Eike Klindworth, Developer in Hamburg, Germany
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Eike Klindworth

Verified Expert  in Engineering

Software Developer

Hamburg, Germany
Toptal Member Since
August 29, 2022

Eike is a developer residing near Hamburg, Germany. About ten years ago, he started his journey in web development, first with PHP, then later moved on to Java and TypeScript. He studied computer science in Oldenburg and began freelancing in 2020. Eike is mainly auditing and consulting developers, building APIs and front-end stacks. He has developed many projects within the field of Java, TypeScript, and Node.js, making it his current primary area of expertise.


JavaScript, TypeScript, Node.js, MongoDB, SQL, Web, React DnD, React Native...
GR8 UG Haftungsbeschränkt
JavaScript, Node.js, Angular, MongoDB, Express.js, B2B...
BitFlow GmbH
Architecture, Due Diligence, Code Auditing, Reports, Scalability




Preferred Environment

Slack, Windows, Linux, WebStorm, JavaScript, TypeScript, Docker, React

The most amazing...

...thing I've built is a gaming community with close to 150,000 registered users.

Work Experience

Full-stack Developer and Consultant

2020 - PRESENT
  • Created a gaming community with close to 150,000 registered users.
  • Audited a cryptocurrency startup's codebase and architecture.
  • Developed a European Union COVID-19 certificate validation API for a private investor.
  • Coached a company's quality assurance team on JavaScript.
  • Created a custom Cloudflare worker script to improve the UX on WordPress sites in terms of TTFB and FCP.
  • Created a custom HTTP proxy to protect sites against DoS requests that bypass Cloudflare.
  • Developed several web scrapers, crawlers, and spiders.
  • Created an application to record contract details for customers over VoIP.
Technologies: JavaScript, TypeScript, Node.js, MongoDB, SQL, Web, React DnD, React Native, HTML, Linux, Cloudflare, NGINX, Azure, Heroku, GitHub, GitLab, Web Development, Cryptocurrency, Ethereum, Bitcoin, Google Cloud, Back-end, Back-end Development, Web Scraping, Scraping, Amazon Web Services (AWS), APIs, Leadership, Git, Git Flow, Web Search, Software, Cryptoeconomics, API Integration, Single-page Applications (SPA), MySQL, REST APIs, Angular, NestJS, Next.js, PostgreSQL, DevOps, Material UI, Scrum, Redux, Software Architecture, Full-stack, Search Engine Optimization (SEO), Web Performance Optimization (WPO), Google SEO, Express.js, MEAN Stack, Redis, REST

Full-stack Developer and Consultant

2023 - 2023
GR8 UG Haftungsbeschränkt
  • Consulted the team in setting up persisted and scheduled mailing capabilities.
  • Advised the team with database performance bottlenecks and Node.js event loop in general.
  • Assisted and consulted in setting up the SOCKS5 proxy Docker container to secure database connections.
Technologies: JavaScript, Node.js, Angular, MongoDB, Express.js, B2B, Identity & Access Management (IAM), Heroku, Cloud Platforms, Angular Material, MongoDB Atlas, MEAN Stack, Amazon Web Services (AWS)

Generalist Tech Lead and CTO

2022 - 2023
BitFlow GmbH
  • Audited different codebases by several indicators and development best practices. Consistently looked for red flags regarding technical progress.
  • Administered technical report writing to present and explain audits to multiple VC companies.
  • Added recommendations and standard best practices to report and evaluate possible technical opportunities or threats.
Technologies: Architecture, Due Diligence, Code Auditing, Reports, Scalability

Junior Web Developer

2012 - 2016
Jöllenbeck GmbH - Speedlink
  • Developed a slideshow tool on Raspberry PI, which can connect six different TV screens and show photos that were put on a network drive by professional photographers.
  • Created a space-requirement metered connection and front end, then integrated it into an enterprise resource planning (ERP).
  • Established different accounting tools for the self-developed ERP system.
Technologies: PHP, JavaScript, HTML, CSS, Linux, Web, SQL, Node.js, Windows, Web Development, Back-end, Back-end Development, Git, Software, MySQL

Game Server and Community

A German gaming community with nearly 150,000 registered users and its private game server with more than five years of development. It consisted of a full-stack application, the game server script, and several small-scale projects.


JavaScript, TypeScript, SQL, PHP, HTML, CSS


Node.js, React, REST APIs, React DnD


Web, Windows, Linux, Ethereum, Docker, Azure, Heroku, Amazon Web Services (AWS)


Web Development, Software, Software Development, Cryptocurrency, Back-end, Back-end Development, Web Scraping, Scraping, APIs, Git Flow, API Integration, Single-page Applications (SPA), Software Architecture, Full-stack, School, Business, Cloudflare, Architecture, Bitcoin, Leadership, Web Search, Cryptoeconomics, Google SEO, Due Diligence, Code Auditing, Reports, Scalability, Identity & Access Management (IAM), Cloud Platforms


NestJS, Next.js, Express.js, React Native, Angular, Material UI, Redux, Angular Material


WebStorm, Git, Slack, NGINX, Amazon OpenSearch, GitHub, GitLab, MongoDB Atlas, ELK (Elastic Stack)


REST, DevOps, Scrum, Search Engine Optimization (SEO), Web Performance Optimization (WPO), MEAN Stack, B2B


MongoDB, MySQL, Elasticsearch, Google Cloud, PostgreSQL, Redis

2012 - 2015

Apprenticeship in Software Development

Berufsoberschule (BBS) II - Stade, Germany


Software Developer

Chamber of Commerce and Industry (IHK Stade)

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