Ayaan Khan
Portfolio
A portfolio of engineering stories: the decisions, trade-offs, and product impact behind the work.
Engineering stories
Each story captures the engineering context behind a feature, the path taken to build it, and the outcomes it created.
Implemented at Robonito Engineering to automatically heal web test cases when product interfaces changed, reducing brittle maintenance loops, allowing quick feedbacks via CI/CD and fast release cycles for QA and engineering teams.
Improved resilience while keeping the solution lightweight and cost conscious for large scale day-to-day automation workflows.
Built an event-driven execution pipeline that could accept triggers from different sources, such as GitHub CI/CD, CircleCI, internal schedules, and manual user triggers, normalize them into a common workflow, and reliably route each test to the correct execution environment.
Enabled a highly scalable and highly reliable execution system with fair queueing, resilient retries, and clear failure handling across web, API, and mobile workloads.
Implemented a server-side caching layer with Redis to reduce latency, improve response times, and serve accurate data through a carefully designed eviction policy.
Improved system responsiveness and reduced repeated backend load while keeping cached results reliable and current.
Refactored a large, web-only execution codebase into a unified execution engine for web, API, and mobile flows, making mixed-platform automation possible through a shared orchestration model.
Improved reliability and scalability by separating execution concerns into reusable executors, shared services, and platform-specific adapters instead of a single cluttered flow.
Built an nested expression parser and interpolation engine to resolve variables, invoke random data generators, and fetch values from external data sources for data-driven automation flows.
Improved flexibility and reuse across test flows by making runtime data composition expressive, deterministic where needed, and compatible with nested expressions.
Built an automated release pipeline for desktop applications and multiple microservices, using GitHub Actions to ship builds, publish Docker images, and manage environment-specific deployments with confidence.
Improved release reliability and delivery speed by standardizing CI/CD across desktop, containerized, and server-side components while keeping staging and production flows controlled.
Open source
Selected upstream work across frontend, C++, and systems projects that focused on correctness, resilience, and performance.
Patched framework-level UI and Material Design bugs, notably implementing optimizations for MaterialColor Swatch Map and resolving critical widget-rendering edge cases.
Contributed low-level computational geometry and spatial indexing optimizations, resolving boundary calculations and polygon intersection edge cases in the C++ Boost library.
Patched core routing mechanisms, template compilation rules, and server thread lifecycle behaviors to prevent connection leaks and uncaught exceptions in high-throughput C++ microservices.
Developed and optimized fundamental computer science algorithms in C++, Java, and JavaScript; mentored contributors and reviewed over 100 pull requests for performance and style correctness.
Contact
For collaboration, product engineering, or thoughtful system design work, reach me here.