Sameera Thilakasiri

Product Manager

Bristol, England, United Kingdom23 yrs 6 mos experience

Key Highlights

  • Over 20 years in UI/UX design.
  • Led design for user-centric expense management tools.
  • Co-founded Sri Lanka's first national open-source design system.
Stackforce AI infers this person is a seasoned UX/UI designer specializing in SaaS and government digital services.

Contact

Skills

Core Skills

User Experience DesignUx ResearchUser Research

Other Skills

Agile MethodologiesTask AnalysisConstructive FeedbackUser ScenariosProblem SolvingUsability TestingStrategyStakeholder ManagementCustomer JourneysWorkshopsPrototypingUser Story MappingExperience DesignAccessibilityInformation Architecture

About

Experienced Product Designer | UX/UI Specialist | Making Complex Systems Simple Through Human-Centered Design. With over 20 years in UI/UX design, I transform complex digital challenges into intuitive, accessible solutions that deliver measurable business impact. Currently serving as Product Designer at Webexpenses, I lead the design of user-centric expense management tools that simplify workflows and drive engagement. My approach combines deep user research, data-driven insights from tools like Pendo, and collaborative cross-functional partnerships to create digital experiences that truly serve both user needs and business objectives. Recent highlights include launching our beta Business Expenses Card program, backed by comprehensive user feedback and analytics. As an HFI Usability Analyst, I'm passionate about humanising technology through empathetic design and continuous experimentation. I thrive on solving difficult problems by integrating the full UX lifecycle—from research and ideation to implementation and measurement through OKRs. What drives me: Creating sustainable, accessible solutions that enhance how people interact with digital products, particularly in complex system environments where thoughtful design can make the greatest difference. Open to connecting with fellow designers, product leaders, and anyone passionate about user-centered innovation.

Experience

23 yrs 6 mos
Total Experience
2 yrs 9 mos
Average Tenure
2 yrs 7 mos
Current Experience

Webexpenses

Product Designer

Oct 2023Present · 2 yrs 7 mos · Witney, England, United Kingdom · Hybrid

  • Strategic Product Leadership
  • Serve as sole product designer for Webexpenses SaaS platform (100,000+ mobile users), owning end-to-end UX strategy and collaborating across engineering, product, customer success, and sales
  • Conducted heuristic audit identifying 50+ usability issues, prioritising improvements based on business impact and systematically addressing findings through platform redesign
  • Established data-driven practice using Pendo analytics to monitor user behaviour, product adoption, support tickets, and sentiment—informing iterative improvements
  • Corporate Card Program (Flagship Initiative)
  • Led end-to-end design for Corporate Card program from concept to live beta (6-month cycle), enabling finance teams to transition from reactive to proactive real-time spend control
  • Designed seamless integration with 3rd-party financial services while managing complex data flows and regulatory requirements
  • Applied cognitive load reduction—creating effortless workflows, consistent UI, and recognition-based interactions that minimise mental effort
  • Gathering beta performance data via Pendo to inform rapid iterations based on user behaviour and task completion
  • User Research & Validation
  • Conducted 50+ research sessions (1:1 interviews, A/B tests, questionnaires, surveys) to inform product direction and validate design decisions
  • Run feature-based usability testing plus quarterly client sessions, achieving user satisfaction increase over 6 months
  • Synthesised insights from customer success, sales, support tickets, and direct research—balancing feedback sources with data quality
  • Design Systems & Engineering Collaboration
  • Built design system in Figma and initiated React component library using Storybook.js with visual regression, unit testing, and integration testing
  • Applied Atomic Design methodology ensuring consistency and accelerating development velocity
  • Bridged design-to-code workflow, maintaining design integrity throughout implementation
Agile MethodologiesTask AnalysisConstructive FeedbackUser ScenariosProblem SolvingUsability Testing+19

Open source design system for sri lanka government by desyslag foundation

Principal User Experience Architect - Open Source Committer

Jan 2021Jun 2023 · 2 yrs 5 mos · Colombo, Western Province, Sri Lanka · Remote

  • Initiative Founding & Impact
  • Co-founded Sri Lanka's first national open-source design system for government digital services, partnering with ICTA to deliver potential cost savings in the millions by eliminating vendor dependencies
  • Scaled from 4 founding members to 100+ volunteers (frontend, UX/UI, QA, BA, CMS experts, software architects) through strategic networking and community activation
  • Secured private sector sponsorship for kick-off event through personal contacts, launching with zero government funding
  • Technical Leadership
  • Architected complete design system with 50+ accessible components built on Bootstrap, delivering production-ready WordPress library with Joomla and Drupal expansion in progress
  • Established technical governance using GitHub and Kanban boards, enabling coordinated development across 100+ distributed contributors
  • Defined design tokens, documentation standards, and contribution guidelines for consistent quality
  • Community & Program Management
  • Organised founding meetup with 30+ attendees, transitioning to virtual collaboration via Google Meet for sustained engagement
  • Recruited top-tier technical talent through personal network without recruitment budget
  • Served as product owner managing roadmap, sprint planning, and delivery—committing weekends and evenings beyond seasonal role
  • Stakeholder Relations
  • Served as bridge between ICTA and technical community, translating policy requirements into technical specifications
  • Represented initiative as public speaker at community events, building credibility and volunteer engagement
  • Ux & Design Systems
  • Conducted research across government agencies, developing personas and user flows for diverse Sri Lankan populations
  • Led cross-functional design sessions ensuring accessibility and cultural relevance
  • Created comprehensive documentation guiding distributed volunteer contributions
  • Project paused due to organisational restructuring—delivered production-ready library with documented roadmap
Agile MethodologiesUser Experience DesignConstructive FeedbackProblem SolvingFigma (Software)Wireframing+14

Mitra innovation

2 roles

Senior Lead UI UX - Digital Product Designer

Oct 2020Sep 2023 · 2 yrs 11 mos

  • Client Delivery & Retention
  • Led UX strategy and delivery for 3 major clients across finTech, healthcare, and propTech sectors, managing 6-8 month phased engagements with 100% client retention - all Phase 1 clients continued to
  • Phase 2 based on delivery quality and stakeholder trust
  • Earned public testimonials that directly generated 3+ referral clients, demonstrating measurable business development impact beyond design execution
  • Managed team of 3+ UX designers while collaborating with client in-house teams, ensuring seamless knowledge transfer and long-term product sustainability
  • Strategic Consulting & Pre-Sales
  • Contributed to 5+ pre-sale opportunities through workshop facilitation, rapid prototyping, and scoping/estimation - achieving 80% win rate and securing new business for the agency
  • Facilitated stakeholder alignment workshops with C-level executives, translating ambiguous briefs into actionable UX strategies within 2-week sprint cycles
  • Built consultative client relationships that positioned agency as strategic partner rather than vendor executor
  • Design Systems & Scalability
  • Built design libraries from scratch for clients lacking design infrastructure, creating 50+ reusable components in Figma that enabled post-engagement velocity and consistency
  • Established design governance and handoff documentation, reducing client dependency and empowering internal teams
  • Research & Rapid Validation
  • Executed high-velocity user research (interviews, usability testing, journey mapping) within compressed timelines, delivering actionable insights that informed product roadmaps across 3 industries
  • Validated concepts through iterative prototyping, de-risking investment and reducing development waste
  • Leadership & Standards
  • Defined UX/UI standards and best practices across, improving delivery consistency
  • Presented design rationale to executive stakeholders, securing buy-in for strategic recommendations
Agile MethodologiesUser Experience DesignConstructive FeedbackProblem SolvingFigma (Software)Wireframing+17

Lead UI UX - Digital Product Design

Oct 2017Nov 2023 · 6 yrs 1 mo

  • Product Strategy & Requirements
  • Partnered with product managers to translate business objectives into user-centered design solutions, defining product requirements that balanced user needs with technical feasibility across 10+ digital products
  • Bridged communication between technical and non-technical stakeholders, creating documentation that aligned cross-functional teams on shared product vision and delivery milestones
  • Design Leadership & Execution
  • Led end-to-end design for complex digital products from concept to launch, creating wireframes, interaction models, and high-fidelity prototypes that improved usability and reduced user friction
  • Established repeatable design processes that accelerated project timelines while maintaining quality standards across concurrent initiatives
  • Designed intuitive user experiences for diverse user groups, simplifying complex workflows into accessible interfaces
  • Team Development & Mentorship
  • Mentored 3+ junior designers, providing hands-on coaching through design critiques, portfolio development, and skill-building sessions that accelerated their progression to mid-level roles
  • Created mentorship framework that fostered designer growth and improved team capability, resulting in stronger design output and reduced dependency on external resources
  • Collaboration & Delivery
  • Worked closely with engineering teams to ensure design feasibility and smooth handoff, maintaining design integrity through implementation
  • Delivered consistent, on-time project completion across multiple concurrent workstreams while adapting to evolving product priorities
Agile MethodologiesUser Experience DesignConstructive FeedbackProblem SolvingFigma (Software)Wireframing+16

Destinationcore

Senior UX and Frontend Developer - SaaS

Sep 2019Mar 2021 · 1 yr 6 mos · Ipswich, England, United Kingdom · On-site

  • Product Specialisation
  • Designed and developed SaaS platform for BIDs (Business Improvement Districts), DMOs (Destination Marketing Organisations), shopping centers, and leisure/retail destinations—serving unique multi-stakeholder user needs
  • Built functional prototypes that bridged design and development, enabling rapid validation and stakeholder buy-in before full engineering investment
  • Full-Stack UX Development
  • Executed end-to-end workflow from UX research and wireframing through production-ready frontend code (HTML, SCSS, JavaScript, jQuery, Bootstrap)
  • Developed reusable component libraries within CraftCMS using Twig templating, ensuring design consistency and development efficiency across client implementations
  • Translated design specifications into pixel-perfect, responsive interfaces that maintained design integrity across devices and browsers
  • Rapid Prototyping & Validation
  • Created high-fidelity interactive prototypes using InVision and custom code, enabling user testing and iteration before committing to full development cycles
  • Reduced design-to-development friction by building prototypes that served as both validation tools and implementation references for engineering teams
  • Technical Collaboration
  • Collaborated with backend developers to integrate frontend components with CraftCMS architecture, ensuring seamless data flow and optimal performance
  • Established frontend standards and documentation that enabled scalability across multiple destination clients with varying brand requirements
  • Unique hybrid role combining UX design expertise with hands-on frontend development—eliminating traditional designer-developer handoff inefficiencies
Agile MethodologiesUser Experience DesignConstructive FeedbackProblem SolvingFigma (Software)Wireframing+11

Decipher innovation (part of the jacob bailey group)

Senior UX Frontend Developer - SaaS

Feb 2019Mar 2021 · 2 yrs 1 mo · Greater Ipswich Area · On-site

  • Strategic Product Development
  • Contributed to company-wide strategic planning sessions, shaping product roadmap and software project direction for place marketing platform serving destinations, DMOs, and stakeholders
  • Delivered "ruthless simplicity" in complex digital ecosystems—translating multi-stakeholder requirements into intuitive user experiences that balanced visitor needs with organisational goals
  • Agile Collaboration & Cross-Functional Leadership
  • Collaborated within agile project teams across product, engineering, and business functions, ensuring alignment between user research insights and technical implementation
  • Facilitated workshops with key stakeholders to gather requirements, drive consensus, and define product direction—documenting outcomes with clarity and visual appeal
  • User Research & Insights
  • Planned and executed user research initiatives, analysing and synthesising findings into actionable recommendations for product teams
  • Prepared and delivered research presentations tailored to diverse audiences—from technical teams to executive stakeholders—making complex insights accessible and actionable
  • Created compelling research artifacts (plans, findings, leave-behinds) that influenced strategic decisions and product priorities
  • Stakeholder Communication
  • Translated technical complexity into clear narratives for non-technical stakeholders, building trust and alignment across organisational levels
  • Documented and communicated research outcomes, design rationale, and technical decisions in visually engaging formats
  • Hybrid role combining strategic research, stakeholder facilitation, UX design, and hands-on frontend development for place marketing SaaS platform
Agile MethodologiesUser Experience DesignConstructive FeedbackProblem SolvingFigma (Software)Wireframing+11

Zaizi

Lead UI UX Designer

Sep 2014Sep 2017 · 3 yrs · Colombo · On-site

  • Government Sector Expertise
  • Led UX design for UK government departments including Department for Education, Department of Justice, and Department for Digital, Culture, Media & Sport—delivering citizen-focused digital services using GDS (Government Digital Service) standards
  • Collaborated with multidisciplinary teams and client in-house designers to define end-to-end user experiences for complex government services serving millions of UK citizens
  • Managed stakeholder relationships across government agencies, translating policy requirements into user-centered solutions
  • User Research & Insights
  • Planned and executed user research throughout the UK using contextual inquiry, interviews, and usability testing to inform design for critical public services
  • Analysed quantitative and qualitative data to create personas, user journeys, value propositions, and information architectures balancing citizen needs with government objectives
  • Presented research findings and recommendations to product owners and decision-makers, securing buy-in for user-centered approaches
  • Design Systems & Prototyping
  • Built Sketch design systems and component libraries ensuring consistency across government digital services and enabling scalable workflows
  • Created prototypes from low-fidelity sketches to fully interactive high-fidelity prototypes using InVision for stakeholder review and user validation
  • Conducted usability lab testing, iterating designs based on feedback to optimise task completion and accessibility
  • Agile Delivery & Technical Skills
  • Worked within agile teams to improve functionality while bridging user needs and business goals through iterative design cycles
  • Developed frontend code (HTML, SCSS, JavaScript, jQuery, Angular) to build functional prototypes and collaborate with engineering teams
  • Led UX for UK government digital services, applying GDS standards to deliver accessible, citizen-focused experiences
Agile MethodologiesUser Experience DesignConstructive FeedbackProblem SolvingFigma (Software)Wireframing+11

Virtusa

3 roles

UI Consultant - Specialist User Interface

Promoted

Jan 2013Sep 2014 · 1 yr 8 mos

  • Maintain W3C web standard, accessibility and usability. Usability testing for Responsive Web Design and Interactive Prototyping.
  • Take ownership of component design, development and maintenance.
  • Responsible for code reviews and technical quality standards within the project team
  • Carry out meticulous automated unit tests to ensure a high-quality deliverable into QA
  • Assist in defining structured practices, especially in source code management, build and release management.
  • Estimating the scale and complexity of user interface development tasks and providing accurate estimates for the completion of tasks.
  • Ensure SEO, Performance has met the rules.
  • Participate in Usability reviews and lead improvements in the front end design.
Agile MethodologiesConstructive FeedbackUser FlowsStakeholder ManagementWorkshopsDesign Patterns+1

Senior Engineer - Specialist User Interface

Apr 2010Jan 2013 · 2 yrs 9 mos

  • Develop web interfaces and components by utilizing advanced skills and experience in web UI and application development, markup languages xHTML, CSS and client-side JavaScript and jQuery languages.
  • Participate in all phases of development from definition and design through implementation, debugging, testing and deployment to ensure all work is to the highest standards.
  • Collaborate with designers, developer peers, business analysts, software engineers and software architects to appropriately address application architecture and divisions of responsibility between client-side and server-side technologies.
  • Take ownership of all assigned tasks to meet all project needs, including working with team members to deliver projects on time and on budget.
  • Act as a primary stakeholder in any phase of the development project.
Agile MethodologiesCommunication

Engineer - Specialist User Interface

Feb 2009Apr 2010 · 1 yr 2 mos

  • Create & Maintain UI Framework which easier to used by developers.
  • Front-end development by using jquery and jquery template.
  • Design, develop and customize UI Plug-ins which compatible for all browsers.
  • Analysis requirement, design and develop rich user interfaces and provide estimation for UI tasks and developments.
  • Follow and review the W3C standards for all audience.
  • Social media integration and SEO.
Agile Methodologies

British telecommunications

UI UX Consultant, UX, RWD, SEO, Accessibility and Usability

Apr 2012Mar 2013 · 11 mos · London Area, United Kingdom

  • Client facing and requirement gathering,
  • Hands on experiences in in HTML, CSS and CSS3 and JavaScript
  • Expert in SEO enable, accessible, validated, mobile optimized, semantic, pixel-perfect cross-browser compatible cording (W3C validation, SEO, A and AA compliance accessibility with screen readers and keyboards, reusable CSS and grouping, media queries, JavaScript and jQuery debugging, best practise methodologies for both usability and performance)
  • Good knowledge in mobile related front-end development (touch events) and Modenizr
  • Adequate skills in responsive design and the framework
  • Good knowledge in customizing jQuery plugins and optimizing
  • Take ownership of all assigned tasks to meet all project needs, including working with team members to deliver projects on time.
Agile MethodologiesUser FlowsStakeholder ManagementUser ExperienceCommunicationUX Research

Oracle

UI Specialist of Oracle Billing

Oct 2008Nov 2008 · 1 mo · Sri Lanka

  • Business Problem: As a vendor to Oracle Corporation, Aeturnum is instrumental in
  • developing its current and next-generation Self-Service applications and products.
  • In addition, Aeturnum offers Oracle-based Business Intelligence and Data
  • Warehousing services and solutions
  • Environment: xHMTL, CSS, AJAX, JavaScript, Photoshop, Flash, PHP, MySQL,
  • Apache
  • Project Role: Engineer UI
  • 5 of 9
  • · User Interface
  • · Defect Fixing
  • · User Customization
  • · Search engine optimization
Agile Methodologies

Aeturnum

Engineer Specialist User Interface

Apr 2008Dec 2008 · 8 mos · Sri Lanka

  • Corporate Communication - Creative Newsletters, News updates, all event and functions of the Aeturnum,
  • Engineer Specialist UI - Maintaining corporate web portal, UI Engineering works of Applications.

Wwwdesign.net

Team Leader

Mar 2005Apr 2008 · 3 yrs 1 mo · Kelaniya

  • Created team to vision of the project objectives, Motivate and inspire team members, Coach and help develop team members, Facilitate problem solving and collaboration, Encourage creativity, risk-taking, and constant improvement, Provide status reporting of team activities against the program plan or schedule, Provide guidance to the team based on management direction, Estimation and Project ownership.
Agile Methodologies

Idm computer studies private limited

Multimedia Lecturere

Jan 2005Jan 2010 · 5 yrs · Kiribathgoda, Sri Lanka

  • Roles & Responsibilities:
  • 1. Setting and marking of tests and examination papers;
  • 2. Course research and development;
  • 3. Preparation, teaching, examining, administrative and other duties as required by the Head of Department;
  • 4. Produce, file and distribute course notes, worksheets and summaries according to policies and procedures;
  • 5. Dealing with student needs (Academic)
  • 6. Workshops and project

Singapore informatics

2 roles

Senior Multimedia Lecturere

Promoted

Jan 2004Mar 2005 · 1 yr 2 mos

  • Roles & Responsibilities:
  • 1. Setting and marking of tests and examination papers;
  • 2. Course research and development;
  • 3. Preparation, teaching, examining, administrative and other duties as required by the Head of Department;
  • 4. Produce, file and distribute course notes, worksheets and summaries according to policies and procedures;
  • 5. Dealing with student needs (Academic)
  • 6. Workshops and project

Multimedia Lecturer

Oct 2002Jun 2004 · 1 yr 8 mos

  • Roles & Responsibilities:
  • 1. Setting and marking of tests and examination papers;
  • 2. Course research and development;
  • 3. Preparation, teaching, examining, administrative and other duties as required by the Head of Department;
  • 4. Produce, file and distribute course notes, worksheets and summaries according to policies and procedures;
  • 5. Dealing with student needs (Academic)
  • 6. Workshops and project

Education

Human Factors International

HFI Usability Analyst - Usability Analyst

Jan 2017Jan 2017

AMDT School of Creativity

Certification — Adobe Flex and Action Acript 3.0

Jan 2009Jan 2009

Arena Animation

Multimedia - affiliated of Aptech campus Bangalore India

Jan 2000Jan 2003

St. Aloysius'​ College

Secondary Education — Mathematical Stream

Jan 1996Jan 2000

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