Petro – LangChain, Python, RAG

An EdTech platform for real-time, instructor-led classes with AI-driven learning features, built for active learning rather than general video conferencing. Its course-generation module turns an uploaded video into a complete lesson.

• Led the development team and architected the AI systems for the platform, coordinating AI feature delivery across the live classes, lesson modules, and infrastructure teams.
• Delivered AI-generated chat summaries and live quizzes for real-time instructor-led sessions with 100–1,000 learners.
• Extended the video processing pipeline with AI workflows that generate ready-to-use lessons and learning activities with measurable learning objectives.
• Reduced projected LLM costs by 35–40% by routing tasks to lower-cost models and applying prompt engineering.
• Redesigned the AI services architecture into modular services that are switched on per tenant according to their payment plan.
• Co-developed an AI agent for smart search across lesson materials, after repositioning an AI assistant concept as smart search over the original lesson content.
• Turned leadership ideas into actionable requirements for seven AI-driven features, analyzed competing EdTech platforms to identify three new types of AI-generated learning activities, and prepared user-focused use cases for the design team.

A development company where I worked on several client products: a Shopify returns app that resells returned items through local partner stores to cut merchants’ logistics costs, a restaurant inventory management system connecting restaurants with suppliers, and more.

• Owned architecture and feature delivery for several MVPs and core platform features, defining MVP requirements that balanced long-term extensibility with lean delivery.
• Initiated and led the Shopify returns app MVP, owning its architecture, infrastructure, CI/CD, and feature delivery.
• Led the migration from Stripe to Adyen, reducing payment-processing fees and increasing marketplace host revenue.
• Cut local and CI test execution time by 10x by migrating Jest transforms to SWC.
• Replaced XLS-based form configuration with a form builder supporting dynamic fields, validations, grid layouts, and persistent ordering.
• Introduced Terraform infrastructure as code as a reusable package for provisioning new client environments.
• Led and coached a team of 4 front-end engineers and helped them grow into full-stack developers. Redesigned the hiring process for new engineers, which improved probation success rates and team culture fit.
• Worked closely with clients, product owners, and project managers to define, estimate, and ship user-facing features, and mentored teammates across projects while improving team documentation.

A no-code platform for building bots and workflows, with chatbot features and platform integrations.

• Built and shipped chatbot features and platform integrations across the frontend and backend.
• Built 8 configurable Lambda-based workflow components for the no-code bot and workflow platform.
• Created an onboarding flow for new engineers that reduced onboarding time.
• Analyzed product requirements and worked closely with QA and UX to ensure high-quality implementations.

A global digital consultancy, systems integrator, and e-commerce agency. Petro built storefront features for clients’ e-commerce sites on the Hybris platform.

• Built and customized storefront features on Hybris, including advanced product filtering, product detail pages, and product listing pages, using jQuery and Vue.js.
• Solved cart state sharing on a storefront that mixed HTTP and HTTPS pages by using a hidden HTTPS iframe as a shared store, keeping cart data consistent across secure and non-secure pages.
• Worked with the team to define features, turning loosely specified client requests into front-end solutions that could be built on legacy enterprise platforms.