Full-Stack Developer & Tech Entrepreneur

Where Innovation Meets Business Value

Transforming complex business challenges into elegant technical solutions. With an entrepreneurial mindset and deep technical expertise, I create innovative applications that deliver real business impact.

Full-Stack Development

Building scalable applications with cutting-edge technologies

Innovation Focus

Transforming ideas into market-ready solutions

Business Impact

Delivering solutions that drive measurable results

Domain Expertise

Leveraging advanced AI and machine learning techniques to build intelligent, scalable solutions across various domains

💻

Web Development

Building modern, responsive web applications with cutting-edge technologies and best practices

React & Next.js

Node.js & Express

MongoDB & PostgreSQL

AWS & Cloud Services

⛓️

Blockchain

Developing secure and scalable decentralized applications and smart contracts

Solidity & Smart Contracts

Web3.js & Ethers.js

DeFi Protocols

NFT Marketplaces

🧠

AI & Data Science

Developing sophisticated machine learning solutions and data-driven systems with real-world applications

ML & Datascience Pipelines

Custom RAG & GPT Models

Sales Forecasting Models

Algorithmic Trading Systems

Explore Projects

Featured Projects

A selection of projects showcasing cross-domain expertise in full-stack development, blockchain innovation, and AI integration

Dopamining: Social Entrepreneurship

Building a mobile application for AI-powered fitness tracking & habit building

ReactPythonSwiftSolidityWeb3.jsGoogle BlazePose

MoreThanCode: AI Music

Website featuring my own AI-generated music, including an advent calendar of musical experiments.

React.jsWebdesignAI Music GenerationSong writing

ChainShare: Blockchain Document Sharing

Blockchain-based ecosystem for fair and ownership-preserving document-sharing in LLM use cases. Master thesis research combining distributed ledger technology with language models.

BlockchainLLMsSmart ContractsReactNode.jsPythonWeb3

FairProfit: Supply Chain Transparency

Blockchain-based system enabling transparent and fair profit distribution across supply chains, developed as bachelor thesis at RWTH Aachen

ReactSolidityIPFSMetaMaskWeb3.jsEthereum

Crypto Market Dashboard

Real-time cryptocurrency analysis dashboard featuring interactive charts, market statistics, and trend visualization

ReactRechartsFramer MotionTailwindCSS

Daily Requests

500,000+

Data Points

Millions

Uptime

99.99%

Latency

<50ms

High-Scale Crypto Market API

Enterprise-grade cryptocurrency data infrastructure processing 500K+ daily requests with real-time market data and historical analytics

Node.jsPostgreSQLRedisDockerAWSWebSocket

Currently Working On

Research Paper: Blockchain x LLM data-sharing solution

Developing an innovative solution that combines distributed ledger technology with advanced language models for ownership-preserving document-sharing.

Smart ContractsLLMsWeb3ReactNode.jsPython

View More Projects

Sascha Nievelstein

Bridging technology, business, and innovation through interdisciplinary expertise

Education

RWTH Aachen University

M.Sc. Computer Science2022 - 2024

BeBuddy • Aachen Blockchain Club

M.Sc. Management & Economics2022 - 2024

EPFL

B.Sc. Computer Science (Exchange)2022

Blockchain Student Association • Erasmus Student Network

RWTH Aachen University

B.Sc. Computer Science2019 - 2022

BeBuddy • UROP

Thesis: Blockchain-based payment to enable fair profit distribution

Experience

Researcher

2024 - Present

Fraunhofer FIT

Blockchain & LLMs

Visiting Associate

2024

Boston Consulting Group

ERP Diagnostics & Digital Transformation

Technical Venture Analyst

2023 - 2024

Freigeist

Seed & Pre-Series A Investments

Full-Stack Developer & AI Engineer

2022 - 2023

Dopamining

Blockchain & AI Solutions

Technical Innovation

Full-stack development with focus on emerging technologies

Business Strategy

Experience in consulting and venture capital

Community Building

Active in blockchain and tech communities