Senior/Lead Embedded HMI Developer (Freelancer)

We are looking for Senior and Lead Embedded HMI Developers (Freelance) to join us in a project-based cooperation model.
The engagement will be based on a contract for a specific project, typically lasting several months, with flexibility regarding:
• Part-time or full-time involvement
• Long-term cooperation across multiple projects
• Remote work arrangements
You will work within an international HMI-focused team, delivering cutting-edge human–machine interfaces for embedded devices across multiple industries.
About the Role
As a Senior / Lead Embedded HMI Developer, you will play a key role in designing, developing, and shaping the architecture of embedded HMI solutions.
This role goes beyond pure implementation - you will:
• Influence technical and architectural decisions
• Support and mentor other developers (lead level)
• Act as a technical point of contact in HMI-related areas
You will be part of a dedicated HMI Synergy team, consisting of embedded and UI enthusiasts who actively share knowledge and best practices.
Why Is It Worth Joining Us?
🔥 Why join our HMI team?
➡️ You will work on diverse, industry-grade embedded products (e.g. audio processing, industrial devices, smart electronics)
➡️ You get real influence on system architecture and technology choices
➡️ You’ll collaborate with HMI and embedded experts who are passionate about UI on constrained systems
➡️ We are a Certified Premium Partner of The Qt Company and part of the Qt Service Partner Program, actively contributing to the Qt ecosystem
Responsibilities:
• Design and develop embedded HMI / GUI applications
• Define and influence HMI architecture and design patterns
• Develop graphical interfaces using:• Qt / QML (Embedded Linux)
• Qt for MCUs, LVGL, or other MCU-focused frameworks

• Optimize rendering pipelines on constrained embedded systems
• Integrate UI layers with firmware, drivers, and hardware
• Analyze performance bottlenecks (CPU, memory, rendering, FPS)
• Support code reviews, technical decision-making, and mentoring (Lead role)
• Collaborate with embedded, firmware, hardware, and UX teams
• Participate in Proof of Concepts (PoCs) and early project phases
Core Requirements:
• 5+ years of experience in embedded software development
• Strong expertise in Embedded HMI development
• Excellent C++ skills, including modern C++
• Hands-on experience with microcontroller platforms such as:• STM
• NXP
• Espressif
• Infineon
• Renesas

• Commercial experience with at least one embedded HMI framework:
• Qt for MCUs
• LVGL
• TouchGFX
• Slint
• Crank
• Embedded Wizard

• Knowledge of rendering pipeline optimization in embedded systems
• Solid understanding of architecture and design patterns
• Experience with version control, code reviews, and CI/integration tools
• Communicative English (spoken and written)
Nice to Have:
• Experience with RTOS environments:• FreeRTOS
• Zephyr
• other RTOS solutions

• Understanding of Agile methodologies
• Experience working on Proof of Concept (PoC) projects
• Familiarity with hardware schematics and low-level debugging
• Exposure to UX/UI design principles for embedded systems
• Experienced in using AI tools in day-to-day workflow