Blockchain Engineer

Crypto Pro Network; Amsterdam; Hybrid; EUR 110,000 - 160,000; Full time

Job summary

Flow Traders in Amsterdam is seeking an experienced Back-End Blockchain Engineer to join our Digital Assets Technology team. This hybrid role is based in Amsterdam and focuses on building scalable, low-latency back-end systems for DeFi markets.

You will work with trading desks, contribute to architecture of real-time systems, and develop both on-chain and off-chain components including smart contracts and market-making bots. Expertise in Python, Rust, Go, Java and Solidity is essential.

Qualifications

• BSc/MSc/PhD in Computer Science, Software Engineering, or related field.
• 5+ years of commercial software development experience.
• Proficiency in Python, Rust, Go, and/or Java.
• Strong DeFi development experience and blockchain knowledge (nodes, PoW/PoS, Web3).
• Experience with Solidity and/or Rust for smart contracts.
• Experience with distributed systems, microservices and event-driven processing.
• Cloud infrastructure experience (AWS, GCP, or Azure) and Docker/Kubernetes.
• Security best practices in blockchain and backend development.
• Familiarity with Kafka, Redis, gRPC, and WebSockets.

Responsibilities

• Collaborate with trading desks to build scalable, low-latency back-end systems for DeFi markets.
• Contribute to architecture and development of real-time trading infrastructure.
• Develop on-chain and off-chain components, including smart contracts, indexers, and market-making bots.
• Implement APIs and integrate with DeFi protocols, liquidity pools and DEXs.
• Design event-driven microservices for real-time blockchain transaction processing.
• Ensure high availability, reliability and security of back-end systems.

Skills

Python

Rust

Go

Java

DeFi development

Web3 knowledge

Low-latency systems

Blockchain concepts

Education

BSc/MSc/PhD in Computer Science, Software Engineering, or related field

Tools

Docker

Kubernetes

AWS

GCP

Azure

Solidity

gRPC

WebSockets

Kafka

Redis

Job description

Flow Traders is looking for an experienced Back-End Blockchain Engineer to join our growing Digital Assets Technology team in Amsterdam. This is a unique opportunity to work at a leading proprietary trading firm with an entrepreneurial and innovative culture. We value sharp, creative minds and challenge our engineers to leverage their full potential in a high-performance environment. This will be a hybrid role based in Amsterdam.

What you will do

• Work closely with trading desks to develop scalable and low-latency solutions for DEX Trading
• Contribute to the architecture and development of high-performance, real-time trading systems for DeFi markets
• Encourage the team to grow our Blockchain understanding bringing in protocol-specific knowledge and best practices
• Develop and maintain on-chain and off-chain components, including smart contracts, indexers, and market-making bots
• Implement robust APIs and integrate with DeFi protocols, liquidity pools, and decentralized exchanges (DEXs)
• Design and optimize event-driven microservices for real-time blockchain transaction processing
• Ensure high availability, reliability, and security of blockchain-based back-end systems
• Collaborate with Quantitative Researchers, Traders, and Software Engineers to identify and implement automation and acceleration strategies for the Digital Assets desk
• Follow the best software engineering practices which are supported by the best working environment, latest technology and continuous support from all parts of Flow Traders organization

What you need to succeed

• BSc, MSc, or PhD in Computer Science, Software Engineering, or related fields
• 5+ years of commercial experience in software development
• Strong expertise in one or more back-end programming languages: Python, Rust, Go, Java
• Solid experience in DeFi development (protocol interactions, arbitrage, liquidity management).
• Strong blockchain knowledge, including nodes, consensus mechanisms (PoW, PoS), and Web3
• Experience with smart contract development in Solidity and/or Rust
• Deep understanding of backend architecture, including scalable distributed systems, microservices, and event-driven processing
• Hands-on experience with cloud infrastructure (AWS, GCP, or Azure) and containerization (Docker, Kubernetes)
• Understanding of security best practices in blockchain and back-end development (e.g., private key management, transaction signing, API security)
• Familiarity with Kafka, Redis, gRPC, and WebSockets for real-time data processing
• Experience working with on-chain data analysis, indexers, and oracles, a plus
• Knowledge of MEV (Maximal Extractable Value) strategies and blockchain transaction ordering,a plus
• Prior experience working in low-latency, high-performance trading environment, a plus