Lead Java Developer

5 - 7 years

0 Lacs

Posted:1 day ago| Platform: Foundit logo

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Work Mode

Remote

Job Type

Full Time

Job Description

Job Title: Sr Java Card / eSIM Applet Developer

Location:

Reports To:

About Telna

Telna provides Mobile Network Operators (MNOs), Communication Service Providers (CSPs), and Original Equipment Manufacturers (OEMs) with a fully managed global cellular connectivity platform. With access to the largest 2G5G and LTE-M coverage from over 800 radio network operators300 of which are direct partnersacross 200 countries, Telna empowers seamless, high-performance connectivity worldwide.

Our global multi-network connectivity platform simplifies integration, offering localized break-out capabilities via cloud infrastructure. With a single integration into Telna's platform, millions of devices are powered by resilient, multi-network connectivityenabling a wide array of innovative cloud-based solutions.

Position Overview

Senior eSIM Applet Developer

You will collaborate with product, platform, and QA teams to design, develop, and maintain Telna's next-generation eSIM applets, ensuring compliance with GSMA, ETSI, and GlobalPlatform standards.

Key Responsibilities

  • Own full applet lifecycle:

    from requirements gathering, design, and development to testing, certification, and release.
  • Develop and maintain Java Card applets

    for SIM, USIM, and eSIM (eUICC) environments.
  • Implement, debug, and troubleshoot applet

    logic on various SIM/eSIM platforms and toolchains.
  • Collaborate with OEMs, chipset vendors, and MNOs

    to integrate and validate applet functionality.
  • Ensure compliance

    with GSMA, ETSI, and GlobalPlatform standards for SIM/eSIM applets.
  • Conduct code reviews, test case design, and performance analysis.

  • Work closely with QA to automate testing and validation in both simulated and real device environments.
  • Prepare and maintain technical documentation (design specs, test plans, release notes).
  • Stay current with advancements in

    eSIM technology, secure element design

    , and

    Java Card platform updates.

Required Qualifications

  • Bachelor's or Master's degree in Computer Science, Electrical Engineering, or related field.
  • 5+ years

    of hands-on experience developing

    Java Card applets

    for SIM, USIM, or eSIM.
  • Deep understanding of:
  • Java Card 3.x / GlobalPlatform 2.x

    standards
  • APDU communication and ISO 7816

  • Security domains, SCP02/SCP03, and OTA mechanisms

  • Experience with

    SIM/eSIM development and debugging tools

    (Gemalto, G&D, Thales, VALID, etc.).
  • Strong knowledge of

    GSMA SGP.02 / SGP.22 / SGP.32

    specifications.
  • Experience deploying and testing applets on

    UICC/eUICC

    hardware.
  • Proficiency in troubleshooting using logs, traces, and APDU-level analysis.
  • Solid understanding of c

    ryptography and key management

    in secure element contexts.
  • Excellent problem-solving skills and attention to detail.
  • Strong communication and documentation skills.

Preferred Qualifications

  • Experience with

    remote SIM provisioning (RSP)

    environments.
  • Knowledge of

    OTA platforms

    and

    backend integration

    with SIM lifecycle management systems.
  • Familiarity with

    embedded systems

    or

    secure hardware modules

    .
  • Previous work in telecom or IoT connectivity environments

    .

Why Join Us

  • Contribute to the advancement of cutting-edge telecom technologies and infrastructure
  • Collaborate with a diverse, experienced, and multicultural team of engineers and industry professionals
  • Enjoy a flexible work environment with remote work options
  • Receive a competitive salary and comprehensive benefits package
  • Grow your career through professional development opportunities and technical training

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