Egor Kloos — Frontend Engineer

Egor Kloos is a fulltime Front-end developer (Design implementation) at Nederlandse Spoorwegen (Dutch Rail), passionate about working on large-scale web projects for companies like ING, Aon, ANWB, and SDU. He brings multiple disciplines together in modern, sophisticated environments by helping teams understand the landscape of Design Systems and their relationship to the front-end. His extensive background with front-end and design teams enables him to think and work in a multidisciplinary way. With his wide-ranging experience, he focuses on the needs of both the business and its users. As an Agile practitioner, he delivers solutions iteratively to help a team achieve its goals effectively. Besides being a web nerd, he is passionate about photography, food, drink, travel, and art. All the good things in life inspire him to make the most of his private and professional life. Acquiring UX and UI development knowledge has primarily occurred in the workplace. Adding a Post-Bachelor's in Digital Strategy underlines his ability to provide value through front-end development and UX. With this extensive practical experience, he writes and works on custom UX/UI solutions. He has been active in UX, Frontend, and agile coaching in this way since 1997, focusing mainly on sustainable, effective design systems and development processes. Has done work for: - ICTU - Mediq - ING - Aon - ANWB - KvK - SDU - Center Parcs - KPN - Royal Dutch Air Force Note: I'm not a Freelancer and do any freelance work.

Stackforce AI infers this person is a Frontend Developer specializing in Design Systems and Agile methodologies for the Transportation and SaaS industries.

Location: Rotterdam, South Holland, Netherlands

Experience: 29 yrs 5 mos

Skills

Front-end Development
Design Systems
Ui Engineering
Agile Project Management
Agile Development

Career Highlights

Expert in developing reusable Design Systems.
Strong background in Agile methodologies and leadership.
Proven track record in UX/UI design and implementation.

Work Experience

Nederlandse Spoorwegen

Senior Frontend Developer (6 mos)

Informaat

Principal Frontend developer (2 yrs 7 mos)

Practice Lead (2 yrs 6 mos)

Senior Frontend Developer (1 yr 7 mos)

Sogeti

Lead Solution Architect (Interaction) (3 yrs 11 mos)

ANWB

Lead Front-end (3 yrs 1 mo)

ITERA

Front-end consultant (5 mos)

Lunatech Research

Front-end Developer & Web Designer (2 yrs 11 mos)

42

UI Consultant (3 yrs 11 mos)

Tiscali

Lead Designer (6 mos)

ZaPPWeRK

Senoir Web Specialist (2 yrs 2 mos)

ARA Interactive

Senior Interaction Designer (1 yr 5 mos)

Dutchcelt Design

Designer Frontender Blogger (25 yrs 5 mos)

WDS, Dutch Dynamic Media Design

Senior Media Designer (0 mo)

OPHIS

Senior graphic producer and designer (4 yrs)

Education

Post Bachelor at The Hague Executive Campus

MBO at Grafisch Lyceum Rotterdam

at Lindsay Road National School

Egor Kloos

Frontend Engineer

Rotterdam, South Holland, Netherlands29 yrs 5 mos experience

Most Likely To SwitchHighly Stable

Key Highlights

Expert in developing reusable Design Systems.
Strong background in Agile methodologies and leadership.
Proven track record in UX/UI design and implementation.

Stackforce AI infers this person is a Frontend Developer specializing in Design Systems and Agile methodologies for the Transportation and SaaS industries.

Contact

Skills

Core Skills

Front-end DevelopmentDesign SystemsUi EngineeringAgile Project ManagementAgile Development

Other Skills

CSSHTMLJavaScriptReact.jsDesign tokensUX/UIResponsive Web DesignPrototypingDesignFront-endVue.jsStrategyWeb ComponentsMicrosoft AzureAgile Leadership

About

Experience

29 yrs 5 mos

Total Experience

4 yrs 9 mos

Average Tenure

25 yrs 5 mos

Current Experience

Nederlandse spoorwegen

Senior Frontend Developer

Dec 2025 – Present · 6 mos · Utrecht, Netherlands · Hybrid

Working on the Design System Tractie, an enterprise-wide design system consisting of a Design Kit, Web Component libraries, and a Design Token system.
Objective: Streamline the development of internal NS applications through reusable UX/UI patterns and architecture.
Key Focus:
Co-developing and maintaining a bespoke Design Token system.
Creating reusable Web Components for internal application teams.
Supporting teams in integrating Design System components within various front-end libraries.
Working with Designers and Developers to align features and implementations.
Defining and refining feature roadmaps in collaboration with the Product Owner.
Coordination of features with stakeholders and feature/product teams.

Front-End DevelopmentCSSHTMLJavaScriptReact.jsDesign tokens+3

Informaat

3 roles

Principal Frontend developer

Promoted

Apr 2023 – Nov 2025 · 2 yrs 7 mos · Hilversum, North Holland, Netherlands

As Principal Frontend Developer, I help develop and implement UX/UI strategies for Informaat and its customers. Responsible for overseeing the entire design implementation process, from selecting tooling, creating coded solutions and advising on the impact of solutions, like Design Systems, in any given IT environment.
Current Assignments**:
Design Systems Engineer / Architect at NS to help build and extend their Enterprise Design System (Tractie)

CSSStrategyAgile Project ManagementWeb ComponentsUI EngineeringAgile Development+11

Practice Lead

May 2022 – Nov 2024 · 2 yrs 6 mos · Hilversum, North Holland, Netherlands

CSSNode.jsPractice ManagementAgile Project ManagementWeb ComponentsUI Engineering+12

Senior Frontend Developer

Sep 2021 – Apr 2023 · 1 yr 7 mos · Hilversum, North Holland, Netherlands

As a UX Engineer*, I'm focused on creating usable and effective UX solutions for publishers, eCommerce, Enterprize and government.
Previous Assignments:
Design Engineer at Mediq creating web components for their Design System
Design Engineer/Developer at ICTU for their NL Design System
Design System Architect at Mediq to create a new cross-platform Design System.
Note that Engineer in this context refers to development and isn't an academically accredited title.

CSSHTMLAgile MethodologiesWeb ComponentsUI EngineeringAgile Development+11

Sogeti

Lead Solution Architect (Interaction)

Sep 2017 – Aug 2021 · 3 yrs 11 mos · Netherlands

Lead Solution Architect (Interaction).
Focused on bringing UX solutions to publishers, eCommerce and Enterprises.
Assignment at ING:
2020 - 2021
The Assignment at ING as Product Owner. Helping the One Experience teams create features for their Marketplace and evolve the ING Design System.
Assignment at Aon:
September 2017 – 2020
The assignment at Aon as a Lead Front-end & UX is broad and covers both an advisory and a hands-on role in developing and designing a Design System from the ground up. Increasing the effectiveness of its front-end ability with a more robust and consistent UI across teams and departments.

CSSStrategyAgile Project ManagementWeb ComponentsUI EngineeringAgile Development+7

Anwb

Lead Front-end

Jul 2014 – Aug 2017 · 3 yrs 1 mo · Den Haag

Department Front-end lead:
Consulting on the front-end architecture for ANWB's B2C website.
UI Design & Front-end development
Agile and Front-end (team) coaching
Initiating and managing new front-end development technologies
Consulting business on ongoing and upcoming development strategies.
Redesign specialist

CSSStrategyUI EngineeringAgile DevelopmentResponsive Web DesignAgile Leadership+6

Itera

Front-end consultant

Jan 2014 – Jun 2014 · 5 mos · The Hague Area, Netherlands

Consulting for ANWB on front-end development and Architecture and in addition to this providing ANWB with some Agile coaching and interim Scrum Master for the mobile web team.

CSSUI EngineeringAgile DevelopmentResponsive Web DesignAgile LeadershipPrototyping+5

Lunatech research

Front-end Developer & Web Designer

Jan 2011 – Dec 2013 · 2 yrs 11 mos · Rotterdam Area, Netherlands

Creating industry leading web applications and web sites has over the years been my main focus. My front-end knowledge and skills in Adaptive Design and User Interfaces are paramount in bringing it all together.

CSSUI EngineeringAgile DevelopmentResponsive Web DesignAgile LeadershipPrototyping+5

42

UI Consultant

Feb 2007 – Jan 2011 · 3 yrs 11 mos

UX consultancy is my current focus as a design lead with a high level of knowledge and skill in Web Standards, CSS and front-end engineering.

CSSUI EngineeringAgile DevelopmentResponsive Web DesignPrototypingDesign+3

Tiscali

Lead Designer

Jul 2006 – Jan 2007 · 6 mos

Lead Web designer for the Netherlands.
Designing for both the B2C and B2B portfolios.

CSSUI EngineeringResponsive Web DesignPrototypingDesignFront-end+2

Zappwerk

Senoir Web Specialist

Apr 2004 – Jun 2006 · 2 yrs 2 mos

Web standards specialist

CSSUI EngineeringResponsive Web DesignPrototypingDesignFront-end+2

Ara interactive

Senior Interaction Designer

Jan 2002 – Jun 2003 · 1 yr 5 mos

Designing campaign / promotional websites for clients like Polaroid, Dutch Royal Airforce, Mitsubishi.

CSSUI EngineeringResponsive Web DesignDesignFront-endFront-End Development

Dutchcelt design

Designer Frontender Blogger

Jan 2001 – Present · 25 yrs 5 mos · Rotterdam Area, Netherlands

Pro-bono Front-end and Web Design consultancy, only for non-profits and non commercial work.

CSSUI EngineeringDesign tokensResponsive Web DesignPrototypingDesign+3

Wds, dutch dynamic media design

Senior Media Designer

Jan 2001 – Jan 2001 · 0 mo

Designing websites and printed material for Elsevier, FBTO, Flexa, Cup-a-Soup and promotional web material (including a website) for racing driver Christian Albers to promote a move in to Formula 1.

CSSUI EngineeringDesignFront-endFront-End Development