STEPHEN LESHKO

ML & Web App Developer

I’m a dedicated developer specializing in web technologies, AI, and scalable solutions

Stephen Leshko

Work Experience

Technical Cofounder

March 2023 - June 2025
  • Cofounded an AI job search platform, scaling to $70,000+ revenue and 12,500 monthly active users, building tools that help students and new grads land roles more efficiently
  • Engineered a high-throughput vector-based job matching engine scanning 300,000+ postings daily across 18,000+ companies, embedding job and user data to generate personalized match scores
  • Built a multi-step LLM pipeline for cover letter generation and resume optimization, producing 34,000+ documents using Firebase and Google Cloud infrastructure
  • Designed behavioral segmentation and analytics pipelines using user telemetry to drive feature prioritization and improve conversion across onboarding and subscription funnels
  • Grew a LinkedIn audience to 11,000+ followers, establishing a primary organic acquisition channel and driving consistent referral traffic
  • Won 1st place at the Nittany AI Challenge (71 teams) and selected for a competitive startup accelerator, securing funding and mentorship to scale the product
  • CMPSC 263 Instructor, Pennsylvania State University

    Jan 2025 - May 2025
  • Trusted by the School of Electrical Engineering and Computer Science to design and lead a full-stack & blockchain development curriculum, instructing 45+ students to build production-grade applications using Next.js, Firebase, & Solidity through lectures and project-based learning
  • Backend Developer, Achievify

    Jan 2023 - Sep 2023
  • Scraped the O*NET occupational database and enriched 1,000+ career profiles with LLM-generated content for PathQuester, a Microsoft-funded AI career guidance app
  • Mobile Developer, Veraplex Solutions LLC

    Jan 2023 - Sep 2023
  • Shipped a React Native mobile app end-to-end for a regional restaurant group, engineering the backend on Google Cloud Run with Square, Google Maps, and DoorDash API integrations
  • Education

    Pennsylvania State University

    Bachelor of Science, Computer Science (2025)
  • GPA: 3.88
  • Relevant Coursework: Data Structures & Algorithms, Artificial Intelligence, Operating Systems