Principal Cloud & Systems Architect (m/w/d) aka “Chief Cloudcraft Architect”

ON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we’re scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future. We’re looking for a Principal Power Electronics Engineer to set the technical direction for the grid-connected inverters at the heart of ON.energy’s AI UPS product family. This is the senior technical voice for power electronics on the product team: you architect the converter and controls approach, resolve the hardest engineering trade-offs, set the engineering standards others work to, and represent ON.energy’s inverter engineering externally — to vendors, customers, certifying bodies, and the broader industry. You are fluent in power electronics, its controls (grid-following and grid-forming), and BESS integration — ideally with UPS experience in mission-critical applications — and you own the inverter technical thread from proposal through FAT, commissioning, and field feedback for MW-scale systems.  Key Responsibilities  Architecture & technical authority  * Own the grid-connected-inverter product architecture and converter-controls strategy — grid-following and grid-forming operation, current limiting, and dynamic grid support — and the technical roadmap across concurrent product cycles.  * Define the engineering standards, design rules, and review gates the team works to; act as the final technical authority on the inverter change baseline.  * Serve as the company’s SME for grid-code and UPS performance compliance — IEEE 2800, IEEE 1547, UL 1741, IEC 62040-3, ERCOT ride-through — and set the inverter qualification / type-test program, acceptance criteria, and current-limit / short-circuit and data-evidence requirements suppliers must meet.  * Act as the ultimate escalation point for inverter root-cause analysis (current-limit, post-fault recovery, thermal, control instability) and drive corrective design changes.  * Mentor senior power-electronics, controls, and project engineers to scale the team’s technical capability.  Vendor management & supply strategy  * Own the strategic inverter vendor / OEM relationships and decide their architecture — sole-source vs dual-source, co-development depth, and IP boundaries.  * Set and enforce the inverter technical qualification process; run the highest-stakes design reviews and resolve the highest-stakes vendor escalations personally.  * Oversee vendors through design, FAT, serial production, and post-deployment corrective action; own procurement technical specifications and acceptance.  * Maintain vendor scorecards and drive continuous improvement across the supply base.  Proposal, documentation & project support  * Support business development with technical proposals — SLDs and GAs — that meet the customer’s needs, and compile inverter technical information packages for the project engineering team.  * Co-lead review and validation of inverter-related topics during project execution; maintain technical documentation, including as-built drawings.  * Support integration of the inverter with the EMS, Plant Controller, and SCADA layers.  Product development  * Capture design-improvement feedback across the design, commissioning, and O&M phases and turn it into product changes.  * Recommend design approaches and vendors for the main equipment; participate in product design sprints and in the product’s commissioning phase.  Required Qualifications & Skills  * Bachelor’s degree in Electrical Engineering, Power Electronics, or a closely related technical field; MS preferred.  * 10+ years of hands-on power-electronics engineering, with a demonstrated record of operating with minimal direction in a senior technical role.  * Architecture-level decision authority on previous grid-connected-inverter, power-electronics, or BESS equipment — you’ve made the trade-off calls others built around.  * Proven system-level design of MW-scale power-electronics equipment, with deep converter-controls depth (grid-following / grid-forming, current limiting, protection).  * Fluency producing and reviewing SLDs, GAs, schematics, and panel layouts; expert with AutoCAD or equivalent E-CAD.  * Standards authority: UL 1741, IEEE 1547, IEEE 2800, IEC 62040-3, NFPA 855 / UL 9540 context; modeling with EMT tools (PSCAD, MATLAB / Simulink, PLECS).  * Strong track record running strategic vendor / OEM relationships through design, FAT, serial production, and post-deployment escalation.  * Excellent written and verbal communication — specs, technical positions, design-review leadership, and board-level briefings.  * Willing to travel up to 25–30% for FAT inspections, site commissioning, customer engagements, and vendor reviews.  Preferred Experience  * Direct experience with data center / UPS / mission-critical power or utility-scale BESS at the architecture level.  * Grid-forming inverters, advanced power-semiconductor (e.g., SiC) designs, and weak-grid / low-SCR EMT and impedance-stability validation.  * History of leading products through NRTL certification (UL, CSA, Intertek) and FAT / commissioning.  * Active Professional Engineer (PE) license; involvement in standards bodies (IEEE, UL, IEC, NFPA); patents or peer-reviewed publications.  ---------------------------------------------------------------------------------------------------------------------------------- For US-based roles - What you’ll get: * Competitive salary + annual performance-based bonus eligibility * Medical, dental, and vision insurance * 401(k) with company match * Paid time off and company holidays  For Mexico-based roles - What you’ll get: * Competitive salary + annual performance bonus eligibility * Christmas Bonus (Aguinaldo): 30 days * Major medical expenses and life insurance * Paid time off and holidays (per local policy) For all roles: * Professional development and growth opportunities * Opportunity to grow with a mission-driven team shaping the future of clean energy * Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation. * Accommodations: If you need an accommodation during the application process, email recruitment@onenergystorage.com [recruitment@onenergystorage.com] * Benefits vary by role and location and are subject to change.

Principal data architects at Thoughtworks play a key part in developing modern data architecture approaches to meet business objectives and provide end-to-end data solutions.  They are responsible for enabling clients and Thoughtworks teams to align on outcomes that support the vision painted by data strategists. They lead the design and architecture of the initiatives which are key to delivery of solutions to budget and timelines. They also guide and mentor delivery teams on  architectural decisions to deliver to the solution agreements. JOB RESPONSIBILITIES * You will collaborate with sales and pre-sales to clarify requirements and design viable solutions  and drive pursuits with technical stakeholders. * You will lead complex data programs, navigating architectural concerns and enabling delivery teams to deliver on accepted standards within time and budget. * You will provide client-facing technical leadership and guidance on topics related to data architecture, engineering, and analytics to advise clients on bringing their data strategy to life. * You will interact with client counterparts from the enterprise architecture group and lead the delivery, alignment and sign-off of key architectural decisions, trade-offs and ways of working. * You will communicate both high- and low-level technical details of data architecture to engineers and business stakeholders. * You will be able to collaborate, influence and guide at the intersection of analytical and operational architecture. * You will be responsible for the technical design of data governance, data security and data privacy to fulfill compliance requirements. * You will seamlessly incorporate data quality frameworks and processes to address and fulfill requirements as set out in strategy and acceptance criteria. * You will represent Thoughtworks in various online and offline forums, including events and conferences. JOB QUALIFICATIONS TECHNICAL SKILLS * You have experience in defining and implementing different types of data architecture, analyzing trade-offs and can define technology stacks for different types of data architecture. * You have experience in designing application system architecture based on big data, artificial intelligence and related technologies. * You have rich experience in building, maintaining and tuning data platforms, as well extensive experience in data warehouse design, data modeling, data monitoring and operations. * You have experience with common design patterns, application frameworks and foundational/theoretical knowledge (i.e.: distributed systems, data intensive applications, etc.). * You are passionate about data infrastructure and operations, with expertise working in cloud environments. * You are proficient in common open-source distributed computing/storage technologies, including but not limited to YARN, Impala, Spark, MapReduce, Kafka and Flink, with practical project architecture experience. * You have experience in defining, developing and enabling data-driven techniques, advanced analytics, ML/AI and data mining applications in enterprise. * You have experience in developing real-time and low-latency data streaming solutions and a differentiated view on the complexities and tradeoffs connected with them. * You have experience in productionizing machine learning models and applying techniques, tools and processes. PROFESSIONAL SKILLS * You must have extensive pre-sales experience and a proven ability to independently drive complex pursuits and create winning commercial proposals. * You understand the importance of stakeholder management and can easily liaise between clients and other key stakeholders throughout projects, ensuring buy-in and gaining trust along the way. * You are a native-level German speaker (C1 German) that is comfortable and experienced to drive consensus with mostly technical stakeholders. * You are resilient in ambiguous situations and can adapt your role to approach challenges from multiple perspectives. * You have a good understanding of business and communication, collaboration skills, strong learning and summarizing abilities. * You don’t shy away from risks or conflicts, instead you take them on and skillfully manage them. * You coach, mentor and motivate others and you aspire to influence teammates to take positive action and accountability for their work. * You enjoy influencing others and always advocate for technical excellence while being open to change when needed. * Cultivating strong partnerships comes naturally to you; You understand the importance of relationship building and how it can bring new opportunities to our business. OTHER THINGS TO KNOW LEARNING & DEVELOPMENT There is no one-size-fits-all career path at Thoughtworks: however you want to develop your career is entirely up to you. But we also balance autonomy with the strength of our cultivation culture. This means your career is supported by interactive tools, numerous development programs and teammates who want to help you grow. We see value in helping each other be our best and that extends to empowering our employees in their career journeys. RESPONSIBLE USE OF AI IN RECRUITMENT At Thoughtworks, we use AI tools to support our recruitment team with administrative tasks such as drafting communications, scheduling interviews and writing job descriptions. Crucially, our AI tools do not screen, assess, rank or make hiring decisions. Every application is reviewed by our team and all selection decisions are made exclusively by our interviewers and hiring managers. We are committed to fairness and responsible AI. We actively manage our AI systems by testing, monitoring for biased outcomes and implementing mitigation measures. We hold our third-party vendors to these same high standards through a rigorous governance process. For additional information, please see our full Thoughtworks AI Policy for Recruitment. ABOUT THOUGHTWORKS Thoughtworks is a dynamic and inclusive community of bright and supportive colleagues who are revolutionizing tech. As a leading technology consultancy, we’re pushing boundaries through our purposeful and impactful work. For 30+ years, we’ve delivered extraordinary impact together with our clients by helping them solve complex business problems with technology as the differentiator. Bring your brilliant expertise and commitment for continuous learning to Thoughtworks. Together, let’s be extraordinary. #LI-Onsite See here our AI policy.