The Stemly demand planning workspace, with a twelve-month forecast across four plan series
Forecasting model comparison, ranking Random Forest at 92.2% accuracy against three other models
Cash flow planning, with the demand time series broken down by product, site and week

Challenge

Build a modern enterprise SaaS platform for forecasting and optimisation. Easy to learn, trusted by power users and built to turn complex data into clear decisions.

What we did

  • Set the experience vision and product direction
  • Designed the platform structure and core modules
  • Created a bold brand and visual language
  • Built a scalable design system in Figma
  • Designed and shipped a modern marketing site
  • Improved workflows across product and engineering
  • Designed customer support and feedback loops

Results

US$2.5M

Supported the spinoff journey and helped secure seed funding from ING Ventures, EDB New Ventures and other investors.

40%

Efficiency lift after introducing a Figma-based design system and reusable components.

30%

Efficiency gain after setting up Zendesk as the primary support and triage workflow.

stemly

Stemly is a data science platform founded in 2018 as part of ING Bank’s APAC Innovation Lab. Their products help enterprises plan, forecast, and optimise cost and resources using machine learning and advanced optimisation methods. Stemly was recognised as one of the 50 rising startups in Singapore by Tech in Asia in July 2021 and featured in Forbes Asia 100 To Watch 2023 in August 2023.

We joined early to help translate complex forecasting concepts into a product enterprises could actually use. That meant deep domain learning, fast prototyping and building shared language across product, data science and commercial teams, so decisions could move from theory to execution.

The goal was to validate the product with enterprise customers and continuously improve the experience while the team prepared to spin out from ING. Alongside product work, we strengthened the brand, improved collaboration and raised the bar for build quality. That contributed to the company securing US$2.5 million in June 2021 from EDB New Ventures, ING Ventures, Elev8.VC, HH VC Investments and FutureLabs.

Stemly is trusted by Singapore’s prominent investors.

ING Bank
EDB New Ventures
HH Family
Futurelabs Ventures
The Stemly wordmark and its app icon variants
The Stemly app icon in three colourways
Icon set for the platform’s capabilities, from time series and forecasting to audit and measure
A Stemly branded t-shirt

Diagnosed the real problem with enterprise supply chain platforms

Forecasting platforms have been around for decades, with established players like SAP, Oracle and o9 shaping the category. But the experience often lags: heavy UI, steep onboarding and slow workflows that lean on the customer success team to fill the gaps.

Stemly’s opportunity was to build a modern product: a clear, fast interface that enterprise teams could learn quickly, without giving up the accuracy and depth that would drive real savings.

The dated Avercast planning tool: a dense spreadsheet beside a bar chart
The dated SAP planning dashboard, crowded with small charts

Reduced risk with rapid prototyping

For complex products, the fastest way to learn is to prototype and test early. We built interactive prototypes across planning, forecasting and optimisation workflows to validate assumptions before engineering investment.

Prototypes aligned product, data science and commercial teams on what mattered. They also helped sales tell a clearer story and bring back feedback from real enterprise users.

This approach let us iterate quickly, keep scope realistic and design workflows that felt simple even when the underlying models were not.

Demand planning screen comparing forecasting models, with Random Forest best at 92.2% accuracy
Cash flow planning: a time series chart above its underlying table

Developed a platform structure and shared language

Early on, teams had different mental models of how the platform should work. Some were using the same words to mean different things. That’s a fast way to create confusing UI and inconsistent product decisions.

We introduced a term dictionary to define domain concepts and UI naming. For data-heavy products, clarity in language is part of the product experience.

We then shaped the platform structure by studying the SaaS patterns that worked and adapting them to Stemly’s needs. An organisation → workspace → module model gave us a scalable foundation.

Workspace cards for demand planning, replenishment optimisation and cash flow planning
Dialog for creating a new workspace

Delivered a design system built for shipping

To scale quality and speed, we built a design system informed by Google's Material UI 2 and the Vuetify 2 UI framework, tuned for a data-dense enterprise product.

The system was built alongside the brand refresh. It went into the product first, then the marketing site and the interfaces around it.

We focused on reusable, build-ready components mapped to the front-end library, reducing one-off UI and helping engineering ship faster without quality drift.

Sheets from the Stemly design system

Designed buildable products

In data-heavy products, precision is non-negotiable. Naming, behaviour, states and edge cases have to be explicit, or engineering and users will read the same screen differently.

Over time, prototypes shifted from ideal to shippable. To get there, the team kept learning across data science, forecasting and visualisation, so product choices stayed grounded in how the system actually worked.

Dialog for adding time series, with a searchable, filterable list
Dialog for configuring a forecasting model and its retraining schedule

Prioritised enterprise-ready capabilities

Stemly serves enterprise teams with large datasets and high upside from better forecasting accuracy. We prioritised a set of capabilities needed to operate confidently at scale.

Multi-tenancy was core: an organisation/workspace structure designed for data isolation, security and scalable administration.

We then took on identity and access management: users, groups, roles and data permissions. It was a complex area and we simplified it without losing control or auditability.

Finally, we designed connectors for ERP and data integrations via APIs, supporting large volumes and reliable ingestion for real-world enterprise environments.

Member management table listing people, groups and invitation status
Role management table listing permissions and their descriptions

Designed search that makes data usable

In data-first products, search is a workflow of its own. Users need to find the right time series, hierarchy or range quickly, then turn it into charts and tables without friction.

We designed a next-gen search experience that blended speed with control: type-to-search with guided properties across time series, frequency, date ranges and hierarchy, so users could refine without getting lost.

Filtering by geography, drilling from Europe down through the United Kingdom to a single town
Filter results summarised by entity, region and product
Review plan table of monthly measures across a planning horizon
Review plan chart comparing shipping history against customer and commercial plans

Created a bold brand built for trust

As the product matured, Stemly needed a brand that matched the value it delivered. The brand must be credible for enterprise, distinctive in a crowded category, and consistent across product and go-to-market.

We refined the story and visual identity to signal precision and momentum. The calming blue and energising lime palette supported a clear, modern feel, backed by a brand book and asset library for consistent use.

Spreads from the Stemly brand book

Valuable takeaways

Designing for technical experts needs radical clarity. Terminology, behaviour and edge cases are part of the UX, and you cannot design any of it without learning how the system works.

Feature work needs ruthless focus. Aligning on trade-offs early prevents an endless backlog and keeps delivery tied to outcomes, not opinions.

Early-stage teams move faster with constraints. Use proven building blocks for non-core features and invest energy into real differentiation.

Data visualisation looks simple but rarely is. Good charts and tables need clear models, consistent logic and careful interaction design.

Clickable prototypes can close the gap in enterprise sales, especially when procurement cycles are long and stakeholders need to feel confident early.

Credits

Kamil Gottwald
(form-three)

Head of Experience Design

Sanjay Saini

CEO, Co-Founder

Giuseppe Manai

COO, Co-Founder

Rajesh Kutty

Head of Customer Success

Anindya Banerjee

Head of Product

Natalino Busa

Head of Science & Technology

Arianti Silvia

Product Designer

Methods

  • Affinity Mapping
  • Benchmarking
  • Brand Asset Design
  • Branding & Visual Identity
  • Brand Book Design
  • Design Mentorship
  • Design Ops
  • Design Principles
  • Design Sprints
  • Design System
  • Design Thinking Workshops
  • Feature Prioritisation
  • Figma (Software)
  • Low-Fidelity Prototypes
  • Motion Graphics
  • Pattern Libraries
  • Presentation Design
  • Product Design
  • Product Video Creation
  • Prototyping
  • Production-Ready Prototypes
  • Team Leadership
  • Trend Identification
  • UI Components
  • User Experience
  • User Interface
  • User Interviews
  • User Journey
  • User Personas
  • User Research
  • Wireframing