JJ Designs
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Janne Jylhä

Designer / Engineer

Designer

"Hi, I'm JJ. I design user interfaces, SaaS products, websites, marketing materials, and consistent visual brands, all based on design systems."
Janne Jylhä

Engineer

"Beyond design, I also engineer and build design systems, user interfaces, websites and brand assets, leveraging AI where it adds value."
Projects
Statistics
Skills

Latest projects

Neural Mux
WIP

Neural Mux

Complete brand identity and UI/UX/product design for SaaS UI and website for Neural Mux, a cutting-edge AI startup. Modern, tech-forward visual identity and intuitive user interfaces.

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Brand Variations

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Sites and Applications
Velox

Velox

UI/UX redesign for Velox, a marketing materials management portal by Velox, one of Finland's leading marketing logistics providers serving over 140 companies across multiple industries.

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Screens & Flows

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Core Modules
ProjectBuddy

ProjectBuddy

UI refresh for AI-powered project and portfolio management tool. AI, planning, tracking, and reporting tools that help project managers save time and keep teams aligned.

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Screens & Flows

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Components
Rolly

Rolly

UI/UX design for Rolly, a Finnish transport company serving 40,000 customers monthly. An AI-powered platform for automating invoicing, subcontractor settlements, and approvals.

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Screens & Flows

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Core Modules
Intecon

Intecon

UI/UX design for Intecon, a Finnish construction consultancy with 50+ completed projects. An AI-powered EU Taxonomy and ESG platform streamlining sustainability assessments, compliance tracking, and reporting.

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Screens & Flows

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Assessment Areas
LianaUI Design System

LianaUI Design System

A comprehensive enterprise-grade design system, component library, and frontend tech stack built for Liana Technologies, an established international SaaS company serving thousands of customers worldwide, powering its suite of SaaS applications.

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Components and patterns

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Applications
LianaAccount

LianaAccount

A secure and centralized user management system, designed to streamline access across the entire LianaCloud product ecosystem.

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Applications

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Corporate Customers
LianaMonitor

LianaMonitor

A user-friendly media monitoring service, to monitor the important themes related to news, brand, industry, and competitors.

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Features

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Monthly users
LianaAutomation

LianaAutomation

An automation tool to integrate customer data from multiple sources into your marketing automation platform and run effective omnichannel campaigns.

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Features

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Net promoter score
Liana Developer

Liana Developer

Liana Developer site concept and API documentation, that was meant to support integration and development with Liana Technologies products.

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APIs

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Sites
JJ Designs

JJ Designs

A personal design and engineering portfolio website built with Next.js, React, TypeScript, shadcn/ui, Radix UI and Tailwind CSS.

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Themes

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Coffees
UI Sandbox

UI Sandbox

A UI component playground and design system showcase built with Tanstack, React, TypeScript, shadcn/ui, Radix UI, Base UI, Tailwind CSS, MCP, AI, etc. technologies.

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Themes

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Patterns and components

Some brands from older projects…

Toyota
Toyota Motor Corporation
Mazda
Mazda Motor Corporation
Silmäasema
Silmäasema Optician
PAM
Service Union United (PAM)
Balmuir
Balmuir lifestyle brand
Sinebrychoff
Sinebrychoff Brewery
ePressi
ePressi.com
E.T. Listat
E.T. Listat

Skills

Skill Category Level
Design SystemsDesignExpert
Design ThinkingDesignExpert
Design TokensDesignExpert
Rapid PrototypingDesignExpert
System ThinkingDesignExpert
UI/UX DesignDesignExpert
Usability TestingDesignExpert
Web DesignDesignExpert
Design AuditDesignExpert
Component LibrariesDevelopmentExpert
Cross-Browser TestingDevelopmentExpert
Frontend DevelopmentDevelopmentExpert
Mobile ResponsivenessDevelopmentExpert
Single-Page ApplicationsDevelopmentExpert
UI/UX DevelopmentDevelopmentExpert
jQueryDevelopmentExpert
Adobe IllustratorDesignAdvanced
Adobe PhotoshopDesignAdvanced
Atomic DesignDesignAdvanced
BrandingDesignAdvanced
Email DesignDesignAdvanced
FigmaDesignAdvanced
Graphic DesignDesignAdvanced
Journey MappingDesignAdvanced
Logo DesignDesignAdvanced
User FlowsDesignAdvanced
User StoriesDesignAdvanced
Visual DesignDesignAdvanced
Visual HierarchyDesignAdvanced
CSSDevelopmentAdvanced
Email TemplatesDevelopmentAdvanced
JavaScriptDevelopmentAdvanced
JSONDevelopmentAdvanced
LESSDevelopmentAdvanced
ReactDevelopmentAdvanced
VS CodeDevelopmentAdvanced
AI-Assisted DevelopmentDevelopmentAdvanced
Design DocumentationSoft SkillsAdvanced
Design Reviews & CritiqueSoft SkillsAdvanced
Design HandoffsSoft SkillsAdvanced
Product ThinkingSoft SkillsAdvanced
Quality AssuranceSoft SkillsAdvanced
Accessibility (WCAG)DesignProficient
FigJamDesignProficient
Human-Centered DesignDesignProficient
TypographyDesignProficient
User ResearchDesignProficient
Print DesignDesignProficient
WireframingDesignProficient
API DesignDevelopmentProficient
SSO AuthenticationDevelopmentProficient
CursorDevelopmentProficient
Artificial Intelligence (AI)DevelopmentProficient
GitDevelopmentProficient
Localization and InternationalizationDevelopmentProficient
NPMDevelopmentProficient
REST APIsDevelopmentProficient
Tailwind CSSDevelopmentProficient
Web DevelopmentDevelopmentProficient
Cross-Functional CollaborationSoft SkillsProficient
Agile MethodologySoft SkillsProficient
AI Prompt EngineeringSoft SkillsProficient
FlowDevelopmentIntermediate
GraphQLDevelopmentIntermediate
Next.jsDevelopmentIntermediate
PHPDevelopmentIntermediate
SASSDevelopmentIntermediate
SQLDevelopmentIntermediate
ZendeskSoft SkillsIntermediate
GainsightSoft SkillsIntermediate
SentrySoft SkillsIntermediate
Backend DevelopmentDevelopmentBeginner
Lovable.devDevelopmentBeginner
Token StudioDevelopmentBeginner
DockerDevelopmentBeginner
Node.jsDevelopmentBeginner
TypeScriptDevelopmentBeginner
Web ComponentsDevelopmentBeginner
In Finnish

Testimonials

A few words from people I've worked with...

Samuli Tursas

Samuli Tursas

CEO / Liana Technologies

"Having worked with JJ for over 20 years in countless projects, I can wholeheartedly recommend him for anything UI/UX related. He is a rare talent, being able to contribute for the project from the very beginning to a finished product."
Mikael Toivio

Mikael Toivio

Founder / Evermade

"I was impressed by Liana's Design System Frontend that JJ had developed and maintained, all while managing his other tasks. It was visually clean and sharp, and the code was on point. It's rare that an individual can pull it off at the level JJ was doing."
Aharon Pelz

Aharon Pelz

Senior Product Designer / Liana Technologies

"JJ's approach to web design, app design, and branding, rooted in a deep understanding of design systems, is truly inspiring, both as a designer and as a mentor. He elevates as much as he challenges, pushing ideas toward their highest-value outcomes."
Mirva Härmä

Mirva Härmä

CEO / ProjectBuddy

"I tried to make a reasonable and cost-effective decision by cutting UI design costs and doing it myself. In the end I would have saved both time and money if I had invested in JJ's professional design from the start."
Designer
Engineer

Need design and development?

From early-stage concepts to production-ready products, I combine creative design with hands-on technical UI/UX execution. Whether you're launching a startup, refreshing a legacy app, building a website, or creating the next big thing, I can help bring it to life. Let's make it happen!

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