IoT Product Developer

Job Title: Embedded Firmware Engineer (RF Focus)

Location: Gurgaon, Haryana (On -site)

Employment Type: Full-Time

Experience: 3-5 years

We’re hiring an Embedded Firmware Engineer (3–5 yrs) with strong experience in Sub-GHz RF, LoRa/LoRaWAN, and IoT systems. The role focuses on firmware development, RF communication, and secure telemetry.

About Aaizel Tech

Aaizel Tech is a pioneering tech startup at the intersection of cybersecurity, AI, geospatial solutions, and more. We drive innovation by delivering transformative technology solutions across industries. As part of our dynamic team, you'll gain hands-on experience and learn from experts who are dedicated to pushing the boundaries of what's possible.

Responsibilities

• Develop firmware for STM32 (WL/H/L/F series)

• Design & implement Sub-GHz RF (403/433/868/915 MHz) systems

• Work on LoRa PHY/MAC & LoRaWAN stack (OTAA/ABP, uplink/downlink)

• Perform RF testing & debugging (RSSI, SNR, range testing, SDR/spectrum tools)

• Implement secure communication (AES-128/256, CRC/SHA)

• Develop drivers: UART, SPI, I2C, ADC, DMA

• Work with FreeRTOS (tasks, queues, ISRs, low power)

• Build communication stacks: RS485/Modbus, RS232, MQTT, TCP/IP, UDP

• Implement bootloader & OTA updates

• Debug using SWD/JTAG, logic analyzer, DSO

• Optimize for performance, power, and RF reliability

Requirements

• 3–5 years in embedded firmware + RF systems

• Strong in Embedded C, STM32CubeIDE, HAL/LL

• Hands-on with LoRa/LoRaWAN & Sub-GHz communication

• Understanding of RF fundamentals (link budget, interference, antennas)

• Experience in secure communication (AES)

• Good knowledge of FreeRTOS & industrial protocols (RS485/Modbus)

• Strong debugging skills (firmware + RF)

• Basic hardware/RF PCB understanding

Good to Have

• Experience with ChirpStack / TTN

• Knowledge of FSK/GFSK

• RF certification exposure (CE/FCC/ETSI)

How to Apply

• Please submit your resume, portfolio, and a cover letter outlining your relevant experience and how you can contribute to Aaizel Tech’s success.

Responsibilities:

·        Collaborate with cross-functional teams, including hardware engineers, system architects, and product managers, to define software requirements and specifications for embedded systems.

·        Design and develop efficient, reliable, and scalable embedded software solutions that meet the defined requirements.

·        Write, test, and debug code in programming languages commonly used for embedded systems, such as C, C++, and assembly language.

·        Interface with hardware components, such as sensors, actuators, microcontrollers, and communication interfaces (UART, SPI, I2C,CAN etc.).

·        Develop and implement device drivers, firmware, and low-level software to control hardware peripherals.

·        Participate in code reviews to ensure code quality, maintainability, and adherence to coding standards.

·        Perform unit testing, integration testing, and system testing of the embedded software.

·        Analyse and optimize system performance, memory usage, and power consumption.

·        Collaborate with the quality assurance team to identify and resolve software defects.

·        Stay up-to-date with industry trends, tools, and technologies related to embedded systems and software development.

·        Document software design, code, and test procedures for internal and external use.

·        Provide technical support to other teams during product integration, testing, and deployment.

Qualifications:

·        Bachelor's or Master's degree in Computer Engineering, Electrical Engineering, or a related field.

·        Proven experience in embedded software development, including designing, coding, testing, and debugging.

·        Proficiency in programming languages such as C and C++.

·        Familiarity with Embedded C, 32-bit microcontroller,16-bit microcontroller hardware interfaces.

·        Knowledge of real-time operating systems (RTOS) and multi-threaded programming.

·        Strong problem-solving skills and ability to troubleshoot complex hardware-software interactions.

·        Excellent communication skills and the ability to work effectively in a team.

·        Familiarity with communication protocols (UART, SPI, I2C, CAN, Ethernet) is desirable.

·        Knowledge of security considerations in embedded systems is an advantage.

Location: Chennai

JD For Embedded C Engineer requirements :

Mandatory Skillsets are as below :

1. Embedded SW development background

2. Embedded C/C++/

3. Hands-on experience in RTOS Programming.

4. Working knowledge of SDLC and methodologies/tools for requirement management.

5. Experience working in an agile development environment.

We are a Digital Product Engineering company that is scaling in a big way! We build products, services, and experiences that inspire, excite, and delight. We work at scale — across all devices and digital mediums, and our people exist everywhere in the world (18000+ experts across 32 countries, to be exact). Our work culture is dynamic and non-hierarchical. We're looking for great new colleagues. That's where you come in!

Must Have Skills: PLC programming, WinCC, Siemens TIA portal, IOT

WHAT MAKES YOU A GOOD FIT FOR THIS ROLE:

• Experience in automation technologies PLC programming, WinCC OA, Siemens TIA portal, and protocols OPC UA, plant simulation.

• Must have prior experience working with clients in requirements & should be independently able to lead these discussions.

• Candidate should be fluent in the agile delivery model with experience in working with any of an agile product management tool, preferably JIRA.

• Ability to guide the team on technical solutions, perform code reviews, and define integration strategy.

• Working experience with SQL and NoSQL databases like MS SQL Server, PostgreSQL, MongoDB, etc.

• Ability to make and effectively communicate decisions. The candidate should know how to disagree, how to address opposition/rejection, how to navigate the conflicts in multistakeholder requirements, and how to build consensus.

• Effective written and verbal communication skills are essential to communicate in a global team and with clients.

• It would be advantageous to have experience as an architect or technical leader while working in one or more of the following domains: manufacturing, industrial automation, heavy engineering, robotics, automotive, and consumer goods.

WHAT ARE YOUR RESPONSIBILITIES:

• Understanding functional requirements thoroughly and analysing the client’s needs in the context of the project

• Envisioning the overall solution for defined functional and non-functional requirements, and being able to define technologies, patterns, and frameworks to realize it.

• Determining and implementing design methodologies and tool sets

• Enabling application development by coordinating requirements, schedules, and activities.

• Being able to lead/support UAT and production roll outs.

• Creating, understanding, and validating WBS and estimated effort for given module/task, and being able to justify it.

• Addressing issues promptly, responding positively to setbacks and challenges with a mindset of continuous improvement

• Giving constructive feedback to the team members and setting clear expectations.

• Helping the team in troubleshooting and resolving of complex bugs

• Coming up with solutions to any issue that is raised during code/design review and being able to justify the decision taken.

• Carrying out POCs to make sure that suggested design/technologies meet the requirements

About Apexon:

Apexon is a digital-first technology services firm specializing in accelerating business transformation and delivering human-centric digital experiences. For over 17 years, Apexon has been meeting customers wherever they are in the digital lifecycle and helping them outperform their competition through speed and innovation. Our reputation is built on a comprehensive suite of engineering services, a dedication to solving our clients’ toughest technology problems, and a commitment to continuous improvement. We focus on three broad areas of digital services: User Experience (UI/UX, Commerce); Engineering (QE/Automation, Cloud, Product/Platform); and Data (Foundation, Analytics, and AI/ML), and have deep expertise in BFSI, healthcare, and life sciences.

Apexon is backed by Goldman Sachs Asset Management and Everstone Capital.

To know more about us please visit:  https://www.apexon.com/" target="_blank">https://www.apexon.com/

Desired Candidate profile:

• 5+ years of Embedded/Linux SW Development relevant Experience in Embedded C++. 
• Expert knowledge in writing software for embedded Systems (Embedded C++ language).
• Experience on OTA would be an added advantage
• Work experience in software development on bare metal, RTOS or Internal Linux. 
• Work experience in developing firmware for 8/16/32 bit microcontrollers (ARM, RISC etc)
• Good understanding w.r.t usage of 1. RTOS like MQX. 
• Bootloader and software update concepts. 
• Communication protocols like TCP/IP,MQTT. 
• Socket programming in Linux environment. 
• Good knowledge on protocols like (RS485, SPI, I2C, ADCs, CAN, LIN) 
• Knowledge of Blue-tooth communication protocols for BLE 4.2/5.1. 
• Proficient in the use of embedded SW Development tool chain (Flash/ debug tool chain, IDE). 
• Version Control Systems –GIT 
• Should have detailed knowledge on microcontrollers/microprocessors 
• Experience in scripting languages like Shell / CAPL / Make/Python etc. 
• Experience in using tools like Logiscope / Function Generator / Oscilloscope, etc. 
• Good knowledge in reading schematics and datasheets. 
• Excellent analytical skills and problem-solving skills. 
• Strong communication and interpersonal skills. 
• Must be a self-starter. 
• Ability to work as part of a dedicated project team and independently 

• Hands-on embedded C skills (mandatory)
• Experience with any microcontrollers MCU (mandatory) – Renesas/ Infineon/ Cypress/ ST-Micro /TI / Microchip
• Experience with any of peripherals & communication protocols usage in application development (mandatory) – UART, I2C, SPI, I2S, CAN, USB, ADC, DAC, EEPROM, Flash memory
• Experience with any RTOS – FreeRTOS, Azure RTOS, ThreadX
• Experience with any networking &  connectivity modules (preferred & added advantage) – Ethernet, WiFi, BLE, MQTT, COAP

ORGANIZATION

Launched in 2014, Oxit has continually focused on true innovation in IoT services through the creation
of solutions and products for an adaptive global business marketplace. Our diverse list of clienteles,
ranging across a multitude of industries, has grown to recognize and trust Oxit in partnering in all
aspects of Smart Technology capabilities from designing to prototyping, development and carefully
launching their ideas

ROLE

Proficient in connected objects, an IoT embedded engineer develops innovative solutions that help
users to receive, control and manage information.
Conceptualizing, designing, developing, & managing IoT end devices, middleware, interfaces, and
connectivity

RESPONSIBILITIES

PRIMARY RESPONSIBILITIES
● Analyze, discuss and understand user/business requirements
● Translate business requirements to optimizer solutions, system & firmware specifications
● Design & Implement firmware/software as per specifications and conduct unit tests
● Managing & building end devices and middleware (Gateway development)
● Connectivity solutions, protocol implementation, stack development (ex: Lora)
● Perform integration, acceptance tests, troubleshooting, and debugging
● Work in collaboration with other team members, leadership, and other departments towards
solution implementation and delivery
● Adhere to organization/project process standards and guidelines
● Handling internal (team, departments, and leadership) and external (customers & partners)
interactions
● Collaborate with and support Hardware team towards HW design & development
● Collaborate with and support Software team towards backend development, API definition &
interfacing, Mobile, Cloud, & Web application definition

SECONDARY RESPONSIBILITIES
● Researching, creating, and testing IoT solutions
● Designing platform solutions that are cloud-compatible and work with IoT applications
● Providing solutions to issues related to the connection of networks and platforms
● Contribute to improving quality, accelerating development and deployment - process improvement
and tools improvement
● Showcase ability to play different Agile roles and manage small teams
● Supporting management with client interactions and at times leading it

SKILLS

PRIMARY SKILLS
● Hands-on programming experience in C/C++/Python in Embedded/IoT environment
● Good working knowledge of Linux internals & application development
● Good working experience of RTOS & bare metal programming
● Hands-on experience in device driver development
● Hands-on experience with protocol implementation (wired & wireless)
● Experience in executing projects in an Agile/Waterfall model
● Exposure to Gateways, web/cloud computing technologies, APIs, sockets, & related tools
● Exposure to JavaScript, Node.js, and typescript is an added advantage
● Proficient in C, C++, and Python programming, Java script added advantage
● Good understanding of Linux internals, Linux System programming, and application development
on Linux
● Hands-on experience with Container technologies (LXD, Docker and/or Kubernetes)
● Working knowledge and experience implementing FUOTA, Device management
● Working knowledge of Security - Encryption, Decryption, Flash management
● Working knowledge of Web architecture, Interfacing (APIs, MQTT, etc.)
● Hands on experience with Yocto, Ubuntu Core
● Experience with R Pi or similar platforms
● Working Knowledge and experience with LoRaWan on both Gateway and Devices

● Prior experience working on IoT Gateways

SECONDARY SKILLS
● Firm understanding of IoT architecture and principles
● Knowledge of device and data security
● AWS or related cloud architecture, tools & setup, API development
● LoRa stack experience, Network gateway functionality, networking: TCP/IP, DNS, DHCP, HTTP
● ESP32 architecture, Free-RTOS experience
● Work and collaborate well with others
● Strong communication skills
● Strong analytical and problem-solving skills

WORK ENVIRONMENT
● Minimum 3 years of prior experience
with embedded, firmware, & IoT
● Available full time (40 hours a week)
● Remote working infrastructures
● Flexible remote work (work from
anywhere)
● Certain overlap with EST business hours
● Full time (Mon-Fri, 8 hrs/day)
● Agile way of working & mindset
● Team work, frequent interaction &
collaboration with team & leadership
● Collaborations & meetings through
video conferencing
● Friendly & collaborative environment