John Costik
Director, Digital Products at CostikCare LLC
New York, United States
Summary
🤩
Rockstar🎓
Top SchoolJohn Costik is a product-focused engineering leader and founder with 12+ years building regulated, safety-critical systems across embedded firmware, mobile apps, cloud services, and clinical trials. As Director of Digital Products at Beta Bionics he leads engineering, data science, cybersecurity and regulated application delivery while keeping teams fast and pragmatic. He co-created the influential Nightscout open-source CGM monitor, contributing mobile-first UI work and device integrations that improved real-world diabetes care. Comfortable spanning device firmware to cloud telemetry, he emphasizes usability, cost-efficiency, extensibility, and long-term supportability. Based in New York, he brings a mix of systems engineering rigor and product empathy that helps turn prototypes into validated, deployable solutions. He also runs CostikCare LLC to consult on end-to-end systems for meaningful, impact-driven projects.
12 years of coding experience
21 years of employment as a software developer
BS, Applied Arts & Sciences, Computer Science, Mathematics, BS, Applied Arts & Sciences, Computer Science, Mathematics at Rochester Institute of TechnologyEngineering Science, Electrical Engineering, Engineering Science, Electrical Engineering at Monroe Community CollegeMusic, Computer Science, History, Music, Computer Science, History at University at BuffaloThe American School In Japan
Github Skills (7)
html10
css10
responsive-design10
javascript10
user-interface10
mobile-development10
d3js8
Programming languages (6)
Github contributions (5)
nightscout/cgm-remote-monitor
Aug 2014 - Feb 2015
nightscout web monitor
Role in this project:
Front-end Developer
Front-end DeveloperContributions:25 commits, 2 PRs, 2 pushes in 5 months
Contributions summary:John primarily focused on front-end development within the NightScout web monitor repository. Their contributions involved making adjustments to the user interface for smaller devices, including responsive design improvements. They added mobile-specific icons, enabled full-screen mode on Apple devices accessed via home screen bookmarks, and implemented a treatment entry system. They also made styling and formatting changes to various UI elements.
nightscoutmonitornightscout-web-monitorweb-monitor
hackingtype1/cgm-simple-pebble
Jun 2015 - Nov 2015
Contributions:10 commits, 10 pushes, 2 branches in 5 months
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