Senior/Lead Embedded HMI Developer (Freelancer)

We are looking for Senior and Lead Embedded HMI Developers (Freelancer) 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 involvementLong-term cooperation across multiple projectsRemote work arrangementsYou will work within an international HMI-focused team, delivering cutting-edge human–machine interfaces for embedded devices across multiple industries.About the RoleAs 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 decisionsSupport and mentor other developers (lead level)Act as a technical point of contact in HMI-related areasYou 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 ecosystemResponsibilities:Design and develop embedded HMI / GUI applicationsDefine and influence HMI architecture and design patternsDevelop graphical interfaces using:Qt / QML (Embedded Linux)Qt for MCUs, LVGL, or other MCU-focused frameworksOptimize rendering pipelines on constrained embedded systemsIntegrate UI layers with firmware, drivers, and hardwareAnalyze performance bottlenecks (CPU, memory, rendering, FPS)Support code reviews, technical decision-making, and mentoring (Lead role)Collaborate with embedded, firmware, hardware, and UX teamsParticipate in Proof of Concepts (PoCs) and early project phasesCore Requirements:5+ years of experience in embedded software developmentStrong expertise in Embedded HMI developmentExcellent C++ skills, including modern C++Hands-on experience with microcontroller platforms such as:STMNXPEspressifInfineonRenesasCommercial experience with at least one embedded HMI framework:Qt for MCUsLVGLTouchGFXSlintCrankEmbedded WizardKnowledge of rendering pipeline optimization in embedded systemsSolid understanding of architecture and design patternsExperience with version control, code reviews, and CI/integration toolsCommunicative English (spoken and written)Nice to Have:Experience with RTOS environments:FreeRTOSZephyrother RTOS solutionsUnderstanding of Agile methodologiesExperience working on Proof of Concept (PoC) projectsFamiliarity with hardware schematics and low-level debuggingExposure to UX/UI design principles for embedded systemsExperienced in using AI tools in day-to-day workflow