EMBEDDED SOFTWARE ENGINEER

Oleksandr Gergel

Embedded engineer with 7+ years of experience in firmware development, hardware integration, RTOS-based systems, 4G IoT products, BLE devices, SDK integration, and product launch support.

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Kyiv, Ukraine +380 96 300 3939 C, C++, RTOS, Embedded Linux, build systems, 4G IoT, BLE

PROFESSIONAL EXPERIENCE

Selected work by role.

GLOBALLOGIC / QUALCOMM
2024 - 2026

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Embedded System Engineer — 4G LTE Cat-M / NB-IoT modem platform

Developed production embedded C firmware for a resource-constrained 4G IoT modem platform running on eCos RTOS.

Worked on 4G LTE Cat-M/NB-IoT modem firmware for Qualcomm chipsets used in low-power IoT devices.
Designed and integrated low-power behavior including PSM/eDRX flows, wakelock handling, and timing-sensitive modem state transitions.
Built multi-threaded service logic with POSIX pthreads, explicit stack sizing, scheduling priority tuning, and thread lifecycle control.
Designed custom AT command handlers for network configuration, SIM management, band selection, and modem control features.
Developed OTP firmware updater functionality for manufacturing mode and production programming support.

PSPM → WAKE → GPIO → LTE

LOW POWER / RF ARBITRATION

Shared antenna through deep sleep

Timing-safe antenna sharing across active and deep sleep.

UART → FLASH → VERIFY

OTP BOOTLOADER / FACTORY

Production programming without JTAG

Factory programming in an immutable boot environment.

RSA2K → RSA4K → UPDATE PATHS

SECURE BOOT / COMPATIBILITY

RSA-2048 to RSA-4096 migration

Signed-image compatibility across update paths.

cerence

GLOBALLOGIC / SEMVOX
2022 - 2024

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Embedded Software Engineer — cross-platform speech SDK

Developed and maintained cross-platform SDK components for integrating TTS and ASR engines into customer applications.

Researched and implemented TTS/ASR engine integration techniques so different speech engines could work through one SDK interface.
Integrated three new TTS engines and supported multiple customer-facing SDK releases.
Developed SDK features, engine abstraction layers, and platform-specific improvements for Windows, Linux, and Android.
Improved SDK usability through sample applications, integration examples, and technical documentation.
Worked on build-system improvements, Makefiles, platform-specific toolchains, and multiple language bindings.

CONFIG → RUNTIME → CALLBACKS

NATIVE RUNTIME / C/C++

Feature delivery through the runtime

Configuration, state, callbacks, and APIs.

BUILD → PACKAGE → TARGET

SDK DELIVERY / PORTABILITY

Build, package, and platform integration

Artifacts, bindings, diagnostics, and target platforms.

ENGINE → SDK → APPLICATION

INTEGRATION / CUSTOMER SUCCESS

Interfaces developers can use

Stable SDK surfaces for application teams.

JABIL
2020 - 2022

Embedded Software Engineer — wearable-device sensor platform

Developed wearable firmware at the boundary of sensors, RTOS coordination, BLE communication, and hardware bring-up.

Worked on embedded C/C++ firmware for sensor acquisition, device communication, and system-control behavior.
Used RTOS tasks, queues, semaphores, and synchronization to coordinate acquisition, processing, and communication work.
Supported hardware integration and debugging across sensor interfaces, interrupts, timing behavior, and BLE transport.

INTERRUPT → QUEUE → TASK

RTOS / SENSOR PIPELINE