IC Package Engineer

Etched is building AI chips that are hard-coded for individual model architectures. Our first product (Sohu) only supports transformers, but has an order of magnitude more throughput and lower latency than a B200. With Etched ASICs, you can build products that would be impossible with GPUs, like real-time video generation models and extremely deep chain-of-thought reasoning. We are seeking an experienced IC Package Design Engineer to drive and own all aspects of substrate layout and package design work. The ideal candidate will have extensive experience with advanced packaging technologies such as CoWoS, large-scale BGA designs, and package warpage mitigation strategies. You will play a key role in ensuring the mechanical and electrical integrity of packages that power the next generation of AI hardware. Representative Projects: Own the end-to-end package design process, including substrate layout and IC package design, while collaborating with internal teams and external vendors to deliver optimized, manufacturable solutions Leverage advanced packaging technologies, with expertise in CoWoS (Chip-on-Wafer-on-Substrate) and heterogeneous integration techniques, to design both open and closed packages, incorporating stiffeners as needed Expertise in large-scale BGA design, including experience with packages exceeding 4000-ball arrays, ball pitch optimization, routing, and power/ground plane design Conduct mechanical and warpage analysis to address package warpage and coplanarity requirements across varying package sizes, collaborating with mechanical teams for simulation and testing to minimize thermal and mechanical stress Perform design validation by assessing package layouts against electrical and mechanical constraints, providing design reviews and guidance on substrate and interconnect solutions, while archiving DFM-related learning for continuous improvement opportunities Collaborate cross-functionally with chip design, thermal, mechanical, and manufacturing teams to ensure holistic package solutions, while interfacing with vendors to align design requirements and production feasibility Oversee package reliability testing, including thermal, warpage, shock, shear, HTSL, HAST, ALT, JESD22, and electrical tests, while interfacing with various vendors to ensure compliance and quality You maybe a good fit if you have Bachelor’s or Master’s degree in Electrical Engineering, Mechanical Engineering, or related discipline 5+ years of experience in advanced IC package design, including CoWoS or equivalent technologies Proven experience in substrate layout and BGA package design for large ball arrays (>4000 balls) with >20 Ghz signaling and >500W Strong understanding of stiffener design, open vs. closed package requirements, and package warpage and coplanarity challenges across various sizes Proficiency in package design tools such as Cadence APD/SIP, Mentor Xpedition, or similar Familiarity with mechanical stress analysis, simulation, and validation methodologies Solid communication skills to work across multi-disciplinary teams and external partners Experience with advanced packaging nodes (e.g., 2.5D/3D stacking) Knowledge of thermal management techniques in package design Previous experience working in AI, HPC, or semiconductor design companies We encourage you to apply even if you do not believe you meet every single qualification. How we’re different: Etched believes in the Bitter Lesson. We think most of the progress in the AI field has come from using more FLOPs to train and run models, and the best way to get more FLOPs is to build model-specific hardware. Larger and larger training runs encourage companies to consolidate around fewer model architectures, which creates a market for single-model ASICs. We are a fully in-person team in Cupertino, and greatly value engineering skills. We do not have boundaries between engineering and research, and we expect all of our technical staff to contribute to both as needed. 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