about this project
This project describes the process of building a financial date-picker as a part of D.E.Shaw's component library. This work has been bound by an NDA, please get in touch with me for details.
DESIGNING A MODULAR DATE-PICKER COMPONENT
DEFINITION
Worked with design leads, infra and pattern library developers, and high-priority business units
Clarified core and advanced requirements, with special attention to finance team needs
Aligned on an MVP that would solve the most urgent cases while laying groundwork for future expansion
RESEARCH & ANALYSIS
Heuristic analysis of existing date pickers in legacy tools
Competitive benchmarking of tools like Airbnb, MakeMyTrip, Google Analytics, and data dashboards
User interviews across business roles to surface specific interaction pain points
Mapped all requested features, then prioritized them based on frequency, criticality, and ROI
DESIGN STRUCTURE & STRATEGIES
To support varied and evolving needs without causing dev fatigue, I built a component system inspired by atomic design logic, for example:
Atoms: text labels
Molecules: input boxes
Cells: selection interfaces (like input plus selected value)
Blocks: grouped inputs and selection logic
Organisms: full flows for selection, presets, submission, and context management
This gave developers modular, swappable pieces they could assemble or extend without redesigns.
Example: A finance team needing “last 7 days of every month” could combine existing blocks to enable this logic without asking for a new component.
Other key strategies included:
Layered complexity
Users had different levels of financial fluency. The UI showed simple selections by default, with expandable advanced options for power users.
Interaction clarity
The picker had two clear axes:
What is being selected (date, month, year)
How it’s selected (single, range, or discreet set)
Smart defaults and intuitive shortcuts
Defaults were tuned to common flows, like single-date selection. Familiar patterns (Command+Click to select multiple dates) kept the interface fast and learnable.
DESIGN CHALLENGES
Context switching
Switching between selecting dates, months, or years felt abrupt or unclear
Familiarity vs learning curve
New functionality introduced new interactions, which could slow down onboarding and adoption
Flexibility vs cognitive load
The more power we offered, the harder it became to keep things clean and clear
Usability vs ROI
Some ideal UX solutions weren’t worth the dev effort or couldn’t be shipped as part of the MVP
I navigated these through multiple feedback loops, user tests, and iterations. Each step helped refine the balance between power and usability, and ensured the component could ship on time with justifiable effort.
OUTCOME
Shipped as part of the central pattern library with full documentation and theme support
Used across finance and HR platforms with minimal developer intervention
Developers began assembling tailored versions using predefined blocks
Usability improved with fewer errors, smoother selections, and more user confidence
