// Industries

Fintech & Crypto

Fintech and crypto products demand speed without sacrificing trust. We build trading interfaces, onboarding flows, wallet integrations, and back-office tools with security reviews, audit trails, and performance tuned for volatile markets. Every fintech product we build treats security as a first-class engineering concern, not a checklist at launch. Delivered work includes custody and trading infrastructure built for products including CoinSwitch.

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// Context

Sector challenges we address

Regulatory and KYC requirements that vary across regions and product categories
Low-latency real-time data requirements for trading and market data displays
Complex third-party integrations with banks, payment rails, and exchanges
User trust earned through transparent UX and incident communication
Evolving compliance requirements that require adaptable system architecture
Multi-currency and cross-border transaction handling with compliance constraints

// Solutions

How Simplileap helps

Web and mobile apps with hardened authentication and session management
Exchange and on-ramp integrations, Kraken trading API, Transak fiat on-ramp, and type-safe payment rail layers
Custody and wallet infrastructure, Fireblocks, MPC/TSS patterns, for DeFi and on-chain financial products
Real-time WebSocket dashboards for market data and portfolio tracking
Monitoring and on-call readiness for revenue-critical system uptime
Audit logging and compliance-ready data models for regulatory review

Engagements typically combine discovery workshops, phased delivery, and optional managed services, so your team retains a single accountable partner from roadmap through operations.

// Stack depth

Crypto infrastructure we run in production

This isn't integration-by-documentation, these are systems we operate for live products handling real value:

Custody & wallets

Fireblocks custody integration (vault structures, transaction policy engines, webhook reconciliation), HD wallet architecture, and MPC/TSS-based custody patterns; HSM-backed key management where compliance demands it.

Chain data & nodes

QuickNode streams for TRON and Ethereum: deposit detection, TRC20/ERC20 token discrimination, reorg-safe processing, and idempotent webhook pipelines.

Exchange & on/off-ramp

Kraken exchange API integration for trading flows; Transak integration for fiat on-ramp inside product onboarding.

Transaction infrastructure

Payment rails, multi-currency ledgering, audit-grade transaction logs, and dust/spam filtering verified against native chain APIs.

QuickNode featured Simplileap in their QuickNode Feature Fridays ›, covering our use of Streams and QuickAlerts for real-time transaction monitoring in finance-grade applications.

Full production integration list ›

// Sector proof

Fintech & Crypto | verified delivery from Bangalore

200+ projects · 11+ industries · 30+ yrs combined leadership experience · Startup India DIPP83124

// Case study

WalletConnect dApp with gasless onboarding for a loyalty program

Ethereum ERC-1155 rewards, smart contract events, indexer pipeline, and custodial fallback for non-crypto users.

A retail loyalty consortium wanted on-chain reward badges without forcing all customers to self-custody wallets. Regulatory marketing review required clear opt-in and fiat-equivalent disclosure.
Stack: Solidity ERC-1155 contracts on Polygon; OpenZeppelin AccessControl for minter roles; Next.js frontend with wagmi + WalletConnect v2; The Graph subgraph for redemption history; Fireblocks API for custodial wallet pool.
Problems: RPC rate limits during campaign launch, added Alchemy failover; metadata hosting on IPFS pinned via Pinata with CDN fallback; users rejected MetaMask install, shipped email-magic-link custodial path with export option.

Read full case study ›

Web3 & Blockchain

dApp development, wallet integration, and on-chain data for crypto products.

Smart Contracts

Secure Solidity contracts for DeFi protocols and token products.

API Integrations

Payment gateway, exchange API, and banking integration.

// Company and service positioning

Company and Service positioning is reviewed for production delivery standards by Harsha Parthasarathy (Co-Founder, Strategy & Operations 24+ years IT veteran, IBM, Global Delivery, Program Management) and Keshav Sharma (Co-Founder, Engineering and Lead Architect, Full-stack engineering, product delivery and technical standards).

// Verified entity

Simplileap Digital LLP

// Recognition

Featured in QuickNode Feature Fridays ›

CIN

AAU-8582

Startup India

DIPP83124

Founded

November 2020

Office

Residency Rd, Bengaluru, India

// FAQ

Fintech & Crypto, common questions

Can you integrate Fireblocks or build custody infrastructure?+

Yes, we've integrated Fireblocks custody (vault structures, transaction policy engines, webhook reconciliation), HD wallet architecture, and MPC/TSS patterns in production. Deposit detection runs through QuickNode streams with reorg-safe, idempotent processing for TRC20 and ERC20 assets.

Ready to scope your next initiative?

Share your goals with our Bangalore team. We respond within one business day with a clear path from discovery to delivery.

Start a project ›Engagement models ›See our work ›