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I'm Adam Lenczewski, a front-end technology leader with 15+ years of hands-on experience shaping front-end architecture and development processes. I have collaborated with teams across banking, government, real estate, digital, media, recruitment, and e-commerce, working with top digital agencies and high-profile clients. I thrive on building scalable UI systems, driving delivery, and mentoring engineers in international environments. I’m passionate about progressive front-end engineering, micro frontends, and accessible, high-performance web applications. I enjoy turning complex requirements into pragmatic, maintainable solutions and helping organisations evolve their technical capabilities while delivering delightful user experiences.…I'm Adam Lenczewski, a front-end technology leader with 15+ years of hands-on experience shaping front-end architecture and development processes. I have collaborated with teams across banking, government, real estate, digital, media, recruitment, and e-commerce, working with top digital agencies and high-profile clients. I thrive on building scalable UI systems, driving delivery, and mentoring engineers in international environments. I’m passionate about progressive front-end engineering, micro frontends, and accessible, high-performance web applications. I enjoy turning complex requirements into pragmatic, maintainable solutions and helping organisations evolve their technical capabilities while delivering delightful user experiences.

Adam Lenczewski

Front-End Developer, Web Developer, Programmer

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I'm Adam Lenczewski, a front-end technology leader with 15+ years of hands-on experience shaping front-end architecture and development processes. I have collaborated with teams across banking, government, real estate, digital, media, recruitment, and e-commerce, working with top digital agencies and high-profile clients. I thrive on building scalable UI systems, driving delivery, and mentoring engineers in international environments. I’m passionate about progressive front-end engineering, micro frontends, and accessible, high-performance web applications. I enjoy turning complex requirements into pragmatic, maintainable solutions and helping organisations evolve their technical capabilities while delivering delightful user experiences.…I'm Adam Lenczewski, a front-end technology leader with 15+ years of hands-on experience shaping front-end architecture and development processes. I have collaborated with teams across banking, government, real estate, digital, media, recruitment, and e-commerce, working with top digital agencies and high-profile clients. I thrive on building scalable UI systems, driving delivery, and mentoring engineers in international environments. I’m passionate about progressive front-end engineering, micro frontends, and accessible, high-performance web applications. I enjoy turning complex requirements into pragmatic, maintainable solutions and helping organisations evolve their technical capabilities while delivering delightful user experiences.

Available to hire

I’m Adam Lenczewski, a front-end technology leader with 15+ years of hands-on experience shaping front-end architecture and development processes. I have collaborated with teams across banking, government, real estate, digital, media, recruitment, and e-commerce, working with top digital agencies and high-profile clients. I thrive on building scalable UI systems, driving delivery, and mentoring engineers in international environments.

I’m passionate about progressive front-end engineering, micro frontends, and accessible, high-performance web applications. I enjoy turning complex requirements into pragmatic, maintainable solutions and helping organisations evolve their technical capabilities while delivering delightful user experiences.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Software Engineer at KWAN

June 1, 2025 - December 1, 2025

Implemented new features in a data streaming platform using Kafka; frontend development with Angular, RxJS and AG Grid; applied BEM methodology and wrote unit tests with Jasmine.

Front-End Developer at Tradrr

March 1, 2024 - December 1, 2024

Maintained a codebase for an online futures trading platform using Angular, RxJS, TypeScript and Canvas API.

Front-end Developer at Pragmative

September 1, 2023 - December 1, 2023

Front-end development of online casinos using Angular, RxJS, GraphQL, Karma, Jasmine and Node.js.

Front-End Developer at Kreuzwerker

May 1, 2021 - December 1, 2022

As a client-facing consultant I managed expectations, translated business requirements into User Stories, and maintained multiple projects using Angular, React, Vue.js, Next.js, Node.js, Storybook and Figma.

Angular Developer at Bank Pekao

November 1, 2020 - June 1, 2021

Provided access to an online banking platform for employees; maintained an existing Angular codebase and covered functionality with Jasmine tests; participated in Scrum ceremonies.

JavaScript Developer at Nexio Management

July 1, 2020 - November 1, 2020

Supported a software house in delivering an online platform for publishing advertisements and electronic information exchange; created new functionalities in Angular; participated in Scrum ceremonies.

Front-End Developer at COI

June 1, 2017 - June 1, 2020

External consultant and unofficial Software Development Manager; educated management on tech impact, designed a CSS pattern library, planned CI/CD pipelines, and steered a transition to micro frontend architecture; recruited and mentored team members.

Front-End Developer at Zoopla

January 1, 2017 - February 1, 2017

Built UI widgets in vanilla JavaScript with modular CSS using BEM; contributed to a new service; participated in Scrum ceremonies.

Front-End Consultant at Excelian

October 1, 2016 - November 1, 2016

Delivered a KYC front-end for an online trading platform; AngularJS-based UI; coordinated multi-site Scrum teams across UK and Australia.

Front-End Developer at Thomson Reuters

January 1, 2016 - July 1, 2016

Built front-end for Convene Manager and Alpha Console; SPA communicating with micro-services; used Yeoman, SASS, BEM, TypeScript and Angular 2; distributed teams.

Front-End Developer at Salmon

August 1, 2015 - December 1, 2015

Contributed to Hybris e-commerce projects; built online shop for a fashion retailer with HTML5, JSP/JSTL, AngularJS and Hybris; worked on another Hybris-based site.

Front-End Developer at eFinancialCareers

April 1, 2014 - June 1, 2015

Senior member of Solutions & Innovations; set coding standards; mentored junior developers; led offshore Scrum delivery; worked on multi-language web app with Backbone.js, Jasmine, SASS, AngularJS; contributed to SEO and emails.

Front-End Developer at Merixstudio

December 1, 2012 - April 1, 2014

Delivered front-end for many projects; promoted progressive enhancement, modular CSS and reusable components; used jQuery, Raphaël, Google Maps API, and Magento integrations; worked with Mercurial.

Front-End Developer at XHTMLized

August 1, 2012 - December 1, 2012

Delivered projects under tight deadlines; produced accessible XHTML/HTML5; built modular CSS; documented JavaScript with JSDoc; collaborated via Basecamp.

Webmaster at Freelancer

April 1, 2010 - December 1, 2012

Proposed technical solutions; produced semantic, cross-browser markup; built front-end templates for WordPress and other CMS; performed SEO/analytics; designed wireframes and provided client support.