FinTech / Web3

Larecoin Web3 Payments Platform

Decentralized payments ecosystem on Solana — non-custodial wallets, DEX swaps, merchant portals, NFT receipts, and a global crypto classifieds marketplace.

Crypto Fintech Startup32 weeksFinTech / Web3
DeFiBlockchainCryptoWeb3Solana
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Larecoin Web3 payments dashboard showing crypto wallet and DEX swap interface
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Larecoin set out to build a comprehensive Web3 payments network bridging DeFi and everyday commerce. The platform integrates non-custodial wallets, P2P exchanges, staking pools, a merchant checkout portal, and a global classifieds board — all powered by the LAR token on Solana.

Larecoin Web3 payments dashboard showing crypto wallet and DEX swap interface
Larecoin Web3 payments dashboard showing crypto wallet and DEX swap interface

A proprietary Layer 1 blockchain explorer (LareScan) and ISO reseller program extend reach into traditional financial institutions.

Regulated flows need legal review of copy and data retention before UI freeze — retrofitting disclosures is expensive.

Idempotency and double-submit protection are non-negotiable on any balance-changing endpoint.

Project at a Glance

FieldDetailNotes
CategoryFinTech / Web3Crypto payments, wallets, DeFi platforms, and regulated financial workflows.
Client TypeCrypto Fintech StartupEngagement model
Timeline32 weeksDiscovery through go-live
Focus AreasDeFi · Blockchain · Crypto · Web3 · SolanaPrimary capabilities delivered

Delivered for a crypto fintech startup in 32 weeks — scoped as a fixed-milestone engagement with weekly demos and named owners on both US and Vietnam sides.

Onboarding non-crypto users into Web3 while maintaining the trustless properties DeFi power-users expect created constant product tension.

On-chain transaction volume and LAR token price chart
On-chain transaction volume and LAR token price chart

Settlement finality, KYC/AML compliance across multiple jurisdictions, and integrating 55+ cryptocurrencies required significant smart-contract and backend protocol work.

Reconciliation beats clever architecture — if finance cannot match reports to bank exports, the platform loses trust.

Fraud and risk rules should be tunable without deploys when possible; operations needs levers during incidents.

js frontends connected to Solana smart contracts, with a full LareScan blockchain explorer, LAR/LUSD liquidity pools, QR contactless POS for physical merchants, and push-to-card services that bridge crypto to Visa prepaid cards.

Larecoin mobile wallet with QR contactless POS
Larecoin mobile wallet with QR contactless POS

Every transaction generates an NFT receipt stored on-chain, and the Larecoin Foundation routes a share of fees to global charity partners.

Audit logs are a feature: who changed limits, approved transfers, or exported PII must be queryable.

Staging must never point at production payment keys — enforce with CI checks and separate secrets namespaces.

We measure success against baselines agreed in discovery — not vanity metrics added after launch. The table below captures headline numbers; narrative outcomes follow for stakeholder reviews.

Key Metrics

MetricResultContext
Active reseller partners500+Measured post-launch
Charity meals provided1.24M+Measured post-launch
Transaction settlement< 1 secMeasured post-launch

Business Outcomes

  • Merchants accept crypto payments in-store, online, and in the metaverse via QR contactless POS.
  • NFT receipts are auto-generated for every on-chain transaction — enabling tax efficiency and audit trails.
  • Larecoin Foundation routes a share of transaction fees to hunger and global reforestation charity partners.

Latency SLAs matter on trading and wallet surfaces — measure p95 and p99, not averages alone.

Incident comms templates should be pre-approved by client compliance.

Decentralized payments ecosystem on Solana — non-custodial wallets, DEX swaps,

Merchant portal and liquidity pool staking interface
Merchant portal and liquidity pool staking interface

merchant portals, NFT receipts, and a global crypto classifieds marketplace.

Built with fintech / web3-appropriate tooling — production-tested across Kan-Tek client squads. Choices favor maintainability and integration fit over novelty.

Core Stack

LayerToolsRationale
ApplicationReact · Node.js · SolanaUser-facing and API surfaces
Data & InfraRust Smart Contracts · PostgreSQL · Redis · WebSocketsPersistence, cache, and ops

Full Stack

  • React
  • Node.js
  • Solana
  • Rust Smart Contracts
  • PostgreSQL
  • Redis
  • WebSockets

Choose vendors with clear PCI or SOC postures and document shared responsibility boundaries.

Plan for manual review queues when automation confidence is below threshold.

Run through this checklist before go-live — assign an owner for each item and block the release window until sign-off. Skipping steps because of deadline pressure is how production incidents start.

Pre-launch gates

  • Complete security review on auth, session, and PII field handling.
  • Reconcile ledger or balance reports against source-of-truth exports.
  • Test idempotency keys on all money-moving API endpoints.
  • Verify regulatory copy and disclosure placement with client legal.
  • Run fraud-rule dry run on historical transaction sample.
  • Confirm monitoring alerts for anomaly thresholds with named owners.