EXPLORE

(7 reviews)

Tobias K.

@tobiask5

5.0

5.2

100%

Web Development

$50 USD / Hour

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Germany (10:47 PM)

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Joined on November 9, 2024

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1 Recommendation

$50 USD / Hour

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With over 8 years of hands-on experience in software development, I am a seasoned professional with a strong background in full-stack. Front-End Technologies: React.js, HTML5, CSS3, React Native, Flutter, WordPress Back-End Technologies: Node.js, Laravel, Django, FastAPI, Express.js, Convex, Sanity Database Management: SQL, NoSQL, PostgreSQL, MongoDB DevOps & Tools: D AWS, Azure, Stripe What sets me apart is my problem-solving prowess and a proactive, can-do attitude. I thrive in challenging environments where I can bring fresh perspectives and develop cutting-edge solutions. Whether you need a robust application, an intuitive user interface, or seamless system integration, I am committed to delivering exceptional results tailored to your needs.

Verifications

On time

100%

On budget

100%

Accept rate

91%

Repeat hire rate

See all PHP Developers in Germany

Portfolio

I was responsible as team leader for all tasks connected to the website and online services of the University, including the relaunch of the official UMCH website, creating a support ticket system, creating a check in and check out system for students or teacher that were staying at UMCH apartmens, and several more.
-Building UI with NextJS
-Building backend with Sanity.

UMCH - Universitätsmedizin Campus Ha

I designed and developed the website perren.swiss using WordPress, based on the client’s detailed specifications. The design was implemented using a carefully selected theme, which I customized to reflect the client’s branding and service structure. The final result is a responsive, intuitive, and professional web presence for a company specializing in vehicle sales, rentals, and maintenance.

A key technical challenge in this project was the implementation of a custom API integration with an external automotive marketplace. This API allows real-time import and display of both rental and purchase vehicles directly on the website—ensuring up-to-date listings without manual updates. The integration was designed to be robust, seamless, and fully aligned with the site’s design and performance requirements.

Custom Website with API Integration

I developed the entire website shopwithme.biz using WordPress, based on a custom design template provided by the client. The site was built to perfectly match the original design while ensuring full responsiveness across all devices.

One of the key challenges was implementing a multilingual setup without compromising website speed or causing compatibility issues. I solved this by configuring a lightweight and optimized multi-language system. Additionally, I made the site replicable—allowing the client to duplicate it across multiple subdomains and customize each version as an independent landing page for various purposes and campaigns. This architecture offers flexibility, scalability, and performance without complexity.

Custom Multi-Language WordPress Webs

I rebuilt and optimized the entire website aboandmore.ch using Oxygen Builder. My work included complete speed optimization, mobile responsiveness, on-page SEO, accessibility improvements, and a streamlined checkout experience. The result is a fast, user-friendly, and conversion-optimized website.

Relaunching and Optimizing a Webshop

- Developed Anonydoxx decentralized application (DApp) utilizing ADXX, an anonymous token, to enhance user privacy and security.
- Created a DApp dashboard using React.js, Web3.js to provide a comprehensive and user-friendly interface and deployed some smart contracts using solidity.
- Integrated facial recognition APIs to implement robust account verification and enhance security.
- Designed and launched an Initial Coin Offering (ICO) for ADXX, facilitating the token's distribution and fundraising efforts.
- Built an NFT minting website to enable users to create and manage their digital assets seamlessly.

Web 3 Developer

- Developed a Web3 payment system using Vue.js and Nuxt.js to facilitate seamless cryptocurrency transactions.
- Managed full lifecycle software development, from planning and design to deployment and ongoing maintenance, ensuring comprehensive project oversight.
- Executed scripts for backend server communication to deliver real-time updates and enhance user experience.
- Implemented optimizations in Vue 3 and Nuxt.js to reduce Web3-related issues, improving application performance and reliability.

Blochchain Game Developer

UMCH - Universitätsmedizin Campus Ha

Custom Website with API Integration

Custom Multi-Language WordPress Webs

Relaunching and Optimizing a Webshop

Web 3 Developer

Blochchain Game Developer

5.0 · 7 Reviews

Reviews

Javadcript Editor.js toolbar and text misalignment with title underline in Nuvpad • $200 USD

Thanks a lot. Tobias is a good freelancer.

+3 more

Matthew N.

@MatthewNorth

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Melbourne, Australia

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3 months ago

Shopify Gift Voucher QR Code Tool • €2,250 EUR

Tobias was capable of carrying out this complex project in a short period of time. He has a very structured way of analyzing the customer's needs and documents everything well in a requirements document. He is also a strong communicator and has great professional skills, including knowledge of a consultant when it comes to choosing the programming language, suitable project platform, etc. I can highly recommend him as a developer.

+5 more

Alexander D.

@bcwrgbg

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Regensburg, Germany

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3 months ago

First milestone • $500 USD

Exceptional programmer and very proficient communicator. Unfortunately, due to issues on my end not originally explained in the project we were unable to implement the code. However, Tobias was very accommodating.

+1 more

Ian R.

@ianreith

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Fresno, United States

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7 months ago

Development Support - 08/04/2025 15:23 EDT - 09/04/2025 14:25 EDT (archived) • €280 EUR

job done, professional communication

Jonas B.

@jonas195

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K, Luxembourg

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7 months ago

WordPress Blog Setup • $30 USD

Punctual and responsible freelancer.

Marius J.

@MariusJens

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Oslo, Norway

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8 months ago

Full Stack developer

Sep, 2024 - Nov, 2024

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2 months

UMCH

Sep, 2024 - Nov, 2024

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2 months

-Building responsive UI with NextJS -Building backend with Sanity.

Hamburg, Germany

Sep, 2024 - Nov, 2024

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2 months

Web3 developer

Sep, 2023 - Jun, 2024

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9 months

Slash Fintech Limited

Sep, 2023 - Jun, 2024

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9 months

Building Web3 payment system using Vue3 + Nuxt3js. -Conducting full lifecycle software development from planing to deployment and maintenance. Executing scripts to communicate with backend servers and provide real time updates. -Implementing optimization to decrease web3 issues in Vue3 and Nuxt3js.

Tokyo, Japan

Sep, 2023 - Jun, 2024

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9 months

Web3 Developer

May, 2020 - Jul, 2023

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3 years, 2 months

Anonydoxx, Miami

May, 2020 - Jul, 2023

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3 years, 2 months

-Building Anonydoxx Dapp with adxx, an anonydoxx coin. -Buiding Dapp Dashboard using Reactjs + web3js + Smart contract. -Integrating Face Recognition API to verify account. -Building ICO for adxx. -Building NFT minting website.

May, 2020 - Jul, 2023

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3 years, 2 months

Hochschule Niederrhein

2006 - 2008

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2 years

Master of computer science

Germany

2006 - 2008

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2 years

Preferred Freelancer Program SLA

JavaScript

Python