Software Engineer – Web3 Developer

Company Summary

Belmont73 AI is at the forefront of Web3, AI, and decentralized social media innovation. Our mission is to empower users by leveraging AI and blockchain technologies to create the next generation of digital interactions. We believe in a creator-first economy, where users have full ownership of their data and monetization potential. Our projects integrate Web3 decentralized finance (DeFi), AI-driven engagement models, and tokenized ecosystems to reshape how individuals connect, share, and earn. Belmont73 AI is dedicated to pioneering the future of social media, referral economies, and AI-powered content discovery through decentralized solutions.

Position: Web3 Developer (Blockchain & Payments Architect)

Location: São Paulo, Brazil, or Remote
Contract Type: Full-time or Part-time Contract
Compensation: (Based on Experience)

About the Role

We are building a next-generation Web3-powered referral system integrated into a social media platform.  We are seeking a highly skilled Web3 Developer who can architect and develop the blockchain & payments infrastructure to power this feature.

The ideal candidate should have experience with smart contracts, blockchain rewards, Web2 payment gateways (Stripe, PayPal), and decentralized data storage. A background in social media integrations is preferred but not required.

Responsibilities

  • Architect and Develop a referral system that supports both Web3 and Web2 payment mechanisms.

  • Implement smart contracts for referral tracking and tokenized rewards (Ethereum, Polygon, or Solana).

  • Integrate fiat payment solutions using APIs like Stripe, PayPal, or Wise

  • Develop decentralized storage solutions for referral tracking (The Graph, Ceramic, or IPFS).

  • Ensure secure and scalable architecture that can handle millions of referrals and payments.

  • Optimize the system for social media sharing, ensuring seamless QR code generation and tracking.

  • Collaborate with AI & frontend teams to integrate referral analytics and engagement insights.

  • Perform security audits on smart contracts and ensure compliance with Web3 security best practices.

  • Stay updated on Web3 trends and identify opportunities for improving the referral system.

Requirements

  • 3+ years of experience in Web3/blockchain development (Solidity, Rust, or Web3.js).

  • Strong experience in smart contract development (Ethereum, Polygon, Solana, BSC).

  • Proficiency in integrating Web2 payment systems (Stripe, PayPal, Wise API, etc.).

  • Experience with QR code generation & tracking systems.

  • Familiarity with decentralized storage protocols (IPFS, Ceramic, The Graph).

  • Backend development skills (Node.js, Express.js, Firebase).

  • Understanding of social media APIs (Meta, TikTok, Twitter, or WeChat APIs preferred).

  • Security expertise in smart contracts (audit experience is a plus).

  • Ability to work independently and architect scalable solutions.

Preferred Qualifications

  • Experience working on Web3 referral or affiliate programs.

  • Familiarity with NFT or tokenized reward systems.

  • Background in social media engagement & growth hacking.

  • Contributions to open-source blockchain projects.

Work authorization:

Must be authorized to work in the country which the candidate applies. Belmont will not sponsor applicants for employment visas.

EEO Statement:

Belmont73 AI is an equal opportunity employer that is committed to diversifying its workforce

Belmont73 AI does not to discriminate against any applicant for employment, or any employee because of age, color, sex, disability, national origin, race, religion, or veteran status.

The statements contained in this document are intended to describe the general nature and level of work being performed by a colleague assigned to this description. They are not intended to constitute a comprehensive list of functions, duties, or local variances. Belmont73 management retains the discretion to add or to change the duties of the position at any time.

Submit applications below or to careers@belmont73.ai

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