Hi, I'm

Ruud Juffermans

Data Engineer & Blockchain Specialist

I'm passionate about designing and managing data architectures that are scalable, efficient, and that meet the organization's analytical needs.

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About Me

I'm a data engineer based in Amsterdam with a passion for building robust, scalable data systems.

I studied computer science, where I was fascinated by distributed systems, data streams, and blockchain programming. This fascination led me to dive deep into all things related to blockchain and data engineering.

I fell in love with learning new things related to emerging technologies. Whether it's designing fault-tolerant architectures, implementing smart contracts, or optimizing data pipelines, I enjoy tackling complex technical challenges.

I also like to work on my own projects, continuously exploring new tools and technologies to expand my skill set.

Data Engineering

Building scalable pipelines and architectures that handle complex data workflows

Blockchain

Smart contract development, DeFi protocols, and blockchain forensics

System Design

Architecting fault-tolerant, distributed systems for enterprise needs

Experience

Cryptocurrency Specialist

Politie Nederland

Mar 2025 - Present

Providing expertise in blockchain analysis, digital asset investigations, and cryptocurrency tracking. Tracing illicit transactions, analyzing on-chain activity, supporting investigative teams with actionable intelligence, and advising on secure handling of digital assets.

Cryptocurrency AnalysisBlockchain ForensicsDigital Asset TracingInvestigative Tooling

Data Engineer

Nederlands Lucht- en Ruimtevaartcentrum (NLR)

Mar 2024 - Mar 2025

Worked on cutting-edge projects at the intersection of cybersecurity, IoT, supply chain, and blockchain technologies. Led the design and development of a proof-of-concept platform for managing Digital Product Passports.

IoT IntegrationBlockchain ArchitectureCybersecuritySupply Chain TrackingPOC Development

Data Engineer

Boval Assurantien B.V.

Sep 2023 - Feb 2024

Rebuilt a large-scale application responsible for processing daily high-volume data batches. Designed fault-tolerant systems with periodic state persistence to safely recover long-running jobs.

System DesignFault-Tolerant ArchitectureBatch ProcessingTask SchedulingPerformance Optimization

Blockchain Developer

Dealblock Labs

Sep 2019 - Dec 2023

Contributed to the design, development, and deployment of blockchain-based solutions, including smart contract implementation, blockchain architecture design, and integration with existing systems.

Smart ContractsBlockchain ArchitecturedApp IntegrationBackend Integration

Skills & Technologies

Languages & Databases

  • SQL
  • Python
  • NoSQL Databases

Data Engineering

  • Data Warehousing
  • Data Modeling
  • ETL
  • Data Pipeline Design
  • Data Governance

Big Data & Processing

  • Apache Hadoop
  • Apache Spark
  • Stream Processing
  • Big Data
  • Performance Optimization

Cloud & Infrastructure

  • Cloud Computing Services
  • Machine Learning Basics

Blockchain & Web3

  • Smart Contracts
  • Blockchain Architecture
  • Cryptocurrency Analysis
  • DeFi Protocols
  • On-chain Analytics

Projects

A selection of projects I've worked on

Blockchain Analytics Tool

On-chain analysis tool for tracking cryptocurrency transactions, identifying patterns, and generating actionable intelligence for investigative purposes.

BlockchainData AnalysisPythonVisualization

DeFi Protocol Integration

Smart contract development and integration for decentralized finance protocols, including automated market makers and liquidity management.

SoliditySmart ContractsDeFiWeb3

Get in Touch

I'm always open to discussing new opportunities, interesting projects, or potential collaborations. Feel free to reach out!