your webhooks failedwebhooks.kutluhaneth.com
Webhook Morgue
Data, money and security8
Check whether scheduled jobs really rancron.kutluhaneth.com
Cron Truth
Check a partner CSV against your column contractcsvguard.kutluhaneth.com
CSV Guard
Reconcile bank payments with invoicesinvoices.kutluhaneth.com
Invoice Match
Compare staging and production env files safelyenvdiff.kutluhaneth.com
Env Diff
Find leaked keys in a paste before you share itsecrets.kutluhaneth.com
Secret Scan Lite
Find double charges and key misuse in your API logsidempotency.kutluhaneth.com
Idempotency Ledger
See who can touch what before an access reviewpermissions.kutluhaneth.com
Permission Map
Sort email bounces and complaints, build a suppression listbounces.kutluhaneth.com
Bounce Inbox
Product and support5
Turn a messy support thread into a clear incident timelinesupport.kutluhaneth.com
Support Timeline
Find the feature flag change that caused the spikeflags.kutluhaneth.com
Flag Autopsy
Forecast usage, breach date and overage cost before the invoicequota.kutluhaneth.com
Quota Breach
Find missing and broken translations before releaselocales.kutluhaneth.com
Locale Gaps
Find the onboarding step where new users leaveonboarding.kutluhaneth.com
Onboarding Drop
Open source
Merged pull requests in Web3 infrastructure projects. Every link opens the exact change that landed.
- CircleRust
Arc node
3 merged
- MidenTypeScript
Miden web SDK
3 merged
- MidenRust
Miden VM
2 merged
- MidenRust
Miden node
1 merged
- MidenDocs
Miden docs
1 merged
- FhenixReact
CoFHE SDK
1 merged
- AlloyRust
Alloy examples
1 merged
- Sigma PrimeRust
Lighthouse
1 merged
- AnzaRust
Agave
1 merged
- HieroJavaScript
Hiero JS SDK
1 merged
- TempoRust
MPP Rust SDK
1 merged
- ACKTypeScript
Agent Commerce Kit
1 merged
Have a product to ship? Let's talk.
I take on product engineering roles and project work in Web3 and developer tooling, from first prototype to production launch. Send your idea and timeline by email or on X, and I will reply with a concrete plan.