Mariusz Cieśla - Resume

Staff Design Engineer - Contentsquare (2026 - Present)

Focused on interface quality, designer enablement, and practical tooling workflows that help teams ship clearer, more consistent product experiences.

• Improving interface quality across product surfaces through systems, patterns, and design-engineering collaboration
• Turning new tools into practical workflows that increase exploration speed without lowering implementation quality
• Partnering with design, product, and engineering teams to translate standards into usable product patterns

Key skills: Interface Quality, Modern Tooling, Design Engineering, Design Systems, Designer Enablement, Product UX

Principal Product Designer - LILT (2025 - 2026)

Led product design work for enterprise localization, connecting user research, agentic interfaces, and coded prototypes to move ideas from concept to beta.

• Used modern design and coding tools to speed up exploration, prototyping, and product decision-making
• Designed automated workflows around trust, transparency, and clear user control instead of novelty
• Created scalable systems and processes that increased product quality while reducing coordination drag
• Led product design strategy for agentic interfaces across complex enterprise workflows
• Worked closely with engineering and product teams to turn prototypes into cohesive shipped experiences

Key skills: Modern Tooling, Product Strategy, Design Systems, User Experience, 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.

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

Key skills: 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.

• Built cross-functional design system (Figma + Storybook + docs) that aligned teams and reduced UI-related issues to near-zero
• Designed complex workflows that simplified project lifecycles without sacrificing power for expert users
• Led design for a translation agent, focusing on trust, transparency, and collaborative automated workflows
• Collaborated on product roadmap and user research initiatives across multiple product areas

Key skills: Design Systems, AI/ML Product Design, Workflow Design, User Research, Accessibility

Product Designer & Consultant - Freelance & Agencies (2013 - 2020)

Embedded with product teams, agencies, and enterprise clients across industries where the work required strategy, UX, visual craft, and implementation fluency.

• Delivered design solutions for fintech, e-commerce, media, and enterprise software
• Partnered with design agencies on large-scale digital transformation projects
• Provided UX strategy and design system guidance for enterprise clients
• Embedded with product teams to improve design processes, collaboration, and shipped interface quality

Key skills: UX Strategy, Digital Transformation, Enterprise Design, Process Optimization

Head of Design - anynines (2014 - 2020)

Led design across cloud platform products, design systems, developer experience, and growth experiments with marketing and engineering teams.

• Created and maintained coherent style guides and design systems across multiple product teams
• Ensured design consistency and standards across different departments and initiatives
• Worked closely with Marketing team on new growth initiatives and strategic experiments
• Built systematic approaches to testing, learning, and iterating on growth strategies

Key skills: 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.

• From hypothesis to launch, scaling to 10K+ users, and eventual wind-down
• Designed and ran concierge MVP, monetization models, and internationalization efforts
• Created complete brand identity, user experience, and front-end development
• Collaborated on 2-season TV documentary series with Planete+ showcasing user journeys
• Achieved global press coverage (Forbes, Fast Company) and expansion to multiple countries

Key skills: 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.

• Developed and delivered courses on visual design and digital product development
• Integrated real-world case studies and hands-on projects into academic curriculum
• Connected academic learning with current industry practices and trends
• Guided students through design projects and career development

Key skills: Education, Curriculum Development, Mentoring, Visual Design, Workshop Facilitation

Lead Designer (Contract) - LILT (2015 - 2017)

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

• Created the original design system that laid the groundwork for future product evolution
• Designed interfaces specifically for translators, who were the primary users at the time
• Worked closely with engineering and stakeholders to deliver new product initiatives
• Helped shape the product direction during critical early growth phase

Key skills: 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.

• Owned both interface design and front-end code implementation
• Worked directly with users to understand their workflow needs and pain points
• Led design decisions and interface development for the entire platform
• Collaborated with internal stakeholders to align product vision with user needs

Key skills: 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.

• Designed and implemented user interfaces from concept to production
• Worked extensively with Ruby on Rails applications and MVC architecture
• Utilized Sass and modern CSS techniques for maintainable stylesheets
• Worked directly with clients to translate requirements into functional interfaces

Key skills: 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.

• Developed custom applications for large enterprise and government clients
• Worked with Microsoft .NET framework for web application development
• Implemented user interfaces using HTML, CSS and JavaScript
• Gained valuable experience working in the Norwegian market

Key skills: .NET Framework, HTML/CSS, JavaScript, Enterprise Applications, Government Projects

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
• Modern tooling: coded prototyping, design automation, workflow design

Prototype Early

First drafts are hypotheses. I use working prototypes to make tradeoffs visible before polish hides the weak spots.

Make Reasoning Visible

Good design decisions can be defended. I keep the why clear so teams can move fast without losing judgment.

Use the Whole Stack

Research, systems, code, analytics, and modern tooling are all part of the work when the goal is a product people can actually use.

Measure Outcomes

Screens are output. I care about what changed: activation, quality, speed, comprehension, trust, and the team's ability to ship the next thing.