Celestial AI

Test Engineer - ATE & SLT

Optical Test Engineer

Senior Firmware Engineer

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Product Engineer – ATE, SLT & Optics

Optical SerDes Validation Engineer

Celestial AI is seeking a Test Engineer with expertise in Automated Test Equipment (ATE) and System-Level Testing (SLT). This role involves developing and optimizing test strategies for semiconductor and optical components, working closely with design, product, and validation teams. Key responsibilities include debugging test programs, analyzing data for yield improvement, developing test patterns, supporting various digital/analog test interfaces, and automating data collection. The engineer will also provide failure analysis support and drive continuous improvement in test coverage and efficiency, with a strong emphasis on optics-based testing if applicable.

Package Integration Engineer

<h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">About Celestial AI</h2>As Generative AI continues to advance, the performance drivers for data center infrastructure are shifting from systems-on-chip (SOCs) to systems of chips. In the era of Accelerated Computing, data center bottlenecks are no longer limited to compute performance, but rather the system’s interconnect bandwidth, memory bandwidth, and memory capacity. Celestial AI’s Photonic Fabric™ is the next-generation interconnect technology that delivers a tenfold increase in performance and energy efficiency compared to competing solutions.The Photonic Fabric™ is available to our customers in multiple technology offerings, including optical interface chiplets, optical interposers, and Optical Multi-chip Interconnect Bridges (OMIB). This allows customers to easily incorporate high bandwidth, low power, and low latency optical interfaces into their AI accelerators and GPUs. The technology is fully compatible with both protocol and physical layers, including standard 2.5D packaging processes. This seamless integration enables XPUs to utilize optical interconnects for both compute-to-compute and compute-to-memory fabrics, achieving bandwidths in the tens of terabits per second with nanosecond latencies.This innovation empowers hyperscalers to enhance the efficiency and cost-effectiveness of AI processing by optimizing the XPUs required for training and inference, while significantly reducing the TCO2 impact. To bolster customer collaborations, Celestial AI is developing a Photonic Fabric ecosystem consisting of tier-1 partnerships that include custom silicon/ASIC design, system integrators, HBM memory, assembly, and packaging suppliers.<h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">ABOUT THE ROLE</h2>We are seeking a Test Engineer with expertise in Automated Test Equipment (ATE) and System-Level Testing (SLT) to join our team. The ideal candidate will play a key role in developing and optimizing test strategies for semiconductor and optical components. Experience with optics-based testing is a strong plus.<h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">ESSENTIAL DUTIES AND RESPONSIBILITIES</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Develop, debug, and optimize ATE and SLT test programs for production and validation.</li><li class="leading-relaxed">Work closely with design, product, and validation teams to define and implement test requirements.</li><li class="leading-relaxed">Analyze test data to improve yield, performance, and reliability.</li><li class="leading-relaxed">Develop and maintain test patterns and test methodologies for different device types.</li><li class="leading-relaxed">Support JTAG, boundary scan, and other digital/analog test interfaces.</li><li class="leading-relaxed">Collaborate with hardware and firmware teams to ensure test coverage and debug failures.</li><li class="leading-relaxed">Automate data collection, analysis, and reporting to enhance efficiency.</li><li class="leading-relaxed">Provide failure analysis and debug support for both production and engineering samples.</li><li class="leading-relaxed">Support new product introduction (NPI) and drive continuous improvement in test coverage and efficiency.</li><li class="leading-relaxed">If applicable, develop and execute optics-based testing methodologies for integrated photonics or optical components.</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">QUALIFICATIONS</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Bachelor's or Master's degree in Electrical Engineering with 5+ years of Industry experience.</li><li class="leading-relaxed">Hands-on experience with ATE platforms (e.g., Advantest, Teradyne, LTX, etc.).</li><li class="leading-relaxed">Experience in SLT, functional testing, and debug at the system level.</li><li class="leading-relaxed">Proficiency in programming test scripts (Python, C/C++, or equivalent).</li><li class="leading-relaxed">Strong knowledge of semiconductor testing methodologies, test coverage, and data analysis.</li><li class="leading-relaxed">Familiarity with JTAG, boundary scan, and communication protocols (I2C, SPI, PCIe, etc.).</li><li class="leading-relaxed">Experience in failure analysis, yield improvement, and test optimization.</li><li class="leading-relaxed">Excellent debugging and problem-solving skills.</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">PREFERRED QUALIFICATIONS</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Experience in optics/photonics testing (lasers, modulators, optical transceivers, etc.).</li><li class="leading-relaxed">Knowledge of optical instrumentation (power meters, spectrum analyzers, interferometers, etc.).</li><li class="leading-relaxed">Familiarity with high-speed signal integrity and RF testing.</li><li class="leading-relaxed">Experience in data visualization tools for test analysis.</li><li class="leading-relaxed">Working knowledge of Confluence and JIRA.</li></ul>For California Location:As an early stage start up, we offer an extremely attractive total compensation package inclusive of competitive base salary, bonus and a generous grant of our valuable early-stage equity. The target base salary for this role is approximately $195,000.00 - $225,000.00. The base salary offered may be slightly higher or lower than the target base salary, based on the final scope as determined by the depth of the experience and skills demonstrated by candidate in the interviews.We offer great benefits (health, vision, dental and life insurance), collaborative and continuous learning work environment, where you will get a chance to work with smart and dedicated people engaged in developing the next generation architecture for high performance computing.Celestial AI Inc. is proud to be an equal opportunity workplace and is an affirmative action employer.#LI-Onsite

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Aera Technology is seeking a UX Designer to redesign existing products with a modern, customer-centric UI and define end-to-end experiences for new initiatives. The role involves collaborating with other designers, product management, and engineering teams to deliver sustainable, intelligent, and efficient decision intelligence solutions. The designer will contribute to user research, information architecture, interaction design, visual design, and design systems, ensuring a high-quality user experience.

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Aera Technology is the Decision Intelligence company. We deliver innovation and services that enable enterprises to operate sustainably, intelligently, and efficiently. Our platform, Aera Decision Cloud™, integrates with your existing systems to digitize, augment, and automate decisions in real time. Aera helps enterprises around the world transform decision making – delivering millions of recommendations that have resulted in significant revenue gains and cost savings for some of the world’s best-known brands.As a UX Designer who will be contributing to redesign our existing product with “modern” customer-centric user interface and defining end-to-end experience for new products/initiatives, working collaboratively with other designers, product management, and engineering team.<h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Responsibilities</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">User research & discovery: Plan and run interviews, task analysis, surveys; synthesize insights into personas, and opportunity maps.</li><li class="leading-relaxed">Information architecture: Define navigation, taxonomy, and content hierarchy; design flows for key journeys and edge cases.</li><li class="leading-relaxed">Interaction design: Create wireframes, user flows, and prototypes (low→high fidelity); specify component behaviors and micro-interactions.</li><li class="leading-relaxed">Visual & motion design: Establish visual hierarchy, layout, typography, iconography, motion principles; ensure consistency and craft.</li><li class="leading-relaxed">Design systems: Build and maintain reusable components, tokens, and patterns; partner with engineering for implementation parity.</li><li class="leading-relaxed">Accessibility: Design and review for WCAG compliance (contrast, focus, semantics, ARIA), keyboard/voice support, captions/alt text.</li><li class="leading-relaxed">Usability testing: Plan and run tests, A/Bs, heuristic reviews; translate findings into iterations.</li><li class="leading-relaxed">Content design: Write and structure UI copy, error messages, empty states, and onboarding.</li><li class="leading-relaxed">Dev collaboration: Provide specs, states, and assets; participate in sprint ceremonies, QA design.</li><li class="leading-relaxed">AI experience strategy: Identify where AI adds value (assist, automate, augment); prioritize use cases and define the “role” of the AI.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Measures of Success (OKRs)</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Task success rate: % of attempts that meet acceptance criteria (if no change requests come from PM team)</li><li class="leading-relaxed">State coverage: % of shipped flows with full specs.</li><li class="leading-relaxed">Error & recovery: rate of UX-preventable errors;</li><li class="leading-relaxed">Accessibility compliance: WCAG issues per release;</li><li class="leading-relaxed">Design→dev parity: % components/states implemented to spec; escaped UX bugs post-release.</li><li class="leading-relaxed">State coverage: % of key flows documented across ideal/empty/loading/error/permission states.</li><li class="leading-relaxed">Experiment velocity: A/Bs or usability studies run per quarter</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">About You</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">3–6+ years designing end-to-end web product experiences with shipped work.</li><li class="leading-relaxed">Strong interaction + visual craft: flows, wireframes, prototypes, component specs, accessibility (WCAG 2.2).</li><li class="leading-relaxed">User research hands-on: plan/run interviews and usability tests; turn findings into decisions.</li><li class="leading-relaxed">Design systems: contribute components/tokens, work with engineers to achieve parity in code.</li><li class="leading-relaxed">Content design basics: clear microcopy, states, error messages, and empty/loading patterns.</li><li class="leading-relaxed">Collaboration: agile rituals, developer handoff, QA of UX details; excellent written/spoken communication.</li><li class="leading-relaxed">Tools: Figma (auto-layout, variants), FigJam/Miro, prototyping (Figma prototypes), Jira.</li><li class="leading-relaxed">AI UX literacy: knows when to assist/automate/augment; can design for ambiguity, partial confidence, and recovery.</li><li class="leading-relaxed">Great presentation skills and comfortable justification for the design decisions you made</li><li class="leading-relaxed">Leading simultaneous projects with fast turnarounds.</li><li class="leading-relaxed">Familiarity and comfort in working with engineers - willingness to learn the technical constraints of implementing certain design principles.</li><li class="leading-relaxed">Last but not the least, take pride in the work and have a positive attitude.</li></ul>If you share our passion for building a sustainable, intelligent, and efficient world, you’re in the right place. Established in 2017 and headquartered in Mountain View, California, we're a series D start-up, with teams in Mountain View, San Francisco (California), Bucharest and Cluj-Napoca (Romania), Paris (France), Munich (Germany), London (UK), Pune (India), and Sydney (Australia). So join us, and let’s build this!Aera Technology is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender perception or identity, national origin, age, marital status, protected veteran status, or disability status.Benefits SummaryAt Aera Technology, we strive to support our Aeranauts and their loved ones through different stages of life with a variety of attractive benefits, and great perks. In addition to offering a competitive salary and company stock options, we have other great benefits available. You’ll find comprehensive medical, Group Medical Insurance, Term Insurance, Accidental Insurance, paid time off, Maternity leave, and much more. We offer unlimited access to online professional courses for both professional and personal development, coupled with people manager development programs. We believe in a flexible working environment, to allow our Aeranauts to perform at their best, ensuring a healthy work-life balance. When you’re working from the office, you’ll also have access to a fully-stocked kitchen with a selection of snacks and beverages.We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

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This assessment gives us an idea of your C++ skills- Companies that evaluate this skillset in interviews: Rockstar Games, Ubisoft, Mayhem Studios, etc.- 10 Multiple Choice questions- Average time to complete: 7 to 10 minutes

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