# UX/UI optimization for SaaS and mobile apps

> UX/UI optimization for SaaS and mobile apps: user journeys, design systems, user research and UX writing. Award-winning work recognized by OCTAS, Osentreprendre and Gartner.

URL: https://viesigners.com/en/product-design/
Last updated 2026-10-09

We helped an international scale-up secure $320M+ in funding and won prestigious awards for launching and optimizing apps (OCTAS, Osentreprendre, Gartner).

## At a glance
- Who it's for: SaaS companies, scale-ups and mobile app makers.
- What you get: optimized user journeys, a design system, user research and UX writing.
- Proof: $320M+ in funding secured by a scale-up we supported; OCTAS, Osentreprendre and Gartner recognition.
- Collaboration: we work hand in hand with your internal teams, in iterative phases.

We rework the experience of your SaaS and apps to turn them into world-class assets that engage your users, free up your internal teams and win over your investors.

A product is judged within minutes: does the user understand the value, reach a first success, and have a reason to come back? Onboarding, screen clarity and design system consistency directly drive activation, retention and customer lifetime.

## What we design and optimize

- **User journey optimization** — Delivered in iterative phases that account for technical debt: we ship value without freezing your roadmap.
- **Design systems** — A world-class design system: components, principles and documentation that speed up your teams and keep everything consistent.
- **User research and benchmarking** — Interviews, usability tests and competitive analysis to inform your decisions with facts.
- **UX writing** — Interface copy that gives your product personality without losing clarity.
- **Onboarding and activation** — Simplifying onboarding and the experience to increase loyalty and extend customer lifetime.
- **Collaboration with your internal teams** — Seamless: shared tools, polished developer handoffs and rituals aligned with your work cycles.

## An iterative, measurable approach

1. **Discovery and audit** — We analyze your product, your usage data and your technical constraints.
2. **Research and hypotheses** — We validate real user needs and form testable hypotheses.
3. **Iterative design** — We design, test and refine in phases, collaborating with your teams.
4. **Delivery and measurement** — We support implementation and measure the effect on activation and retention.

- **$320M+** in funding secured by an international scale-up we supported
- **+48%** conversions for the Pharmy clinical trial search platform
- **Top 3%** of the world's web experts, according to Toptal

## Frequently asked questions about product design

### What does UX/UI optimization for a SaaS or app include?

It covers journey analysis, user research, redesign of key screens, UX writing, creating or improving a design system, and support during implementation. We first target what has the greatest effect on activation and retention.

### Do you work with our internal teams?

Yes. We collaborate with your designers, developers and product managers, and adapt our deliveries to your tools and work cycles to free up your teams rather than slow them down.

### What is a design system and do I need one?

A design system is a library of components, rules and documentation that keeps the interface consistent and speeds up development. It pays off as soon as several people or teams work on the same product.

### How do you measure UX improvement?

We define indicators with you before starting (for example activation, a journey's conversion rate or retention) and track them after implementation. For the Pharmy platform, optimization led to a 48% increase in conversions.

### Do you also design mobile apps?

Yes, we design and optimize the experience of mobile apps as well as web SaaS platforms. See our work.

## Ready to build a world-class UX?

Let's talk about your product: we'll find the most profitable experience gains.