Role & responsibilities

Must Have
- JavaCard applet development: 8+ years of total engineering experience with at least 3 years of dedicated JavaCard applet development shipped to production secure elements.

GlobalPlatform Card Specification (GP 2.x or 2.3.x): hands-on experience with secure channel protocols, card content management, and applet lifecycle management.

ISO 7816 APDU protocol: proficiency in command/response design and implementation, including status words and extended APDUs.

JavaCard 3.0.x platform: practical command of JCRE runtime, package structure, persistent/transient object management, and cryptographic API (javacard.security, javacardx.crypto).

Payment credential personalization: experience with key injection, key diversification algorithms, and personalization script generation for production SE deployments.
- EMV contactless payment flows: understanding of how secure element applets interact with terminal infrastructure at point of sale.
- Constrained hardware engineering: ability to work within JavaCard memory limits, transaction atomicity requirements,



and applet sizing constraints.

Nice to Have

iOS Core NFC (NFCTagReaderSession, NFCISO7816Tag): familiarity with how an iOS host application sends ISO 7816 APDU commands to SE-equipped hardware; understanding of the host-side of the tap-to-pay interaction.

Swift or Objective-C: basic reading familiarity sufficient to collaborate with the iOS team on integration points and debug APDU exchange issues end-to-end.
- M/Chip, Visa payWave, or equivalent contactless payment network specifications.
- GlobalPlatform Trusted Execution Workplace (TEE) experience in addition to SE.
- JavaCard test frameworks and applet simulation environments such as jCardSim.
- Payment network certification processes: EMVCo or equivalent scheme certification exposure.
- Location flexibility: willingness to work from or relocate to Pune or Bangalore, India.

Preferred candidate profile

Interested candidates ca

📌 JavaCard / Secure Element Engineering Consultant (Pune)
🏢 Wroots Global
📍 Pune