Piet Althoff-Senior Product Engineer / Automation Developer
Check rate
Experience
Founder
RubberMetrics.com
- Self-hosted table tennis equipment platform.
- Development of a custom “Racket Builder” that uses a co-evolutionary genetic algorithm to identify, evaluate, and recommend the optimal combinations of racket blades and rubbers based on physics heuristics and player data within a search space of over 4 billion combinations.
- Development of a custom fully automated web crawler to capture equipment specifications, integrating an automated pipeline for image normalization as well as data harmonization via DeepSeek.
- Cloudflare Edge Workers written in Rust to perform low-latency data searches and offload computationally intensive simulations from the main server.
- High performance and accessibility standards across a large Nuxt 4 codebase achieving 95–100/100/100 Lighthouse scores.
Senior Frontend Developer
DEKRA SE
- Complex migration of the international DEKRA website (active across 20+ countries) from Nuxt 2 to Nuxt 3, ensuring zero outtime.
- Delivered pixel-perfect frontend components strictly aligned with Figma designs, utilizing Storybook for isolated UI development and consistency.
- Drove frontend performance improvements and modernized the architecture while working strictly within the unalterable boundaries of a legacy, multi-regional CMS.
Senior Frontend Developer
Value Finance GmbH
- Developed a customer-facing application for a team of realtors to manage insurance and financial contracts, providing real-time insights into various insurance products.
- Implemented a complex, reactive SVG visualization that displays key contract metrics for client presentations.
Lead Architect
start.me B.V.
- Served as lead architect for updating a large SaaS platform with several million users from Vue 2 (SPA) to Nuxt 3 (SSR).
- Coordinated the upgrade process to enhance web performance and maintainability.
- Mentored two nearshore developers on best practices in software development, code quality, and UX/UI considerations to ensure user-centric design and accessibility.
- Initiated and led the development of new interface concepts and widgets to improve user interaction and visual appeal while maintaining high performance and responsiveness across devices.
Senior Frontend Developer
Dumont Media GmbH
- Successfully relaunched all of Dumont’s major online newspapers (Kölner Stadt-Anzeiger, Express, Kölnische Rundschau) with Nuxt 3.
- Handled business logic, including teaser arrangement, revenue-related issues (ads, placements, logic), SEO topics, personalization features (including regionalized news and premium features), and search functionality with interpretation of misleading links.
Lead Architect
drumcenter.de
- Successfully relaunched a legacy Magento 1 online shop to Nuxt 2 with over 100 000 shop items.
- Used heavy RegEx to polish item names and correct legacy/transfer errors.
- Improved SEO and site speed significantly; now ranking for “Drum” related search terms above musicstore.de in Cologne.
Senior Frontend Developer
Generali Insurance Group
- Wrote an internal-use script in TypeScript and Node.js to clean up and summarize large amounts of customer data from various Excel files and transform them into a unified JSON dataset.
Frontend Developer
ENPOLITE - ISEA of RWTH Aachen University
- Developed a website presenting a Lithium Battery Aging research project using Nuxt 2, Vuetify 2, Nuxt 3, Vuetify 3, and Netlify.
- Made the non-responsive Vega Data Visualization library responsive.
- Implemented lazy loading of multiple large JSON datasets to save bandwidth and improve UX.
- Created hidden pages for researchers to discuss unreleased datasets.
Frontend Developer
Convidera GmbH
- Brought Nitrex Steel Furnaces UIs into the Web 3.0 industry project using Vue 3 and GraphQL.
- Worked with a 0.5 million LOC German legacy code base and collaborated with offshore designers and backend developers.
Frontend Developer
Dermanostic GmbH
- Optimized site speed, performed Webpack pruning, and implemented SEO improvements using Nuxt 2 and Google Analytics.
- Developed custom tree-shaking for Vue-Bootstrap and broke the page into lazy-loaded components, reducing onload time from 1220 ms to 380 ms.
- Achieved #1 ranking in Germany for search terms like “dermatologie app”, “hautarzt app”, and “hautarzt online”.
Lead Architect
Primed Marketing Agency (by Fedor Holz)
- Scraped and analyzed 2.5 million Instagram accounts daily using a custom-written Instagram API via Puppeteer.
- Served as the first developer of the company.
- Built a botnet used by the European Commission in Vienna.
Frontend Developer
Phobius VR-Phobia Treatment
- Developed several phobia treatment sites using Nuxt 2 and Google Analytics.
- Optimized UI/UX, conversion funnels, site speed, and SEO.
- Achieved position 1 on Google Austria above Wikipedia for several phobia-related sites.
- Delivered some of Google’s infoboxes from phobius.at instead of Wikipedia.
- Acquired 90% of customers via SEO as the first developer of the company.
Founder
Diplomaps (Own Project)
- Scraped and analyzed tens of thousands of international diplomatic and economic news items daily using Node.js (worker threads) and later Go.
- Presented the project to the Policy Planning Staff of the German Federal Foreign Office in Berlin.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Healthcare, Government and Administration, Education, Energy, and Retail.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Marketing, Research and Development, and Business Intelligence.
Summary
I am a senior JavaScript developer with 11 years of experience building data-heavy web products, automation pipelines, crawlers, internal tools and AI-assisted workflows. My core stack is Vue/Nuxt, TypeScript and Node.js, backed by 7 years of Vue/Nuxt experience. I combine frontend architecture, backend automation, performance optimization and SEO to build practical, maintainable products from idea to production.
Skills
Vue 3, Nuxt 3/4, Typescript, Node.Js, Tailwind Css, Storybook, Playwright, Vitest, Supabase, Postgresql, Mongodb, Docker, Ai Flows, Llm Workflows, Code Agents, Web Crawling, Data Pipelines, Seo, Performance Optimization, Ssr, Frontend Architecture, Product Engineering, Automation
Languages
Education
University of Vienna
Biology - Genetics · Vienna, Austria
FH Jülich
Bio-Technology · Jülich, Germany
Einhard-Gymnasium
Aachen, Germany
Statistics
Experience
Expertise
Profile
Frequently asked questions
Have questions? Find more information here.
Piet is based in Cologne, Germany and can operate in on-site, hybrid, and remote work models.
Piet speaks the following languages: German (Native), English (Advanced).
Piet has at least 13 years of experience. During this time, Piet has worked in at least 4 different roles and for 13 different companies. The average length of individual experience is 1 year. Note that Piet may not have shared all experience and actually has more experience.
Based on recent experience, Piet would be well-suited for roles such as: Founder, Senior Frontend Developer, Lead Architect.
Piet's most recent position is Founder at RubberMetrics.com.
In recent years, Piet has worked for RubberMetrics.com, DEKRA SE, Value Finance GmbH, start.me B.V., and Dumont Media GmbH.
Piet is most experienced in industries like Information Technology, Healthcare, and Government and Administration. Piet also has some experience in Education, Energy, and Retail.
Piet is most experienced in business areas like Information Technology, Product Development, and Marketing. Piet also has some experience in Research and Development and Business Intelligence.
Piet has recently worked in industries like Information Technology, Healthcare, and Education.
Piet has recently worked in business areas like Information Technology, Product Development, and Marketing.
Piet attended University of Vienna for Biology - Genetics.
Piet is immediately available full-time for suitable projects.
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Calculated based on our freelancers’ daily rates as of 3 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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