UX engineering services for UK SaaS products and digital platforms.
Most UX problems are symptoms of something deeper.
A new visual design will not fix a broken information architecture. Faster load times will not fix a navigation structure that confuses users. Changing the button colour will not fix a product that asks users to do too much before it gives them anything in return.
When a SaaS product has low engagement, high churn, or frustrated users, the visible problem is rarely the real one. The real one is buried in how the product is structured, how it asks users to think, and what it expects them to do before they get to the thing they actually came for.
UX engineering services exist to find that real problem. Not to make the product look better. To make it work better for the people who have to use it every day.
Have a question? Jump to FAQs.
Does any of this sound familiar?
You built the core feature. Users find it eventually and if they find it at all. Most drop off before they get there.
Your support inbox is full of questions that the product should be answering on its own. The same questions, every week.
You already paid for a redesign. The product looks better. Users are still confused. The complaints are still coming.
You dread the sales demo. The product does not show well to someone seeing it for the first time.
New users need hand-holding to get through onboarding. Without it, they go quiet and never come back.
You know something is wrong. You just cannot pinpoint what. Every fix you ship feels like treating a symptom, not the cause.
What we do.
SaaS UX audit
We start with a full audit of your product. Not a surface review of the visual design. A structured analysis of how users move through the product, where they stall, where they leave, and what the underlying architecture is asking them to do.
You will leave the audit with a documented list of exactly what is broken, ranked by impact, before you spend a penny on redesign.
You receive a documented findings report with a prioritised list of what is broken and why, before any redesign work begins. This is the starting point for every engagement. We do not redesign before we understand.
Redesign grounded in research
Once the audit is complete, we redesign the flows that are causing the most damage. Every change is traceable back to a specific finding. Your team can see why each decision was made, not just what changed. This matters when you are presenting the work internally or defending the investment to a board.
Front-end rebuild
Design that cannot be built is not design. It is a file. Our UX team works directly with front-end developers throughout the build phase, not in a separate handoff. We understand React component architecture, design systems, and the constraints your developers are working inside. The result is a product that matches the design, not a compromise version of it.
Complex dashboard, B2B SaaS, and AI-driven product UX
Data-heavy interfaces, multi-role platforms, and AI-powered products require a different approach to UX. The same patterns that work for a simple consumer app do not work when a logistics manager needs to process 40 jobs before lunch, or when a product uses AI to surface decisions a user has to understand and trust. We have designed and rebuilt these environments, including AI-powered products across property operations, home care, and consumer apps. We know where they break and why.
Scalable design systems
A design system is not a style guide. It is the foundation that lets a product evolve without falling apart visually or structurally. We build component libraries and design systems that your team can build on top of, extend, and hand to a new developer without a briefing session.
What we have fixed.
C4 Logistics
Portal redesign across three user types
C4 Logistics runs a time-critical transport platform with three interconnected portals: admin, supplier, and customer. Each had grown outdated, cluttered, and slow to navigate.
The audit found the problem was not the data. It was the structure around it.
326 screens
Redesigned across three portals40%
Reduction in job processing time3 months
From kickoff to launchRetainer
Same team stayed on post-launchWhat we found
- Fragmented information architecture across 326 screens
- Missing CTA structures throughout all three portals
- Inconsistent branding with no unified design system
What we did
- Rebuilt the information architecture from the ground up
- Replaced navigation structure with a unified sidebar system
- Applied WCAG-compliant accessibility standards throughout
How a UX engineering engagement works.
Every engagement starts with the audit. We do not skip to redesign because the timeline is tight or because the client already has a hypothesis about what is broken. The audit is what makes the redesign work.
Discovery and UX audit
We analyse how users move through your product. Stakeholder interviews, heuristic review, user flow analysis, and a screen-by-screen assessment of where the product is creating friction. We are looking for the structural problems, not the visual ones.
DELIVERABLES
- UX audit report
- Prioritised findings
- Annotated screen review
Information architecture and wireframes
We restructure the product before we redesign it. New navigation architecture, reorganised user flows, and wireframes that show exactly how the changes will work before any visual design begins. This is where the real decisions are made.
DELIVERABLES
- Revised information architecture
- Low-fidelity wireframes
- Flow diagrams
UX and UI design
Visual design built on the restructured architecture. A component-based approach so every screen is consistent and every design decision is reusable. Clickable prototype for stakeholder review and user testing before the build begins.
DELIVERABLES
- Full UI design
- Interactive prototype
- Design system and component library
Front-end build and QA
Design and engineering work in parallel, not in sequence. Our UX team is involved in QA, testing every screen against the flows defined in phase two. Not just whether it looks right, but whether it works right for the person using it.
DELIVERABLES
- Built and tested front end
- Design-to-code review
- Deployment
Many clients move to a dedicated UX designer or frontend developer on a monthly retainer after the initial engagement. The same person who ran the audit and built the design system stays on the product. No loss of context, no re-briefing.
This is not a visual redesign.
Most redesigns make the product look better. They do not make it work better.
What a visual redesign does
What UX engineering does
Most SaaS products that come to us have already had a visual redesign done by someone else. It made the product look better. Six months later the support tickets were still coming in about the same things, because user experience engineering addresses the structural problem, not the visual one.
If users are still frustrated after a redesign, the issue is structural. That is what our UX engineering for software products process finds and fixes.
Why UK product teams choose Exline Labs for UX engineering.
We find the real problem, not the visible one
Our audit is not a checklist. It is a structured investigation into why users behave the way they do inside your product. The findings report gives you a prioritised list of what is broken and why, before any design work begins. Every redesign decision traces back to a specific finding.
Design and engineering work together
Our UX designers understand front-end architecture. They know what React components can and cannot do. They design inside real constraints, not ideal ones. The result is a product that is built to spec, not a compromised version of the design.
The same team stays on the product
The designer and developer who run the audit are the ones who rebuild the product. No handoffs, no loss of context, no new team member who needs three weeks to get up to speed. If you move to a retainer post-launch, the same people stay embedded in your team.
We come prepared to every call
Before your discovery call, we have already reviewed your product, identified the obvious friction points, and formed a point of view. You do not get a list of questions. You get observations from a team that has done its homework.
What does a UX engineering engagement cost?
The honest answer depends on the scope. A UX audit for a single user flow is a different engagement to a full platform redesign and rebuild across three user types. Both are priced differently and both start in the same place: the discovery call.
What shapes the cost
The number of user roles, the number of screens in scope, whether the engagement includes front-end rebuild or design only, and the complexity of the information architecture problem.
What you will always get before any work starts
If you want to start with the audit only before committing to a full redesign,
that is a conversation we can have. Many engagements start that way.
Every month this stays unfixed is costing you.
The gap between what your product can do and what users believe it can do gets wider every week you leave it unfixed. A product with a broken user experience does not just frustrate users. It loses them. Churn compounds. Support costs rise. Sales demos underperform.
The founders who have brought UX engineering problems to Exline Labs have all come back. Not because every project was straightforward, but because we found the actual problem, communicated what we were doing and why, and delivered something that users could navigate without friction. That record is public. Fifteen reviews on Clutch. All verified. All 5.0.
If something is broken, the right time to fix it was the last time a user left because of it.
Don't take our word for it.
Germany
Communication was always followed up and deliveries were on time. They were always available for additional help and support. This is not what I experienced with the agency I used before - with Exline I always knew exactly where the project stood.
Christian Mühle
Managing Director of IDEA Data Solutions GmbH
Ready to find out what is actually broken?
Tharsh Thangavadivel
Founder, Exline LabsBefore your discovery call, we review your product and come prepared with findings, not just questions.
Not ready to call yet?
Tell us about your project.
We will review what you send and come back to you within one working day.
01
We review your product and identify the obvious friction points before responding.
02
You receive initial observations, not a sales pitch.
03
If it looks like a fit, we suggest a discovery call. No pressure, no obligation.
Still have questions?
What is a UX audit and what does it include?
A UX audit evaluates your website or app's usability, clarity, and design effectiveness. We assess user journeys, accessibility, conversion paths, and make actionable recommendations.
How does UX design increase conversions?
Good UX design removes friction from the user journey, clarifies actions, and guides visitors toward key goals like signups or purchases — improving conversion rates significantly.
What's the difference between UX and UI design?
UX focuses on the overall user journey and experience, while UI is the visual layout and interaction. We combine both to create seamless and visually compelling digital products.
Do you build scalable design systems for startups?
Yes, our design system development services are ideal for startups preparing to scale. We create reusable components and documentation to support fast, consistent growth.
Can you design for both mobile and desktop platforms?
Absolutely. Our mobile UI design approach ensures your product is responsive, intuitive, and optimized for small screens as well as large displays.
What is a UX audit and what does it include?
A UX audit evaluates your website or app's usability, clarity, and design effectiveness. We assess user journeys, accessibility, conversion paths, and make actionable recommendations.
What's the difference between UX and UI design?
UX focuses on the overall user journey and experience, while UI is the visual layout and interaction. We combine both to create seamless and visually compelling digital products.
Can you design for both mobile and desktop platforms?
Absolutely. Our mobile UI design approach ensures your product is responsive, intuitive, and optimized for small screens as well as large displays.
How does UX design increase conversions?
Good UX design removes friction from the user journey, clarifies actions, and guides visitors toward key goals like signups or purchases — improving conversion rates significantly.
Do you build scalable design systems for startups?
Yes, our design system development services are ideal for startups preparing to scale. We create reusable components and documentation to support fast, consistent growth.