Transak

Transak builds the plumbing that moves real money into crypto wallets. The company provides fiat-to-crypto on-ramp infrastructure - APIs and embeddable widgets - that financial applications integrate to let users buy digital assets without leaving the app. It operates across 125+ countries, supports over 130 crypto assets, and has been integrated into more than 450 applications serving upwards of 10 million users. That's a wide attack surface spanning identity verification, payment processing, and custody-adjacent flows.

The technical stack runs through domains where breaches have immediate financial consequences: KYC verification, risk management, payment processing, and web3 infrastructure. Transak handles sensitive identity documents and banking data at scale while routing transactions across fiat rails and blockchain networks. Compliance is a first-order concern - the company's culture signals emphasize regulatory adherence as core to the product, not an afterthought bolted on for audits. In fintech, that distinction matters.

For security engineers, the threat model is concrete. The company sits at the intersection of traditional finance and crypto, making it a target for credential stuffing, payment fraud, API abuse, and supply-chain attacks against integrated partners. Defending a system that 450+ external applications depend on means thinking about not just Transak's own perimeter but the trust relationships rippling outward to every integration. The work spans securing real-time transaction flows, hardening identity verification pipelines, and maintaining compliance posture across dozens of regulatory jurisdictions simultaneously.