# Ruth Rosenthal > Software Engineer Location: San Francisco Bay Area, United States Profile: https://flows.cv/ruthrosenthal Passionate software engineer with strong technical problem-solving and cross-functional collaboration skills. ## Work Experience ### Software Engineer @ Academia.edu Jan 2025 – Present | San Francisco, California, United States ### Software Engineer @ Qcells North America Jan 2023 – Jan 2024 | San Francisco, CA • Enabled company's expansion into new demand response programs by leading design and development of API endpoints that provide key telemetry and performance information. • Inherited ownership of backend microservice responsible for calculating costs and savings. Greatly improved accuracy of billing and savings estimation, leading to successful release of a savings dashboard that helps customers determine how our battery optimization software saves them money. • Improved performance of key billing calculation endpoint by 3x on first API call and >70x on subsequent API calls. • Implemented proper energy cost calculations under a complex tariff program for an important new energy market, providing customers with accurate cost and savings data. • Mentored other engineers to increase their familiarity with the cost calculation and energy dashboard service. • Created groundwork for team to develop a new battery optimization configuration microservice, including defining an MVP and breaking the project down into requirements, as well as setting up the repository tooling, CI/CD, and Kubernetes configurations. • Proposed, designed, organized, and led a developer forum for team members to present engineering design proposals, share knowledge on tools and services, and demo recently finished work. ### Software Engineer II @ Carbon Lighthouse Jan 2022 – Jan 2023 | San Francisco Bay Area • Built Carbon Lighthouse’s first self-serve payment, subscription, and paywall system using Stripe, allowing customers to easily pay directly for a newly introduced SaaS product rather than go through an extended manual contracting process. • Led a project to create an automated fault detection system. Utilized cronjobs to automatically review over thousands of data streams per week to detect unexpected operations that need to be rectified by commercial building owners in order to reduce energy usage. This project saved 40 hours of manual data stream review per week. • Developed an internal notification system that sends emails to internal users whenever a fault is detected. This notification system sent hundreds of email notifications per week and enabled internal users to promptly communicate faults to clients. • Coordinated and led a biweekly software demo meeting for a company-wide audience. Coached fellow software engineers on how to communicate their technical achievements to a wider audience. • Led an initiative to increase test coverage of a key web app, resulting in a 210% increase in test coverage. • Created enhanced reporting features that allowed customers to better view, access, and download granular energy savings data so they could fully understand the value of Carbon Lighthouse’s service. • Led a project to increase the speed at which Carbon Lighthouse could propose energy efficiency projects to clients by providing an estimated range of savings, costs, and yields. This allowed for faster time to value for clients and reduced internal workload. ### Software Engineer I @ Carbon Lighthouse Jan 2022 – Jan 2022 | San Francisco Bay Area ### Manufacturing Engineer III @ AstraZeneca Jan 2020 – Jan 2022 | Redwood City, California, United States • Process owner and technical expert responsible for driving successful commercial manufacturing of drug product intermediate. 100% of batches completed on time and in full. • As site Strategy Champion, lead Site Leadership Team to develop cross-functional site strategy through 2025. • Developed Spotfire data analytics dashboards using data from MS SQL Server database, enabling monitoring of key manufacturing process parameters and quality control data. • Designed and tested automation upgrades to make the production systems more robust and user-friendly. ### Manufacturing Engineer II @ AstraZeneca Jan 2019 – Jan 2020 | Redwood City, California • Process owner and technical expert for commercial drug product intermediate process • Lead cross functional team comprising of manufacturing, engineering, QA, QC, and safety representatives to ensure readiness for campaigns • Provide training, technical oversight, and equipment troubleshooting support to manufacturing technicians during production • Resolve deviations and implement CAPAs and change controls • Demonstrated process improvements that will double process throughput while improving process safety. • Program manager for development projects to further improve commercial process efficiency and capacity • Site business process owner for Lean Standard Work initiative ### Senior Scientist, Chemical Engineering Research & Development @ Merck Jan 2019 – Jan 2019 | Rahway, NJ • Directed process development and scale-up for several steps in the process to make a new API, culminating with successful generation of clinical batches at pilot plant scale with a more efficient and environmentally-friendly process. • Planned and executed experiments in the lab and at pilot scale with cross-functional team to improve process efficiency and reliability. ### Scientist, Chemical Engineering Research & Development @ Merck Jan 2017 – Jan 2019 | Rahway, NJ • Coordinated tech transfer of aseptic process to manufacturing site in France, including travel to manufacturing site to support batch processing. • Articulated control strategy to regulators by authoring relevant sections of the regulatory filings and responding to regulator questions after submission of filings, leading to successful FDA approval. • Improved site preparedness by assessing and mitigating site-based risks prior to process validation. • Worked cross-functionally with global team across R&D, external manufacturing, analytical, quality, and regulatory groups to resolve operational issues and to support investigations. • Directed process characterization work, analyzing and documenting key data from years of laboratory experimentation and development batches to determine the final commercial process. • Increased process yield 10% and drove definition of control strategy to ensure successful performance, including modifying process to reduce impurity formation. • Mentored other researchers supporting the program. • Served as department’s intern program coordinator and active member of recruiting team. ### Associate Scientist, Engineering, Chemical Process Development and Commercialization @ Merck Jan 2015 – Jan 2017 | Rahway, NJ • Prepared processes for successful scale-up through lab-scale development and characterization, including designing, performing, and analyzing design of experiments (DOE) studies. • Lead risk assessments to highlight potential process failure modes and gaps in understanding to address prior to commercialization. • Characterized manufacturing step on a short timeline leading up to process validation. • Proposed finalized process that was reviewed and approved by the team. Step was successfully validated at manufacturing site ### Operations Engineer (Rotational Assignment), Small Scale Organics Pilot Plant @ Merck Jan 2016 – Jan 2017 | Rahway, NJ • Coordinated the execution of pilot batches at 30 kg to 90 kg scale. • Worked in a cGMP environment where materials are produced for both clinical supply and demonstration of new processes at scale. • Adhered to all applicable compliance and safety requirements, cGMPs, SOPs, and other manufacturing documents. • Prepared batches for successful scale-up by determining appropriate equipment fit, generating PFDs and other set-up documentation, writing batch sheets, and assessing safety and environmental concerns. • Enabled successful batch execution by managing communication between key stakeholders including project team, analytical, safety, quality, plant leadership, supervisors, and operators. • Actively supported batches on floor and coordinated responses to unplanned events, such as low reaction conversion or an unexpected emulsion. Advised teams on path forward, organizing root cause determination and issue resolution. • Completed After Action Reviews for all processes to capture and document lessons learned. ### Merck Manufacturing Divison Intern, Chemical Process Development and Commercialization @ Merck Jan 2014 – Jan 2014 | Rahway, NJ • Conducted a literature search to create a novel toolkit of antioxidant additives to prevent the formation of oxidative impurities during the production of active pharmaceutical ingredients. • Tested and refined the toolkit by examining the effect of various antioxidant additives on active pharmaceutical ingredient impurity formation during crystallization of Merck compounds known to form oxidative impurities. • Successfully utilized additive toolkit to reduce oxidative impurity formation under stressed conditions by 90% in a model compound. ### International Research Exchange Program Intern, Department of Chemical and Biomolecular Engineering @ HKUST Jan 2013 – Jan 2013 | Laboratory of Dr. Ying Chau; Hong Kong, China • Created a nanoparticle carrier for the cancer drug paclitaxel to reduce side effects associated with the drug. • Tested the stability of the nanoparticles and optimized sizing so that the nanoparticles could better reach tumor cells. • Tested the release rate of the drug from nanoparticles using high-performance liquid chromatography (HPLC). • Tested the ability of the drug-loaded nanoparticles to kill cancer cells and compared with commercially available carriers. ### Summer Research Intern, Program in Atmospheric and Oceanic Sciences, Lab of Dr. Jorge Sarmiento @ Princeton University Jan 2012 – Jan 2012 | Princeton, New Jersey • Utilized MATLAB to analyze chlorophyll data ranging over 50- and 100-year time spans to discern long-term trends in phytoplankton concentration and evaluate effects of climate change on ocean ecosystems. • Presented poster on summer research at the Center for Southern Ocean Biogeochemical Observations and Modeling’s National Science Foundation (NSF) Site Visit. ## Education ### Bachelor of Science in Engineering (BSE) in Chemical and Biological Engineering, Magna Cum Laude Princeton University ### Mira Loma High School ## Contact & Social - LinkedIn: https://linkedin.com/in/ruth-rosenthal-00713462 --- Source: https://flows.cv/ruthrosenthal JSON Resume: https://flows.cv/ruthrosenthal/resume.json Last updated: 2026-04-11