Web3 & Smart-Contract Developer (Co-Founder/Partner)

June 24, 2026

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Seeking a Web3 & Smart-Contract Developer (Co-Founder/Partner) – ideally UK Based but open to non UK applicants.

Are you passionate about blockchain, tokenomics, and sustainability? Do you dream of building products that merge fashion, finance, and real-world impact? If so, TSOMB (The Shirt On My Back) wants you. We’re on a mission to democratize crypto investing through a tangible, eco-friendly wearable—a cold-storage crypto wallet woven into a t-shirt—and we need a technical co-founder to bring the vision to life.

About TSOMB

TSOMB Ltd. is a London-based startup creating the world’s first fully sustainable, tokenized wearables. Each TSOMB T-shirt:

Holds a cold wallet: The private key is securely embroidered inside; the public key is accessible via a wash-safe QR label and PVC card tag.
Embodies sustainability: Organic cotton, recycled packaging, and a pledge to plant one tree per shirt.
Tokenizes equity: Every shirt comes with TSOMB Vested Tokens (equity in TSOMB) stored in the embedded wallet; dividends are paid in TSOMB Hedge Tokens.
Connects community to finance: We’re launching our first 600 proof-of-concept shirts via Kickstarter and plan to expand into hoodies, caps, and home goods—all embedding cold-storage wallets and tokenized equity.

Our long-term vision is a dual ecosystem: a sustainable fashion brand and a community-driven hedge fund, powered by wearable tokens. We want everyday people—tech-savvy and non-tech alike—to own a piece of the company simply by wearing a t-shirt.

Why Join TSOMB as a Technical Co-Founder?

Equity Ownership: Meaningful equity share through our TSOMB Vested Token model.
Innovative Product: Shape the world’s first fashion-integrated cold-storage wallet.
Purpose & Impact: Help us merge crypto adoption with environmental stewardship (1 shirt = 1 tree).
London Hub: Primarily remote with occasional in-person sprints (co-working space in Shoreditch).
Early-Stage Influence: You’ll define the technical architecture—from smart contracts to CI/CD and security audits.

What You’ll Build & Lead

Smart-Contract & Token Architecture

Design and implement the TSOMB Vested Token (equity token) and TSOMB Hedge Token (dividend token) on Ethereum (ERC-20/ERC-721/ERC-1155/4626 standards).
Define proxy/upgradeable patterns (e.g., OpenZeppelin Proxy, Diamond Standard) for future extensibility (companion app, Chip Phase 2).
Integrate token issuance with our cold-storage method (embedded wallets), enabling registration (public key) and optional custodial flows (private key registration) on-chain.
Build staking/reward mechanisms for tree-planting and community incentives.

Wallet & On-Chain/Off-Chain Integration

Architect the flow for embedding keys into garments (QR labels, embroidered private keys) and linking them to on-chain addresses.
Develop backend APIs (Node.js/TypeScript or similar) to support:
Wallet registration (public key whitelisting, custodial vs. non-custodial logic).
Dividend distribution in TSOMB Hedge Tokens to physical (cold) or registered wallets.
Token exchange: allowing holders to swap Vested Tokens for official company shares after 1 year.
Collaborate with front-end developers (React + Web3 libraries: ethers.js, wagmi, Onboard.js) to build a TSOMB Companion App:
QR-based wallet top-ups (integrate with Coinbase/Revolut/other rails).
Real-time balance and dividend tracking.
Tree-planting impact dashboard (web3-verified).

Security, Testing & Audits

Implement robust unit testing (Hardhat/Truffle, Waffle) and fuzz testing (Echidna).
Integrate Slither/MythX in CI pipelines for static analysis.
Manage external audits and coordinate bug bounty programs.
Ensure GDPR-compliant data handling for registered users.

Future Migrations & Phase 2 R&D

Architect smart contracts for the optional Crypto Garment Chip (NFC/QR-based on-garment interactions).
Plan for multi-chain expansion (Polygon, BSC, Solana/Rust, Polkadot/Ink) as we add new token types and lower gas fees.
Build modularity to support future products (hoodies, home wear) embedding wallets.

Who We’re Looking For

Solid Blockchain Background: 3 + years of professional smart-contract development, with public repositories or live dApps.
Deep Solidity Expertise: ERC-20, ERC-721, ERC-1155, ERC-4626; upgradeable patterns (proxy, diamond); gas optimization; security best practices.
Full-Stack Web3 Skills: Comfortable integrating front-end frameworks (React/Vue) with ethers.js/web3.js/wagmi. Experience building companion dashboards or NFT marketplaces is a plus.
Strong Security Mindset: Familiar with Slither, MythX, Echidna, and orchestrating external audits. Able to write thorough unit/fuzz/integration tests.
Product-Focused & Collaborative: You’ll be making architectural decisions, writing documentation, and partnering directly with founders. Excellent communication skills (English) are a must.
London-Based (or Willing to Relocate): Ideally within commutable distance for occasional in-person sprints.

Nice-to-Haves

Rust/Ink experience (for potential Solana/Polkadot expansion).
Familiarity with off-chain indexing (The Graph, Subgraph deployments).
Prior work in wearable tech or IoT (NFC/embedded systems).
Passion for sustainability, fashion, and community-driven finance.

Why TSOMB Is Different

Wearable Wealth: We’re not building another hardware wallet or dApp—we’re embedding cold storage directly into high-quality, eco-friendly garments.
Physical & Digital Equity: Instead of a standard cap table, every shirt is tokenized equity. TSOMB Vested Tokens live in your apparel until you choose to register them—nothing like this exists in fashion or crypto today.
Sustainability at the Core: With every shirt sold, we plant a tree. And soon we’ll manage our own TSOMB Forest Reserves, giving token holders real-time impact metrics.
Early Stage, Massive Potential: We’re just launching our first 600 Kickstarter shirts. Your code will underpin our entire ecosystem—there’s no “throwaway MVP.”

How to Apply

Email info@theshirtonmyback.com
message me on linkedin

Your thoughts on how you’d approach building TSOMB’s token model and cold-storage integration.
Why you’re excited by the intersection of fashion, crypto, and sustainability.

(Optional) Attach or link any demos, blog posts, or write-ups that highlight your Web3 work.

Even if you don’t check every box, if you’re intrigued by building the future of wearable finance, reach out—we’d love to talk.

This is a rare chance to shape a tokenized, eco-friendly brand from day one—and to own a meaningful piece of it.

P.S. Know someone perfect for this role? Please forward this post!

Salary: GBP 48000 - 84000 per year Experience: 5 years required

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