Example projectWeb appWeb3
Portable seller reputation
Hypothetical. Not a client, not a result.
// The problem
Freelancers on a niche skills marketplace lose their ratings when they move between platforms, and new sellers struggle to prove their track record.
// What we would build
Completed jobs and ratings issued to sellers as verifiable records on a public chain, which they can show anywhere and which no platform can quietly delete. Buyers check a seller's record without a wallet. If your sellers only ever work on your marketplace, a database is simpler, and we will say so.
// What is in it
- Completed jobs and ratings issued as verifiable records
- Sellers show their record anywhere
- Buyers check a record without a wallet
- No coins and no payments on chain
- Contracts audited before launch
// Stack
- Next.js
- Solidity
- Base
- PostgreSQL
- AWS
// estimate
- Build
- ≈ US$67,800 to US$104,000, delivered within 20 weeksCAD 96,500 to 147,600
- Hosting
- ≈ US$176 a monthCAD 250 a month
- Support
- ≈ US$1,000 a monthCAD 1,425 a month
Prices in your currency are estimates from today's Bank of Canada rate. All invoicing is in CAD or USD.
Timeline by milestone
- Discovery
- 2.9 to 3.4 weeks
- Specification
- 0.4 weeks
- Design approved
- 2.4 to 4.4 weeks
- Core features
- 1.4 to 1.9 weeks
- Full build
- 0.9 to 1.4 weeks
- Contracts and tests
- 1.4 to 2.9 weeks
- Testing and fixes
- 0.4 weeks
- Testnet deployment
- 2.9 to 3.4 weeks
- Launch
- 0.9 to 1.4 weeks
- Mainnet
- 0.9 to 1.4 weeks
Outside our hands, and added to the calendar
- An outside audit of the contracts, if you want one
- 2 to 4 weeks
- An account with your identity verification provider
- 1 to 4 weeks
How it is paid
- Deposit 20%
- CAD 19,300 to 29,520
- Discovery 3.5%
- CAD 3,377.50 to 5,166.00
- Specification 6.3%
- CAD 6,079.50 to 9,298.80
- Design approved 3.5%
- CAD 3,377.50 to 5,166.00
- Core features 10.5%
- CAD 10,132.50 to 15,498.00
- Full build 7%
- CAD 6,755 to 10,332
- Contracts and tests 19.1%
- CAD 18,431.50 to 28,191.60
- Testing and fixes 3.5%
- CAD 3,377.50 to 5,166.00
- Testnet deployment 6.3%
- CAD 6,079.50 to 9,298.80
- Launch 3.5%
- CAD 3,377.50 to 5,166.00
- Mainnet 6.8%
- CAD 6,562.00 to 10,036.80
- Holdback, 30 days after launch (10%)
- CAD 9,650 to 14,760