# Jacob Brandt > Code Alchemist | Klaviyo | Ex-Perch | Ex-Chewy | Ex-Amazon Location: Medford, Massachusetts, United States Profile: https://flows.cv/jacobbrandt ## Work Experience ### Senior Software Engineer @ Klaviyo Jan 2023 – Present | Boston, Massachusetts, United States As a Senior Software Engineer and Technical Product Owner on the Personalization Team, I lead the design, development, and deployment of machine learning-driven personalization solutions. My responsibilities span technical leadership, product strategy, and hands-on engineering. I work extensively with Python, Django, PySpark, Airflow, EMR, and Terraform to build and maintain key personalization models, including Customer Lifetime Value (CLV), Channel Affinity, Expected Date of Next Order, Expected Date of Next Cross Sell, Next Best Product, and Personalized Send Time. I developed and continue to maintain the RFM (Recency, Frequency, Monetary) feature used, currently the leading selling feature in Klaviyo's KDP and MA offering.I led the development of both the Expected Date of Next Cross Sell and Next Best Product models, driving end-to-end implementation from model design to production deployment. I am currently leading the development of a Personalized Send Time Optimization system to improve customer engagement through precise timing of communications. In my TPO role, I help define the team's timeline and technical requirements, align cross-functional priorities, and ensure our personalization products deliver measurable business value. ### Senior Software Engineer @ Perch Jan 2021 – Jan 2022 As a Software Engineer, I contributed to the development of internal tools and data integrations that supported advertising and inventory optimization for products sold on Amazon.com. I designed and built manual advertising campaign controls, enabling more granular campaign management. I also led the development of automated campaign controls that dynamically responded to stock status, improving advertising efficiency and reducing waste. In addition, I integrated Inventory Forecast data into the broader data pipeline and built an asynchronous process to upload this data reliably and at scale, improving operational visibility and planning. ### Software Engineer III @ Chewy Jan 2020 – Jan 2021 As a Software Engineer at Chewy, I was responsible for designing, developing, and deploying several core backend services that supported personalization, pricing, and promotions. I led service architecture efforts, wrote production-grade code, conducted code reviews, and collaborated with platform engineering to ensure scalability and high availability across systems. Segment Membership Service: I designed and built this RESTful service from the ground up to allow internal services to quickly verify customer or product membership in defined segments. This enabled use cases such as promotion eligibility checks and personalized recommendations. The service was deployed to AWS and used actively in production. Promotion Engine: I led the design and code reviews for the Cart Validation Engine, which determined applicable promotions for customer carts and managed promotion codes. This service was also deployed to AWS and used in production environments. Multi-Region / Multi-Availability Strategy: I partnered with platform engineering to migrate services to a multi-region architecture for greater fault tolerance. I developed recovery strategies for service failures (ECS, Lambda, etc.) and implemented data synchronization plans across regions. This strategy was successfully deployed to production. Pricing Engine: I led the architectural design for Chewy’s next-generation pricing engine, a suite of services responsible for determining real-time product pricing. I authored development, testing, and execution strategies, contributed to service implementation, and led code review and standardization efforts. This project was in active development during my tenure. ### Software Engineer II @ Chewy Jan 2018 – Jan 2020 As a Software Engineer II at Chewy, I focused on building scalable, intuitive internal platforms that empowered non-technical stakeholders to manage promotions and customer segmentation. I played a key role in both backend service design and frontend integration, contributing to projects that were critical to Chewy’s personalization and marketing infrastructure. Segment Management Service: I led design discussions and was responsible for building the SQL statement builder engine and APIs for this web-based platform. The service allowed internal users to define customer segments using SQL-like logic via an intuitive UI and push those segments to downstream systems (e.g., Segment Membership Service) and external platforms like Facebook. Originally deployed on-prem, the service was later migrated to AWS (Nebula 2) and remained in active production use. Promotion Authoring Platform: I led the design and implementation of the Cart Validation Model used to determine applicable promotions for customer carts. I developed the engine that converted legacy Java-based promotions into the new validation model, and created the migration scripts to transition all existing promotions into the updated system. This web service empowered business users to create and manage promotions via a React-based UI and was successfully deployed to production, later migrated to AWS infrastructure. ### Software Development Engineer I @ Amazon Robotics Jan 2017 – Jan 2018 I worked at Amazon Robotics as an SDE on the Movement Services team. On the team, I was the lead engineer working for the the service that manages maintenance activities at Amazon's fulfillment centers. The service utilizes many of AWS's tools such as SWF, Dynamo DB, and S3 for managing, scheduling, and storing the various activities occurring on the floors of the FCs. ### Fundamentals of Computer Science II TA @ Northeastern University College of Computer and Information Sciences Jan 2013 – Jan 2016 | Greater Boston Area (Sept. - Dec 2013, Sept - May 2016) As a Fundamentals of Computer Science II TA I was tasked with overseeing students' hands on experience with basic computer and concepts and the world of Java. As a TA I lead workshops on both functional Java and Object oriented Java, answering any questions given by students and lightly guiding them to solutions. I also provided office hours so students could come to receive one on one help outside of class. ### Software Development Co-op @ Eze Software Group Jan 2015 – Jan 2015 At Eze Software I use C# to create support systems tools to monitor the company's OMS trading service. The support tools record the OMS trading data in order to ensure reliability in its performance. The tools are also able to export the recorded data in easily to read JSON format as well. I also designed a command line version of the company's consistency support tool as well as created documentation for its use. ### Software Developer @ EverCompliant Ltd Jan 2014 – Jan 2014 At EverCompliant I worked with one other employee developed a web crawler to scrape millions of websites. The information being scraped highly ranges on the regularity of it's syntax and formation. Thus we required the use of multiple libraries and technologies for the production of these web crawlers. Some examples of information being scraped were email addresses, phone numbers, and street addresses. We were also tasked with making the web crawlers highly time efficient. To do this we added multi-threaded capabilities to the web crawlers. In addition the web crawlers had to interact with an API to retrieve the URLs to be parsed as well as push the scraped information as valid JSON. We also preformed various other tasks while at EverCompliant such as built an application to screen capture webpages and generating company reports as a web document. ### Software Engineering Intern @ True Fit Corporation Jan 2014 – Jan 2014 At True Fit I was tasked with updating the look of various store's True Fit application. Using HTML and CSS, I kept every store's look modern and natural down to the last pixel. I was also tasked with building a RESTful File Library API for True Fit's large file system using the companies main language, Scala. In addition I used Scala to add features to True Fit's test website to help ensure the quality of True Fit's web application. ## Education ### Computer Science Northeastern University Jan 2012 – Jan 2016 ## Contact & Social - LinkedIn: https://linkedin.com/in/brandtjacob - Website: https://laazer.github.io/ --- Source: https://flows.cv/jacobbrandt JSON Resume: https://flows.cv/jacobbrandt/resume.json Last updated: 2026-03-22