Senior Firmware Engineer

Ubifly Technologies Pvt Ltd; Chennai District; On-site; INR 2,500,000 - 4,200,000; Full time

Job summary

Ubifly Technologies Pvt Ltd in Chennai seeks a Senior Firmware Engineer to lead in-house development and verification of safety-critical embedded software powering our aerial mobility platforms. You will drive core firmware across BMS, BTMS, HV/LV converters, and related controllers, ensuring deterministic communication and robust fault handling.

You will own design/verification in Embedded C/C++, Python tooling, MISRA compliance, and hardware bring-up with JTAG/SWD and aerospace verification

Qualifications

• 6 to 9 years of hands-on embedded software development and verification experience in aviation/aerospace electronics or high-voltage power products.
• Expert-level Embedded C/C++, Python scripting for automated testing, and modern bare-metal microcontroller architectures (ARM Cortex-M or safety-rated dual-core MCUs).
• Familiarity with MISRA C/C++ rules and robust fault-handling architectures.
• Experience with JTAG/SWD, trace analyzers, CAN bus analyzers under live power conditions.
• Knowledge of aerospace standards such as DO-178C is a plus.

Responsibilities

• Design, implement, and validate production-grade firmware in Embedded C/C++ across core power architectures.
• Develop SoC/SoH algorithms, active/passive cell balancing, fault detection, and high-voltage contactor coordination.
• Real-time control loops for HV/LV converters and BTMS; power electronics modulation and protective switching.
• Develop bootloaders and low-level drivers for MCUs and peripherals; secure field-upgradable firmware.
• Lead debugging, hardware bring-up, diagnostics, and use of JTAG/SWD, oscilloscopes, logic analyzers.
• Collaborate with flight controls, hardware design engineers, battery systems, and V&V teams.

Skills

Embedded C/C++

Python scripting

ARM Cortex-M

JTAG/SWD

MISRA C/C++

CAN/CAN-FD

HIL testing

Code verification

Education

Bachelor's degree in Electrical/ Electronics/ Embedded Systems

Tools

LDRA

Rapita Systems

VectorCAST

Parasoft

Job description

As a Senior Firmware Engineer, you will spearhead the development and verification of safety-critical embedded code powering our in-house electronic systems for advanced aerial mobility . In this role, you will lead core firmware development and verification entirely in-house . Your software will drive the closed-loop control, monitoring, and fault handling of our Battery Management Systems (BMS SW), Traction Battery Pack safety logic, HV/LV DC-DC converters, chargers, and Battery Thermal Management System (BTMS) controllers, ensuring all sub-systems communicate deterministically to support aircraft-level integration.

What You Will Do

Core Sub-System Control: Design, implement, and validate production-grade firmware in Embedded C/C++ across our core power architectures:

BMS & Pack Safety: Core algorithmic firmware for state-of-charge (SoC), state-of-health (SoH), active/passive cell balancing, fault detection, and high-voltage contactor coordination.

HV/LV Converters: Real-time, high-frequency digital control loops for voltage/current regulation, power electronics modulation, and protective switching thresholds.

BTMS Logic: Actuator control loops (PWM, digital outputs) for pumps, fans, and active cooling/heating elements based on predictive thermal models.

Driver & Bootloader Authoring: Develop low-level bare-metal drivers for microcontrollers (ARM Cortex-M or safety- rated cores), peripheral chips (SPI, I2C, ADC), and custom, secure bootloaders for field-upgradable firmware.

Advanced Troubleshooting & Hardware Debugging: Diagnose complex, intermittent, and timing-critical system issues during hardware bring-up and qualification using JTAG/SWD debuggers, logic analyzers, oscilloscopes, and bus analyzers.

Aviation Verification & Tooling: Drive structural coverage analysis, static analysis, and dynamic code testing using static/dynamic verification suites such as LDRA, Rapita Systems (RapiTest/RapiCover), or equivalent aerospace-grade verification tools.

Deterministic Communication: Implement communication protocol stacks (CAN, CAN-FD) to interface seamlessly with the aircraft-level flight control computer, ensuring predictable timing, low jitter, and bounded latency.

In-House Code Ownership: Establish rigorous coding standards ( MISRA C/C++ ), architectural design patterns, software-in-the-loop (SIL) testing frameworks using Python, and automated test environments to scale internal development capabilities.

Cross-Functional & Stakeholder Collaboration

With Flight Controls & Systems Integration: Define communication data dictionaries, telemetry bandwidth limits, network diagnostic trouble codes (DTCs), and vehicle-level fail-safe handling modes to ensure the battery powertrain responds correctly to autopilot or pilot commands.

With Hardware Design Engineers: Partner during hardware bring-up and verification loops to isolate hardware vs. software issues, validate low-level registry settings, tune sensor calibration curves, and debug board-level signal integrity/timing constraints .

With Battery Systems & Thermal System Engineers: Translate physical electrochemical safety thresholds, charging curves, and cooling fluid flow requirements into algorithmic state machines and deterministic control code.

With V&V Testing Teams: Provide testable software builds equipped with diagnostic hooks, supporting the execution of automated Hardware-in-the-Loop (HIL) testing, safety fault injection testing, and aerospace compliance validation pipelines .

What We Are Looking For (Must-Haves)

Experience: 6 to 9 years of hands-on embedded software development and verification experience, specifically with high-reliability real-time control loops in aviation/aerospace electronics or high-voltage electrical power products (e.g., BMS, power converters, flight controls, or smart grid power distribution).

Language & Tool Mastery: Expert-level mastery of Embedded C/C++, Python scripting for automated testing/data parsing, and modern bare-metal microcontroller architectures (ARM Cortex-M or safety-rated dual-core MCUs).

Firmware Verification Tools: Hands-on experience authoring test suites, executing static analysis, and measuring code coverage (statement/branch/MC/DC) using tools such as LDRA Tool Suite, Rapita Systems, VectorCAST, or Parasoft.

Troubleshooting & Debugging Excellence: Exceptional skills in isolating complex firmware defects using JTAG/SWD, trace analyzers, logic analyzers, oscilloscopes, and CAN bus analyzers under live power conditions.

Safety Frameworks & Quality: Proven track record writing production code adhering to MISRA C/C++ rules and robust exception/fault-handling architectures.

Consultant Transition Leadership: Ability to dissect existing codebases, abstract requirements from external partners, write clean & maintainable code, and take absolute internal code ownership.

Preferred Skills (Good-to-Have)

Direct exposure to aerospace software compliance standards such as RTCA DO-178C / EUROCAE ED-12C (Design Assurance Level DAL B or C).

Experience with worst-case execution time (WCET) analysis and timing verification tools (e.g., RapiTime or AbsInt aiT).

Formal software testing or quality certifications ( e.g., ISTQB Foundation/Advanced, INCOSE ).