UI/UX design services for new and established SaaS, through to working software
Tcules is a product design studio for SaaS teams. UI/UX design leads every project, and when it also builds, the same designers stay with it until release, so nothing gets lost between design and code.
2017
Founded
90+
Projects
19
Countries with clients
Some of the teams we've worked with
Doodle · Dealpath · Benchmark Gensuite · Eden AI · ConnectX · JoVE · Ringier Media Switzerland
Which design or development service do you need?
Seven services and our audits, each with its own page. Most projects draw on two or three of them.
Product Design
Working out what a product should do and how it should work, at any stage
What you come away with
Research, workflows, interface design and tested prototypes
Design-led MVP Development
Turning an idea, a concept or an AI-built prototype into an MVP
What you come away with
A first release customers want to use, taken through to launch if you choose
Product Modernisation
Software customers rely on daily, whose screens and code show their age
What you come away with
A product changed part by part while customers keep working, with their habits kept
Design Systems
Teams whose buttons, spacing, Figma files and code have drifted apart
What you come away with
One set of components and rules in Figma and in code, so design and code match
AI Product UX
Adding AI that answers, drafts, checks or acts for your users
What you come away with
What the AI does, and how people follow, steer, check and correct it
Design Engineering
Trying risky interactions in code before committing to them
What you come away with
Working prototypes, and interface code that keeps to the design from first prototype to production
Software Development
Products that need building as well as designing
What you come away with
Frontend, backend, integrations, testing and release, with designers alongside until release
Audits & Assessments
Teams that agree something is wrong and disagree on what
What you come away with
The cause found and the fixes ranked, before you fund the work
Product Design can also be hired in parts: user research, workflows and structure, interface design, prototypes and usability tests and data visualisation.
Software Development covers web apps, major features and care of a live product, plus AI Product Engineering and Mobile App Development.
A new AI product often brings Product Design, AI Product UX and Software Development together.
Selected design and development work
Three products, each drawing on a different mix of our services.
ConnectX: an AI energy product, idea to live use
We defined this building-energy product around eight scenarios drawn from the questions its users ask, then proved it in a coded demo on sample data. We then carried the demo into a production-ready module that went live in late 2025.
Eden AI: one search box, with AI help kept separate
Developers on Eden AI's platform can begin a workflow three ways: from a template, from scratch or with the AI's help. Our redesign brought all three into one search box, made AI help a mode you enter on purpose, and gave Eden's own developers specs to build from.
Gold Image Printing: a print store and its production system redesigned together
We watched production staff use the existing system, then redesigned the web-to-print store and the internal ERP on a single component set and style guide. The design gives each order one shape from checkout through artwork, scheduling and fulfilment, and we worked with the client's technical team on implementation.
What clients say
Three ways to work with us
Not sure which suits you?
Tell us about the product, and we'll suggest one.
Why founders and product teams choose Tcules
Fluent in SaaS
Roles, permissions and data-heavy screens need no explaining to us.
Idea to launch
Bring an idea or your own prototype. Designers lead it through to launch.
Craft people notice
Your product stands out from lookalike software and feels effortless to use.
Evidence before screens
We test your assumptions with real users before they become expensive mistakes.
Seen your problem before
Senior designers who've solved problems like yours lead your product and do the work.
Start small
An optional fixed-price pilot lets you try us first, and ongoing work has no minimum term.
Tell us the problem, we'll suggest the mix
Not sure which service you need? Skip the menu. Describe what you're creating or changing, and we'll work out with you where to start.
Questions about choosing UI/UX design and development services
Do we need to know which service we want?
No. Tcules recommends the service, or mix of services, once you describe the product, where it is heading and what is hard. A few lines will do, and you don't need our service names.
Can you take a new SaaS product from idea to launch?
Yes. Our end-to-end product development services take new SaaS products from first definition to a launch-ready first release, as Design-led MVP Development explains. Already have a working prototype? A Prototype Readiness Review shows what it needs before customers arrive.
Can we start with an audit or one workflow?
Yes. Tcules treats one workflow, a feature or a focused audit as a strong first step. It runs as a pilot project, so you see how we think about your product before planning anything bigger. How pilots work
What is the difference between Product Design and Design Engineering?
Product Design works out what the product does and how it works, through research, workflows and interface design. Design Engineering takes that work into code, so a risky interaction can be tried in a running product and the production interface keeps to the design. The two often run side by side on one project.
Design Systems or Product Modernisation: which do we need?
Choose Design Systems when the trouble is inconsistency: the same button built five ways, or Figma and code drifting apart. Choose Product Modernisation when workflows and technology have aged and need changing in stages. A modernisation can start from a shared component layer, as Benchmark Gensuite's did.
Should we hire one studio for design and development, or two suppliers?
Separate suppliers suit a finished design that only needs building, but gaps can open before release. Our design with your engineers suits a strong in-house team, as long as someone answers the product questions that land on engineers mid-build; at Dealpath, its own team owned implementation.
One studio suits new products and designs still moving once code starts, with the code we touch agreed early.
How much do UI/UX design and development services cost?
The cost depends on what is designed and built, and how much of it. Each engagement gets its price before any work begins, based on the scope you agree with us. How pricing works