Our embedded software development services cover firmware for IoT devices, RTOS integration, and BSP development. We build production-ready code for STM32, ESP32, and ARM platforms. From wireless sensors to industrial controllers, we deliver embedded software that runs reliably for years.
As an custom firmware development company, CoreFragment handle the complete stack from bootloader to application layer. Our engineers write device drivers, optimize power consumption, and implement OTA updates. We have shipped firmware for medical devices, automotive systems and connected products globally.
We specialize in RTOS integration, custom BSP development, and Linux kernel customization. Your hardware needs embedded software with proper error handling, security implementation, and maintainable architecture. We deliver source code, documentation, and full IP ownership in every project.

CoreFragment team have expertise including firmware development, OTA update, remote device management services , networking protocol integration etc.
Choosing the wrong execution model early costs weeks of rework. We evaluate your hardware constraints, latency requirements, and power budget — then design accordingly. For multi-task applications we build RTOS architectures using FreeRTOS, Zephyr, or ThreadX. Where RTOS overhead is unacceptable, we write deterministic bare-metal C with interrupt-driven state machines. Both approaches are delivered with unit tests, static analysis, and documentation your team can maintain.
Security retrofitted after tape-out is expensive. Security designed in from the architecture phase is not. We implement secure boot with hardware root-of-trust, encrypted NVM storage, TrustZone-based key isolation, TLS/DTLS communication stacks, and runtime integrity monitoring.
Devices in the field need software updates. Devices in the field also can not afford a bad update that bricks a unit. We architect OTA systems with encrypted firmware packages, cryptographic signature verification, A/B partition failover, rollback on failed boot, and delta update support to minimise data transfer. We integrate with AWS IoT Jobs, Azure Device Update, or custom backend infrastructure, whichever your cloud team already runs.
Battery life is not determined at the hardware design review - it is determined in the firmware. We instrument your device power draw at the software level, identify every unnecessary wake cycle and peripheral that stays on too long, then rework the execution model to fix it. Deep sleep sequencing, peripheral gating, dynamic voltage scaling, and wake-source optimization are all part of the engagement. We have hit 5-year coin-cell targets on STM32L4 and nRF52 platforms on deployments that started failing to meet 18 months.
The decisions made in the first two weeks of an embedded project determine how painful the next six months are. We run structured architecture engagements - defining memory layout, task boundaries, HAL design, middleware interfaces, and security model before a line of production code is written. We document every decision and the rationale behind it, so your team inherits a codebase they understand rather than one they fear.
Firmware that passes lab testing and fails in the field is the most expensive outcome in embedded development. We build test strategies that catch real-world failure modes — unit tests with Unity and CMock, hardware-in-the-loop testing on target silicon, power regression suites, and static analysis with PC-lint or Polyspace. We also set up CI/CD pipelines so every commit gets built and tested automatically, not just before release.
We do not write embedded software as a side service. It is what our engineers do every single day. Every engagement starts with the hardware and every decision is made with that hardware in mind.
We read datasheets before writing a single line of code. MCU errata, peripheral timing constraints, memory bank conflicts — we check all of it first. Most embedded bugs we fix were caused by software that ignored the hardware manual.
We do not deliver good enough embedded software and call it done. Our codebases follow MISRA C guidelines, pass static analysis tools, include unit tests, and are structured so your team can maintain and extend them after handover.
Secure boot, encrypted NVM, hardened communication stacks - these get designed into the architecture on day one, not added as a final sprint when a customer asks.
Some projects need a full RTOS. Others need bare-metal execution to hit a 10µA sleep current. We have shipped both at production scale and know which one your application actually needs and why.
Your embedded software is your IP. We sign a mutual NDA before any technical discussion. All source code, build scripts, documentation, and test suites are transferred to you upon project completion. We retain nothing.
We offer embedded hardware, app development , IoT and AI development services as a full stack product engineering company.
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More DetailsCoreFragment Technologies follow a milestone-driven process from the first technical call to final source code handover.
1
We go through your hardware platform, OS requirements, connectivity stack, power budget, and project constraints. It is free, and it is technical.
2
We document functional and non-functional requirements, define the software architecture, select the RTOS or execution model, and agree on deliverables and milestones before any code is written.
3
Memory layout, task architecture, driver interfaces, security model, and OTA strategy are all defined and reviewed before development begins. You know exactly what we are building before we build it.
4
Sprint-based development with regular builds delivered to your hardware team. Code is version-controlled, reviewed, and tested incrementally. You have access to the repository throughout the engagement.
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Unit tests, hardware-in-the-loop testing, power profiling, and regression suites run across all modules.
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Full source code, documentation, build system, and test suite delivered to your team. OTA pipeline verified end-to-end. Post-handover retainer support available for ongoing maintenance and releases.















Yes, always. We sign a mutual NDA before any technical discussion begins. Your hardware architecture, software IP, and product roadmap are fully protected throughout the engagement. All source code, documentation, build scripts, and test suites are transferred to you at project completion. You retain total ownership.
Both. A significant portion of our work involves embedded software or firmware development from scratch but we also offer auditing service for legacy codebases for improvement and suggestions it required. We conduct a structured technical discovery before any legacy engagement so we know exactly what we are taking on.
We have production experience with STM32, Nordic nRF52 series, ESP32 and ESP8266, NXP i.MX RT, Silicon Labs, Microchip PIC32, TI CCxxxx, and Raspberry Pi. We also work on custom SoC platforms given adequate documentation.
We develop all layers of embedded software. From bootloaders and hardware abstraction layers to RTOS application code, device drivers, and embedded Linux userspace applications. Our work covers IoT devices, industrial controllers, medical instruments, automotive modules, smart wearables, and agricultural sensors.