Embedded Protocol Stack Developer

1 day ago

Bengaluru, Karnataka, India Melange Systems Pvt Ltd Full time

Role Overview

The Embedded Protocol Stack Developer will be responsible for the
design, development, optimization, and maintenance
of communication protocol stacks such as
TCP/IP, DLMS/COSEM, and Zigbee
for smart metering and IoT devices.

The role requires strong embedded system experience with hands-on development on microcontrollers and real-time environments.

Key Responsibilities

Design, develop, and implement
DLMS/COSEM client/server stacks
on embedded platforms

Develop and optimize
TCP/IP network stack
modules (IPv4/IPv6, DHCP, ICMP, UDP/TCP)

Integration and customization of
Zigbee Pro stack
, security & network layers

Protocol conformance & interoperability testing with utilities and Zigbee/DLMS test tools

Debug and resolve communication issues using analyzers (Wireshark/Protocol Analyzers)

Work on
security features
— AES/PKI, key exchange, secure session management

Optimize memory, CPU usage, and network performance for MCU constraints

Ensure compliance with BIS/IS standards & relevant IEC specifications etc.)

Prepare protocol documentation, design specs, and test reports

Collaborate with hardware, firmware, and product teams for seamless integration

Participate in customer interoperability tests and field issue resolution

Technical Skills Required

Must Have:

  • Strong C/C++ development in Embedded environments
  • Experience with
    DLMS/COSEM
    protocol development (Client/Server)
  • Zigbee / IEEE protocol stack development
  • TCP/IP networking fundamentals:
  • IPv4/IPv6, TCP, UDP, DHCP, ARP, ICMP, Routing
  • Embedded OS/RTOS (FreeRTOS, ThreadX, etc.)
  • Hands-on debugging using
    Wireshark
    , Serial analyzers, Logic analyzers
  • Microcontroller platforms: STM32, NXP, Renesas, TI, etc.

Good to Have:

  • MQTT, CoAP, 6LoWPAN, LoRaWAN
  • TLS/DTLS, secure boot, crypto libraries (mbedTLS, OpenSSL, TinyCrypt)
  • Experience with Smart Meter Communication standards —
    IS 15959, BIS, WMBUS
  • Bootloader and OTA firmware upgrade implementation
  • Familiarity with G3-PLC or NB-IoT communication stacks

Soft Skills

  • Strong problem-solving and communication skills
  • Ability to manage tasks independently and mentor juniors
  • Exposure to field deployment and issue diagnosis

Preferred Certifications

  • DLMS UA association certification experience
  • Zigbee Alliance product certification knowledge
  • Network security certifications (optional)

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