⚠︎ This job is no longer accepting applications.

Be the Candidate They Can't Ignore.

Don't just send a resume; set yourself up so the right work finds you.

  • Look like a pro instantly with a stunning personal brand.

  • Gain instant "Top Ten" status so you aren't just another name in a pile.

  • Wake up to booked meetings instead of "rejection" emails.

Join the Club — Free Forever
Job Closed

Senior Smart Contract Developer – Pet360 (Blockchain, Solidity, EVM)

  • Source: Careerspage
  • Block Sherpa
  • Remote
  • London
  • Full-Time
  • Senior

Job Description

About the Project

We are building Pet360 — the first blockchain-based pet ecosystem in Brazil. 160 million pets, $60 billion market, zero blockchain infrastructure today.

Our Web2 platform is 75% complete. We are now building the Web3 layer from scratch — pet NFT passports, vaccine certificates, smart contract adoptions, and on-chain pet insurance.

We are looking for a Senior Smart Contract Developer to join our team.

What You Will Do

  • Write and deploy Solidity smart contracts (ERC-721 for pet passports, ERC-1155 for vaccine certificates)
  • Implement upgradeable contract patterns (UUPS) for future flexibility
  • Write comprehensive tests using Foundry or Hardhat
  • Optimize gas usage and ensure security best practices
  • Design the on-chain architecture for pet identity, vaccine verification, and insurance claims
  • Work alongside our backend and frontend teams

What We Are Looking For

  • 3+ years of software development experience
  • 1+ year of Solidity and EVM development
  • Strong understanding of ERC-721 and ERC-1155 standards
  • Experience with Foundry or Hardhat
  • Understanding of smart contract security and gas optimization
  • Experience with upgradeable contract patterns (UUPS or Transparent proxies)
  • Professional English proficiency

Nice to have:

  • Experience with multi-chain deployments (Polygon, Ethereum, BSC)
  • Experience with smart contract auditing
  • Experience with IPFS and decentralized storage
  • Experience with AI-assisted development (Cursor, Claude Code)

What We Offer

  • Fully remote — work from anywhere
  • Contract with long-term growth potential
  • 30+ hours per week
  • $70-120 per hour (negotiable)
  • Founding team token allocation
  • Payment in crypto (USDC/USDT) or fiat (Wise/PayPal)

Skills

  • blockchain-com
  • solidity
  • ethereum
  • ipfs
  • Cursor
  • claude-by-anthropic
  • claude-code
  • paypal
This job is no longer accepting applications.

You missed this one - but you don't have to keep missing out. Try Club members get matched with open opportunities before they're gone, so you're always first in line, never last.

Join the Club — Free Forever
Create Free Account & Apply
  • Free personal website
  • Built-in Talent Agent
  • Apply to future jobs in 1 click
  • Get matched to similar roles
or
Apply as a guest this time

You'll apply successfully, but won't be able to track your application, save this job, or get matched to similar roles.

This listing is a publicly available opportunity curated by Try Club to help talent discover relevant roles. Try Club is an independent platform and is not affiliated with Block Sherpa

Get Similar Jobs

Browse more similar roles on TRY and find your perfect match.

Show Me Similar Jobs

Stop Searching. Start Thriving.

Why waste time chasing leads when the perfect projects can find you?
With TRY, clients actively searching for professionals with your skills can discover you in seconds. Whether it's a quick gig or your dream role, we connect you with opportunities that matter.

  • Get found faster
  • Let projects come to you
  • Build a career on your terms

Take control of your career today.

Claim Free Website in 2 Minutes