Ajjas
Website:
ajjas.com
Job details:
We are hiring an Embedded Engineer who can own hardware design and firmware development end-to-end. This is a hands-on, build-things role, not a management or architecture-only position.
Hardware Design
The core responsibilities for the job include the following:
- Own PCB schematic design and layout for new product SKUs and revisions of existing products.
- Select components and define BOMs evaluating MCUs, sensors, power management ICs, GNSS/GSM modules, CAN transceivers, and passives for cost, availability, and performance.
- Design and integrate sensor interfaces: temperature (NTC, OneWire, RS485), humidity, wind speed, rain gauge, IMU/accelerometer.
- Design relay and control circuitry for applications like compressor controllers (cold chain).
- Work with the testing team to validate prototypes, debug hardware issues, and iterate to production-ready designs.
- Manage the full cycle from schematic to prototype to production-ready board.
Firmware Development
- Write, maintain, and extend firmware in C/C++ on ARM Cortex-M and similar MCUs.
- Work with our existing RTOS (picoOS), adding new peripheral drivers, sensor integrations, and communication protocols.
- Implement and maintain CAN/CAN-FD protocol stacks for vehicle and BMS integrations.
- Handle OTA/DFU firmware update mechanisms for devices deployed in the field.
- Implement power management, sleep modes, and battery optimisation for field-deployed IoT devices.
- Debug device-side issues: sensor data anomalies, communication failures, and field edge cases.
Collaboration And Documentation
- Work closely with the software team to define firmware-to-server data protocols and ensure clean handoffs between device and backend.
- Document every design decision, schematic, BOM, firmware architecture change, and integration. If it's not documented, it didn't happen.
- Participate in weekly team meetings and proactively share progress, blockers, and technical context with the broader team.
- Support procurement with technical specifications and alternate-part recommendations.
Requirements
- Demonstrated hands-on experience in embedded systems, both hardware design and firmware development. We care about what you've built and shipped, not how many years you've spent.
- Proficiency in PCB schematic design and layout using Altium Designer, KiCad, Proteus, or equivalent.
- Strong embedded C/C++ firmware development skills on ARM Cortex-M or similar architectures.
- Experience with RTOS-based development (FreeRTOS, Zephyr, or custom RTOS).
- Working experience with CAN / CAN-FD protocols.
- Hands-on experience interfacing sensors over I2C, SPI, UART, RS485 and one-wire.
- Experience with GSM/LTE cellular modules and GNSS receivers.
- Solid understanding of power supply design, battery management, and low-power optimisation.
- Ability to read datasheets, evaluate components, and make BOM decisions independently.
- Ability to independently develop AIS140-compliant vehicle tracking devices, including understanding of AIS140 protocol requirements, hardware design for compliance, and integration with government-mandated VLTD specifications.
- Working knowledge of EMI/EMC design principles, testing, and regulatory compliance (BIS, CE). You should be able to design boards that pass EMI/EMC testing, not learn about it after a product fails certification.
- Proficiency in using AI tools for engineering work. This is not optional; it is core to how we work at Ajjas. Must-have AI skills:
- AI reasoning and research: Claude and/or ChatGPT for schematic review, datasheet analysis, protocol debugging, component selection, and technical decision-making.
- AI-assisted firmware development: Cursor (AI-native IDE) and/or GitHub Copilot for writing, editing, and refactoring embedded C/C++ code with AI inline assistance.
- Hands-on: You've designed boards and written firmware that shipped.
- Experience in IoT / telematics / connected-device products.
- Familiarity with OBD-II protocols and vehicle data.
- Experience with BLE and BMS (Battery Management System) integrations.
- Knowledge of OTA/DFU mechanisms for field-deployed devices.
- Experience taking a product from prototype through production and field deployment.
- Experience with AI-assisted PCB/EDA tools, any of the following:
- Flux AI cloud-native PCB design with AI-driven layout and automation.
- Quilter AI autonomous PCB routing and layout generation.
- ProtoFlow AI-assisted schematic capture (free, exports to KiCad).
- Cadence Allegro X or Altium AI features AI-driven placement, DRC, and routing assistance.
- Experience using Claude Code or similar agentic AI tools for complex, multi-file firmware tasks and architectural refactoring.
Who You Are As a Person
- You document your work without being asked. Design decisions, schematics, firmware changes you write things down as you go.
- You change reactively. You don't wait to be assigned work; you see what needs doing and you do it.
- You are a team player. You show up to meetings, share context, help colleagues when they're stuck, and care about the team's success, not just your own deliverables.
- You communicate clearly and early, especially when something isn't working or is going to take longer than expected.
- You are comfortable working across the stack - hardware, firmware, and the boundary with software - without treating any layer as beneath you.
This job was posted by Manish Arora from Ajjas.
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