Ashfahan Khan

Built and deployed an internal RAG knowledge tool using LangChain with HyDE retrieval, improving retrieval@5 from ~60% to ~85% via LangSmith evaluation and chunking/embedding tuning. Architected a Svelte design system and component library that accelerated feature rollout by 30%, improved page load times by 20%, and delivered WCAG 2.1 AA-compliant patient-facing interfaces.

Completed 10+ freelance projects focused on performance optimization, accessibility-first UI, and scalable front-end architecture delivered on 2–3 week timelines. Built headless CMS solutions with Contentful and Strapi, implemented AWS Elasticsearch for fast indexing and filtering, and improved UI responsiveness through modular refactoring and reusable component patterns.

Developed a canvas-based document signing system that reduced manual signing time by 50% and refactored legacy class components into functional React for better maintainability. Improved accessibility across enterprise workflows using ARIA, focus management, and keyboard navigation, and built a shared component library with Figma-to-token mappings.

Migrated REST to GraphQL, reducing payload size by 40%, and lowered client-server latency by 30% using RTK Query with a custom GraphQL cache. Built real-time features integrating Pub/Sub and Kafka and delivered verification dashboards and workflows, including accessibility improvements with semantic HTML, ARIA roles, and focus management.

Designed full-stack architecture on Azure Cloud, improving scalability and deployment efficiency by 20%. Integrated Apollo GraphQL with Prisma for type-safe queries, used Apollo Client for caching to reduce redundant API calls, built secure file workflows with Azure Blob Storage, and improved UX by migrating from MDBootstrap to Material UI.

Worked on OPEN-SRP web to ensure healthcare data interoperability and FHIR compliance through international standards implementation. Built scalable Ant Design UI components in a Lerna-based monorepo, applied Flux for multi-store state management, reached ~98% code coverage with Jest tests, and improved accessibility with WCAG-compliant markup and screen reader testing.

Delivered high-priority projects within 2–3 week deadlines by refactoring and reorganizing the codebase into a clean, modular structure. Translated Figma mockups into pixel-perfect React components, standardized component patterns and documentation for handoff/reuse, and enforced TypeScript strict mode with unit tests and code reviews.

Improved maintainability and scalability by decoupling and refactoring legacy UI into reusable modular React components. Converted rough mockups into responsive UI/UX using ReactStrap (Bootstrap), strengthened integration reliability across layers, and ensured cross-browser compatibility through multi-device testing.

Delivered 3+ client projects in parallel with 100% on-time completion and reduced maintenance issues by ~25% by standardizing frontend architecture and scalable coding practices. Mentored 3 junior developers and interns to improve onboarding/task turnaround by ~30%, maintained zero critical defects post-release, and refactored legacy UI into reusable React components.

Maintained 90%+ customer satisfaction while handling 40–50 support tickets daily via Zendesk and improved resolution speed through incident reporting and process documentation. Ensured infrastructure stability by monitoring systems proactively and escalating critical issues to Tier 2 and Tier 3, maintaining complete case documentation for traceability.

Completed a Bachelor in Computer Science at QUSIT in Dera Ismail Khan, Pakistan from Nov 2013 to Nov 2017.