Web3 Developer Needed — Crypto Platform (Prototype Ready)
Worldwide
Hey, I'm building AltForge — a multi-chain crypto platform where users can deploy ERC-20 tokens, swap assets, track transactions, and manage their portfolio, all from one dashboard. I'm looking for an experienced Web3 developer to take an already-built, working prototype to a fully launchable product. What's already done: The prototype is complete — frontend and backend both built. Here's what exists: Full UI — landing page, dashboard, send/receive modals with QR codes, swap interface, gas tracker, TX tracker, session manager, portfolio page, settings Real MetaMask wallet connect via ethers.js Node.js + Express backend with JWT authentication, SQLite database, real Etherscan API integration for live gas prices and TX lookups Session management — tracks active devices with location, revoke support Two-tier plan system — Free (1% fee) and Pro (0.4% fee) Deployment configs for Railway/Render already written Supported chains: Ethereum, BSC, Polygon, Fantom, Moonriver What I need from you: Must have for launch: Real wallet balance fetching via Alchemy/Infura — read actual ETH + ERC-20 balances from connected wallet and display in portfolio Real swap execution — the swap UI is fully built, needs 1inch or 0x Protocol API wired in to execute actual on-chain swaps via ethers.js ERC-20 token factory smart contract — so users can create tokens from the dashboard (name, symbol, supply, decimals) On-chain fee collection — platform takes 1% / 0.4% cut on swaps, needs smart contract routing to collect it For launch readiness: Proper invite/access code system — replace hardcoded codes with a real invite management flow Pro plan payment — Stripe or crypto payment gateway for upgrades Security review of auth, API endpoints, and contracts before going public Tech stack: Frontend: Vanilla HTML/CSS/JS (intentional, no framework) Web3: ethers.js 6.x Backend: Node.js + Express, SQLite, JWT Blockchain data: Etherscan API family Smart contracts: Solidity (your area) Hosting: Railway or Render What I'll give you: Full source code immediately Walkthrough call to explain everything Quick responses and clear feedback throughout Test wallet and API keys for development What I'm looking for from you: A couple of relevant Web3 projects you've shipped Rough timeline for the core items above Your rate (hourly or fixed, both fine) Happy to jump on a call anytime to show you the prototype live. Looking forward to it.
- Less than 30 hrs/weekHourly
- < 1 monthDuration
- ExpertExperience Level
$20.00
-
$40.00
Hourly- Remote Job
- One-time projectProject Type
Skills and Expertise
Activity on this job
- Proposals:15 to 20
- Last viewed by client:3 weeks ago
- Interviewing:6
- Invites sent:9
- Unanswered invites:1
About the client
- United Arab Emirates10:43 AM
Explore similar jobs on Upwork
How it works
Create your free profileHighlight your skills and experience, show your portfolio, and set your ideal pay rate.
Work the way you wantApply for jobs, create easy-to-by projects, or access exclusive opportunities that come to you.
Get paid securelyFrom contract to payment, we help you work safely and get paid securely.
About Upwork
- 4.9/5(Average rating of clients by professionals)
- G2 2021#1 freelance platform
- 49,000+Signed contract every week
- $2.3BFreelancers earned on Upwork in 2020
Find the best freelance jobs
Growing your career is as easy as creating a free profile and finding work like this that fits your skills.
Trusted by