Vanix Technologies
Website:
vanixtechnologies.com
Job details:
JOB DESCRIPTION:-
Senior Firmware Engineer
EVSE AC Charger Platform & Next-Gen Architecture
Position Summary:-
We are seeking an exceptionally skilled Senior Firmware Engineer to lead all firmware development, architecture, and production operations for our EVSE AC charging platform. This is a strategic technical leadership role requiring deep expertise in real-time embedded systems, power electronics control, IEC 61851 state machine implementation, communication protocols (CAN, RS485 Modbus, Ethernet, OCPP), and safety-critical systems. The successful candidate will be the firmware architecture owner, overseeing the stabilization of our 7.4kW platform, directing the roadmap for next-generation 11kW/22kW multi-gun designs, and managing the complete lifecycle from protocol stack design to production releases, FOTA, and safety operations.
Key Details:-
Position Type
Full-time
Joining Timeline
15 days to 1 month
Team Size
collaborate cross-functionally with hardware, hardware, QA, and product teams
Location
Hyderabad, India
Core Scope Of Work:-
Communication Protocols And Integration:-
- Design and implement multi-protocol stack architecture supporting: CAN bus (ISO 11898), RS485 Modbus RTU/TCP, Ethernet TCP/IP, and OCPP 2.0.1 over LAN
- Develop OCPP 2.0.1 client implementation with full compliance to Open Charge Point Protocol specification for remote device management
- Create robust CAN bus abstraction layer with message filtering, priority handling, and error recovery mechanisms
- Implement RS485 Modbus driver with proper framing, CRC validation, and timeout handling for building management system integration
- Manage API development and versioning for third-party integrations (fleet management systems, grid operators, etc.)
Software Tools and User interfaces:-
- Own firmware architecture and interfaces for the charger mobile APP (user-facing charging experience, session management, payment integration)
- Implement DMS Tool (Device Management System) backend APIs for fleet operators and service technicians
- Architect FOTA (Firmware Over-The-Air) system for safe, versioned firmware updates with pre-update validation and rollback capability
- Ensure secure firmware update pipelines with encryption, signature verification, and staged rollout mechanisms
Next Generation Architecture Design:-
- Act as architecture owner for next-generation charger platforms: Type-11 (11kW), and Type-22 (22kW) designs
- Design modular firmware architecture to support multi-gun configurations (e.g., 4-gun simultaneous charging scenarios)
- Scale IEC 61851 state machine and metering logic to handle multiple simultaneous charging sessions with load balancing
- Develop power management and thermal control algorithms for higher power levels while maintaining safety and efficiency
- Ensure architectural clarity and reusability across product variants to minimize code duplication and technical debt
Firmware Roadmap and Strategic Planning:-
- Define and maintain the firmware roadmap aligned with business goals and technical evolution
- Plan protocol stack enhancements, feature additions, and technology adoption (e.g., future smart metering standards)
- Evaluate emerging EV charging standards (ISO 20898, OCPP 3.0, etc.) and propose adoption timelines
- Manage technical debt, refactoring priorities, and code quality initiatives
Sprint Ownership and Development execution:-
- Own sprint planning, task breakdown, and story estimation for firmware development cycles
- Drive daily stand-ups and maintain team velocity and delivery commitments
- Conduct code reviews, enforce coding standards, and mentor junior firmware engineers
- Lead technical design reviews and architectural discussions for complex features
Primary Responsibilities:-
- Direct end-to-end firmware development for 7.4kW production platform and next-generation products
- Implement and maintain IEC 61851 state machine, CP signal processing, metering, and safety-critical control logic
- Design protocol stack architecture for multi-protocol support (CAN, RS485, Ethernet, OCPP 2.0.1)
- Architect FOTA system and manage all firmware releases to production
- Define APIs for APP, DMS Tool, and third-party integrations
- Lead firmware roadmap and technical strategy for multi-variant product portfolio
- Mentor and guide firmware engineering team toward best practices and technical excellence
- Collaborate with hardware teams on signal integrity, power management, and real-time requirements
- Ensure compliance with EV charging standards, safety regulations, and Indian certifications
Required Qualifications:-
Experience and Expertise:-
- 5+ years of embedded firmware development experience
- 5+ years in real-time embedded systems, microcontroller programming (ARM Cortex-M, STM32, NXP), and safety-critical applications
- Expert-level proficiency in C/C++ with emphasis on embedded systems, RTOS patterns, and low-level optimization
- Hands-on experience implementing IEC 61851 (EV charging standard) state machine or equivalent safety-critical state machines
- Proven track record with power electronics control: PWM drivers, ADC conversion, analog signal conditioning, current/voltage sensing
- Production experience: shipped 2+ products to market with full lifecycle management (development, testing, release, maintenance)
- Strong expertise in multiple communication protocols: CAN (ISO 11898), RS485 Modbus, Ethernet TCP/IP, and ideally OCPP or similar IoT protocols
- Hands-on experience implementing or integrating OCPP (Open Charge Point Protocol) with firmware systems
- Experience designing and implementing FOTA (Firmware Over-The-Air) update mechanisms with secure update pipelines
- Knowledge of metering/energy measurement systems, including calibration, accuracy standards, and multi-tariff handling
- Demonstrated ability to design scalable firmware architecture supporting multiple product variants and configurations
- Experience with safety-critical systems: failure mode analysis (FMEA), functional safety principles, and risk assessment
- Strong debugging skills: experience with logic analyzers, oscilloscopes, JTAG/SWD debuggers, and protocol analysis tools
- Proficiency with version control (Git), continuous integration/deployment (CI/CD) pipelines, and agile development practices
Leadership and Soft Skills:-
- Proven technical leadership: experience mentoring engineers, conducting architecture reviews, and driving technical decisions
- Strong communication: ability to articulate complex technical concepts to both engineers and non-technical stakeholders
- Ownership mindset: proactive problem-solving, end-to-end responsibility, and drive to deliver high-quality solutions
- Collaborative approach: strong cross-functional teamwork with hardware, QA, product, and operations teams
- Attention to detail with a commitment to code quality, documentation, and maintainability
Education:-
- Bachelor's degree in Electronics Engineering, Electrical Engineering, Computer Science, or equivalent hands-on experience
Desired Qualifications:-
- Experience in EV charging infrastructure, power delivery systems, or renewable energy platforms
- Familiarity with RTOS (FreeRTOS, Zephyr, ThreadX) and real-time scheduling concepts
- Knowledge of wireless protocols: BLE, NB-IoT, LTE-M for IoT connectivity
- Experience with cloud integrations and REST API design
- Certification in functional safety (ISO 26262, IEC 61508) or EV charging standards (IEC 61851, GB/T)
- Experience with hardware testing frameworks and automated test infrastructure
- Background in the Indian EV/renewable energy sector and familiarity with local regulatory requirements
Technical Competencies:-
Expertise Required
Firmware Architecture
Modular design, scalability, multi-variant support, real-time constraints, performance optimization
EV Charging Standards
IEC 61851 state machine, CP/PP signal handling, Vehicle-to-Charger communication, safety state transitions
Communication Protocols
CAN (ISO 11898), RS485 Modbus, Ethernet TCP/IP, OCPP 2.0.1 over LAN/HTTP(S)
Power Electronics Control
PWM drivers, ADC/metering, current sensing, thermal management, power delivery optimization
Safety & Compliance
PE loss detection, PEN monitoring, functional safety, FMEA, failure mode handling, fault recovery
FOTA & Releases
Secure firmware updates, signature verification, rollback mechanisms, staged rollouts, versioning
Software Engineering
Code reviews, Git/CI-CD, unit testing, integration testing, debugging, documentation
Working Conditions:-
- Office-based with access to development labs, test equipment, and hardware prototypes
- Regular interaction with hardware team, QA, and cross-functional stakeholders
- May require periodic site visits to manufacturing partners, testing facilities, or customer deployments
- Standard office hours with flexibility for project urgencies and production support
- On-call support for critical production issues and release management
Why Join Us?
- Lead architecture and strategy for a critical, high-visibility product serving India's EV infrastructure needs
- Opportunity to shape next-generation product lines ( 11kW, 22kW, multi-gun designs) from the ground up
- Work on technically complex, safety-critical systems with measurable impact on the EV ecosystem
- Direct technical leadership: mentor engineers, influence architecture, and drive innovation
- Exposure to multiple domains: power electronics, IoT, cloud integration, smart metering, and FOTA systems
- Collaborate with experienced hardware, QA, and product teams in a mission-driven environment
- Professional growth through challenging technical problems, emerging standards adoption, and leadership development
- Be part of India's sustainable transportation revolution—making EV charging reliable, accessible, and smart
Send your CV to hr@vanix.in
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