Alex Rempel

Core skills

• Angular
• rxjs
• TypeScript
• HTML5
• CSS3

Focus areas

• Architecture for large Angular codebases: monorepos, shared/second-entry libraries, micro-frontends
• Modernization of legacy Angular: major-version upgrades, routing and state refactoring, code generation from OpenAPI
• Reactive UI engineering: RxJS and Signals, large data tables, dashboards, Excel-like editors
• Quality: Jest/ng-mocks unit tests, Playwright integration and E2E tests
• Enablement: workshops and code reviews for junior and mid-level developers

Key achievements

• Corporation-wide Angular library

  Technical lead for RWE “Unity”, the modular Angular utility library adopted by teams across RWE divisions (team ~10).

• Dynamic form engine

  Frontend lead for RWE “Contract Wizard”: more than 220 context-sensitive forms plus the Excel-driven component generator behind them.

• Major-version upgrade programme

  Led KION's e-commerce clients through four Angular major versions (13–16) and added Angular SSR for SEO (10-person team).

• Fast onboarding at scale

  Productive on the second day inside a ~60-developer monorepo at SINC.

Technologies and industries

Project experience

Selected projects, most recent first.

1. 02/2026 – ongoing

   SINC · Frontend Expert

   UX solution for the German Environment Agency's single-use plastics fund (live product): backoffice and multi-domain clients for producers, beneficiaries and fund finance.

   • Angular 21 SPA clients with shared libraries in a Docker Compose monorepo spanning three business domains; C# backend microservices and backend-to-backend work
   • Integration and E2E tests with Playwright, unit tests with Jest, ng-mocks and ts-mockery
   • Productive on the second day inside a ~60-developer monorepo

   • Angular 21
   • TypeScript
   • rxjs
   • HTML5/CSS3
   • C#
   • Playwright
   • Jest
   • Docker Compose

2. 05/2025 – 12/2025

   Vonovia · Frontend Expert

   Elevator asset management UX for asset managers and maintenance staff: multi-brand Angular 15 SPA with high data density.

   • Node.js backend-for-frontend (API and backend-to-backend); backend-driven layout forms, dynamic editable data tables, panorama viewer, assets on Google Maps
   • Refactored routing and state management, added Jest unit tests and OpenAPI-contract code generation; prepared the upgrade of the legacy application to modern Angular
   • Frontend team of 3; files routinely over 2k lines of code

   • Angular 15
   • TypeScript
   • rxjs
   • HTML5/CSS3
   • Node.js (Backend-for-Frontend)
   • OpenAPI
   • Jest
   • Google Maps

3. 05/2025 – 08/2025

   Proofsafe · Frontend Expert

   Arboriculture asset management UX in a startup environment: multi-brand SPA on Angular 20, prepared for the move to Angular 22 and up.

   • “Forms for forms”: complex configuration UIs driving dynamic end-customer forms
   • Added Jest unit tests, refactored routing and state management; performance work on Google Maps visualizations
   • Frontend team of 2

   • Angular 20
   • TypeScript
   • rxjs
   • HTML5/CSS3
   • Jest
   • Google Maps

4. 07/2024 – 12/2024

   RWE Trading · Frontend Architect / Lead

   Trading-floor UX for energy traders: Excel-based workflows translated into a modern UI within RWE's styling guidelines.

   • Grid of trading “curves” (energy vectors) with real-time updates and near-Excel configuration, plus Excel export and updates
   • Multi-timezone daily summary (US, EU, Japan) and curve catalog with dependency charts and live error states
   • C# backend-for-frontend with REST, Swagger and MSAL authentication; team of ~6

   • Angular
   • TypeScript
   • rxjs
   • HTML5/CSS3
   • ECharts
   • C#
   • MSAL
   • PostgreSQL

5. 03/2023 – 12/2023

   KION Group AG · Architect & Developer

   E-commerce SPA/PWA clients in a large NX monorepo of clients and libraries: multi-brand, multi-locale webshop and portals for forklift sale and rental.

   • Led the clients through four Angular major versions (13–16); split the monorepo into second-entry-level sub-libraries to reduce client bundles; added Angular SSR for SEO
   • Mentored the team on RxJS, dependency injection and best practices; Jest unit tests across clients and libraries
   • Team of ~10

   • Angular 13–16
   • NX Monorepo
   • SSR
   • PWA
   • TypeScript
   • rxjs
   • Jest

6. 07/2021 – 12/2024

   RWE Supply · Frontend Architect & Developer

   Intranet application family for energy asset management, built on the corporation-wide “Unity” Angular library (technical lead for that library).

   • “Unity”: modular utility library with second entry-points, a showcase application and shared components for teams across RWE divisions
   • Applications: DCentral (regulation of energy-generating assets), ForecastVIEW (asset-specific consumption forecasting), PortfolioVIEW, DataVIEW, BIC, ViewAdmin
   • “Contract Wizard”: 220+ context-sensitive forms adapting step by step to inputs; an Excel-driven generator produces Angular components with validations and translations
   • Angular Material wrappers, translation and locale-loading modules, error handling, schematics and testing utilities in the library; ECharts dashboards; team of ~10

   • Angular
   • Angular Library
   • TypeScript
   • rxjs
   • Angular Material
   • ECharts
   • HTML5/CSS3
   • C#
   • PostgreSQL

7. 01/2021 – 06/2021

   KION Group AG · Architect & Developer

   ALE project: SPA clients with PrimeNG on Angular 11 for internal asset and contract management: complex forms for commercial contract creation and for renting assets on external marketplaces.

   • PDF contract generation directly in the client; micro-frontends including transclusion (frontend-in-frontend)
   • Introduced NPM libraries for shared code, theme CSS, localization (WebTranslateit with runtime XLF-to-CSV resolution) and Angular widgets
   • Real-time user monitoring in Node.js server and Angular clients; DevOps via Jenkins, YAML, Docker, Kubernetes, Azure; 10-person team

   • Angular 11
   • PrimeNG
   • Micro-Frontends
   • TypeScript
   • Node.js
   • Docker
   • Kubernetes
   • Azure
   • Jenkins

8. 09/2020 – 12/2020

   dd-chords (own product) · Architect / Developer / Designer

   Chord overview PWA, live at dd-chords.web.app as a production-level prototype to demonstrate PWA and IndexedDB skills: runs as SPA in the browser and installable as app on Android.

   • Offline availability by syncing remote songs to IndexedDB; own format for storing songs with chords; sharing of songs from within the app
   • Firebase hosting, Travis CI/CD, Jest unit tests

   • Angular
   • PWA
   • IndexedDB
   • Firebase
   • Jest
   • Travis CI

   Open live demo →

9. 04/2019 – 08/2020

   KION Group AG · Architect & Developer

   PURE project: internal clients and portals for managing forklift resources and contracts.

   • Angular 2–9 clients with server-side rendering and micro-frontends; oauth2 handled for multiple frontends
   • Auth Server and Media Server NPM packages: single auth point for multiple micro-frontends, asset and image delivery
   • Feature toggles separating technical from business releases; Java Spring services with OpenAPI contracts; Jenkins and Docker infrastructure-as-code; team of ~10

   • Angular 2–9
   • SSR
   • Micro-Frontends
   • OAuth2
   • TypeScript
   • Java Spring
   • OpenAPI
   • Jenkins
   • Docker

10. 05/2017 – 03/2019

    DB Energie · Architect & Developer

    Internal web UI client for energy grid data administration, built from zero.

    • Concept, software architecture and implementation; solo architect and developer for over 20 months
    • Angular 2–7 client with a reactive approach and Material design; D3.js charts; SOAP and REST plus TIBCO OpenSpace service interfaces
    • Jenkins CI, unit testing and deployment

    • Angular 2–7
    • TypeScript
    • rxjs
    • Angular Material
    • D3.js
    • REST
    • SOAP
    • Jenkins

11. 10/2016 – 04/2017

    Mediatis · Developer

    Versioned document repository as an offline-available web app.

    • AngularJS and TypeScript frontend features; C# service performance and refactoring with SQL backend

    • AngularJS
    • TypeScript
    • HTML5/CSS3
    • C#
    • SQL

12. 02/2016 – 09/2016

    livedooh · Developer

    Media player platform: Chrome App media player plus AngularJS SPA with C# and MongoDB backend.

    • AngularJS
    • JavaScript
    • Chrome App
    • C#
    • MongoDB

13. 2015 – 2016

    Independent consulting

    Consulting and development for clients, including Brandmasters / KomAn (qooxdoo, Metaforce).

    • qooxdoo WYSIWYG UI editor: JSON UI layouts, theming and localization, open source and in production
    • C# configurator framework: configuration-driven module model (inheritance, referencing, nesting) inflated via reflection, fully unit and integration tested

    • qooxdoo
    • JavaScript
    • C#

14. 03/2015 – 12/2015

    Envision Entertainment

    “CnC Tiberium Alliances”: qooxdoo web UI features and theming, feature-complete layout editor, SVG world-map renderer; C# web services, backend simulation and tooling.

    • qooxdoo
    • JavaScript
    • SVG
    • C#

15. 06/2013 – 12/2014

    Jeppesen Norway AS, a Boeing Company

    Data synchronisation between heterogeneous database models and geographically distributed systems: Java/Spring/Hibernate/JPA server modules, REST services, PostgreSQL, Amazon AWS (SNS/SQS/S3). Details under NDA.

    • Java
    • Spring
    • Hibernate/JPA
    • REST
    • PostgreSQL
    • AWS SNS/SQS/S3

16. 05/2011 – 03/2013

    EA Phenomic

    “CnC Tiberium Alliances” browser and cross-platform mobile clients, “Lord of Ultima” browser client (team ~20): qooxdoo/HTML5 UI features including right-to-left UI mirroring; side projects: WYSIWYG layout editor, interactive in-app tutorial system, theme-compatible CSS animations.

    • qooxdoo
    • HTML5
    • JavaScript
    • CSS animations

17. 2010 – 2011

    devdroy (own products)

    Own Android live wallpapers and apps (Java, OpenGL ES 2.0); three published on Google Play; CityApp prototype under NDA.

    • Android
    • Java
    • OpenGL ES 2.0

18. 04/2009 – 08/2010

    Advancis Software & Services

    “WinGuard” installation-security overview system: parallelisation engine and interfaces to video, access-control, telephony, nurse-call and leak-warning systems, all solo as developer and lead, all in production.

    • C++
    • MFC

19. 09/2007 – 03/2009

    rocketsciencegames

    “Deutschland singt online” PC karaoke game: DirectShow video/webcam pipeline, shader-based video-editing studio, encrypted archiving, menu GUI system (XML/Lua); “Tabaluga” Nintendo DS game: game logic.

    • C++
    • DirectShow
    • Shader
    • Lua

Education, teaching and languages

Education

Master of Computer Science

Teaching

Lecturer at Hochschule Darmstadt: basics of computer science, Android application development, UI and layout mechanisms

Training

TypeScript, Angular, RxJS, functional programming and unit-testing concepts

Languages

German, English, Russian (fluent)