PhotoniX Synergy is a journal dedicated to advancing photonic integration, including hybrid and heterogeneous, bridging cutting-edge materials, devices, circuits, architecture and system-level applications. The journal emphasizes synergy in photonics, where the integration of diverse platforms, such as silicon photonics, lithium niobate, and III-V semiconductors, enables functionalities beyond the reach of any single technology. By combining high-speed electro-optic modulation (LiNbO₃), efficient light generation (InP), and scalable fabrication (SiPh), synergistic integration unlocks breakthroughs in communications, sensing, bioimaging, and radar. The scope also covers emerging paradigms like meta-chips, 2D material heterostructures, opto-electronic circuits and architecture design for efficient computing or communication, hardware-software co-design of opto-electrical hardware systems, and AI-driven photonic design, fostering interdisciplinary innovation. PhotoniX Synergy uniquely prioritizes system-level co-integration, benchmarking real-world performance, and industry-academia collaboration, ensuring relevance from lab to market. By addressing the full stack, from novel materials to scalable fabrication and end-use applications, the journal will catalyze the next wave of photonic technologies, where integration is not just a method but a multiplier of capabilities. List of Topics (Including but not limited to) Photonic integrated circuits Silicon photonics Hybrid and heterogeneous photonic integration 3D photonic integration Integrated quantum photonics Integrated microwave photonics AI-driven design and optimization of photonic integrated circuits Emerging materials for photonic integration New fabrication techniques Photonic integrated circuits and architecture for optical computing and AI Photonic integrated circuits and architecture for communications Photonic integrated circuits and architecture for sensing and imaging Photonic chip modelling and characterization Algorithm-hardware co-design of electrical-photonic integrated hardware Optoelectronic compilation tools and deployment methodologies Testing and validation methods for photonic integrated hardware Non-ideality analysis, modeling and solutions of photonic integrated hardware.