Bluetooth developer

Job Description: Bluetooth (BT) Developer

Job Title: Bluetooth Developer

Location: Chennai

Department: Connectivity / Bluetooth

Reports To: Technical Lead / Manager – Connectivity

Role Overview

The Bluetooth Developer will be responsible for designing, developing, integrating, and validating Bluetooth features on automotive infotainment platforms. The role includes working on the Android/Linux Bluetooth stack, BT profiles (A2DP, AVRCP, HFP, PBAP, MAP, HID, PAN, SPP) and protocols, interoperability, performance optimization, and debugging complex BT issues. The developer will collaborate with cross‑functional teams including telematics, platform, UI/UX, validation, and OEM teams to deliver robust BT features for production programs.

Key Responsibilities

1. Bluetooth Stack Development & Integration

• Develop, customize, and integrate Bluetooth stack components (Fluoride stack/BlueZ or OEM BT stack).
• Implement and extend BT profiles such as:
• Hands-Free Profile (HFP)
• Advanced Audio (A2DP/AVRCP)
• Phonebook Access (PBAP)
• Message Access (MAP)
• HID, PAN, BLE GATT profiles
• Work on Android framework/BT service and HAL layer modifications.
• Update or create a design for Implementation or modification.

2. Bluetooth Audio & Telephony

• Work on audio path routing, SCO/eSCO handling, and BT audio performance tuning.
• Debug audio issues like:
• Stutter
• 1.5×/2× speed playback
• Delay or sync issues
• Call audio one-way/no audio
• Optimize latency, bandwidth, and codec performance (SBC/AAC/aptX LC3).

3. Bluetooth Low Energy (BLE)

• Develop and integrate BLE profiles and GATT services.
• Work with BLE privacy, random/static addresses, pairing/bonding, and reconnection strategies.
• Develop BLE scanning/advertising and coexistence strategies with Wi‑Fi.

4. Connectivity, Coexistence & Performance

• Debug BT/Wi‑Fi coexistence issues.
• Analyse connection drops, pairing failures, and reconnection behavior.
• Work on RF parameters, HCI command/response flows, and link quality behavior.

5. Debugging & Analysis

• Use tools such as:
• HCI snoop logs , Bluetooth HCI logs, Bluetooth Air Sniffer logs
• btmon/btsnoop , adb/logcat
• QXDM (for modem/BT integrated chipsets)
• Perform root cause analysis for complex field/issues from OEM/customer.
• Interact with chipset vendors (Qualcomm, Mediatek, CSR, TI, etc.) for bug resolution.

6. Interoperability (IOP) & Certification

• Support Bluetooth IOP testing with various phones (Android/iOS).
• Ensure compliance with Bluetooth SIG requirements.
• Support BT certification cycles and required documentation.

7. Software Quality & Process

• Participate in code reviews, unit testing, and integration testing.
• Ensure compliance with automotive quality processes (A-SPICE).
• Support Scrum/Agile development activities and deliverables.

Required Skills & Experience

Technical Skills

• Strong experience with Bluetooth stack internals (Android Fluoride stack or BlueZ).
• Knowledge of BT Classic and BLE protocols (L2CAP, SDP, GATT, RFCOMM, AVDTP, AVRCP, PBAP, MAP, HFP AT commands).
• Experience in C/C++, Java (Android stack), and Linux/Android system programming.
• Good understanding of BT controller, HCI layer, pairing/bonding, LE privacy, and address types.
• Ability to analyze BT/Wi‑Fi coexistence issues and RF behavior.
• Experience working on A2DP/AVRCP/HFP/PBAP/MAP.
• Good understanding of Audio frameworks (AudioFlinger, audio HAL).
• Run static analysis on the software components, analyze and fix errors.
• Execution of PTS test case in Launch studio for BT SIG certification
• Experience in RTOS environment working with BLE chipset vendors and their SDKs, such as Nordic Semiconductor (nRF52840, nRF52832) , Texas Instruments (CC2541, CC2540) and NXP (AW611, AW300, KW36, KW45).

Nice to Have

• Experience with car infotainment systems (Android Automotive / QNX / Genivi).
• Exposure to Qualcomm/Mediatek/NXP BT chipsets.
• Knowledge of ACL/SCO link behavior and codec tuning.
• Experience with OEM IVI systems (Ford, JLR, GM, Stellantis, VW etc.).