Mariusz Ciesla

    Principal Product Designer

    Berlin, Germany

    About

    Product designer and curious generalist with over a decade of experience. I specialize in design systems, user experience research, and collaborative design processes. I've worked with product teams, agencies, and consulted for large corporates, always focusing on continuous improvement and purpose-driven design.

    Experience

    Principal Product Designer

    LILT

    2025 - Present

    Focused on exploring AI tooling capabilities and building user-centered design solutions that bridge human creativity with AI efficiency. Leading strategic design initiatives to enhance product experiences through innovative AI-powered workflows.

    • AI Tooling Innovation: Exploring and implementing cutting-edge AI tools to enhance design workflows and product development velocity
    • User-Centered Solutions: Building intuitive design solutions that prioritize user needs while leveraging AI capabilities for enhanced experiences
    • Efficient Design Systems: Creating scalable design systems and processes that maximize impact while minimizing complexity
    • Strategic Design Leadership: Leading product design strategy with focus on AI integration and human-centered innovation
    • Cross-functional Collaboration: Working closely with engineering and product teams to deliver cohesive AI-enhanced user experiences
    AI Tooling
    Product Strategy
    Design Systems
    User Experience
    Innovation
    Strategic Design

    Senior Manager, Product & Design

    LILT

    Apr 2024 - 2025

    Led cross-functional Product & Design teams to accelerate delivery, adoption, and customer impact for the AI-powered translation platform.

    • Team Leadership: Led cross-functional Product & Design teams to accelerate delivery, adoption, and customer impact
    • Brand & Design System Ownership: Owned brand, visual identity, and Design System, ensuring global consistency and market differentiation
    • Process Optimization: Streamlined internal & partner collaboration, cutting project turnaround times while elevating quality
    • Strategic Prototyping: Designed and shipped high-impact prototypes enabling rapid iteration and early market validation
    • Research Leadership: Directed user research to inform strategic product decisions and boost retention
    • AI Innovation: Pioneered AI-driven design workflows (Cursor, Figma MCP), increasing design velocity and reducing engineering bottlenecks
    Design Management
    Team Leadership
    Design Systems
    AI Workflows
    User Research
    Brand Strategy

    Senior Product Designer

    LILT

    2020 - 2024

    Led design initiatives across multiple product areas for the AI-powered translation platform.

    • Design System Leadership: Built cross-functional design system (Figma + Storybook + docs) that aligned teams and reduced UI-related issues to near-zero
    • Workflow Design: Designed complex workflows that simplified project lifecycles without sacrificing power for expert users
    • AI Agent UX: Led design for AI-powered translation agent, focusing on trust, transparency, and collaborative human-AI workflows
    • Product Strategy: Collaborated on product roadmap and user research initiatives across multiple product areas
    Design Systems
    AI/ML Product Design
    Workflow Design
    User Research
    Accessibility

    Product Designer & Consultant

    Freelance & Agencies

    2013 - 2020

    Worked with various product teams, agencies, and consulted for large corporates across different industries.

    • Cross-industry Experience: Delivered design solutions for fintech, e-commerce, media, and enterprise software
    • Agency Collaboration: Partnered with design agencies on large-scale digital transformation projects
    • Corporate Consulting: Provided UX strategy and design system guidance for enterprise clients
    • Team Integration: Embedded with product teams to improve design processes and collaboration
    UX Strategy
    Digital Transformation
    Enterprise Design
    Process Optimization

    Head of Design

    anynines

    2014 - 2020

    Created and maintained coherent style guides and design systems across different teams, while collaborating with Marketing on growth initiatives and experimentation frameworks.

    • Design System Leadership: Created and maintained coherent style guides and design systems across multiple product teams
    • Cross-team Collaboration: Ensured design consistency and standards across different departments and initiatives
    • Growth Marketing: Worked closely with Marketing team on new growth initiatives and strategic experiments
    • Experimentation Framework: Developed and implemented systematic approaches to testing and iterating on growth strategies
    Design Leadership
    Developer Experience
    Enterprise Design
    Cloud Platforms
    Design Systems

    Co-founder & Product Designer

    Lifetramp

    2014 - 2018

    Co-founded and led product design for a mentorship marketplace that let people "test-drive" careers for a day.

    • End-to-end Product Leadership: From hypothesis to launch, scaling to 10K+ users, and eventual wind-down
    • Strategic Experiments: Designed and ran concierge MVP, monetization models, and internationalization efforts
    • Brand & Product Design: Created complete brand identity, user experience, and front-end development
    • Media Partnership: Collaborated on 2-season TV documentary series with Planete+ showcasing user journeys
    • Global Impact: Achieved global press coverage (Forbes, Fast Company) and expansion to multiple countries
    Product Strategy
    Brand Identity
    Growth Experiments
    Community Building
    Prototyping

    Visiting Lecturer

    AGH University of Science and Technology

    2016 - 2020

    Delivered lectures and workshops on visual design, sharing practical experience with the next generation of designers.

    • Curriculum Development: Developed and delivered courses on visual design and digital product development
    • Practical Learning: Integrated real-world case studies and hands-on projects into academic curriculum
    • Industry Bridge: Connected academic learning with current industry practices and trends
    • Student Mentoring: Guided students through design projects and career development
    Education
    Curriculum Development
    Mentoring
    Visual Design
    Workshop Facilitation

    Contract Designer

    LILT

    2015 - 2017

    Built the original design system for LILT and collaborated with engineering and stakeholders on new initiatives for translators.

    • Design System Foundation: Created the original design system that laid the groundwork for future product evolution
    • Translator-Focused Design: Designed interfaces specifically for translators, who were the primary users at the time
    • Cross-functional Collaboration: Worked closely with engineering and stakeholders to deliver new product initiatives
    • Early-Stage Product: Helped shape the product direction during critical early growth phase
    Design Systems
    User-Centered Design
    Cross-functional Collaboration
    Early-Stage Product

    Lead Designer & Front-end Developer

    Kanbanery

    2009 - 2013

    Designed and developed the interface for an online kanban board platform, working directly with users and internal stakeholders.

    • Full-Stack Design: Owned both interface design and front-end code implementation
    • User Collaboration: Worked directly with users to understand their workflow needs and pain points
    • Product Leadership: Led design decisions and interface development for the entire platform
    • Stakeholder Management: Collaborated with internal stakeholders to align product vision with user needs
    Product Design
    Front-end Development
    User Research
    Interface Design
    Kanban/Agile

    Front-end Developer & Designer

    Lunar Logic

    2008 - 2013

    Designed and developed user interfaces for web applications using Ruby on Rails, HTML, CSS, Sass and JavaScript.

    • Full-Stack Development: Designed and implemented user interfaces from concept to production
    • Ruby on Rails: Worked extensively with Ruby on Rails applications and MVC architecture
    • Modern CSS: Utilized Sass and modern CSS techniques for maintainable stylesheets
    • Client Collaboration: Worked directly with clients to translate requirements into functional interfaces
    Ruby on Rails
    HTML/CSS
    Sass
    JavaScript
    Interface Design

    Front-end Developer

    Making Waves (now NoA Ignite)

    2007 - 2008

    Worked with enterprise and government customers in Norway on custom application development using .NET framework and web technologies.

    • Enterprise Applications: Developed custom applications for large enterprise and government clients
    • .NET Framework: Worked with Microsoft .NET framework for web application development
    • Client-Side Technologies: Implemented user interfaces using HTML, CSS and JavaScript
    • International Experience: Gained valuable experience working in the Norwegian market
    .NET Framework
    HTML/CSS
    JavaScript
    Enterprise Applications
    Government Projects

    Core Skills

    Design & Strategy

    Product Design
    Design Systems
    User Research
    Product Strategy
    Information Architecture

    Collaboration

    Cross-functional Teams
    Agile/Shape Up
    Design Sprints
    Stakeholder Management
    Mentoring

    Technical

    Figma
    Prototyping
    HTML/CSS
    Accessibility
    Analytics
    Claude Code
    Gemini CLI
    Cursor
    Lovable
    Onlook
    Subframe

    Design Philosophy

    Kaizen

    Continuous improvement through small, incremental changes. Getting 1% better every day creates lasting transformation.

    Purpose-Driven Design

    Understanding the 'why' behind every decision. Great design solves real problems and creates meaningful experiences.

    Collaborative Growth

    The best learning happens together. I value feedback, diverse perspectives, and collective wisdom.

    Innovative Solutions

    Seeing beyond conventional solutions. Innovation comes from questioning assumptions and exploring new possibilities.

    Languages

    English

    Fluent

    Polish

    Native

    German

    Conversational