David Kwesi Quarshie

Eliminated a critical performance bottleneck by optimizing legacy PostgreSQL queries and execution logic, reducing PACS-to-web study sync latency from 9 minutes to under 5 seconds. Engineered core backend modules and clinical features for a Radiology Integrated System (RIS) using Python (Django) and PostgreSQL, and built dynamic web interfaces (HTML/CSS/JS) to support DICOM image workflows. Improved software delivery reliability in an Agile environment using Bitbucket, Jira, and CircleCI automated testing/deployment pipelines. Supported customers via onboarding demos and troubleshooting with clinical clients, including calls to assist with product setup. Participated in a 6-month engineering hiring cycle, evaluating technical candidates to help scale the engineering team.

Promoted to Tech Lead and sole backend engineer to architect an API-first insurance platform (Glico) using Laravel (PHP), MySQL, and React. Implemented multi-tier Role-Based Access Control (RBAC) for Client, Admin, and Super Admin roles, including Paystack payment gateway integration and SendGrid email notifications. Built a custom Productivity & Project Management suite (Jira clone) with client approval workflows, comprehensive user activity logging, and a secure permissioned file management system. Integrated Google Analytics API into client dashboards for real-time visualization of traffic and conversions. Managed cloud/DNS/hosting operations across 20+ client web assets and executed zero-data-loss migrations from cPanel to Hostinger with continued network security, records, and SSL management. Mentored a junior frontend engineer and an intern on code reviews, API design, and i18n best practices.

Co-developed an incubator tracking platform in a small team using PHP, Ajax, and MySQL, designing database schemas from scratch to track startup project metrics, cohort counts, and performance indicators. Built interactive data visualization dashboards using JavaScript and Bootstrap to present key growth and financial metrics to stakeholders. Worked in Agile sprints using Git version control and translated Figma UI/UX designs into responsive, cross-browser frontend components.