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Justin Gruen

Senior Full-Stack Engineer specializing in modern web applications

Cards.funWashington CollegeChicago, IL6 Years ExperienceSenior LevelWorks On-Site

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About

Full-stack developer with seven years of experience who has built production systems across AWS serverless infrastructure, Django applications, and user-facing web products in domains like emergency response, fintech/investing, recruiting, and conference management. Particularly notable for combining technical architecture with product thinking—e.g., modernizing a crash-tracking platform for emergency responders and materially improving trust-driven conversion in a trading-card fractionalization product.

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Key Strengths

  • End-to-end AWS data pipeline ownership
  • Cross-layer debugging with CloudWatch observability
  • Performance and reliability design for production systems
  • Strong decoupled architecture instincts
  • UX trust-building that improved conversion from 1 in 500 to 1 in 100
  • Rapid iteration using user behavior analytics
  • Reusable API abstraction across multiple Django models
  • Thoughtful handling of immutable/deactivated data workflows
  • Multi-tenant schema and permissions design
  • Experience building configurable survey/form systems

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Experience

Senior Full Stack EngineerCards.fun · Oct 2025 – Jan 2026
Full Stack EngineerBalzard LLC · Sep 2023 – Oct 2024
Senior Full Stack EngineerGreat Valley Web Design · Nov 2024 – Oct 2025
Full Stack DeveloperComcast · Apr 2021 – Sep 2022
Full Stack DeveloperGeospatial Innovation Program · Aug 2019 – Dec 2020
Full Stack Engineer (Six-month Contract)Rutgers University Division of Continuing Studies · Sep 2022 – Apr 2023contract

Education

Washington Collegebachelor, Computer Science & Business Management (2020)

Languages

English

Certifications

Amazon Web Services Certified Cloud Practitioner

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Typically responds within 24 hours

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Justin GruenSenior Full-Stack Engineer specializing in modern web applications